3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
41
Functions
5
5.1
Current protection
5.1.1
Overcurrent trip unit
The SENTRON VL circuit breakers are designed on the principle of magnetic repulsion of
the contacts. The contacts open before the expected peak-value of the short-circuit current is
reached. Magnetic repulsion of the contacts very significantly reduces the thermal load I
2
t as
well as the mechanical load resulting from the impulse short-circuit current IP of the system
components that occur during a short-circuit.
(1)
Main connections
(2)
Breaker mechanism
(3)
Overcurrent trip unit
(4)
Movable contact arm
(5)
Arc chute
(6)
Enclosure
Figure 5-1
Interior view MCCB
Summary of Contents for SENTRON 3VL series
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Page 350: ...Correction sheet 3VL molded case circuit breakers 350 System Manual 03 2009 110 0110 02 DS 01 ...
Page 358: ...Glossary 3VL molded case circuit breakers 358 System Manual 03 2009 110 0110 02 DS 01 ...
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