Checking Of Interlock Conditions; Spare Parts, Auxiliary Materials, Lubricants; Spare Parts - ABB VM1 Manual

M E D I U M V O LTA G E P R O D U C T S
7.5.2

Checking of interlock conditions

(Figures 9/17 and 9/21)
1. The withdrawable part must only be movable
from the test/disconnected position into the
service position when the circuit breaker is
open .
Check this condition as follows:
- With the circuit breaker closed, insertion of
the withdrawable part towards the service
position must be blocked after only half a
turn of the crank in the clockwise direction
Do not use force – max. torque 25 Nm!
2. The withdrawable part must only be movable
from the service position into the test/
disconnected position with the circuit breaker
open.
Check this condition as follows:
- With the circuit breaker closed, withdrawal
movement of the withdrawable part must be
blocked after only half a turn of the crank in
the anti-clockwise direction.
3. Closing of the circuit breaker must only be
possible when the withdrawable part is in the
defined test/disconnected position or service
position.
The control wiring plug 36.1 must previously
have been inserted.
Check this condition as follows:
- It must not be possible to close the circuit-
breaker with the withdrawable part in any
position between the test/ disconnected
position and the service position.
- Readiness for switching is established
electrically when the service position is
reached by auxiliary switch -BT1 in the
withdrawable assembly switching over.
4. After failure of the power supply, the circuit
breaker may only be operated manually in the
service position or in the test/disconnected
position:
a) Initially by pressing the OFF push-button 4, for
- up to 60 seconds for breaking currents up
to 25 kA.
- up to 120 seconds for breaking currents up
to 31.5 kA.
b) Manual emergency off switching using
operating lever 28 is possible beyond these
times.
5. Withdrawable parts with order-related
blocking magnet -RL2 may not be moved in
case of control power failure, or when there is
no control power. Do not forcibly move blocked
withdrawable parts! The blocking magnet -RL2
is only present on manually operated
withdrawable parts (Figure 9/28).
Releasing the blocking magnet -RL2:
- Remove front plate 1.1,
- Disengage blocking magnet -RL2 by pulling
the magnet armature,
- While doing so, turn crank 38 about one half
turn (either direction of rotation is
permissible).
- The blocking magnet is only active in the test
position and service position. In intermediate
positions it has no effect.
7.6 Spare parts, auxiliary
materials, lubricants
7.6.1

Spare parts

When parts are required, the serial number of the
relevant withdrawable breaker part or circuit
breaker should always be quoted.
Setting instructions are to be requested
separately.
Withdrawable assembly of VM1:
• Manually movable withdrawable assembly :
See Drawing GCE 7003570, Sheets 1 and 2, for
notes for setting of auxiliary switches -BT2/-BT1
and slide blocker.
• Blocking magnet -RL2:
For notes on settings see drawing GCE 7003820,
sheet 1 (table 2)
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