D4-VM32VN

2 RELAYS

This device incorporates independent voltage and frequency monitors.
Each function controls a separate relay.
In addition to providing OVER and / or UNDER voltage and frequency protection, this device will monitor phase failure, phase reversal and phase imbalance (neutral failure on “N” devices).
The voltage and frequency is monitored independently with separate upper and lower set-points.
A programmable start-up delay, reaction delay, hysteresis, phase imbalance limit and phase imbalance hysteresis is also included.
By changing the calibration setting, the readings may be adjusted from 90 – 110%.
The individual phase-to-phase voltages are monitored and can be viewed by pressing the “+” button. Every key-press cycles the display in the following order: the voltage between phase 1 and 2, then 1 and 3, then 2 and 3, line frequency and the average of all three phases.
Under normal conditions the average of all 3 phases is displayed.
Under fault conditions, the display indicates the offending phases using the left hand character, and the message “Hi” or “Lo”.
A phase imbalance or reversal is indicated by “PH.ib” or “Ph.Er”.
If the start-up or reaction delay is keeping the relay(s) energised during a fault condition, the display indicates “----“ as a warning.
A latch facility is also incorporated.

ADDITIONAL PROTECTION AGAINST:

• over / under voltage
• over / under frequency (VM32 only)
• loss of neutral (VM3x-N only)
• phase imbalance (phase to phase voltages)
• phase failure
• phase reversal
• phase angle error
• regenerated EMF

ADDITIONAL FEATURES INCLUDE:

• adjustable START-UP DELAY
• REACTION DELAY
• RECOVERY DELAY
• LATCH FACILITY to force mechanical reset after fault
• monitors own supply and frequency
• keypad lock with code

ADJUSTABLE PARAMETERS:

UPPER LIMIT : 150V - 500V

LOWER LIMIT : 150V - 500V

HYSTERESIS: 1V - 20V

PHASE IMBALANCE: 0V - 20V

PHASE IMBALANCE HYSTERESIS: 0V - 20V

FREQUENCY: 45Hz - 55Hz

START-UP DELAY: 0 - 99 seconds

REACTION DELAY (TRIPP DELAY): 0 - 99 seconds

RECOVERY DELAY (min relay off time: 0 - 99 seconds

ACCURACY:

 0.3% of full scale

CONTACT RATING:

 10A 250V AC

TECHNICAL INFORMATION:

• TRUE RMS by taking ± 150 readings per cycle
• all parameters are saved to non-volatile EEPROM memory, eliminating the need to re-program after power failure

LED INDICATION:

 relay status, ave of 3 phases, phase to phase V, frequency

Download User Manual Here