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3VT3 Molded Case Circuit Breakers up to 630 A
Accessories and Components
Mounting accessories
Withdrawable design
4/42
Siemens LV 36 · 2008
4
Changes in states of switching unit when inserting and withdrawing circuit breaker
0 = contact open, 1 = contact closed
1)
Accessory compartments 6 to 9 are for 4-pole version only.
State before insertion/withdrawal
State after insertion/withdrawal
Circuit breaker before insertion
State of switches before insertion-withdrawn position
→
State of switches after insertion-inserted position
Circuit breaker before withdrawal
State of switches before withdrawal-inserted position
→
State of switches after withdrawal-withdrawn position
Accessory compartment
Lever position of circuit
breaker
State of the main contacts
1
2
3, 4, 5 (6 ... 9)
1)
1
2
3,4,5 (6 ... 9)
1)
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
3VT9 300-2AC10
3VT9 300-2AD10
Switched on
1 1
0
0
1
1
0
1
0
1
0
0
1
Manually switched off or by
motorized operating mechanism
0 1
0
0
1
0
1
1
0
1
0
0
1
Switched off by releases
0 0
1
1
0
0
1
0
1
1
0
0
1
Switched off from switched-on
state: by means of auxiliary release,
TEST push button or by OFF push
button on the motorized operating
mechanism
0 1
0
1
0
0
1
1
0
1
0
0
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1