Voltage Protection Relay
The voltage protection relay protects a system from the faults occurring on a voltage line.
The relay protects against under voltage, over voltage, phase unbalance, phase failure, incorrect phase sequence and neutral disconnection faults.
Front adjustment knobs are provided for easy selection of nominal voltage, system type, trip delay, fault trip point. On-site 3P3W/3P4W selection offers flexibility to the user. The faults under voltage and over voltage can be disabled while other faults cannot be disabled. All faults are self-resetting.
Multiple LEDs indicate the type of faults that helps for diagnosis purpose.
Potential free relay contacts can be used for connection/disconnection of the load or trigger alarm for annunciation purpose.
The relay has fail safe operation.
Applications in motor protection, conveyor systems, server rooms, control systems or for process industry etc.
Currently there are 4 product variants available that differ in 1-phase or 3-phase and 1 or 2 relay outputs. Please select when ordering!
Parameter settings:
Nominal Voltage (variable): 3-phase: 415-440-480 VLL/240-254-277 VLN
1-phase: 220-230-240-254 VLN
Over voltage trip point: 105-125% (variable)
Under voltage Trip point: 75-95% (variable)
Voltage unbalance (1-phase): Trip point: 20% (fixed)
Phase failure: Trip point: 70% (fixed)
Hysteresis value: 3% (fixed) of trip point
3% (fixed) of Vn for unbalance
Trip delay: 0-10s variable for under voltage, over voltage and unbalance. Instand tripping for phase reversal, neutral fail and phase fail conditions
Reset delay: 1s (fixed)
Power on delay: Approx. 3s (fixed)
Technical data:
Nominal input voltage: As given above in parameter settings
Max. continuous input voltage: 127% of nominal value
Nominal frequency: 50/60Hz
Input voltage burden (1-phase): <2VA
Input voltage burden (3-phase): <4VA
Operating voltage range: 70 - 125% of nominal value
Response time: <200ms
Standards: IEC 61010-1-2010, IEC 60529, CAT III
Operating temperature: -10 to +55°C
Storage temperature: -25 to +70°C
Relative humidity: 0 to 90% RH, non-condensing
Protection class: IP20 (front side)
Relay ourtput: 1 or 2 relays with NC contacts
Relay contact ratings: 5A/250VAC/30VDC (resistive load)
Weight: approx. 80g
Dimensions: 18 x 90 x 66mm³
