D4-VM30N

0 RELAY

This device measures 3 phase voltage signals and the line frequency.
A phase imbalance of more than 50V or phase reversal is indicated by “PH.ib” and “Ph.Er” respectively.
By changing the calibration setting, the readings may be adjusted from 90 – 110%.
Under normal conditions the average of all 3 phases is displayed. Every key-press of the “+” button 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.

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