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3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
141
Service and maintenance
11
11.1
Preventive measures
Maintenance
DANGER
Qualified personnel
Functionality tests and maintenance tasks must only be carried out by qualified personnel
due to the dangers associated with electrical equipment.
The following inspection intervals must be defined by the operator (customer) depending on
the conditions of use of the relevant SENTRON 3VL molded-case circuit breaker:
●
At least 1 x per year
●
After serious high-power shutdowns
●
After trips caused by the electronic overcurrent trip unit
●
Additional testing of downstream circuit breakers.
Inspection
Checks are required within the scope of the inspection(s) and/or after 1,000 rated current
shutdowns. Please proceed as follows:
●
External circuit breaker housing
–
Examine all visible surfaces for oxidation, residues or other adverse effects.
–
Remove residues with a lint-free, dry and clean cloth. (Never use chemical cleaners or
water)
CAUTION
Damage to the circuit breaker
Never carry out repairs to the plastic casing or the interior of the circuit breaker!
Molded-case circuit breakers contain only maintenance-free components.
●
Electrical and mechanical functions of the circuit breaker
–
Test the operating lever to check the mechanical functioning of the circuit breaker
contacts
●
Function of the mechanical on and off switch
–
Operate the trip button, if available. Return the circuit breaker to the starting position
after each operation.
●
Main circuits and control circuits, function.
Содержание SENTRON 3VL series
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Страница 10: ...Table of contents 3VL molded case circuit breakers 10 System Manual 03 2009 110 0110 02 DS 01 ...
Страница 40: ...System overview 4 2 Key data 3VL molded case circuit breakers 40 System Manual 03 2009 110 0110 02 DS 01 ...
Страница 350: ...Correction sheet 3VL molded case circuit breakers 350 System Manual 03 2009 110 0110 02 DS 01 ...
Страница 358: ...Glossary 3VL molded case circuit breakers 358 System Manual 03 2009 110 0110 02 DS 01 ...
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