Can smone tell me applications of a UVT(Under Voltage trip)?

Question

Give me firstly a brief of its functions then its industrial appl..

Answer 1

There is UVR _Under voltage release
and UVT - under voltage trip.

Both will open there respective circuits stopping equipment when the voltage drops below a safe operating limit. (Like during a brown out and power failure)

The difference bewteen them is what happens when the power rises back to notrmal or is restored from a power failure.

UVR - circuits remember they were turned on and automatically reconnect the circuit when proper power is reestablished

UVT - circuits trip on low voltage and stay off even after power has been restored. The UVT contactor will have to be manually reset and restarted.


UVT is used when the contactor is connected to a sensitive piece of equipment that cannot handle power spikes (rapid on/off/on events, or like an AC compressor cannot handle a restart under load until pressures equalize within the system)

UVR - would be used on critical equipment that would need to be restarted as quickly as possible and which will not be damaged by spiking or does not have a significant load to start against.
An example of this might be a condensate pump removing water from the hotwell of a steam turbine.

Answer 2

Under low voltage condition a lots of current Will pass through the equipment and burn it. So a low voltage tip switch or some kind of device will protect the equipment, by switching or shutting down....... stand by power can operate the equipment safely, and switch back as regular power is corrected.