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TP48200A-HX09A3, TP48200A-HX09A4, TBC300A-DCA3, TBC300A-DCA5, TBC300A-TCA2 Outdoor Power System User Manual

This document describes the DC power systems in terms of their features, configurations, components, and maintenance methods.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Replacing a Circuit Breaker

Replacing a Circuit Breaker

Prerequisites

Before replacing an AC circuit breaker, switch off the upstream input circuit breaker.
  • The cabinet door key, insulation tape, and required tools are available.

  • The new circuit breaker is intact and has the same specifications as the circuit breaker to be replaced.

Procedure

  1. Switch off the circuit breaker that is to be replaced.
  2. Record the positions where the output cable and signal cable terminals connect to the circuit breaker.
  3. Loosen the screw that secures the upper port of the circuit breaker using a Phillips screwdriver, and remove the output power cable and signal cable terminals. Wrap the cable and terminals using insulation tape.
  4. Loosen the screw that secures the lower port of the circuit breaker using a Phillips screwdriver, and open the buckle at the base of the circuit breaker using an insulated flat-head screwdriver.
  5. Remove the circuit breaker from the guide rail. Figure 4-9 shows how to remove the circuit breaker.

    Figure 4-9  Removing the circuit breaker

  6. Switch off the new circuit breaker. Press the buckle at the circuit breaker base using an insulated flat-head screwdriver and install the new circuit breaker. Then remove the screwdriver so that the buckle secures the circuit breaker to the guide rail.
  7. Tighten the screw that secures the lower port of the circuit breaker.
  8. Remove the insulation tape from the output power cable and signal cable terminals. Then connect the output power cable and signal cable terminals to the upper port of the circuit breaker and tighten the screw.
  9. Switch on the circuit breaker. Figure 4-10 shows how to install the new circuit breaker.

    Figure 4-10  Installing the new circuit breaker

Follow-up Procedure

Check that the load fuse blown alarm has disappeared.
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Updated: 2019-03-05

Document ID: EDOC1000036238

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