Manual Part 5

BFU-21

3 Function Description

The block diagram of the BFU-21 is shown in the figure below.

Supervision

Module

Shunt

Circuit

breaker

Contactor

TM and EC

supply

Relay

TM1

TM2

15A

EPC bus

(opto)

Battery

200A

P008643A

RBS DC

distribution

Figure 1 B lock Diagra m of BFU-21

The BFU-21 consists of the following blocks:

• Con ta ctors

• Circuit breakers

• Shunt

• Transport Module (TM) and EC supply

• Supervision mo dule

3.1 Contactor

The C ontactor is used to dis connect the batteries from the system. The

Supervision Module controls the Contactor.

4 (8)

N/LZT 720 0234 Uen R2A