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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Mounting accessories
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Siemens LV 36 · 2008
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Overview
Plug-in devices
The plug-in design of the circuit breaker/switch disconnector is
intended for demanding industrial applications where rapid ex-
change of the circuit breaker along with both visual and conduc-
tive disconnection of the circuit is needed.
• The device includes:
- complete accessories for assembling circuit breakers/
switch disconnectors in plug-in design
- a set of four installation bolts (M4 x 40) for fixing the switching
unit to the plug-in device
• The device must be fitted with:
- a 3-pole 3VT2 725-.AA36-0AA0 switching unit or
- a 4-pole 3VT2 725-.AA46-0AA0 or 3VT2 725-.AA56-0AA0
switching unit
3VT9 200-4PA30 plug-in device
Circuit breaker position
Circuit breaker in plug-in design has two positions:
1. inserted (operating position)
2. removed
Circuit breaker accessories in plug-in design
The circuit breaker in plug-in design has the same accessories
as the fixed-mounted circuit breaker.
Advantages and enhanced safety for the operator
• Unambiguous remote signalling of the circuit breaker position
• Option to lock plug-in device with padlocks to prevent
inserting of the circuit breaker
• Visible and conductive disconnection of the main circuit
• Easy exchange of circuit breakers in case of failure
• IP20 protection of all termination points
• Plug-in device does not need earthing
Withdrawable devices
The withdrawable design of the circuit breaker/switch discon-
nector is intended for demanding industrial applications where
rapid exchange of the circuit breaker, frequent checking and
both visual and conductive disconnection of the circuit is
needed.
• The device includes complete accessories for assembling cir-
cuit breakers/switch disconnectors in withdrawable design
• The device must be fitted with
- a 3-pole 3VT2 725-.AA36-0AA0 switching unit or
- a 4-pole 3VT2 725-.AA56-0AA0 or 3VT2 725-.AA56-0AA0
switching unit.
3VT9 300-4WA30 withdrawable device
Circuit breaker position
The circuit breaker in withdrawable design has three positions:
1. inserted (operating position)
2. withdrawn (checking position)
3. removed
Circuit breaker accessories in withdrawable design
The circuit breaker in withdrawable design has the same
accessories as the fixed-mounted circuit breaker.
Advantages and enhanced safety for the operator
• Unambiguous remote and local signalling of the circuit
breaker and arrestment positions
• Checking of circuit breaker and accessories function in the
checking position
• Locking of withdrawable device with padlocks
prevents inserting of the circuit breaker
- locking of circuit breaker in inserted (operating position)
- locking of circuit breaker in withdrawn (checking position)
- locking by means of padlocks
• Visible and conductive disconnection of the main circuit
• Easy exchange of circuit breakers in case of failure
• IP20 protection of all termination points
• Withdrawable device does not need earthing