BFR
Recognition of battery +pole earth fault
Recognition of battery -pole earth fault
Having two separated relays for the above faults
Two display signals:
+8: Battery +pole earth connection
-B: Battery -pole earth connection
Principles of Operation
This device is designed for protection against earth connection.
When supply voltage 6 connected to terminal +8. -B and earth or body 6 connected to terminal P_E. the device intemal relay is open{intemal contact of terminals 15 to 18 and 25 to 28 are established) and fault signals would be off.
If battery +pole is grounded. +8 signal gets ON and the intemal relay related to battery +pole fault closes right away (intemal contact of terminal 15 to 16 is made).
lf battery -pole is grounded. -B signal gets ON and the intemal relay related to battery -pole fault closes night away (internal contact of terminal 25 to 26 is made).
After +8 and -8 signals get ON. if earth connection is rectified. the related signal gets OFF and relay tums back to its primary status.
Installation and Start-Up
Battery plus and minus wires have to be connected to terminals +8 and -B8 respectively. Earth or body wire is connected to terminal P.E.
Terminal’ 15. 16 and 18 and terminas 25. 26 and 28 are the device intemal contact points related to battery plus and minus foults respectively which should be put in senes with control circuit if required. For example. to activate an alarm or to disconnect and connect the main contactor’s command.
Technical Specifications
Supply Voltage: 24. 48 or 110 VDC
Output Relay: Two Single-C/O contact relays
Contact Current: 6A. 220 VAC / 6A. 28 VDC
