ABB Vmax 12, Инструкция по установке и обслуживанию

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20 Nm
20 Nm
VMAX - INSTALLATION AND SERVICE INSTRUCTIONS
9.2.2. Stored energy operating mechanism
Carry out the functional test of the operating
mechanism every 5,000 operations or every 4 years.
Before doing the test, open the circuit breaker and
carry out the following operations:
• for withdrawable circuit breakers, take the circuit
breaker to the test position
• for fixed circuit breakers: cut off the voltage to the
medium voltage circuit.
Note
Insulate the working area and make it safe, following the safety regulations
specified in the IEC/DIN VDE Standards.
Functional test
• Make the circuit breaker safe by discharging the
closing springs (close and open the circuit breaker
by means of the closing and opening pushbuttons).
• With the circuit breaker in the test position, carry
out a few opening and closing operations by means
of the shunt opening and closing releases.
• The nuts and screws are tightened in the factory
and correct tightening is marked with a coloured
sign. Further tightening operations during the
operating life of the circuit breaker are not
foreseen. However, if it should be necessary to
tighten the nuts or screws again following any trips,
the values indicated in fig. 12 must be respected.
9.3. Servicing
9.3.1. Interruption devices in general
If the devices had to be cleaned during the
inspections, according to what is specified in par.
9.2.1., use the following procedure:
• insulate the working area and make it safe,
respecting the safety regulations specified in the
IEC/DIN VDE Standards;
Checking screw tightening
• general cleaning of surfaces:
- dry and eliminate any light deposits of dirt using
a soft dry cloth;
- more resistant deposits of dirt can be removed
using a slightly alkaline domestic cleanser;
• cleaning insulating surfaces and conductive parts:
- light dirt: with Rivolta BWR 210 detergent;
- resistant dirt: with cold 716 type detergent.
After cleaning, rinse thoroughly with clean water and
dry carefully.
Note
Only use halogen-free detergents and never trichloroethane, trichloroethyl-
ene or carbon tetrachloride!
9.3.2. Actuator and transmission system
Servicing must be carried out after 15,000 operations
both for the actuator (snap-on box) and for the shock
absorber.
Note
Dismantling and replacement of the operating mechanism (snap-on box) can
only be carried out by ABB personnel or by qualified and specially trained per-
sonnel, especially for the necessary adjustments.
Servicing details
• If provided, turn off the spring charging motor
power supply and manually discharge the operating
mechanism springs by closing and opening the
circuit breaker.
• Replace parts subject to high climatic or mechanical
stresses (contact an ABB service centre).
Note
These operations can only be carried out by ABB personnel or suitably quali-
fied and specially trained personnel
9.3.3. Vacuum interrupters
The vacuum interrupters are maintenance-free up to
the maximum number of electrical operations
foreseen for the type of interrupter (see par. 7.2.3.
Trip curves).
—
9. Maintenance
Fig. 12