Phase Monitoring / Potential Selector
2P740 700 Series Fail, Reversal, Under voltage Relay
Phase monitoring relay
Ten year factory warranty
Control Tone Insensitivity – Ripple signal control tones will not cause nuisance tripping.
Frequency Insensitive System frequency shifts of a few Hz from nominal have minimal effect on trip voltage.
Plug in measuring module
Double insulated high impact polystyrol case
Termination socket included for surface mounting enabling front or rear connection with optional DIN rail mounting
Proven circuit designs based on over 20 years of field service in hundreds of varied & demanding applications
Tolerance to shock & vibration for generator, compressor & mobile applications
The 2P740 Series relays are solid state voltage sensing relays with electromechanical output contacts. Designed for application on 3 phase AC voltage systems the 2P740 is ideally suited to monitor power supply phase angle imbalance, undervoltage and reverse phase sequence. The 2P740 measuring circuitry keeps the output relay energised while the 3 phase supply remains within the specified imbalance window thus providing failsafe system protection.
In the event of any of the follow supply conditions the output relay contact will drop out:
PHASE ANGLE IMBALANCE
LOSS OF PHASE
SUPPLY UNDER VOLTAGE
REVERSE PHASE SEQUENCE
The 700 Series range of electronic measuring relays are manufactured as a modular approach to electrical system protection & control. Designed to meet rigid Australian & international specifications the 700 Series provide a flexible, cost effective & extremely reliable solution for a multitude of applications under electrically hostile conditions.