92 / 267
3VT2 Molded Case Circuit Breakers up to 250 A
Accessories and Components
Mounting accessories
3/36
Siemens LV 36 · 2008
3
■
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
The circuit breaker in plug-in design has two positions:
1.
connected (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 signaling of the circuit breaker position
in the plug-in device
• Option to lock the plug-in device with padlocks to prevent in-
serting of the circuit breaker
• Visible and conductive disconnection of the power circuit
• Easy exchange of the circuit breaker in case of a failure
• IP20 degree of protection of all termination points
• The 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 200-4WA30 withdrawable device
Circuit breaker position
The circuit breaker in withdrawable design has three positions:
1. connected (operating position)
2. withdrawn (maintenance position)
3. removed
Circuit breaker accessories in withdrawable design
The circuit breaker in withdrawable design has the same acces-
sories as the fixed-mounted circuit breaker.
Advantages and enhanced safety for the operator
• Unambiguous remote and local signaling of the circuit breaker
and arrestment positions in the withdrawable device
• Checking of circuit breaker and accessories function in the
maintenance position
• Locking of the withdrawable device with padlocks
- prevents inserting of the circuit breaker
- locking of circuit breaker in inserted (operating) position
- locking of circuit breaker in withdrawn (maintenance)
position
• Visible and conductive disconnection of the power circuit
• Easy exchange of circuit breakers in case of failure
• IP20 degree of protection of all termination points
• The withdrawable device does not need earthing.