D3-VM11

1 RELAY

This device provides OVER and / or UNDER voltage protection.
The display may be scaled to any value from 5 to 3500 and the decimal pointer set to any position. This allows the device to be configured for use with external step-down transformers.
The relay is controlled via separate upper, lower and hysteresis parameters. It may therefore be configured for both over and / or under voltage protection.
The start-up and reaction delays are programmable.
A latch facility is also included.
The menu may be reduced to stop accidental changes to more advanced settings. The settings may also be locked. When this is done, the settings may be viewed, but not changed.

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

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Download User Manual Here