Settings Example

A BE3-47N/27 relay with a nominal input rating of 120 Vac

has the following settings:

• UNBAL – 10%

• DELAY – 5 s

The relay detects a phase unbalance when any one phase

decreases to 108 Vac or increases to 132 Vac. The output

relay trips five seconds after the phase unbalance is

detected. The output relay also trips if all phases decrease

to 85% of nominal, or 102 Vac.

INSTALLATION

BE3 phase balance relays are designed for mounting on

standard DIN rails that comply to DIN-EN 50022. Mounting

involves hooking the top edge of the cutout on the base of

the case over one edge of the DIN rail. The opposite side of

the cutout containing the release clip is then pushed over

the opposite side of the DIN rail. To remove or reposition the

relay, lever the release clip and move the relay as required.

BE3 relays should be installed in a dry, vibration-free

location where the ambient temperature does not exceed

the operating temperature range. Connections to the relay

should be made using wire that meets applicable codes and

is properly sized for the application. Figure 1 shows the

terminal connections for the BE3-47N/27 relay. Connections

for the BE3-47N relay are identical.