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SECTION 16410 415 HZ POWER SYSTEM 410.01 GENERAL A. Overview The work covered by this Section consists of furnishing, installing, connecting, testing and placing in operation a continuous duty, regulated, 415 HZ, 208 volts AC, 3-phase, 3-wire power system for selected computer equipment loads. The system shall be fully coordinated and compatible with electrical, environmental and space conditions at the site. The 415 HZ power system shall consist of frequency converting equipment and distribution equipment. The frequency converting equipment shall be either of the following: 1. Static Frequency Converter consisting of a rectifier/battery charger, batteries, invertor, synchronizing equipment, protective devices and automatically effect continuity of 415 HZ electric power within specified tolerances to the 415 HZ computer equipment load, without interruption, regardless of the condition of the normal 60 HZ power supply. In the event of normal power supply failure, continuity of power to the load shall be maintained for an emergency period of up to 3 minute with the inventor supplied by the batteries, to allow orderly shutdown of the computer equipment. If an alternate power source is available, such as standby engine generator set, the static frequency converter shall operate as an uninterruptable power system (UPS) to provide continuous power to the computer equipment. 2. Motor Generator Set consisting of 60 Hz AC motor, 415 Hz AC generator, controls and accessories as specified herein. Motor and generator rotors shall be stacked on a common shaft and the motor and generator starters shall be contained in a single frame. Paralleling equipment shall be provided where multiple frequency converting equipment are used for the same system. 415 Hz power distribution equipment shall consist of feeders, distribution panels, branch circuit wiring and computer equipment connections. B. 16410-rev0 Manufacturer 1. Static Frequency Converter shall be as manufactured by Emerson or Exide. 2. Motor Generator Set shall be as manufactured by Kato or G.E. 16410 - 1 December 2004 SECTION 16410 415 HZ POWER SYSTEM C. Material All materials shall be new and listed by the Underwriters Laboratories, and shall meet their requirements and bear their label wherever standards have been established or shall show evidence of approval by an acceptable independent testing laboratory, and shall conform to the applicable specifications and standards of the Institute of Electrical and Electronics Engineers (IEEE), American National Standards Institute (ANSI), Joint Industry Committee (JIC), Insulated Power Cable Engineers Association (IPCEA), National Electrical Manufacturers’ Association (NEMA), and National Fire Protection Association (NFPA). Canadian equivalent listing and standards are acceptable. Materials and workmanship are subject to approval by the Engineer. Any portion of the work, which, in the judgement of the Engineer, is defective shall be replaced by the Contractor as part of this Contract, at no additional cost to HGST. Each component shall be of current manufacture from a firm regularly engaged in the production of such equipment. The bidder shall submit with his proposal, a list of three (3) installations of motor-generator sets or static frequency converters engineered by the bidder, which have been installed within the past three (3) years and are operating satisfactorily, and which use major components of the same or similar type as the bidder proposed to furnish. D. Submittals Provide complete manufacturer’s descriptive information and shop drawings for all equipment, material, and devices to be furnished. The shop drawings shall include certified outline drawings, arrangement drawings, construction details, schematic diagrams, interconnection and connection diagrams in accordance with provisions in these documents. Manufacturer’s standardized diagrams will not be accepted unless applicable portions of the diagram have been clearly identified and nonapplicable portions deleted or cross out. The following drawings and information shall be submitted with the proposal: 16410-rev0 1. Single line diagram depicting the system configuration. All circuit breakers shall be identified by location, type, catalog number, frame size, trip rating and manufacturer with type number. 2. Functional relationship of various equipment including weights, dimensions, heat dissipation and detailed foundation requirement of each unit. 16410 - 2 December 2004 SECTION 16410 415 HZ POWER SYSTEM 3. Detailed descriptions of equipment to be furnished. Any deviations from these Specifications shall be submitted during bid period. 4. Size and weight of individual shipping units to be handled by Contractor in the field. Detailed layouts of all metering and alarm panels. The metering sensing points shall be shown on the single line diagram. 5. 6. Equipment delivery time in calendar days. The following drawings and information shall be submitted within 30 days after award of Contract. 1. Detailed installation drawings including all terminal locations. 2. Interconnect wiring diagrams showing all conduit runs and wiring with terminal numbers for each wire. A test report showing that the equipment has passed the factory tests and has demonstrated the full output ratings required by this Specification shall be submitted 7 calendar days prior to delivery of the equipment. E. Instruction and Operating Manuals Subsequent to final completion and testing operations, instruct HGST designated personnel in operation, adjustment and maintenance of the 415 Hz power equipment. Submit four (4) complete sets of instruction and operating manuals. The manuals shall include a functional description of the equipment with detailed block diagrams, safety precautions, step-by-step instruction of operating and maintenance procedures, seismic and foundation details, and a list of recommended spare parts. F. Warranty The contractor shall provide HGST a one year warranty. The warranty period starts upon written documentation that the 415 Hz power system is functioning properly and is accepted by HGST. This warranty shall cover all defects in materials, equipment and workmanship, but will not cover theft, Acts of God, or any defects that occur due to malicious behavior. All repairs and replacement costs of defective items during the warranty period shall be borne by the Contractor. 410.02 DESCRIPTION OF STATIC FREQUENCY CONVERTER A. 16410-rev0 Operation 16410 - 3 December 2004 SECTION 16410 415 HZ POWER SYSTEM The utility company power source shall be used to supply power to each rectifier/charger unit. The rectifier/charge shall be solid state and shall covert incoming AC power to DC power. The rectifier/charger output shall be fed into a solid state invertor. The invertor shall convert the DC power into 415 Hz AC power which shall supply the load. Upon failure of input AC power, input power for the invertors shall automatically be supplied from the battery with no interruption to or disturbances of the system output in excess of the limits specified herein. At the same time, the system shall energize an alarm circuit and associated trouble indicators. When the AC power is restored, input power for the invertors and for recharging the battery shall automatically be supplied from the rectifier/charger outputs without interruption of disturbances in excess of limits specified herein. If the battery is exhausted before AC power returns, the system shall shutdown automatically. B. Configuration The static frequency converter system shall consist of two or more modules of the same size operating in parallel. All modules shall be operating and sharing the load. The system shall be redundant. The system shall have one additional module than that required to supply the full rated load. The failure of any one of the modules shall cause that module be disconnected from the system by its static isolator and the remaining module(s) shall continue to carry the load. Upon repair of the module, it shall be reconnected to the system to resume redundant operation. Any module shall also be capable of being taken off the system manually for maintenance without disturbing the system bus. The system shall include system control cabinet, controls, metering, alarms and batteries. C. Rating The static frequency converter shall be sized to provide a minimum output KVA and KW as shown on the Drawings, with one system module out of service. The utility input voltage shall be 480 VAC, 60 Hz three-phase, threewire. The output voltage shall be 208 VAC, 415 Hz three-phase, threewire. The static frequency converter system shall have an efficiency of not less than 82%. The static frequency converter shall have necessary filters to prevent malfunction of the electronic master clocks system caused by system interference. 16410-rev0 16410 - 4 December 2004 SECTION 16410 415 HZ POWER SYSTEM D. E. Input Characteristics 1. Voltage Range +/-10% 2. Frequency Range +/-5% 3. Current In-rush Limiting Gradually increase input current from 20% to 100% of full rated load over 15 seconds. 4. Magnetizing Sub-cycle Inrush 8 times normal full load input current maximum. 5. Power Factor 0.83 to 0.95 lagging at full load. 6. Current limit Maximum of 125% normal full load input current. 7. Harmonic Feedback Maximum 10% RMS total. Output Characteristics 1. Voltage Regulation +/-0.5% for balanced load, +/-2% for 50% unbalanced load. 2. Voltage Adjustment Range +/-5% manually 3. Frequency Frequency Regulation 415 Hz 0.1% 4. Phase Displacement Balanced Loads 50% Unbalanced Loads 120 +/-1 120 +/-3 5. 6. Voltage Unbalance - Balanced Load - 20% Unbalanced Load +/-1% from the arithmetic average of the 3 phases - 50% Unbalanced Load +/-2% from the arithmetic average of the 3 phases Voltage Transients (in percent of rated voltage) (1) 20% Load Step 16410-rev0 +/-1% from the arithmetic average of the 3 phases 16410 - 5 +/-4% December 2004 SECTION 16410 415 HZ POWER SYSTEM (2) 30% Load Step +/-5% (3) 50% Load Step +/-8% (4) Loss of return of AC input power +/-1% F. 7. Voltage Transient Recovery Time To within 1% of output voltage rating within 50 milliseconds. 8. Harmonic Content Maximum 5% RMS total, Maximum 3% any single harmonic 9. Overload with full Voltage 125% of its full load rating for a period of 10 minutes 150% of the full load rating for a minimum of 30 seconds 10. Current Limit 150% full load current 11. Fault Clearing Instantaneous clearing of the fault current greater than 300% and limit the fault current to within 500% of normal full load current. Environmental Conditions The static frequency converter system shall be capable of withstanding any combination of the following external environmental conditions without mechanical or electrical damage or degradation of operating characteristics: 16410-rev0 1. Operating ambient temperature: System Module 0C to 40C Battery 25C +/-5C 2. Nonoperating and storage ambient temperature: -20C to 70C 3. Relative humidity 0% to 95% for temperature in the operating range without condensation. 4. Barometric pressure: Operating - From 0 to 4,000 feet above sea level Nonoperating & storage - From 0 to 4,000 feet above sea level 16410 - 6 December 2004 SECTION 16410 415 HZ POWER SYSTEM G. Audible Noise Noise generated by the static frequency converter system under any condition of normal operation shall not exceed the allowable sound pressure level of 75 dB measured at 6 feet from the nearest surface of the cabinet. H. Grounding The static frequency converter AC neutral and ground system shall be connected together at a common ground point. The equipment chassis shall be provided with a ground bus. I. Efficiency The efficiency of the system is to be measured under the following conditions: J. 1. The system is operating at full rated load, KVA and KW. 2. The battery is fully charged and floating on the system. 3. The input voltage is within the specified range. 4. Efficiency is defined as the output KW times 100 divided by the input KW, and shall be 82% minimum. Rectifier/Charger Unit The Rectifier/Charger unit shall include but not limited to the following components: 16410-rev0 1. Each rectifier/charger unit shall be solid state and shall provide direct current to the invertor unit for battery charging. 2. Each rectifier/charger unit shall be provided with an input circuit breaker. The circuit breaker shall be of the frame size and trip rating to supply full rated load to the 415 Hz computer equipment load and recharge the battery at the same time. The circuit breaker shall be provided with an UNDERVOLTAGE trip so that the circuit breaker will open automatically when the control voltage is lost. The circuit breaker shall have an interrupting rating of, not less than, 22,000 symmetrical RMS amperes. 3. A dry type power transformer of the isolated winding type shall be used for each rectifier unit. It shall be of copper wiring exclusively and have one 5% tap below and one 5% tap above rated voltage. The transformer’s hottest spot winding temperature shall not exceed the temperature limit of the transformer insulation class of material when operating full load at maximum ambient temperature of the transformer location within the rectifier/charger 16410 - 7 December 2004 SECTION 16410 415 HZ POWER SYSTEM unit. The transformer shall be designed for continuous operation at rated KVA with maximum temperature rise of 80C in a 40C maximum ambient and 30C average ambient. If the transformer has two secondary windings, they shall be connected delta-delta, phase shifted 180 apart to reduce input harmonics. K. 4. Each rectifier/charger unit shall provide for input current limiting and battery recharge current limiting. Both shall be independently adjustable. The input current limit shall be adjustable for 100% to 125% full load. The battery recharge current limit shall be adjustable from 2% to 25% of the maximum discharge current. 5. The rectifier/charger unit shall provide features whereby when the AC power is turned to the AC input but after the static frequency converter system has been operating on battery power or has been de-energized, the total initial power requirement at the input terminals will not exceed 20% of rated load, and the power will gradually increase to 100% of full rating over a 15-second time interval. 6. Power semiconductors in the rectifier/charger shall be fused with fast acting fuses, so that loss of any one power semiconductor will not cause cascading failures. All fuses shall be provided with a blown fuse indicator with an alarm light on the control panel. 7. The rectifier/charger unit shall have an output filter to minimize ripple current into the battery. Under no conditions shall ripple current into the battery exceed 3% RMS. The filter shall be adequate to ensure that the DC output of the rectifier/charger will meet the input requirements of the invertor. Each static frequency converter system module shall have the capability of having the invertor operated from the rectifier with battery disconnected. 8. In addition to supply power for the load, the rectifier/charger shall be capable of recharging the battery as specified herein. The charging rate shall be sufficient to restore the batter from discharge to 95% charge within ten (10) times the discharge time. After the battery is recharged, the rectifier/charger shall maintain the battery at full charge until the next emergency operation. 9. There shall be DC over voltage protection so that if the DC voltage raises to the pre-set limit, the system module will shutdown automatically. Inverter Unit 1. 16410-rev0 Each invertor unit shall be a solid state device capable of accepting the output of the rectifier/chargers or battery and providing rated output within specified limits. 16410 - 8 December 2004 SECTION 16410 415 HZ POWER SYSTEM L. 2. The invertor shall be able to sustain an overload across its output terminals of up to 150% load, while supplying any load within its rating, without reducing the output voltage. The invertor shall limit current for any loading over 150% rated load by reducing the output voltage. The invertor shall be capable of supplying at least 300% current during short circuit conditions. If the short circuit is sustained, the invertor shall shutdown and disconnect automatically from the system bus. 3. The output frequency of the invertor shall be controlled by an oscillator. The oscillator shall be temperature compensated and capable of being adjusted +/-15 Hz of rated frequency. The oscillator shall hold the invertor output frequency to +/-0.1% during a 24 hour period. Total frequency deviation, including short time fluctuations and drift, shall not exceed +/-0.1% from the rated frequency. 4. Electronic control shall be incorporated to provide individual phase voltage compensation to obtain phase balance under all conditions up to 50% load unbalance. 5. For increased reliability the invertor shall be limited to a 6-pole type using a maximum of 12 main power SCR’s. 6. Each invertor unit in the system shall have fault sensing and static isolation as well as an output circuit breaker for removal of a faulted mode from the system, without affecting the critical load bus beyond the stated limits. 7. For parallel operation, all invertor units shall automatically load share at all times. The output currents of individual system modules shall be not more than +/-5% unbalanced. 8. Power semiconductors in the invertor shall be fused with fast acting fuses to prevent cascading the failures. Each fuse shall be provided with a blown fuse indicator with an alarm light on the control panel. Protection 1. 16410-rev0 Each static frequency converter system module shall have built-in self-protection against over voltage power line surges, under voltages and over current introduced by the primary AC source, over voltage and voltage surges introduced at the output terminals by paralleled sources, load switching and circuit breaker operation in the distribution system. Each system module shall be selfprotected against over current, sudden changes in output load and short circuits at the output terminals. 16410 - 9 December 2004 SECTION 16410 415 HZ POWER SYSTEM 2. Each system module shall have built-in protection against permanent damage to itself and the connected load for all predictable types of failures within itself and the connected load for all predictable types of failures within the system. 3. Fast-acting current limiting devices shall be used to protect against failure of solid state devices. Internal failures in a system module shall cause the module to trip off-line with minimum damage to the module and to provide maximum information to maintenance personnel regarding the reason for tripping. Open protective devices shall be indicated by appropriate lights (LED type) on the control mimic panel(s). 4. Under parallel redundant operation, the protection system shall have control logic capable of isolating only the faulted module, and shall not shut down the entire system for a fault in one module. M. Module Control Section N. 1. Each static frequency converter system module shall be provided with a control section to provide monitoring and control of the system module. The meters, alarms, controls and mimic panel shall be located on the control section door. The control logic shall be located in the control section, physically barriered and separated from all heat sources and high voltage hazards. The control fuses shall likewise be located in a separate section behind a hinged door to minimize electrical shock, hazards. 2. There shall be two (2) power supplies for the logic and control circuits for each system module, one connected to the input AC power source and the other connected to the system module output. Battery operated power supplies for control will not be permitted. Module Instrumentation The following meters shall be provided for the static frequency converter system. 1. Input voltage and current meters with phase selector switch. 2. DC battery charge/discharge current meter. 3. DC battery voltage meter. 4. Inverter output voltage and current meters with phase selector switch. All system module meters shall be 4 ½ inch square, switchboard type with an accuracy of at least 2%. 16410-rev0 16410 - 10 December 2004 SECTION 16410 415 HZ POWER SYSTEM O. Alarm Indicator Each static frequency converter system module shall include, as a minimum, the following alarm indicators. Any one of these conditions shall also turn on the appropriate summary indicator and audible alarm on the system control panel. 1. 2. 3. 4. 5. 6. 7. 8. P. Fuse Blown Overload DC Over voltage Equipment Overtemperature Low Battery Shutdown Battery Circuit Breaker Open Fan Failure Control Power Failure Controls Each system module shall include, as a minimum, the following controls: 1. 2. 3. Lamp test/reset pushbutton Battery circuit breaker trip pusbutton Inverter output circuit breaker trip pushbutton Q. Mimic Panel Each system module shall have a mimic panel in the format of a module single line diagram with status indicators for input, output, and battery circuit breakers. Each circuit breaker shall have two (2) lights, one lit when the circuit breaker is closed (green) and the other lit when the circuit breaker is open (red). R. System Module Battery Circuit Breaker Each system module shall have a battery circuit breaker with shunt trip. This circuit breaker shall be mounted in a separate NEMA-1 enclosure. When open there shall be no battery voltage present in the system module enclosure. The system module shall present in the system module enclosure. The system module shall automatically be disconnected from the battery by abnormal voltage conditions or when signaled by other control functions. The system module shall be provided with a pushbutton to trip this battery circuit breaker from the module control panel. S. System Control Cabinet The static frequency converter system shall be provided with a free standing system control cabinet providing monitoring and control of the 16410-rev0 16410 - 11 December 2004 SECTION 16410 415 HZ POWER SYSTEM complete system. The system control cabinet shall also contain a main bus to collect the regulated output of each system module. The system control logic shall be physically barriered and separated from the power section. The system meters, alarms controls, and mimic panel shall be located on the control section door. The system level control fuses shall likewise be located in a separate section behind a hinged door to minimize electrical shock hazards. The system control cabinet shall be provided with the following meters as a minimum: 1. AC voltmeter with selector switch to monitor the system output. 2. Output AC ammeter 3. Frequency (400 - 430 Hz) All meters shall be 4-1/2 inch square, switchboard type with an accuracy of at least 2%. A phase selector switch shall be provided for these meters. The following system control functions shall be provided as a minimum: 1. AC output voltage adjust +/-5% 2. AC output frequency adjust 400 to 430 Hz 3. System audible alarm with alarm silence and reset pushbuttons 4. Emergency shutdown pushbutton with protective cover The system control cabinet shall be provided with local emergency shutdown provisions. Activation of the local emergency shutdown shall cause all module input, output and battery circuit breakers to open, completely isolating the system from all sources of power. In addition, the emergency shutdown shall be able to accommodate connection to the user’s remote emergency shutdown in the computer room. The system control cabinet shall be provided with automatic over voltage sensing to protect the computer equipment. Should the output voltage rise to more than 10% above the nominal voltage, the system shall automatically cause the voltage to drop and remain below 200 volts and shutdown the system within 0.5 seconds. The system control cabinet shall be provided with local and remote output voltage sensing provisions. A local/remote switch shall be mounted on the cabinet door to allow monitoring of the sensed circuit. An AC output monitoring plug shall be provided on the cabinet door. 16410-rev0 16410 - 12 December 2004 SECTION 16410 415 HZ POWER SYSTEM The system shall be equipped with a 50V DC proportional supply to provide a readout to the computer equipment. The 50V DC proportional supply shall be provided with monitor test points mounted on the system control cabinet door. The local/remote voltage sensing switch shall also be used to select the input of the 50 Volt proportional supply. Provide transducer to give 5-20 mA or 1-5V output for future use. T. Storage Battery A storage battery shall be furnished for the static frequency converter system with sufficient capacity to maintain system output at the specified load for 3 minutes. The battery shall provide 100% of the specified capacity at initial start-up. The battery shall be of heavy duty industrial type designed for stationary power service. The battery cell shall be lead-calcium type. The containers shall be impact resistant plastic of a design proven from field experience. Each cell shall be equipped with a safety vent. The specific gravity of the electrolyte shall not be less than 1.210 nor more than 1.250 at 25C. A float voltage 2.25 volts per cell shall be used for the lower specified gravity and for the higher specific gravity the float shall be 2.30 volts per cell. The minimum discharge voltage shall not be lower than 1.63 volts per cell. Battery shall be supplied with: U. 1. Racks protected with electrolyte resistant paint and designed for seismic zone 4 installation. 2. Intercell and invertor connectors for racks, end-to-end and/or back-to-back. 3. Hydrometer and thermometer. 4. Special tools and fittings required to assemble the battery. 5. Cell numerals. 6. Layout and assembly instructions and parts lists. Remote Alarm Panel A wall mounted NEMA 1 enclosed remote alarm panel shall be provided and shall include, as a minimum, the following devices: 16410-rev0 1. System on battery alarm and light. 2. Low battery alarm and light. 16410 - 13 December 2004 SECTION 16410 415 HZ POWER SYSTEM 3. Output over voltage and light. 4. Summary alarm for all module malfunctions. 5. New alarms - A separate alarm for a second summary alarm condition. 6. Audible alarm with silence and reset pushbuttons. 7. Lamp test./reset pushbutton. All alarm lights shall be long life LED type: incandescent bulbs shall not be used. An audible alarm shall be activated when any of the above alarms come on. V. Self-Diagnostic Circuitry The static frequency converter system shall be provided with built-in diagnostic circuitry for troubleshooting and circuit alignment aids. The following shall be considered as minimum requirements: 1. Indication of rectifier in control mode. 2. Indication of module synchronizing with system load bus. 3. Indication of positive DC bus ground fault. 4. Indication of negative DC bus ground fault. 5. Indication of the degree of overload. 6. Indication of UNDERVOLTAGE trip for battery circuit breaker. 7. Indication of UNDERVOLTAGE trip for module input circuit breaker. 8. Indication of UNDERVOLTAGE trip for module output circuit breaker. W. Line Drop Compensator One (1) line drop compensator (LDC) shall be provided on the load side of the system to compensate for the voltage drop due to the varying distance of the load branch cable length. The LDC shall be provided as a spare unit to be used in the future for direct connection of computer equipment to the system equipment. The voltage compensation shall be accomplished by a capacitor filter tuned to the inductive line. Active circuits such as SCR’s, transistors or other semiconductors shall not be used. 16410-rev0 16410 - 14 December 2004 SECTION 16410 415 HZ POWER SYSTEM The LDC shall be housed in the system control cabinet or in a LDC cabinet. Each LDC shall contain: 1. 2. 3. 4. A branch load circuit breaker. Voltage adjustment taps. Overload sensor. Auxiliary contacts. The LDC cabinet shall be compatible, electrically and physically, with the system control cabinet. The LDC cabinet shall be capable of being attached to the system control cabinet. The LDC cabinet shall be constructed with electrical barriers so that individual LDC assemblies can be removed and reinstalled without shutting down other LDC’s. The branch load circuit breaker’s line side shall be behind electrical barriers when the LDC assembly is removed. After the initial adjustment, the LDC shall automatically compensate for line voltage drops due to any load change. The LDC shall compensate up to a 20% voltage drop in 4% steps. The LDC shall be current limited and contain a fast acting solid state overload sensor. When a fault or a overload occurs in the load branch, the LDC shall limit the current the system has to supply to the load branch until the overload sensor can trip the branch circuit breaker open, minimizing the voltage transients to other branch loads. Each LDC load branch circuit breaker shall have auxiliary contacts, one normally open an done normally closed, for monitoring circuit breaker position by user. X. Miscellaneous Requirements All materials and parts comprising the system shall be new, of current manufacture, of a high grade and free from all defects and imperfections and shall not have been in prior service, except as required during factory testing. All active electronic devices shall be solid state. All semiconductor devices shall be hermetically sealed. Vacuum tubes shall not be used for any purposes. All relays shall be dust tight. The maximum working voltage, current and di/dt of all solid state power components and electronic devices shall not exceed 75% of the ratings established by their manufacturer. The operating temperature of solid state component cases shall not be greater than 75% of their ratings. Electrolytic capacitors shall be computer grade and be operated at no more than 90% of their voltage rating. 16410-rev0 16410 - 15 December 2004 SECTION 16410 415 HZ POWER SYSTEM Wiring practices, materials and coding shall be in accordance with the requirements of the National Electrical Code, and applicable local codes and standards. All bolted connections of bus bars, lugs and cables shall be in accordance with requirements of the National Electrical Code and other applicable standards. All electrical power connections shall be torqued to the required value and marked. The system equipment shall be constructed in NEMA Type 1 enclosures, designed for floor mounting. The system equipment shall be structurally adequate and have provisions for system bracing, hoisting, jacking and forklift handling. The individual cabinets shall be capable of being arranged either butted side-by-side or butted back-to-back. Wire shall be protected in a manner which separates power and wiring. Provisions shall be made in the cabinets to per installation of input, output and intercabinet cabling, raceway or conduit. The system cabinet shall be cleaned, primed and painted with the manufacturer’s standard color. The system cabinet shall be cleaned, primed and painted with the manufacturer’s standard color. Adequate ventilation with dust filter shall be provided to ensure that all components are operated within their environmental ratings. The cooling fans shall be redundant. All fans shall be equipped with wind vane sensors connected to an alarm on the module control panel. Temperature sensors shall be provided to monitor temperature critical components. Upon detection of temperatures in of component manufacturer’s recommended ambient working temperature, the sensors shall cause audible and visual to be sounded on the module control. Provide alarm silent reset pusbuttons. 410.03 DESCRIPTION OF MOTOR GENERATOR SET A. Operation The motor generator (MG) set shall convert the utility input power into mechanical rotation by an AC motor, and convert to 415 Hz, 208 volts, 3-phase, 3-wire output power through an AC generator. The motor generator and controls shall be capable of satisfactorily operating at 115% of rated load for 2 hours before protective devices operate. The MG set shall operate at 100% of rated load continuously and 200% of full rated load for 1 minute. 16410-rev0 16410 - 16 December 2004 SECTION 16410 415 HZ POWER SYSTEM Efficiency of the MG set shall be 82% minimum at rated load and 75% minimum at half load. The MG set noise level shall not exceed 80 dBA at a distance of 3 feet from the unit. Radio frequency interference generated from the MG set shall be factory suppressed. The MG set shall be so designed as to be interference free to communications system. B. Configuration 1. The motor generator set shall consist of a motor, generator, exciter, and voltage regulator with standard controls, protective devices, instrumentation, paralleling equipment and accessories as specified herein. 2. The MG set shall be induction motor, synchronous generator, self ventilating design for operation at no more than 1800 RPM. 3. Rotating Equipment: The motor, generator, and exciter shall be combined on a common shaft of two-bearing construction. The complete shaft assembly shall be statically and dynamically balanced. All frame and enclosures shall be vermin proof. System requiring external cooling fans is not acceptable. 4. The rotor and bearings shall be capable of safe operation at a speed of 35% in excess of the generator rated speed. The rotor body shall be constructed of a solid steel forging of laminated segments of high grade electrical sheet steel. Each field pole winding shall be constructed to make a rigid and durable rotating field assembly. The rotor coil shall be so constructed as to withstand the mechanical stresses due to the maximum operating overspeed in combination with the forces resulting from the maximum excitation and zero armature current. The field coils shall be so insulated as to safely withstand voltages which may be impressed upon them under all operating and emergency conditions. The conditions shall include the maximum voltages obtainable from the rapid response excitation system used with the generator, and the transient voltages obtainable from the rapid response excitation system used with the generator, and the transient voltages encountered. 5. 16410-rev0 The MG assembly shall be statically and dynamically balanced in manufacture to a maximum permissible vibration level of one (1) mil peak-to-peak. 16410 - 17 December 2004 SECTION 16410 415 HZ POWER SYSTEM 6. The rotating mass of the MG set shall have sufficient stored inertia to meet the requirements of regulation and operation as specified. 7. The motor and generator stators shall be built of high-grade silicon steel laminations with precision punchings, deburred, and individually installed. The stator windings shall be braced to withstand 3-phase short circuits at their terminals without injury to the stator winding. 8. The MG bearing shall be heavy duty ball type of degasses steel. Each bearing shall have a minimum life of 50,000 hours and a design life of 75,000 hours (minimum) when the unit is operated at full load and rated temperature. The bearing housing and closure shall be supplied with a feedthrough greasing system to ensue complete bearing lubrication. 9. Lifting Attachments: One lifting eye shall be provided on the motor and one on the generator to support these components during lifting (horizontally only). The complete motor-generator shall be designed for lifting and transporting by forklift trucks. 10. Control Cabinet: All controls, indicating lights, protective devices, and instruments shall be mounted in the control cabinet. 11. Wiring: All wiring shall have ample service loops and be protected from abrasion. Wiring and wiring harnesses shall be secured at least every 6 inches. All terminals shall be identified in accordance with the wiring diagram. C. 16410-rev0 Motor Characteristics 1. The AC motor shall be an 1,800 RPM, squirrel-cage induction, self ventilated, dripless type with windings which are impervious to oil, solvents, moisture, mild acid and alkalies. 2. The windings shall be copper, Class F insulation, 100% vacuum impregnated, rated at 80C rise. 3. The generator exciter shall be rated at least 2.5 times the normal operating voltage. 4. Kilowatt rating shall be as shown on the Drawings. 5. Output Rating: 208V, 415 Hz, 3-phase, 3-wire. 6. Power Factor: 80% (lagging). 7. Voltage Build Up: Initial voltage build up shall be completely automatic. 16410 - 18 December 2004 SECTION 16410 415 HZ POWER SYSTEM 8. Voltage Adjustment: The output voltage shall be capable of being adjusted over a minimum range of plus or minus 100% from rated voltage. 9. Voltage Regulation: A generator voltage regulator shall be provided and installed in the control panelboard. The regulator shall be a voltage sensing static type with no electrolytic capacitors or electronic tubes. The regulator shall be equipped with a control for manual adjustment of the generator voltage level to +/-10 percent of generator rated voltage. The regulator shall provide excitation control necessary to maintain the adjusted generator output voltage over a load of zero to 100% of the generator capacity at rated frequencies. 10. Voltage Steady State Stability: Steady state voltage stability shall be plus or minus ½ of one percent at any load from no load to and including full rated load. 11. Voltage Transient Limits: Upon sudden application or removal of full rated load at rated power factor, the output voltage shall not deviate more than plus or minus 15% from the preset value. 12. Voltage Recovery Time: Following instantaneous application or removal of 50% rated load, the output voltage shall recover to the regulation band within 0.2 seconds. 13. Phase Voltage Balance: The individual line-to-neutral voltages shall remain balanced within one percent under all balanced load conditions. With one-third rated current on any one phase and no load on the other two, maximum deviation of any phase voltage from the average the three phase voltages shall not exceed 4%. 14. Modulation: Voltage and frequency modulation shall not exceed 0.5%. 15. Harmonics: The maximum total harmonics shall not exceed 2.0% when measured line to line and line to neutral. The maximum single harmonic shall not exceed 1.5% of fundamental at the steady state voltage. E. Paralleling Equipment The motor generator set shall be capable of being paralleled to and disconnected from a common bus supported by MG sets having the same internal impedances, electrical characteristics, same voltage, and frequency. Provide cross-current compensation method of parallel operation. Paralleling and disconnecting of generators shall be possible while the bus in under load and shall share the load within 5% under all conditions from no-load to full-load at rated power factor. 16410-rev0 16410 - 19 December 2004 SECTION 16410 415 HZ POWER SYSTEM The MG set shall be equipped with all necessary paralleling equipment and switchgear with over voltage protection, shunt trip output circuit breaker and motor positioning controls. The paralleling system shall provide the necessary termination for the option of remote and local operation. Control panel lights associated with the paralleling system shall be push-to-test type. Manual paralleling shifting controls and synchronization indication shall be easily accessible to the operator placing two or more units on output bus. F. Control Instrumentation and Protective Devices 1. Input Circuit Breaker: Input circuit breaker shall be molded case, thermal magnetic type rated for 600 volts, 60 Hz, 3-phase, 3-wire and rated not more than 125% of the ultimate system load. It shall be equipped with a factory installed 24V DC shunt trip with coil clearing contact and shall provide internal thermal over current and instantaneous short circuit protection in each pole with a minimum interrupting capacity of, not less than, 22,000 symmetrical RMS amperes. It shall be identified with a nameplate. 16410-rev0 2. Motor Controller: Motor control shall be reduced voltage type, limiting the starting current to 150% of full load current and shall be equipped with thermal overload units. Controllers shall incorporate under voltage and over current protection and motor inrush current during start-up. Provision shall be made to permit remote operation. 3. Start-Stop Pushbutton: Pushbuttons shall be two single pushbuttons with “STOP” button palm size. “Motor On” light shall be provided on the front of the control panel. 4. Control Circuit Transformer: A transformer with fused primary and secondary shall be provided for operation of control and indicating devices. 5. Output Circuit Breakers: Output circuit breakers shall be manually operated, rated for 600 volts, 415 Hz, 3-phase, 3-wire. It shall be tripped by overload and short circuit protection with auxiliary shunt trip capability specifically rated and calibrated for use on 415 Hz circuits and shall show nameplate information to this effect on the manufacturer’s name plate. 16410 - 20 December 2004 SECTION 16410 415 HZ POWER SYSTEM 6. Output UNDERVOLTAGE Protection: The output UNDERVOLTAGE protection system shall operate the shunt trip in the output circuit breaker, illuminate a push-to-test fault indicating light and provide for manual reset. The UNDERVOLTAGE protection shall operate at no less than 75% of rated 415 Hz output voltage with very inverse time characteristics. 7. Output UNDERVOLTAGE Protection: The output UNDERVOLTAGE protection system shall operate the shunt trip in the output circuit breaker, illuminate a push-to-test fault indicating light and provide for manual reset. The UNDERVOLTAGE protection shall operate with very inverse time characteristics when the output voltage exceeds 110% of the rated 415 Hz output voltage, from an average sensing of the three phase voltages. 8. Circuit Breaker Shunt Trip Operation: The operator of the shunt trip devices shall inhibit circuit breaker operation from transient voltage excursions caused by adding or dropping 100% rated load. 9. Load-On Indicating Light: The MG set shall be provided with a “load-on” push-to-test” light to indicate that the output circuit breaker is closed and that output power is available. 10. Indicating Meters: Provide voltmeter, ammeter, and frequency meter (1.0% accuracy) for 415 Hz service. The voltmeter and ammeter shall each be provided with a phase selector switch mounted on the control panel for phase monitoring. Ammeter scale shall read the full load output of the generator in the upper third of the scale. The voltmeter scale shall provide reading for at least 10% over-voltage. 11. Elapsed Time Meter: An elapsed time meter with a 99,999-hour, five digit scale shall be provided on the control panel indicting the total operating time of the motor-generator set. G. Alarm and Safety Devices Each MG set shall have, as a minimum, the following devices, controls and alarms: Conditions 1 2 3 4 5 16410-rev0 Low Oil Level High Winding Temp Output Breaker Tripped Overload (400 Hz) Fault (400 Hz) 16410 - 21 Alarm Simultaneous Control Actions Annunciated Alarm Annunciated Alarm Annunciated Alarm M-G shut down Annunciated Alarm Annunciated Alarm M-G shut down M-G shut down December 2004 SECTION 16410 415 HZ POWER SYSTEM 6 7 8 High Top Bearing Temp High Lower Bearing Temp Paralleling Failure Annunciated Alarm Annunciated Alarm Annunciated Alarm Shutdown of the problem M-G set shall automatically bring the next available M-G set “on-line”. H. Environmental Conditions The motor generator sets shall operate satisfactorily at rated threephase loads under the following conditions: I. 410.04 16410-rev0 1. Ambient temperatures ranging from 0 to +40C when operating. 2. Ambient storage temperature ranging from -25C to +55C. 3. Relative humidity up to 95 percent. Miscellaneous Requirements 1. Nameplates: All controls, instrumentation, and indicator lights shall be permanently and legibly identified with suitable words, phrases, or abbreviations thereof to indicate the use or purpose of the part. The marking may be on the part itself, or on the visible surface adjacent to the part. Nameplates shall be engraved plastic laminate or engraved or machine stamped metal. 2. Identification: A metal nameplate not exceeding 5 inches by 6 inches shall be permanently attached by the manufacture at a convenient location on the outside of the unit. Nameplate information shall include manufacturer’s name and code identification number, required input and output voltage, frequency and current at full load, output KVA rating and the total weight. 3. Terminal Blocks: Suitable clearly and permanently labeled terminal blocks which are readily accessible for qualified personnel shall be included in each separately mounted unit for all interconnecting wiring and for the 480 V power supply and 208 V load connections. 4. Display: Readily-readable copies of the motor, generator, control and 415 Hz distribution schematics shall be posted inside the control panel doors and covered with ¼-inch plexiglass shields. Manufacturer shall leave ample space for the distribution schematics to be added in the field. DESCRIPTION OF 415 HZ DISTRIBUTION EQUIPMENT 16410 - 22 December 2004 SECTION 16410 415 HZ POWER SYSTEM 410.05 A. Provide distribution equipment including feeders, distribution panels, branch circuit wiring and computer equipment connections as specified herein and as shown on the Drawings. B. The distribution panels shall be centrally located in the computer room among the 415 Hz computer equipment and shall be suitable for operation at 415 Hz. The panels and circuit breakers shall be rated for 240 volts, 415 Hz, 3-phase, 3-wire, and shall be specially calibrated to respond to available short circuit current at 415 Hz. C. Each circuit breaker shall be molded case, bolt-on type with internal thermal over current and instantaneous short circuit protection in each pole. D. The computer equipment connection shall include a heavy duty, nonfusible type disconnect switch and a water tight special purpose receptacle to match the computer equipment plug configuration. E. Feeder or branch circuit wiring shall be copper conductors with THWN insulation in rigid aluminum conduits. INSTALLATION OF STATIC FREQUENCY CONVERTER A. The static frequency converter shall be installed in a properly ventilated, air-conditioned, and acoustically treated room in accordance with the manufacturer’s recommendations and as shown on the Drawings. Manufacturer’s field service shall be provided to place the static frequency converter equipment in operation. B. Equipment shall be installed free of moisture and dirt. Interconnection wiring shall comply with the National Electrical Code and ANSI. The batteries shall be seismically anchored to the floor with secondary containment. Bolt connectors shall be stainless steel with electrolyte resistant coating after making the connections. C. 16410-rev0 D. The following procedures, as a minimum, shall be performed by the manufacturer’s field service engineer during the course of the static frequency converter system start-up. E. Visual Inspection 1. Visually inspect all equipment for sings of damage and/or foreign material. 2. Check all battery cells for proper electrolyte levels. 3. Observe type of ventilation, room cleanliness, use of proper signs and any safety related items that may be noteworthy. 4. Check for proper cell numbering. 16410 - 23 December 2004 SECTION 16410 415 HZ POWER SYSTEM F. 5. Check for proper cell interconnections relative to polarity throughout the battery. 6. Check all cell tops for cleanliness. Mechanical Inspection 1. Check all power connections for tightness. 2. Check all control wiring terminations and plugs for tightness and/or proper seating. 3. Check to see that all subassembly parts are secure. 4. Check torque on battery cell posts. G. Electrical Precheck H. I. 16410-rev0 1. Check system for grounds. 2. Check DC bus for short circuits. 3. Check input power for proper voltages and phase rotation. 4. Check and adjust, if necessary, all power supply voltages. 5. Check all lamp test functions. Initial Unit Start-Up 1. Verify that all alarms are in a “go” condition. 2. Energize unit and verify proper DC start-up, and AC phase on. 3. Check DC link holding voltage, AC output voltages, and output waveforms. 4. Check final DC link voltage and invertor AC output. Adjust if required. 5. Check for proper paralleling. System Protection Settings 1. Check battery discharge. 2. Check DC UNDERVOLTAGE warning. 3. Check DC over voltage and DC UNDERVOLTAGE trip. 4. Check AC over voltage and AC UNDERVOLTAGE trip. 16410 - 24 December 2004 SECTION 16410 415 HZ POWER SYSTEM 5. J. K. L. Simulate leg fuse blown. Batteries 1. Check all control battery terminations.. 2. Check for proper control of battery. Waveforms 1. Check DC line ripple. 2. Check all leg quasi-square waves. 3. Check invertor output waveform. System Check After Load Commitment to the System 1. Check AC input current. 2. Check charger output current. 3. Check DC link voltage. 4. Check invertor output voltage and waveform. 5. Check invertor output current, 6. Check input voltage waveforms. 7. Verify remote monitor operation. 8. Simulate utility outages. 9. Perform 2-minute battery run. Verify no abnormal heating of battery connections. 10. Verify proper charger current limit setting. 11. Check and record voltage of all cells in the battery. Also check and record the specific gravity of all sells that have a voltage of more than 0.04V below the average cell voltage for the entire battery. 12. Verify selective trip functions. 13. Adjust LDC. M. Operational Training 16410-rev0 16410 - 25 December 2004 SECTION 16410 415 HZ POWER SYSTEM Prior to leaving the site, the manufacturer field service engineer shall familiarize responsible personnel with the operation of the system. The system equipment shall be available for demonstration of the operation modes. Training shall be one day minimum. 410.06 410.07 16410-rev0 INSTALLATION OF MOTOR GENERATOR SET A. Installation shall conform to the NEC and shall be in strict accordance with manufacturer’s instructions and as shown on the Drawings. Manufacturer’s field services shall be provided to place the motor generator set and making necessary adjustments and start-up to ensure optimum operation. Motor generator set shall be installed in a room that is designed to attenuate the noise produced by the set, and shall be ventilated in accordance to manufacturer’s instruction. B. Mount motor generator set on concrete slab. The top of the concrete slab shall be approximately 4 inches above ½ inch chamfer. The slab shall be of adequate size to project at least 8 inches beyond the equipment. C. Provide anchor bolts and sleeves for installation of the unit on concrete foundation. Anchor bolts and sleeves shall be type size, and metallurgy recommended by the manufacturer of the MG set. Placement of anchor bolts and sleeves for the motor generator set shall be in strict accordance with details provided by the manufacturer of the MG set. D. Provide vibration isolators to isolate vibrations from the MG set to the foundation. Type, number, and arrangement of the isolators shall be as recommended by the manufacturer of the MG set. E. MG set shall be grounded in accordance with the National Electrical Code. INSTALLATION OF 415 HZ DISTRIBUTION EQUIPMENT A. A 415 Hz distribution panel shall be centrally located in the computer room among the 415 computer equipment to ensure that the voltage drop from this distribution panel to any 415 Hz computer equipment does not exceed 2%. B. The feeder from the frequency converting equipment to the 415 Hz distribution panel shall be sized to limit the voltage drop to 2% maximum. C. Feeder and branch circuit wiring shall be copper conductors with THW or THWN insulation in aluminum conduits. Steel conduits shall not be used. D. Voltage drop calculations shall be done in accordance with the following formulas and tables: 16410 - 26 December 2004 SECTION 16410 415 HZ POWER SYSTEM 1. Effective Resistance R’ = KR (formula 1) /1/ R’ = R = Where: x = Where: effective resistance in ohms true resistance with continuous current in ohms K = skin effect ratio as determined from Table 1 in terms of x 0.063598 (fM/R) ½ (Formula 2) /1/ f = M = R = Example: frequency in cycles per second magnetic permeability of conductor; M=1 for copper conductor DC resistance at operating temperature in ohms per mile Determine the resistance of a 250 MCM copper conductor at 415 Hz From Table 8 of National Electrical Code (NEC) R = 0.0515 OHM = 0.0510 MFT OHM x 5.28 MFT MFI = 0.2719 OHM MI MI Therefore, x = 0.073598 x (415 Hz x 1/0.2719 OHM) ½ = 2.48 MI /1/ Donald G. Fink and H. Wayne Beaty - Standard Handbook for Electrical Engineers, Eleventh Edition, pp. 4-27 From Table 1, K = 1.163 Therefore, R’ = KR = 1.163 x 0.515 OHM = 0.0599 OHM MFT MFT 16410-rev0 TABLE 1 SKIN-EFFECT RATIOS (Bur. Std. Bull. 169, pp. 226-228) X K X K 0 1 2.9 1.28644 0.1 1 3 1.31809 0.2 1.00001 3.1 1.35102 0.3 1.00004 3.2 1.38504 0.4 1.00013 3.3 1.41999 X 6.6 6.8 7 7.2 7.4 K 2.60313 2.67312 2.74319 2.81334 2.88355 17 18 19 20 21 K 6.26817 6.62129 6.97446 7.32767 7.68091 0.5 0.6 0.7 0.8 7.6 7.8 8 8.2 2.95389 3.02411 3.09445 3.1648 22 23 24 25 8.03418 8.38748 8.74079 9.09412 1.00032 1.00067 1.00124 1.00212 3.4 3.5 3.6 3.7 1.4557 1.49902 1.52879 1.56587 16410 - 27 X December 2004 SECTION 16410 415 HZ POWER SYSTEM TABLE 1 SKIN-EFFECT RATIOS (Bur. Std. Bull. 169, pp. 226-228) X K X K X 0.9 1.0034 3.8 1.60314 8.4 K 3.23518 26 K 9.44748 1 1.1 1.2 1.3 1.4 1.00519 1.00758 1.01071 1.0147 1.01969 3.9 4 4.1 4.2 4.3 1.64051 1.67787 1.71516 1.75233 1.78933 8.6 8.8 9 9.2 9.4 3.30557 3.37597 3.44638 3.5168 3.58723 28 30 32 34 36 10.???? 10.88888 11.56785 12.27471 12.9816 1.5 1.6 1.7 1.8 1.9 1.02582 1.03323 1.04205 1.0524 1.0644 4.4 4.5 4.6 4.7 4.8 1.82614 1.86275 1.89914 1.93533 1.97131 9.6 9.8 10 10.5 11 3.65766 3.72812 3.79857 3.97477 4.151 38 40 42 44 46 13.68852 14.39545 15.1024 15.80936 16.51634 2 2.1 2.2 2.3 2.4 1.07816 1.09375 1.11126 1.13069 1.15207 4.9 5 5.2 5.4 5.6 2.0071 2.04272 2.11353 2.18389 2.25393 11.5 12 12.5 12 13.5 4.32727 4.50358 4.67993 4.85031 5.03272 48 50 60 70 80 17.22333 17.93032 21.46541 25.00063 28.53593 2.5 2.6 2.7 2.8 1.17538 1.20056 1.22753 1.2562 5.8 6 6.2 6.4 2.3238 2.39359 2.46338 2.53321 14 14.5 15 16 5.20915 5.3856 5.56208 5.915 90 100 32.07127 35.60666 2. X Effective Reactance X = 2 fL (Formula 3) f’ L Where: = = frequency in cycles per second induction of conductor Assuming induction of conductor at 60 Hz and 415 Hz is the same, then X 415 = Example: 415 X 60 = 6.917 X 60 (Formula 4) 60 Determine the reactance of a 250 MCM copper conductor at 415 Hz In nonmagnetic duct, X 60 = 0.0396 OHM (from IEEE Std. 241-1983) MFT Therefore, X 415 = 6.917 X 60 = 0.274 OHM MFT 16410-rev0 16410 - 28 December 2004 SECTION 16410 415 HZ POWER SYSTEM 3. Voltage Drop Calculation V = 1.732 I (R Cos 0 + X Sin 0) (Formula 5) (from IEEE Std. 1411976) Where: V = I = R = X = O = Cos O Sin O voltage drop in circuit, 3-phase line to line current flowing in conductor line resistance for one conductor, in ohms line reactance for one conductor, in ohms angle whose cosine is the load power factor = load power factor, in decimals = load reactive factor, in decimals Example: Determine the voltage drop f a three phase circuit with 250 MCM copper conductors in aluminum conduit, 200 ft. circuit length and 50 amp load at 70 percent power factor. From calculations done in 1. and 2. above. R = 0.0599 OHM MFT X = 0.274 OHM MFT 0 = ARC Cos (0.7) = 45.57C Sin 0 = 0.71 Therefore, V = = E. 1.732x50x(0.0599x200x0.7+0.274x200x0.71 1000 1000 4.1 volts = 4.1/208 x 100% = 1.97% Minimum size of feeder or branch circuit conductor shall be 250 MCM copper. Each circuit shall be provided with an insulated ground conductor, to be the same size as phase conductors. Table 2 provides a summary of circuit length calculations based on a 2% maximum feeder or branch circuit voltage drop and a load power factor of 76.6% of a typical 415 Hz HGST computer equipment. Copper Wire Size 16410-rev0 X OHM/MFT R OHM/MFT Load AMP Conduit Size (4) 250 MCM 0.274 0.0599 100 150 200 2-1/2" (8) 250 MCM 0.137 0.03 100 3-1/2" 16410 - 29 Maximum Circuit Length (Feet) 108 72 54 216 December 2004 SECTION 16410 415 HZ POWER SYSTEM 150 200 300 400 410.08 16410-rev0 144 108 72 54 (4) 350 MCM 0.272 0.0477 100 150 200 300 3" 112 75 56 37 (8) 350 MCM 0.136 0.0239 100 150 200 300 400 500 4" 227 151 113 76 57 45 (4) 500 MCM 0.258 0.0386 100 150 200 300 3-1/2" 123 82 61 41 (8) 500 MCM 0.129 0.0193 100 150 200 300 400 500 600 (2) 31/2" 246 164 123 82 61 49 41 SYSTEM TESTING A. The 415 Hz power system equipment shall be factory tested in accordance with the manufacturer’s standard testing procedures. A test report showing that the equipment has passed the factory tests and has demonstrated the full output ratings required by this Specification shall be submitted seven calendar days prior to delivery of the equipment. B. After installation has been completed, the Contractor and the manufacturer’s field service engineer shall arrange with HGST’s designated representative to conduct an operating test. All equipment shall be tested and demonstrated to operate in accordance with the requirements of this Section and manufacturer’s specifications. One day operating test shall be conducted under supervision of the manufacturer’s field service engineer. This test may be witnessed by HGST’s Engineer at his option. C. All circuits shall be tested for continuity. The circuits shall then be checked to ascertain that it is free of grounds. D. Equipment shall also be tested to verify that: 16410 - 30 December 2004 SECTION 16410 415 HZ POWER SYSTEM 1. System starts up properly and in accordance with the manufacturer’s start-up procedure. 2. Paralleling equipment is functioning properly. 3. Output power is within specified limits. 4. Output frequency is within specified limits. 5. Output voltage is within specified limits. 6. Sound levels are within specified limits. 7. Metering devices operate as specified. 8. Warning lights, controls, and alarms operate as specified. ***END OF SECTION 16410*** 16410-rev0 16410 - 31 December 2004