Three-phase voltage and phase monitoring relay designed to protect of three-phase loads against major type of mains faults, as:
RMS voltage reaching beyond admissible thresolds
phase sequence order violation and phase coincidence
violation of the mains voltage phase completeness and symmetry
The device performs monitoring the main circuit parameters and de-energizes load when the parameters fall beyond specified boundaries. The three-digit, seven segment display on the relay fron panel allows to:
continously indicate the actual circuit voltage
indicate type of occuring fault
view (visualize) settings of modes and parameters
The menu allows the user to make the following settings:
mode of voltage indication for each phase
mode of the relay reacio to the digital symbol for remote de-energizing
type of relay
method for setting the voltage deviation
turn on/off the phase imbalance monitoring
turn on /off the phase sequence monitoring
type of measured voltage
the maximum allowable voltage tripping thresold
the minimum allowable voltage tripping thresold
allowable phase imbalance thresold
automatic re-closure delay time
min voltage de-energize tripping delay time
max voltage de-energize tripping delay time
phase imbalance tripping delay time
phase loss tripping delay time
delay time for tripping upon digital input fault alarm signal
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