Ampacity, Power Loss For Dc; Switching Times, Endurance (Operating Cycles) For Dc - Siemens SENTRON 3WA1 Manual

Technical specifications
6.3 Technical specifications of 3WA circuit breakers
6.3.3.7

Ampacity, power loss for DC

3WA12
Permissible load for fixed-mounted versions (copper connection bars, painted black)
≤ 55 °C
≤ 60 °C
≤ 70 °C
Permissible load for withdrawable versions (copper connection bars, painted black)
For all connection types (except rear vertical main connections)
≤ 55 °C
≤ 60 °C
≤ 70 °C
For rear vertical main connections
≤ 55 °C
≤ 60 °C
≤ 70 °C
Power loss at I with symmetrical load, complete device
n
Fixed-mounted
Withdrawable
6.3.3.8

Switching times, endurance (operating cycles) for DC

3WA12
Switching times
Make time
Opening time
Electrical make time (through closing
coil)
Electrical opening time (through
shunt trip)
Electrical opening time (through
instantaneous undervoltage release)
Make time through short-time excited closing coil (5% OP)
1)
Opening time through short-time excited shunt trip (5% OP)
2)
Opening time with short-time-delayed undervoltage release: 200 ms
3)
500
1000 A
A 1000
A 1000
A 1000
A 1000
A 1000
A 1000
A 1000
A 1000
A 1000
W 140
W 280
1000 A
ms 35
ms 34
ms 80 / 50
1)
ms 80 / 50
2)
ms 80
3)
DC
2000 A
2000
2000
2000
2000
2000
1950
2000
2000
2000
390
770
DC
2000 A
35
34
80 / 50
1)
80 / 50
2)
80
3)
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
4000 A
3640
3500
3250
3640
3500
3250
3740
3640
3380
820
1640
4000 A
35
34
80 / 50
1)
80 / 50
2)
80
3)