D4-VM12

2 RELAY

This device is used to measure and display true RMS AC voltage signals.

ADDITIONAL FEATURES INCLUDE:

• DISPLAY SCALE: adjust the display to match the input of a voltage transformer
• START-UP DELAY: At START-UP delay relay remains energized for this pre-set time to allow input voltage to stabalize before monitoring starts.
• REACTION DELAY: (TRIPP DELAY) Once energized, the relay will tolorate fault conditions for this pre-set time before it is de-energized. This allows for short term fault conditions.
• RECOVERY DELAY: Whenever the relay is de-activated, it will not operate again until this time has lapsed
• LATCH FACILITY: Once de-energised, the relay will not operate until the short across the latch pins is removed (even if the fault condition has been corrected)
• Auxilliary supply voltage is isolated from the measured AC
• keypad lock with code

Relay(s) remain energized while monitored voltage remains within pre-set upper & lower values.

Once tripped, the voltage must recover by the pre-set hysteresis voltage (difference between trip & recovery) before the relay operates again.

Display scale:                           Adjust the display to match the input of a voltage transformer.

Start-up delay:                          At start-up the relay remains energized for this pre-set time to allow the input voltage to stabilize before monitoring starts.

Reaction delay: (tripp delay)       Once energized, the relay will tolerate fault conditions for this pre-set time before the relay is de-energized. This allows for short term fault conditions.

Recovery delay:                        Whenever the relay is de-activated, it will not operate again until this time has lapsed.

Latch facility:                            Once de-energized, the relay will not operate until the short across the latch pins is removed. (even if the fault condition has been corrected).

Additional features:

Auxiliary supply voltage is isolated from the measured AC

standard voltages AC: 110V , 240V , 400V, 525V ±15%

Adjustable parameters

scale                                                         5V - 3050V

upper limit                                                  (if full scale = 300V) 0V - 300V

lower limit                                                  (if full scale = 300V) 0V - 300V

hysteresis                                                  1V - 300V

start-up delay                                             0 - 99 seconds

reaction delay (tripp delay)                           0 - 99 seconds

recovery delay (minimum relay off time)         0 - 99 seconds

calibration                                                  90% - 110%

keypad and menu lock

General information all parameters are saved to non-volatile eeprom memory, thus eliminating the need to re-program after a power failure

Technical information TRUE RMS by taking ±180 readings per cycle

All parameters are saved to non-volatile eeprom memory, thus eliminating the need to re-program after a power failure

Accuracy: 1% of full scale Typically 0.5% at 25 °C.
Scale: 5 to 3500 (in steps of 5)
Full scale input voltage: 300V RMS
Supply voltage: +-15% of rated voltage

Download User Manual Here