STD1 Multi Function Phase Failure Relays

Introduction: It is a Phase Failure with Under Voltage Relay. It is best suitable for protection of balanced 3 phase loads or Motor loads in mining & earthmoving sectors. 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: · Monitors all 3 Phases of Voltage Supply. · Under Voltage (Factory set at 80% of Vset. · Adjustable System Voltage from – 15% to + 15%. · Adjustable Trip Time. · 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 230 / 415 / 575 V AC 3 Phase (±15% selectable); Auxiliary Built-in 2 Output Contacts 1 CO 3 Trip Setting (Volts) Phase unbalance 80% of Set Value; Under Voltage 80% of V set; Over Voltage --; Water Level N.A. 4 Trip Time Delay On Phase Failure 1 - 10 secs. (variable); On UV/OV N.A. 5 Resetting Mode 6 Weight 300 gms. 7 Dimensions (mm) Overall (L x W x D) 75 x 30.5 x 117.5; Mounting (L x W) 68 centre to centre