VPD-04R Over and Under Voltage with Phase Sequence and Phase Failure Protection Relay


FEATURE DESCRIPTION
1. 35mm DIN Rail Installation.
2. phase failure protection.
3. phase sequence protection.
4. adjustable over voltage value 1.05×Un-1.3×Un.
5. adjustable under voltage value 0.7×Un-0.95×Un.
6. adjustable delay-on 0.1-20S
7. adjustable delay-off 0.1-20S
8. switch capacity 8 Amperes @250 V
9. switching contacts: 1Z(SPDT)
10. 3 phase and 1 neutral(VL-N:230VAC and VL-L: 400VAC)

General:

Microprocessor controlled. Three phase relay is used in systems exposed to over or under voltage, such as command, control or compensation systems and protects devices as condensers, motors, air conditioners and compressors. It is divided into sub-categories depending on the voltage adjustment range, on or off start modes.

Function description

When three-phase voltage is normal, the “OUT” LED flash seconds after the fault recovery time, setting by potentiometer “Ton”, “OUT” LED turns on, and relay is closed.
When any line voltage is over-voltage, over-voltage fault indicator “>Un” LED flash seconds, reaching the fault delay time which setting by “Toff”, relay disconnect, “OUT” LED turn off and Over-voltage failure indicator “>Un” LED is turn on. If power recover to normal in the fault delay time,
then relay and “OUT” LED are not act, still closed; When the over-voltage value is 1.3 times higher, without delay, relay immediately disconnect, Over-voltage failure “>Un” LED turns on.
When any line voltage is under-voltage, under-voltage fault indicator “<Un” LED flash seconds. Reaching the fault delay time witch setting by “Toff”, relay disconnect, “OUT” LED turn off and under-voltage indicator “<Un” LED turn on. If
power recover to normal in the faulte delay time,
then relay and “OUT” LED are not act, still closed; When the under-voltage value is 0.7 times lower, without delay, relay immediately disconnect, Over-voltage failure “<Un” LED turns on.
When phase sequence error of phase failure, the “OUT” LED turns off and relay immediately disconnect.
When the voltage recovers from the fault status to normal, the “OUT” LED flash seconds. fault recover time which is setting by “Ton” has reached, then relay close and output, “OUT” LED turn on; If over-voltage or under-voltage happen before the reaching of fault recovery time, then relay and “OUT” LED are not act, still disconnected; Over voltage or under voltage indicator light keeps on.

DESCRIPTION OF LED INDICATOR STATUS TURN ON TURN OFF FLASH

>Un <Un ON OUT DESCRIPTION
voltage and phase all normal, relay switch on
over-voltage happened, begin to delay but not reaching Toff, relay keeps on
over-voltage happened and delay reached Toff, relay switch off
from over-voltage recovery to normal, delay not reaching Ton, relay keeps off
from under-voltage recovery to normal, delay not reaching Ton, relay keeps off
under-voltage happened, begin to delay but not reaching Toff, relay keeps on
under-voltage happened and delay reached Toff, relay switch off
phase sequence error happened, delay one second, relay switch off