Reverse operation of a compressor quickly causes it to fail and shut the whole equipment down. In addition 3-phase voltage quality impacts the chiller lifetime and must be monitored. Our DPA51 and DPB51 three-phase relays are the de facto standard in the market for reliability, size and performance. It is also important to be sure that some of the loads on the systems, such as distribution pumps, are running when required.
Our EISH, DIA53 and DIB01 ON/OFF relays monitor the load current to know if the load is operating, reducing downtime in case of fault with an early warning.