27
5. Commissioning:
5
.1 General Procedures
Before putting the circuit-breaker into service carry out the
following operations.
Check the tightness of the power connection on the circuit
breaker terminals.
Check that the value of the supply voltage for the auxiliary
circuits is within 85% and 110% of the rated voltage of the
electrical devices.
All the activities concerning commissioning of the breakers must be
carried out by ABB personnel or customer personnel who are suitably
qualified and have an in-depth knowledge of the apparatus & installation.
If the operations are disbled, do not force the mechanical interlocks,
but check that the operation sequence is correct
!
!
Check that no foreign body, such as
packing material, has got into the moving
parts
o
Check correct setting of the thermostat (0 C)
Also carry out the checks indicated in
the following table
Subject of Procedure Positive check
inspection
Insulation
Medium voltage circuits
The insulation resistance should be
Resistance With a 2500 V Megger, measure the at least 200 Meg. ohm and, in any case,
insulation resistance between phases constant in time.
and exposed conductive part of the
circuit.
Auxiliary circuits
The insulation resistance should be a
With a 500 V Megger measure the few Mohm and, in any case, constant
insulation resistance between the in time.
auxiliary circuits and the exposed
conductive part
Auxiliary Check that the connections to the The connections are according to the
Circuits control circuit are correct; and the electric diagram enclosed with the
supply voltage is correct . circuit-breaker.
Manually Carry out a few closing and opening The operations and relative
charged operations (see chap. 6). signals occur correctly.
operating N.B. Give rated auxiliary supply to the
mechanism u/v release on the
operating mechanism (if provided).
Motor Give rated auxiliary supply to the The springs are charged correctly
charged geared motor for spring charging The signals are correct.
operating The geared motor cuts off when the
mechanism springs are charged.
Carry out a few closing and opening The geared motor recharges the
operations. N.B. Give rated auxiliary springs after each closing operation.
supply to the under-voltage release
on the operating mechanism
(if provided).
PART B Installation, Operation & Maintenance
Содержание VBF 36
Страница 1: ...Outdoor Vacuum Circuit Breaker Type VBF Instruction for Installation Service and Maintenance ...
Страница 51: ...FIG 3 TYPICAL SCHEMATIC DIAGRAM FOR VBF36 51 Drawings ...
Страница 53: ...53 Drawings Fig 4c View from Rear side Covers removed ...
Страница 58: ...58 Dismantling of Operating Coils Setup Disconnect the motor power supply 7 Fig 11 Fig 12 Motor ...