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TP48200A-DT19D1 Telecom Power User Manual

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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).
Electrical Safety

Electrical Safety


  • The protective ground of the equipment should be reliably connected to the ground screw on the metal enclosure (grounding resistance ≤ 0.1 ohm).
  • For the equipment that needs to be grounded, install the ground cable first when installing the equipment and remove the ground cable last when removing the equipment.
  • Do not damage the ground conductor.
  • Do not operate the equipment in the absence of a properly installed ground conductor.
  • For the equipment that uses a three-pin socket, ensure that the ground terminal in the socket is connected to the protection ground.

AC and DC Power

  • The power system is energized by power sources with hazardous voltage. Direct or indirect contact (through damp objects) with the power sources may result in electric shock.
  • Non-standard and improper operations may result in fire or electric shock.
  • Do not connect or disconnect power cables with power on. Transient contact between the core of the power cable and the conductor will generate electric arcs or sparks, which may cause fire or personal injury.
  • If the power supply to the equipment is permanently connected, install an easily accessible disconnector at the exterior of the device.
  • Before making electrical connections, switch off the disconnector on the upstream device to cut off the power supply if people may contact energized components.
  • If a "high electricity leakage" tag is attached on the equipment, ground the protective ground terminal on the equipment enclosure before connecting the AC power supply; otherwise, electric shock as a result of electricity leakage may occur.
  • Before installing or removing a power cable, turn off the power switch.
  • Before connecting a power cable, check that the label on the power cable is correct.
  • Before connecting the power supply, ensure that cable connections are correct.
  • If the equipment has multiple inputs, disconnect all the inputs before operating the equipment.


  • When routing cables, ensure that a distance of at least 30 mm exists between the cables and heat-generating components or areas. This prevents damage to the insulation layer of the cables.
  • Do not route cables behind the air intake and exhaust vents of the equipment.
  • Ensure that cables meet the VW-1 flame spread rating requirements.
  • Bind cables of the same type together. When routing cables of different types, ensure that they are at least 30 mm away from each other.
  • Ensure that all cables are securely bound. Route and bind cables so that they appear neat and tidy and their cable sheaths are intact.
  • If an AC input power cable is connected to the cabinet from the top, bend the cable in a U shape outside the cabinet and then route it into the cabinet.
  • Ensure that the bending radius of each cable is at least five times the diameter of the cable.
  • When routing power cables, ensure that there is no coiling or twisting. Do not join or weld power cables. If necessary, use a longer cable.


  • When installing, operating, and maintaining the equipment, comply with the ESD protection regulations and wear the ESD clothing, gloves, and wrist strap.
  • When holding a board, hold its edge without touching any components. Do not touch the components with your bare hands.
  • Package boards with ESD packaging materials before storing or transporting them.
Updated: 2019-11-27

Document ID: EDOC1000078784

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