Design Strategy for a 3-Phase Variable Frequency Drive (VFD)
... These motor drives are designed to be used in conjunction with a 3-phase induction motor. Because these motors typically only have an on/off state of operation, a VFD is needed if multiple operation speeds are desired. Also, apart from selectable speeds, the efficiency of the overall system is incre ...
... These motor drives are designed to be used in conjunction with a 3-phase induction motor. Because these motors typically only have an on/off state of operation, a VFD is needed if multiple operation speeds are desired. Also, apart from selectable speeds, the efficiency of the overall system is incre ...
How to Increase Output Current Capability
... 2. Both converters use the same reference voltage. However due to external resistor tolerances, each regulated output voltages are different. We can take the assumption that channel 1 regulates at the high end of its tolerance while channel 2 regulates at the low end. ...
... 2. Both converters use the same reference voltage. However due to external resistor tolerances, each regulated output voltages are different. We can take the assumption that channel 1 regulates at the high end of its tolerance while channel 2 regulates at the low end. ...
www.BDTIC.com/TI Live Insertion SDYA012 October 1996
... an electronic telephone exchange, the switching control center of an electric utility, or the computer that processes data in the air-traffic control center of an airport. In all of these cases, when a fault is found in a module, exchanging this module in a running system without disturbing or other ...
... an electronic telephone exchange, the switching control center of an electric utility, or the computer that processes data in the air-traffic control center of an airport. In all of these cases, when a fault is found in a module, exchanging this module in a running system without disturbing or other ...
EUP8092 1.5A Linear Li-Ion/Polymer Charger IC with Integrated FET and Charger Timer
... Li-Ion/Polymer battery charger IC designed for handheld devices. This charger is designed to work with various types of AC adapters or a USB port and capable of operating with an input voltage as low as 2.65V. The EUP8092 operates as a linear charger and charges the battery in three phases: trickle ...
... Li-Ion/Polymer battery charger IC designed for handheld devices. This charger is designed to work with various types of AC adapters or a USB port and capable of operating with an input voltage as low as 2.65V. The EUP8092 operates as a linear charger and charges the battery in three phases: trickle ...
Series LCM-9.cdr - Signtex Lighting
... If more than (9) circuits are required to be monitored and are located in a single or nearby panelboard, the standard model MASTER LCM may be connected to up to (2) REMOTE LCM panels, each of which can monitor up to (8) circuits. This allows up to (25) circuits to be monitored with only one 12V sign ...
... If more than (9) circuits are required to be monitored and are located in a single or nearby panelboard, the standard model MASTER LCM may be connected to up to (2) REMOTE LCM panels, each of which can monitor up to (8) circuits. This allows up to (25) circuits to be monitored with only one 12V sign ...
Development and Implementation of Composite Load Model in WECC
... voltage regulators have 33 taps (0 +/–16) with each tap step 5/8%. This translates into +/–10% regulation range. Substation voltage is typically controlled to 124 V (on 120V secondary voltage base) with regulation dead-band of 2 to 2.5V. California utilities use Conservation Voltage Reduction (CVR) ...
... voltage regulators have 33 taps (0 +/–16) with each tap step 5/8%. This translates into +/–10% regulation range. Substation voltage is typically controlled to 124 V (on 120V secondary voltage base) with regulation dead-band of 2 to 2.5V. California utilities use Conservation Voltage Reduction (CVR) ...
2002 NEC Code Changes
... Ampacity in accordance with 310.15 and 310.60 Transformers – conductors supplying transformers shall not be less than the nameplate rating of the transformer Transformers and utilization equipment - Size conductors at not less than 125% of the “designed potential load” of equipment plus the nameplat ...
... Ampacity in accordance with 310.15 and 310.60 Transformers – conductors supplying transformers shall not be less than the nameplate rating of the transformer Transformers and utilization equipment - Size conductors at not less than 125% of the “designed potential load” of equipment plus the nameplat ...
65 AMPSSoHo USER GUIDE
... Always make sure the AC Voltage Selector is set for the proper voltage (120 volts in the U.S) before turing on the amplifier! Always make sure the amplifier is grounded! (3-prong connector - no ground lifts). Use only a high quality grounded 3-prong AC power cable with this unit. Always look for bre ...
... Always make sure the AC Voltage Selector is set for the proper voltage (120 volts in the U.S) before turing on the amplifier! Always make sure the amplifier is grounded! (3-prong connector - no ground lifts). Use only a high quality grounded 3-prong AC power cable with this unit. Always look for bre ...
Single and two piece AC Hipots
... Choke coils are incorporated into the CTVT to help maintain phase balance. ...
... Choke coils are incorporated into the CTVT to help maintain phase balance. ...
GS7200A 07/13/06 POWER DELEGATOR SERIES 7200A POWER
... The following specification describes the features, design, and application of the Series 7200A Line Conditioning and Power Distribution Unit (PDU). All systems shall be designed and manufactured to assure maximum reliability, flexibility, serviceability and performance. The overall function of the ...
... The following specification describes the features, design, and application of the Series 7200A Line Conditioning and Power Distribution Unit (PDU). All systems shall be designed and manufactured to assure maximum reliability, flexibility, serviceability and performance. The overall function of the ...
Isolated sensing systems with low power consumption
... ing, the common-mode voltage of the shunt resistors can be either near the full DC-Link voltage or near ground potential. In order to take advantage of a design using isolated delta-sigma modulators, each of the seven monitoring circuits require a start by producing 3.3 VDC from the 48-VDC source wi ...
... ing, the common-mode voltage of the shunt resistors can be either near the full DC-Link voltage or near ground potential. In order to take advantage of a design using isolated delta-sigma modulators, each of the seven monitoring circuits require a start by producing 3.3 VDC from the 48-VDC source wi ...
Fixed Power Factor Correction Capacitors, with
... Provide industry standard brand fuses that are completely accessible and replaceable. Inaccessible fuse links are not acceptable. ...
... Provide industry standard brand fuses that are completely accessible and replaceable. Inaccessible fuse links are not acceptable. ...
New Design of High Performance 2:1 Multiplexer
... innovative developments in low power VLSI design during recent years. The driving forces behind these developments are portable device applications requiring low power consumption and high throughput due to their small chip size with large density of components, increased complexity and high frequen ...
... innovative developments in low power VLSI design during recent years. The driving forces behind these developments are portable device applications requiring low power consumption and high throughput due to their small chip size with large density of components, increased complexity and high frequen ...
B. Doubly Fed Induction Generator.
... power system than for other systems. WECS can be broadly divided between fixed speed and variable speed devices. Fixed speed devices consist of asynchronous generators directly connected to the grid, while variable speed machines are connected through an electronic interface. The first type is simpl ...
... power system than for other systems. WECS can be broadly divided between fixed speed and variable speed devices. Fixed speed devices consist of asynchronous generators directly connected to the grid, while variable speed machines are connected through an electronic interface. The first type is simpl ...
How to Bias an Op-Amp
... Voltage Divider Biasing: This method is particularly useful when you have a number of op-amps which need to be biased to the same voltage, as you can create a single bias voltage that they will all use. For DC coupled amplifiers, it is important to remember that R1 and R2 must be much, much smaller ...
... Voltage Divider Biasing: This method is particularly useful when you have a number of op-amps which need to be biased to the same voltage, as you can create a single bias voltage that they will all use. For DC coupled amplifiers, it is important to remember that R1 and R2 must be much, much smaller ...
The unified power quality conditioner: the integration of series and
... The circuit constants of the 10-kVA shunt-passive filter are shown in Table I. The filter consists of 5th- and 7thtuned filters and a high-pass filter for the purpose of harmonic compensation of the 20-kVA 12-pulse thyristor rectifier. The 12-pulse thyristor rectifier practically produces a nonnegli ...
... The circuit constants of the 10-kVA shunt-passive filter are shown in Table I. The filter consists of 5th- and 7thtuned filters and a high-pass filter for the purpose of harmonic compensation of the 20-kVA 12-pulse thyristor rectifier. The 12-pulse thyristor rectifier practically produces a nonnegli ...
Voltage recovery after unbalanced and balanced voltage dips in
... voltages [1], [2]. Voltage dips are due to short-duration increases in current elsewhere in the power system. The main causes of voltage dips are faults, motor starting, and transformer energizing. A voltage dip at the terminals of equipment may lead to maloperation of the equipment. Most maloperati ...
... voltages [1], [2]. Voltage dips are due to short-duration increases in current elsewhere in the power system. The main causes of voltage dips are faults, motor starting, and transformer energizing. A voltage dip at the terminals of equipment may lead to maloperation of the equipment. Most maloperati ...
Hybrid Tube Amp Design
... a cathode bias could be utilized similar to that used in. [1] The amplified output from the surround processor is fed into a transfer switch matrix made up of U2 and U3, which are analog devices, ADG333A analog switches. It was observed while testing an earlier design that small signal relays used i ...
... a cathode bias could be utilized similar to that used in. [1] The amplified output from the surround processor is fed into a transfer switch matrix made up of U2 and U3, which are analog devices, ADG333A analog switches. It was observed while testing an earlier design that small signal relays used i ...
Electrical substation
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels.Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control.A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. The word substation comes from the days before the distribution system became a grid. As central generation stations became larger, smaller generating plants were converted to distribution stations, receiving their energy supply from a larger plant instead of using their own generators. The first substations were connected to only one power station, where the generators were housed, and were subsidiaries of that power station.