Eaton MDN-408 Instructions For Installation, Operation And Maintenance page 58

Instruction Book
Page 49 Effective: May 2006
breaker trips as a result of the trip unit reacting to an
overcurrent condition. Opening as a result of a circuit
breaker's manual open button, shunt trip or undervoltage
release does not cause the overcurrent trip switch to oper-
ate. The overcurrent trip switch has (2a 2b) Form C con-
tacts (Table 3.6).
The status of the contacts changes when the trip indica-
tor pops out. This permits the switch to be used as an
alarm or in conjunction with a spring release to block a
subsequent remote electrical closing signal.
Motor Operator - A Motor operator is an electric motor
assembly internally mounted in the circuit breaker
(Figures 3-55 and 3-56). It charges the closing springs
electrically for remote or local operation. The motor
operator can be factory or site installed (Table 3.7).
To convert a manually operated circuit breaker to an
electrically operated circuit breaker, a UL listed motor
operator kit is available.
Table 3.7 Motor Operator
Control ① Operational
Voltage Range Current
Voltages 85-110 %
24 Vdc
20-26
48 Vdc 41-53
110-125 Vdc 94-138
220-250 Vdc 187-225
110-127 Vac 94-140
208-240 Vac 177-264
①
AC voltages are 50/60Hz
Running Typical
Inrush
(A. avg.) Current
300% of Running
12.0
500% of Running
5.0
600% of Running
2.0
600% of Running
1.0
600% of Running
2.0
600% of Running
1.0
For more information visit: www.EatonElectrical.com
Figure 3-55 Motor Operator Kit
Figure 3-56 Motor Operator Installed in Narrow Frame
Circuit Breaker
Power Maximum
Consumption Charging Time
(watts or VA) (seconds)
300 5
250 5
250 5
250 5
250 5
250 5
I .B. 2C12060H08