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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 an AC Input Power Cable (Double-sided Cabinet)

Connecting an AC Input Power Cable (Double-sided Cabinet)

Requirements for OT/DT Terminals

  • If a copper cable is used, use copper wiring terminals.
  • If a copper-clad aluminum cable is used, use copper wiring terminals.
  • If an aluminum alloy cable is used, use copper-to-aluminum wiring terminals, or aluminum wiring terminals along with copper-to-aluminum washers.
  • Do not connect aluminum wiring terminals to the AC terminal block. Otherwise electrochemical corrosion may occur, affecting the reliability of cable connections.
  • Comply with the IEC 61238-1 requirements when using copper-to-aluminum wiring terminals, or aluminum wiring terminals along with copper-to-aluminum washers.
  • Do not mix up the aluminum and copper sides of the copper-to-aluminum washers. Ensure that the aluminum side of the washer contacts the aluminum wiring terminal, and the copper side contacts the AC terminal block.
Figure 7-4 Requirements for OT/DT terminals
Figure 7-5 Dimensions of the AC terminal block

Procedure

  1. Connect an AC input power cable.

    • The screw assembly whose model is subject to the delivery should be tightened according to the corresponding standard torque.
    • Partially tighten the nut for the AC input power cable using a torque of 5 N·m when securing the cable.
    • The wiring terminal must be installed with heat shrink tubing at the crimping area of the cable conductor to ensure that the electrical clearance between the conductors is greater than 20 mm.
    • Lay out the AC input power cable according to the design, route the cable to the correct wiring position on the corresponding switch, and label the cable.
    Figure 7-6 Connecting an AC input power cable

    (1) Screw assembly

    (2) Copper bar

    (3) Wiring terminal

    (4) Nut

    (5) Flat washer

    (6) Spring washer

  2. Use firestop putty to seal the cable hole at the bottom.
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Updated: 2019-12-05

Document ID: EDOC1100115701

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