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STS-(3000K, 6000K)-H1 Smart Transformer Station Installation Guide
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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).
Connecting Cables

Connecting Cables


Before connecting cables, ensure that the upstream and downstream switches of the STS are turned off, and that the STS is not energized. Otherwise, the high voltage of the STS may result in electric shocks.

  • The device damage caused by incorrect cable connections is beyond the warranty scope.
  • Only qualified electricians can perform operations about electrical connections.
  • Wear proper PPE at all time when connecting cables.
  • Before connecting cables to ports, leave enough slack to reduce the tension on the cables and prevent poor cable connection.

The cable colors shown in the electrical connection diagrams provided in this chapter are for reference only. Select cables in accordance with local cable specifications (green-and-yellow cables are only used for protective earthing).

Wiring Requirements

  • Cables should be arranged neatly and the cable insulation layer should be intact.
  • The cable connectors prepared onsite must be secure, reliable, neat, and comply with relevant regulations.
  • Power cables, ground cables, and signal cables should be securely and reliably connected in conformity with wiring regulations.
  • Power cables should be routed according to the requirements for routing strong-current and weak-current cables and in compliance with the cable routing plan. Power cables and signal cables should be bound separately.
  • Both ends of cables should be marked with a label that is easy to understand and faces outward.
  • Cable ties should be neatly cut without sharp burs, evenly distributed, bound to a proper strength, and fastened towards the same direction.
  • The bundled cables should be close to each other, straight, and neat.
  • The redundant cables should be coiled neatly for identification.
  • Cables should not be overly bent to avoid damage the cable cores.
  • Cables should not be tied where they bend.
Updated: 2019-12-05

Document ID: EDOC1100115701

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