LV D3 Multi Function Phase Failure Relays

Introduction: It is a Negative Sequence Voltage Sensing Phase Failure Relay with Under & Over Voltage Relay. It is best suitable for protection of unbalanced 3 phase loads or for monitoring 3 phase supply of UPS or Invertor. It offers protection against Phase Failure, Phase Unbalance, Phase Sequence Reversal, Under Voltage & Over Voltage faults. It is useful for incoming side, Mains Supply monitoring, General voltage faults, AMF/Transfer Switch Panels & Pump Control Panels. It is available in DIN Rail mounting enclosure.

Features: · Under & Over Voltage (Adjustable). · Monitors Aux.Voltage for Under & Over Voltage. · Monitors all 3 phases Voltage for severe unbalanced & phase loss. · Selectable Aux.Voltage. · Auto Reset. · Sleek DIN Rail mounted enclosure.

Application Areas: Measures 3-Phase supply for Unbalance Voltage, Loss of Phase, Phase Sequence, Under Voltage & Over Voltage. Best suitable for balance 3 phase loads or motor loads only. Phase failure &UV/OV Relays can be best used for a host of Auxiliary Systems & Plant control panels & machinery.

Technical Specifications:

Sr. Parameter Specifications 1 Supply Voltage System 240 / 380 / 415 / 440 V AC ±20%; Auxiliary 220 / 230 / 240 / 380 / 415 / 440 V AC ±20% 2 Output Contacts 1 CO (2 CO) 3 Trip Setting (Volts) Phase unbalance 40 V ±6 V (fixed); Under Voltage 80% to 95% (adjustable); Over Voltage 105% to 120% (adjustable); Water Level N.A. 4 Trip Time Delay On Phase Failure 3.5 secs. ± 1.5 sec; On UV/OV Less than 2 secs. 5 Resetting Mode Auto 6 Weight 400 gms. 7 Dimensions (mm) Overall (L x W x D) 76x 56.5 x 117.5; Mounting (L x W) 67 x 46