Reference Manual

Unit Description, BFU-21 and BFU-22

18 Unit Description, BFU-21 and BFU-22

The Battery Fuse Unit (BFU) monitors and controls the battery. It cuts

off the load (the RBS) at low battery voltage, when the temperature of

the battery is too high or if there is a short circuit between the

distribution cables.

18.1 Block Diagram

Supervision

Module

Shunt Contactor

TM and EC

supply

TM1

TM2

15A

EPC bus

(opto)

Battery

200A

P008643B

RBS DC

distribution

Contactor

Figure 113 Block diagram of BFU-21

EN/LZT 720 0008 P2A

2001-11-28

205 (485)

Preliminary