Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units | |
Rev. 01, 07/2012 | Section |
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The following will be powered and functional with external power:
•All of the above functions which are functional without external power.
•Ammeter and bar graph displays are functional with or without current flowing through the circuit breaker. With current flow between 0 and 20% of sensor value, the ammeter may not be accurate.
•Trip settings and max. current readings can be accessed on the display be pressing the navigation buttons with or without current flowing through the circuit breaker.
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•Optional Modbus communications are functional, using a separate 24 Vdc power supply for the circuit breaker communications module. This separate 24 Vdc power supply is required to maintain the isolation between the trip unit and communications.
The
External Power Supply
The trip unit display can be powered by a 24 Vdc external power supply.
ENGLISH
CAUTION
HAZARD OF SHOCK, ARC FLASH OR EQUIPMENT DAMAGE
Trip unit and communication module must use separate power supplies.
Failure to follow this instruction can result in personal injury or equipment damage.
Table 7: | Power Supply Specifications |
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Function |
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Power for Trip Unit Alone | 24 Vdc, 50 mA |
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Minimum | 2400 V |
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Output (Including Max. 1% Ripple) | ±5% |
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Dielectric Withstand (Input/Output) | 3 kV rms |
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| Connections UC3 |
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Connections |
| F1 |
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| 24 Vdc |
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| F2 (+) |
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Power supply is used for graphic scree display when the circuit breaker is open or not carrying current.
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