PRODUCT DESCRIPTION
PRODUCT
PCS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS600000 E40
REV.
G
LANG.
en
PAGE
36/114
3.2.3. Grid breaker unit (GBU)
The GBU is a circuit breaker on the grid side of the converter. It performs not only the usual
functions of making, breaking and short circuit breaking, but also contains a three-
position-switch for disconnecting and grounding the grid-side cables.
The circuit breaker and the three position switch are located on a common mounting plate.
The three-position-switch prepares - under zero current - for the connection to earth.
Grounding is established by closing the circuit breaker with the three-position-switch set
to ground position. The GBM is placed in a GBU. The switch can only be operated manually
by a set of hand cranks.
Figure 3–11 Circuit breaker and three position switch
Figure 3–12 Operator tools (A), GBU (B) and GBM (C)
3.2.3.1. dv/dt filter module
See section 3.2.2.3,
1) Circuit breaker
2) Three position switch
3) Disconnector closed
4) Disconnector test position
5) Disconnector earthed
1) Charging lever
2) Operating crank for emergency manual
operation of motor-operated 3-position
switch
3) Hand crank for earthing switch
4) Operating lever for the 3-position switch
with manual operated mechanism
5) Hand crank for disconnector
M
1
2
3
4
5
C
A
B
5
4
3
2
1
