Functions
5.2 Voltage protection
3VL molded-case circuit breakers
64
System Manual, 03/2009, 110 0110 - 02 DS 01
Leading auxililary switch for switching from "OFF" to "ON" (leading NO contact)
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ZLWKIURQWRSHUDWLQJPHFKDQLVP
&ORVHG
2SHQ
6ZLWFK21
///
6
216
Application example:
If the circuit breaker is equipped with an undervoltage release, and the leading auxiliary
switch is installed in the rotary operating mechanism, the leading NO contacts make it
possible to supply the undervoltage release with power before the main contacts can be
closed.
Leading auxiliary switch for switching off (leading NC contact)
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ZLWKIURQWRSHUDWLQJPHFKDQLVP
&ORVHG
2SHQ
6ZLWFK2))
///
6
2))6
Application example:
In applications with thyristors, it is necessary to reset the power electronics of the converter
before the main circuit is switched off.
Circuit breakers with leading auxiliary switches create a leading signal that enables selective
deceleration of the thyristor.
Designation of the auxiliary switches and the alarm switches in the circuit breaker, and designation of
the connecting cables
MLFB
Pos. 1
Pos. 2
Pos. 3
3VL9400-2AB00/01
NC
NO
-
3VL9400-2AD00/01
NC
NO
NO (AS)
Cable designations
HS1/2
HS3/4
AS
MLFB
Pos. 1
Pos. 2
Pos. 3
Pos. 3
3VL9800-2AC00/01
NC
NO
NC
NO
3VL9800-2AE00/01
NC
NO
-
NO (AS)
Cable designations
HS1/2
HS3/4
HS5/6
HS7/8 or AS
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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