Instructions For Operating The Circuit Breaker - ABB HD4/R Installation And Operating Instructions Manual

M E D I U M V O LTA G E P R O D U C T S
—

6. Instructions for operating the circuit breaker

6.1
6.2 HD4/R series operating and
2
1
3
4
5
6
7
8
9
Key
1 Release REF 601 (if provided)
2 Gas state indicator (if provided).
3 Opening pushbutton
4 Closing pushbutton
5 Operation counter (if provided)
6 Circuit breaker open/closed indicator
7 Signalling device for closing springs loaded/discharged
8 Shaft for loading the closing springs in the manual mode
9 Key lock
Figure 10
Safety indications
HD4/... circuit breakers guarantee a
minimum IP3X degree of protection when
installed in the following conditions:
• fixed version, installed behind a protective
metal net
• plug-in version, installed in switchgear.
In these conditions the operator is totally
protected against accidental contact with
moving parts.
Pay the greatest attention to moving parts
if the circuit breaker is subjected to
mechanical operations outside the
switchgear or when the protective nets have
been removed.
If the operations are obstructed, do not
force the mechanical interlocks and check
that the operating sequence is correct.
The circuit breaker must be gradually
racked-in and out of the switchgear to avoid
shocks that could deform the mechanical
interlocks and the isolating contacts.
signalling mechanisms
6.3 Instructions for HD4/R series
circuit breaker operation
Circuit breaker operation can be either manual or
electrical (see fig. 10).
6.3.1 Loading the closing springs in manually
loaded operating mechanisms
Match the coupling position of the handle
(provided) with the hub (8) on the loading shaft,
fully insert it on the shaft itself and turn in a
clockwise direction until the springs loaded
signal (yellow) appears in the window (7).
The force normally applied to the loading lever
supplied is 130 N. In any case, the maximum force
applied must not exceed 170 N.
6.3.2 Closing spring loading lever
If connected to the electric power supply, the
operating mechanism will automatically load the
springs and will signal when the operation has
been completed with a yellow indicator in
the window (7).
It is advisable to load one mechanism at a time to
prevent excessive current from being absorbed in
installations with several motorized operating
mechanisms.
The first time the equipment is put into service, it
is advisable to load the closing springs in the
manual mode to prevent several operating
mechanisms from starting to load at the same
time and overloading the auxiliary power supply.
6.3.3 Manual loading in operating mechanisms
with automatic loading devices
The automatic loading movement is released
when the handle is inserted: loading can now
proceed as described in sect. 6.3.1.
Remove the handle after loading.
NOTE. If the motor starts during the manual loading operation,
continue regardless with the operation until it has been completed in
the manual mode: the motor will stop as soon as loading terminates.
Neither remove nor insert the handle if the motor is running. If the
motor stops due to the ptotection circuit breaker having tripped,
complete the loading operation in the manual mode before closing the
circuit breaker itself.
15