Internal Electrical Accessories; Figure 66. Auxiliary Switch (2A/2B); Figure 67 . Mechanical Trip Indicator With Associated - Eaton SBN-508 Instructions For Installation, Operation And Maintenance

Instructional Leaflet
Effective March 2012

Figure 66. Auxiliary Switch (2A/2B)

Table 9. Auxiliary Switch, Overcurrent Trip Switch and Cell Switch
Contact Ratings
Contact Rating
Control Inductive Load
Voltages (amperes)
250 Vac 10
125 Vdc 0.5
250 Vdc 0.25
Table 10. Undervoltage Release
Operational
Control Voltage Range
Voltages 85-110%
24 Vdc 20-26 Vdc
j
32 Vdc 27-35 Vdc
j
48 Vdc 41-53 Vdc
j
110-125 Vdc 94-138 Vdc
j
220-250 Vdc 187-275 Vdc
j
110-127 Vac 94-140 Vac
k
208-240 Vac 177-264 Vac
k
380-415 Vac 323-457 Vac
k
480 Vac 408-528 Vac
k
600 Vac 510-660 Vac
k
j Required for 200 ms
k Required for 400 ms
50 EATON CORPORATION www.eaton.com
IB2C12063H03
Dropout
j k
Volts Inrush/Continuous
30-60% Power Consumption
7-14 Vdc 250 W/18 W
10-19 Vdc 275 W/15 W
14-29 Vdc 275 W/18 W
33-75 Vdc 450 W/10 W
66-150 Vdc 450 W/10 W
33-76 Vac 450 VA/10 VA
62-144 Vac 400 VA/10 VA
114-249 Vac 480 VA/10 VA
144-288 Vac 400 VA/10 VA
180-360 Vac 400 VA/10 VA
Instructions for Installation, Operation and
Maintenance of Magnum SB Insulated Case
Figure 67. Mechanical Trip Indicator with Associated Overcurrent
Trip Switch

Internal Electrical Accessories

Other electrical accessories are mounted inside the circuit
breaker . They can be factory or site installed . There are two
different internally mounted accessories:
• Overcurrent Trip Switch (Bell Alarm)
• Motor Operator
Overcurrent Trip Switch (Bell Alarm)
An overcurrent trip switch (bell alarm) is an optional device
Opening
Time (ms) (Figure 67) . It provides an electrical indication when a
circuit breaker trips as a result of the trip unit reacting to an
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overcurrent condition . Opening as a result of a circuit breaker's
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manual open button, shunt trip or undervoltage release
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does not cause the overcurrent trip switch to operate . The
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overcurrent trip switch has (2a 2b) Form C contacts (Table 9) .
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Low Voltage Power Circuit Breakers