WICC Ltd Models SP & SPS Split-Core Current Transformers

Important Note: The purchase and/or use of W.I.C.C. Ltd.'s split-core current transformers constitutes acceptance of W.I.C.C. Ltd.'s Limitation of Liability set forth in W.I.C.C. Ltd.'s Standard Conditions of Sale dated 9/02/97.

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GENERAL SAFETY PRECAUTIONS

Field installation of split-core current transformers (SPCT) should only be performed by a qualified technician.

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WICC Ltd Models SP & SPS Split-Core Current Transformers

Important Note: The purchase and/or use of W.I.C.C. Ltd.'s split-core current transformers constitutes acceptance of W.I.C.C. Ltd.'s Limitation of Liability set forth in W.I.C.C. Ltd.'s Standard Conditions of Sale dated 9/02/97.

  Return to Split Core Page

 

GENERAL SAFETY PRECAUTIONS

Field installation of split-core current transformers (SPCT) should only be performed by a qualified technician.

If at all possible, it is highly recommended that the primary circuit be deenergized prior to installation of a split-core current transformer.  Otherwise, LETHAL voltages may be present across the secondary leadwires of the transformer.  If de-energization is not possible, the secondary lead wires MUST either be shorted together or securely connected to the metering device prior to installation on the primary conductor.

The split-core current transformer is supplied with a coil insulation system rated at 600 VAC.  However, portions of the transformer assembly contain conductive metal components that may not be fully insulated and should not be allowed to contact an uninsulated primary conductor or bus bar.  Any such bare conductors should be properly insulated prior to installation of the transformer.  Failure to do so may permanently damage the device and adversely affect its performance.

Do not remove the high voltage warning tag supplied with the split-core current transformer.

 

INSTALLATION NOTES

For MODEL SP Only (metal band)

  1. Before disassembling the SPCT, not the two polarity "dots" located on the same side of the transformer.  The SPCT must be reassembled in the same configuration.
     
  2. The side of the transformer with the two polarity "dots" is the H1 side.  This side is typically oriented towards the power source and is electrically in phase with the X1 lead wire.  For standard polarity models the WHT leadwire is X1.  For reversed polarity models the BLK leadwire is X1.
  3. With a 5/16" nut driver, loosen the worm screw on the metal band clamp.  Once loosened, separate both ends of the metal band to expose the top half of the SPCT core, carefully remove the top half of the core.
     
  4. Reassemble the SPCT onto the primary conductor.  Insure the contact areas between the two core halves are clean and free of any debris.  The polarity "dots" on the transformer body should be positioned as noted in step 1.
     
  5. Tighten the worm screw to 45 in-lbs of torque.
    Overtightening will strip the worm screw and could damage the SPCT.  Undertightening will cause the SPCT to perform poorly.
     
  6. Typically, SPCT's are mounted by securing them to the conductor with nylon cable ties.  If more formal mounting is desired, contact WICC for information on available mounting brackets.

For MODEL SPS Only (nylon band)

  1. Before disassembling the SPCT, not the two polarity "dots" located on the same side of the transformer.  The SPCT must be reassembled in the same configuration.
     
  2. The side of the transformer with the two polarity "dots" is the H1 side.  This side is typically oriented towards the power source and is electrically in phase with the X1 lead wire.  For standard polarity models the WHT leadwire is X1.  For reversed polarity models the BLK leadwire is X1.
     
  3. Use a flat screwdriver to release the lock on the nylon band.  Once loosened, separate both ends of the nylon band to expose the top half of the SPCT core, carefully remove the top half of the core.
     
  4. Reassemble the SPCT onto the primary conductor.  Insure the contact areas between the two core halves are clean and free of any debris.  The polarity "dots" on the transformer body should be positioned as noted in step 1.
     
  5. Feed the end of  the nylon band through the clasp and pull tight to lock in place.  Installation tools, such as Panduuit ST2EH or GS4EH, are available from third party vendors and may facilitate tightening the nylon band.
     
  6. Typically, SPCT's are mounted by securing them to the conductor with nylon cable ties.  If more formal mounting is desired, contact WICC for information on available mounting brackets.

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