Protective Devices Maintenance as it Applies to the Arc/Flash
... This value of 1.89431 cal/cm2 is based on a single-phase arc in open-air. As a general rule of thumb, the value of 1.89431 would be multiplied by a factor of 2 for a singlephase arc in a box (2 x 1.89431 = 3.78862 cal/cm2 – Category 1) and by a factor of 3.4 for a multi-phase arc in a box (3.4 x 1.8 ...
... This value of 1.89431 cal/cm2 is based on a single-phase arc in open-air. As a general rule of thumb, the value of 1.89431 would be multiplied by a factor of 2 for a singlephase arc in a box (2 x 1.89431 = 3.78862 cal/cm2 – Category 1) and by a factor of 3.4 for a multi-phase arc in a box (3.4 x 1.8 ...
Current - PHS Regents Physics
... point can be written with units of __________________ elementary charges, e or __________________________________ . The conversion from one unit to the other is found on pg 1 of PhysRT: 6.25 x 1018 1 C = _______________________ e 1.60 x 10-19 or 1 e = ________________________ C Ex. ...
... point can be written with units of __________________ elementary charges, e or __________________________________ . The conversion from one unit to the other is found on pg 1 of PhysRT: 6.25 x 1018 1 C = _______________________ e 1.60 x 10-19 or 1 e = ________________________ C Ex. ...
trade : boilermaker
... equipment that must be used). Connect three phase and three single phase transformers in various combinations to obtain various voltages. Before commissioning test the following AC machines electrically and mechanically: After commissioning fault find the following AC machines: Capacitor start motor ...
... equipment that must be used). Connect three phase and three single phase transformers in various combinations to obtain various voltages. Before commissioning test the following AC machines electrically and mechanically: After commissioning fault find the following AC machines: Capacitor start motor ...
Newsletter
... are applied to the highest quality standards and correct specification to ensure optimum performance of your vessel in service. ► Lifting gear testing. We help ship operators understand the importance of good maintenance, what happens during the examination of lifting appliances and what is required ...
... are applied to the highest quality standards and correct specification to ensure optimum performance of your vessel in service. ► Lifting gear testing. We help ship operators understand the importance of good maintenance, what happens during the examination of lifting appliances and what is required ...
Function tests of assembled circuit boards using
... Infrared cameras are used for accurate thermal analysis on electronic components, e.g. in cases where not only one critical component exists or the component can not be clearly defined. Weak points can be localized by the camera through the demonstration of thermal images. A detailed real time analy ...
... Infrared cameras are used for accurate thermal analysis on electronic components, e.g. in cases where not only one critical component exists or the component can not be clearly defined. Weak points can be localized by the camera through the demonstration of thermal images. A detailed real time analy ...
GCB-3424-L2x(D)
... TX Fault is an open collector/drain output, which should be pulled up with a 4.7K–10kΩ resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind either in Channel 1 or Channel 2. The Host shall read Channel 1/2:A2H/AAH: 110 for ...
... TX Fault is an open collector/drain output, which should be pulled up with a 4.7K–10kΩ resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind either in Channel 1 or Channel 2. The Host shall read Channel 1/2:A2H/AAH: 110 for ...
You are required to lead a lab activity with the class
... Everyone should already have the parts they need and a circuit diagram handout. Pull up the circuit diagram on the projector. Step the students through the wiring process one step at a time. Make sure almost everyone is caught up before continuing. First start by explaining how to use the rails or b ...
... Everyone should already have the parts they need and a circuit diagram handout. Pull up the circuit diagram on the projector. Step the students through the wiring process one step at a time. Make sure almost everyone is caught up before continuing. First start by explaining how to use the rails or b ...
ABSOLARE Bybee Purifier User Manual
... There is no power switch on the unit, mains voltage will be available at output outlets as soon as the input power is connected. If the total current drawn from the outlets exceeds 12 amperes, the circuit breaker on back of the unit is tripped. In that case you should unplug the faulty unit and push ...
... There is no power switch on the unit, mains voltage will be available at output outlets as soon as the input power is connected. If the total current drawn from the outlets exceeds 12 amperes, the circuit breaker on back of the unit is tripped. In that case you should unplug the faulty unit and push ...
CONTROL
... Sometimes it is necessary to increase the current in a circuit. This is especially important if a sensor is being used as an input. For example, a temperature sensor may to used to detect fire and then to turn on a water sprinkler system to put the fire out. Look at the example below. When the rise ...
... Sometimes it is necessary to increase the current in a circuit. This is especially important if a sensor is being used as an input. For example, a temperature sensor may to used to detect fire and then to turn on a water sprinkler system to put the fire out. Look at the example below. When the rise ...
REC15_AL / REC25_AL
... Off-line system designed with Network editor allowing users to make the electrical scheme of a network. Network elements such as lines, sources, reclosers, transformers, fuses, loads etc. with their parameters can be mapped in the scheme. Once the network data have been entered it is possible to find ...
... Off-line system designed with Network editor allowing users to make the electrical scheme of a network. Network elements such as lines, sources, reclosers, transformers, fuses, loads etc. with their parameters can be mapped in the scheme. Once the network data have been entered it is possible to find ...
Diagnostic of CT Failure – Same Location, different Phase
... 2011 on phase T and resulted in a black out in the Panakukang area. This incident has caused the total energy loss of 60 MVA. Visual inspection showed normal temperature conditions at the top of the current transformer (upper core), and field investigation did not reveal the presence of any open sec ...
... 2011 on phase T and resulted in a black out in the Panakukang area. This incident has caused the total energy loss of 60 MVA. Visual inspection showed normal temperature conditions at the top of the current transformer (upper core), and field investigation did not reveal the presence of any open sec ...
Example - s3.amazonaws.com
... Recall for a generator that VL = Vp. So analyzing the - system is similar to analyzing the Y- system except that the line voltages are more easily found. Example: Determine the three line currents for a - system that has a balanced generator with 240 V RMS and a negative phase sequence. The l ...
... Recall for a generator that VL = Vp. So analyzing the - system is similar to analyzing the Y- system except that the line voltages are more easily found. Example: Determine the three line currents for a - system that has a balanced generator with 240 V RMS and a negative phase sequence. The l ...
Period 14 Activity Sheet: Electrical Safety and Transmission
... Fuse Demonstration with a Short Circuit Connect a piece of solder and a four bulb tray in series to a step-down transformer using connecting wires. Solder is thin wire with a low melting point that represents a fuse in this activity. The transformer lowers the voltage to a safe level. A Solder Trans ...
... Fuse Demonstration with a Short Circuit Connect a piece of solder and a four bulb tray in series to a step-down transformer using connecting wires. Solder is thin wire with a low melting point that represents a fuse in this activity. The transformer lowers the voltage to a safe level. A Solder Trans ...
SBP-64X Digital Processor Owner`s Reference
... Suggestion:Checkall connections IN and OUTfrom the processor. Checkall powerconnections.Makecertain that the powersupplyis switchedinto the ON or UPposition. Haveyou selected the correct source on your preamp?Check the front panelLED’sfor powersupplystability. If youstill haveno sound,turn off the p ...
... Suggestion:Checkall connections IN and OUTfrom the processor. Checkall powerconnections.Makecertain that the powersupplyis switchedinto the ON or UPposition. Haveyou selected the correct source on your preamp?Check the front panelLED’sfor powersupplystability. If youstill haveno sound,turn off the p ...
Strobes N More EFlood Warning Lightbar
... wiring or circuit protection causes the warranty to be void. Applying voltage directly to the LEDs will cause immediate failure and void the warranty. Damages resulting from improper use and/or accidents are not covered by this warranty. Aluminum will corrode if left in the elements or area of high ...
... wiring or circuit protection causes the warranty to be void. Applying voltage directly to the LEDs will cause immediate failure and void the warranty. Damages resulting from improper use and/or accidents are not covered by this warranty. Aluminum will corrode if left in the elements or area of high ...
Loop Selective Direction Measurement for Distance Protection
... The response if the same fault is applied to a 7SA522 relay is shown in Fig. 7 below. The relay response dynamically follows the evolving fault: The reverse fault in ph L2 is detected correctly. As shown in Fig. 8 below, the current in phase L2 clearly leads the voltage (faulted loop voltage uL2 in ...
... The response if the same fault is applied to a 7SA522 relay is shown in Fig. 7 below. The relay response dynamically follows the evolving fault: The reverse fault in ph L2 is detected correctly. As shown in Fig. 8 below, the current in phase L2 clearly leads the voltage (faulted loop voltage uL2 in ...
Buletin Stiintific - UPB - Seria C - numar 2 - 2006
... Large enterprises nowadays use complex integrated information systems for the management of their own resources: ERP (Enterprise Resource Planning) systems. During their use by a considerable large number of users, there are various situations when some perfomance components (such as response time) ...
... Large enterprises nowadays use complex integrated information systems for the management of their own resources: ERP (Enterprise Resource Planning) systems. During their use by a considerable large number of users, there are various situations when some perfomance components (such as response time) ...
RSB16F2
... are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no ...
... are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no ...
Lecture 1 - Digilent Inc.
... • Superficial introductions to necessary topics provided at the appropriate points during this course ...
... • Superficial introductions to necessary topics provided at the appropriate points during this course ...
Fault tolerance
Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of (or one or more faults within) some of its components. If its operating quality decreases at all, the decrease is proportional to the severity of the failure, as compared to a naively designed system in which even a small failure can cause total breakdown. Fault tolerance is particularly sought after in high-availability or life-critical systems.A fault-tolerant design enables a system to continue its intended operation, possibly at a reduced level, rather than failing completely, when some part of the system fails. The term is most commonly used to describe computer systems designed to continue more or less fully operational with, perhaps, a reduction in throughput or an increase in response time in the event of some partial failure. That is, the system as a whole is not stopped due to problems either in the hardware or the software. An example in another field is a motor vehicle designed so it will continue to be drivable if one of the tires is punctured. A structure is able to retain its integrity in the presence of damage due to causes such as fatigue, corrosion, manufacturing flaws, or impact.Within the scope of an individual system, fault tolerance can be achieved by anticipating exceptional conditions and building the system to cope with them, and, in general, aiming for self-stabilization so that the system converges towards an error-free state. However, if the consequences of a system failure are catastrophic, or the cost of making it sufficiently reliable is very high, a better solution may be to use some form of duplication. In any case, if the consequence of a system failure is so catastrophic, the system must be able to use reversion to fall back to a safe mode. This is similar to roll-back recovery but can be a human action if humans are present in the loop.