250 series phase sequence and phase failure protection relays, now available from Crompton Instruments (Australia) , are suitable for use with three-phase, three or four-wire supply systems.
Designed to monitor the correct phase rotation or sequence of these systems, 250 series protection relays are capable of providing protection against incorrect phase sequence, loss of one phase, and under-voltage.
They feature LED trip indication and double pole relay contacts, and can also prevent the reverse rotation of motor driven equipment.
250 series phase sequence and phase failure protection relays are suitable for use in a range of applications, including:
- marine panels
- distribution systems
- generator sets
- control panels
- process control
- motor protection
- transformers; and
- overload protection.