Speed protection relay PH3

adjustable

The Speed Sensing protector trip relay monitors rotating equipment using a magnetic pick-up and provides three output contacts which can be used to initiate alarms or shutdown signals. The relay also provides a tachometer output for speed indication. Basic Parameters • Magnetic pick up input • 1mA output signal • 3 adjustable rotation set points • Power on LED (green) Operation The Speed Sensing relay will detect under-speed, over-speed and stop conditions, the set points can be used to raise an alarm or shut down the monitored equipment. The front panel provides three user set trip levels with relay LED state indication and a speed indicator analogue output signal in the form of 0-1mA. The relay can be calibrated such that the standard 100% of the relay represents the required nominal engine speed. This is achieved by supplying the appropriate input to the sensor input terminals and pressing the adjust button for more than 3 seconds thus tripping the relay to become 100% reference