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35
10/09 AWB1230-1605
Effective October 2009
Operation and maintenance of
IZM low voltage air circuit breakers
MOELLER
www.moeller.net/de/support
Table 7. Spring Release Ratings
Control
Voltages
Operational Voltage
range 80–110%
inrush Power
Consumption
Closing
Time (ms)
24 Vdc
19–26 Vdc
250W
40
48 Vdc
38–53 Vdc
250W
40
110–125 Vdc
88–138 Vdc
450W
40
220–250 Vdc
176–275 Vdc
450W
40
110–127 Vdc
88–140 Vdc
450W
40
208–240 Vdc
166–264 Vdc
450W
40
a
Required for less than 200 ms.
Figure 46. Spring Release with Optional Latch Switch
Undervoltage release
—The undervoltage release is an optional
device on both manually and electrically operated circuit breakers
). It opens the circuit breaker when its supply voltage falls
to between 35–60% of rated voltage. If the release is not energized
to 85% of its supply voltage, the circuit breaker cannot be closed
electrically or manually (
).
Auxiliary switch
—An auxiliary switch is an optional device providing
remote electrical indication if the circuit breaker is open or closed
). Up to three auxiliary switches can be mounted in the
circuit breaker. Each switch has two normally open (“a”) and two
normally closed (“b”) contacts for a total of 12 available contacts
Table 8. Undervoltage Release
Control
Voltages
Operational
Voltage range
85–110%
Dropout
Volts
30–60%
inrush/Continuous
Power Consumption
Opening
Time
(ms)
24 Vdc
20–26 Vdc
7–14 Vdc
250W/18W
70
32 Vdc
27–35 Vdc
10–19 Vdc
275W/15W
70
48 Vdc
41–53 Vdc
14–29 Vdc
275W/18W
70
110–125 Vdc
94–138 Vdc
33–75 Vdc
450W/10W
70
220–250 Vdc
187–275 Vdc
66–150 Vdc
450W/10W
70
110–127 Vac
94–140 Vac
33–76 Vac
450 VA/10 VA
70
208–240 Vac
177–264 Vac
62–144 Vac
400 VA/10 VA
70
380–415 Vac
323–457 Vac
114–249 Vac
480 VA/10 VA
70
480 Vac
408–528 Vac
144–288 Vac
400 VA/10 VA
70
600 Vac
510–660 Vac
180–360 Vac
400 VA/10 VA
70
a
Required for 200 ms.
b
Required for 400 ms.
Table 9. Auxiliary Switch, Overcurrent Trip Switch, and Cell
Switch Contact Ratings
Control Voltages
Contact rating inductive Load (amperes)
250 Vac
10
125 Vdc
0.5
250 Vdc
0.25
Figure 47. Undervoltage Release