ABB eVM1 Installation And Service Instructions Manual page 34

Note
Note
32
11.3. Servicing
11.3.1. Interruption devices in general
If cleaning is found to be necessary during the inspections, as specified in par. 10.3., use the
following procedure:
• insulate the working area and make it safe by following the safety regulations specified in the
IEC/DIN VDE Standards.
• general cleaning of the 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 household cleanser or
Rivolta BWR 210 type detergent.
• cleaning the insulating surfaces and conductive components:
– light dirt: with Rivolta BWR 210 detergent;
– resistant dirt: with cold 716 type detergent.
After cleaning, rinse thoroughly with clean water and dry carefully.
Only use halogen-free detergents and never 1.1.1-trichloroethane, trichloroethylene or carbon
tetrachloride!
11.3.2. Actuator and transmission system
A functional test of the drive must be carried out:
• when the number the number of operating cycles indicated has been exceeded, or
• during maintenance operations.
Before carrying out the functional test, open the circuit-breaker and
• take it to the test position (withdrawable circuit-breaker) or
• insulate and block the working area and make it safe in conformity with the safety rules and
according to the regulations in force (fixed circuit-breakers)
• follow the procedure for discharging the capacitor
• carry out a visual inspection of the state, removing the front panel, e.g. of:
– lubrication of the ball bearings
– the operation counter
– assembly of the sensors
– the position indicator.
Functional test:
• Connect the power supply voltage.
• Carry out several no-load operations. This test particularly applies to circuit-breakers which are
rarely activated under normal conditions.
To check the capacitor, carry out a rapid O-C-O cycle of operations of the circuit-breaker, by
pressing the pushbuttons on the front of the circuit-breaker in rapid succession.
• The LEDs on the inductive sensors are activated as soon as the circuit-breaker has reached the
closing and opening limit positions.
These operations can only be carried out by ABB personnel or suitably qualified and specially trained
personnel.