HVL/cc Medium Voltage, Metal-Enclosed Switchgear 2.4 to 38 kV, 60 to 150 kV BIL, 25 kA Short-time, Indoor or Outdoor – Instruction Bulletin PDF
6045–1

Final Preparation and Energization

This chapter contains information on how to operate HVL/cc Metal-Enclosed Switchgear.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462.
  • This equipment must only be installed and serviced by qualified electrical personnel.
  • Only qualified electrical personnel familiar with medium voltage circuits should perform the instructions in this bulletin. Personnel must understand the hazards involved in working with or near medium voltage equipment.
  • Qualified electrical personnel must perform work in accordance with national and local electric codes.
  • Perform such work only after reading and understanding all of the instructions contained in this bulletin.
  • Turn off all power supplying this equipment before working on or inside equipment.
  • The Live Line Indicator is not an indicator of the absence of voltage.
  • Always use a properly rated voltage sensing device to confirm power is off.
  • Before performing visual inspections, tests, or maintenance on the equipment, disconnect all sources of electric power. Assume that all circuits are live until they have been completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of backfeeding.
  • Before making any electrical connection, ensure that all leads to be connected are de-energized with proper safety grounds applied.
  • Metal-enclosed switchgear have interlocks designed to minimize hazards to the user. It is not possible to eliminate every hazard with interlocks. The user of this device is responsible for recognizing the potential hazards, for wearing protective safety equipment, and for taking adequate safety precautions.
  • Do not make any adjustments to the equipment or operate the system with safety features removed. Contact your local Schneider Electric representative for additional instructions if the device does not function as described in this manual.
  • Handle this equipment carefully and install, operate and maintain it correctly in order for it to function properly.
  • Carefully inspect your work area and remove any tools and objects left inside the equipment.
  • Replace all devices, doors, and covers before turning on the power to this equipment.
  • All instructions in this manual are written with the assumption that the customer has taken these measures before performing maintenance or testing.
Failure to follow these instructions will result in death or serious injury.

Final Operating Checks

Perform the following minimum list of operating tests that before energization:

NOTE: If any of the operating tests provide unacceptable results, DO NOT ENERGIZE THE SWITCHGEAR. Contact your local Schneider Electric field sales office or distributor.

With all power off, perform the following checks:

  1. Operate the grounding switch (if equipped) a minimum of five times and verify that the LDA (if equipped) is functioning properly. (All contact fingers must touch the field shapers when the main switch is in the grounded position.)

  2. Operate the load switch a minimum of five times.

  3. With the switch in the CLOSE position, verify that the load-side panel cannot be removed (see Removing the Load-side Access Panels).

  4. When mechanical interlocks are present for automatic transfer or duplex switching, verify that only one switch will operate at a time.

  5. Verify that the CT circuits are not shorted at the terminal block.

  6. Replace all devices, doors, and covers before turning on the power to the equipment.

Energization

After the proper testing is complete on the incoming service cables and before the switch is energized, perform the following operations.

  1. Open the incoming main switch.

  2. Energize the incoming cables.

  3. The Live Line Indicators (LLIs) are located on the main source side of the line-up as in Using Live Line Indicators. The LLI is not an indicator of the absence of voltage. As soon as the circuits are energized, the voltage indicator lamps should illuminate.

    Using Live Line Indicators

  4. Perform phase sequence tests on equipment with multiple incoming lines. Phase sequence tests can be performed through the test ports on the optional LLIs (see Phase Sequence Testing).

    Phase Sequence Testing

    NOTE: Test ports will have a potential of 17–60 V (L-G) depending on version of light head module.

  5. Close the switch, and the load-side indicators should illuminate.

  6. Close the load and feeder circuits, if provided in the line-up, one at a time.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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