The high voltage cabinet has stored energy and the indicator light is off

Pearson Hybrid Safety and Service Procedures Flashcards

Rubber gloves should be worn whenever working on or near the high-voltage circuits or components of a hybrid electric vehicle. Technician says that the rubber gloves should be rated at 1000 volts or higher. Technician says that

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About The high voltage cabinet has stored energy and the indicator light is off

Set the main circuit breaker to the [OFF] position. Danger: Before beginning any work inside the control cabinet the High Voltage indicator light on the 320V Power Supply / Vector Drive must have been off for at least 5 minutes. Some service procedures can be dangerous or life-threatening.

What should always be done with any voltage indicator or tester before checking a circuit to see if it is energized? The voltage tester or indicator should be checked on a circuit that is known to be energized to verify it is operating correctly.

If the vector drive voltage indicator light is on, do not touch the electrical components. The high voltage in the control cabinet can kill you. Wait for the voltage indicator LED on the vector drive to go off completely.

The rates charged by the power company for the energy used are based on the readings of the meter registers and the____ indicators. high voltage Rate reductions are made by the power company when the metering measurements are taken on the ____ side of thetransformer.

Frequency Drive, Voltage Indicators illuminate whenever hazardous voltage or stored energy is present in the system. R-3W Series Voltage Indicators are suitable for both AC and DC applications from

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6 FAQs about [The high voltage cabinet has stored energy and the indicator light is off]

What should I do if my 320v power supply / vector drive is bad?

This decreases the risk of injury and mechanical damage. Set the main circuit breaker to the [OFF] position. Danger: Before beginning any work inside the control cabinet the High Voltage indicator light on the 320V Power Supply / Vector Drive must have been off for at least 5 minutes. Some service procedures can be dangerous or life-threatening.

What should a technician know before opening a mixed voltage cabinet?

As a technician or engineer begins work on electronic controls it is natural to maintain a narrow focus on the suspect low voltage equipment and controls and easily forget that work inside of a mixed voltage cabinet exposes workers to dangerous voltages and short-circuit currents. Before opening the cabinet door: Know the voltage levels present.

What is a 480 volt automation cabinet?

This automation cabinet contains power, control, and communication wiring. A 480-volt disconnect handle is at the upper right of the cabinet. PLCs near the top of the cabinet use 24-volt inputs and outputs to control a conveyor system while 480-volt VFD's near the cabinet bottom drive the conveyor motors.

How do I know if a 480 volt control cable is bad?

Check integrity of all control terminations and tighten terminal screws. Mixing higher voltage 480-volt three-phase cables in the same cabinet as lower voltage 24- or 120-volt control wiring can result in erratic operation or even complete failure.

How reliable are busbars in a high voltage substation?

Busbars are the part of the substation where all the power is concentrated from the incoming feeders, and distributed to the outgoing feeders. That means that the reliability of any high voltage substation depends on the reliability of the busbars present in the power system. An outage of any busbar can have dramatic effects on the power system.

What is a voltage indicator?

Typically hardwired to the load side of an electrical feeder or a disconnect switch, voltage indicators illuminate whenever hazardous voltage is present in any individual phase.