The relay is designed to detect a sudden pressure increase caused by arcing. It is set to operate before the pressure relief device. The control circuit should de-energize the transformer and provide an alarm.
Our extensive Fairchild Industrial line of pneumatic relays serves a multitude of control applications:
1.Positive biasing relays,
2.Positive and negative biasing relays,
3.Infinitely adjustable ratio relays,
5.Averaging and pneumatic computing relays,
6.High and low pressure selectors relays,
7. High and low pressure limiting relays.