Table of Contents
Advertisement
A
—
Figure 25 -
A) Closed position of door's handle;
B) Not closed position of door's handle.
—
Figure 25.1 - Circuit breaker compartment door enabling device
—
Figure 25.2 - Circuit breaker truck enabling slot
4.3.2 Door interlocking
UniGear ZS2 is equipped with the following door
interlocks:
•
The circuit breaker can be racked in from Test
to Service position only when door is closed.
(Fig. 25.1)
•
The circuit breaker compartment door cannot
be opened if the circuit breaker is in Service or
in any undefined positions (Fig 25.2)
•
The compartment door cannot be opened
if the earthing switch is open.
4.3.3 Interlocks between switchgears
The interlock between the switchgears can be
achieved by using the electrical schematic
controls.
Lock
A
1
B
B
A
2
B
A
3
B
Note: Apparatus are circuit breakers
Condition
Apparatus
Apparatus closed
racking-in/out
Apparatus closing
Undefined truck position
Apparatus
Apparatus control wiring
racking-in
connector unplugged
Apparatus control
Truck in service or undefined
wiring connector
position
plug-out
Earthing switch
Truck in service or undefined
closing
position
Apparatus
Earthing switch closed
racking-in
17
Advertisement
Table of Contents
