Discover our Clipsal Smart Home packages as seen on The Block 2018

in location


I'm looking for

  • Wholesalers
    • Uncheck All Check All
    • Expand
    • Expand
    • Expand
    • Uncheck All Check All
  • Switchboard Manufacturers
    • Uncheck All Check All

The best way to see what Clipsal electric products can do for your home is seeing them in action at a Clipsal Display Centre.

Product stock may vary according to location. If you're after a specific product range, please check with your chosen location before visiting.

10 Results
    Load More Load Complete
    Change Location

    Video: How to properly short a CT shorting block?

    Product Line
    3090 SCCT
    Current Transformer Shorting Block

    Hardware installation/modification

    *Warning: Installation and maintenance of this device should only be performed by qualified, competent personnel that have appropriate training and experience with high voltage and current devices. Failure to follow the instructions / warnings in the Meter Installation Guide can result in permanent damage to the meter, severe injury or death. 

    CT shorting blocks are used to create an intermediate contact point between the meter and load where it is safe to perform wiring alterations. CT shorting blocks are wired such that the negative leads of the current transformers are connected to the same node and tied to ground.

    Four or Six pole shorting blocks can be used in applications with up to three current transformers as shown in the diagram below, which allows each current transformer lead to have an individual contact point. 

    In order to safely modify the current transformer wiring at the meter or metering side of the CT shorting block, the positive leads of the current transformers must also be shorted out to the CT shorting strip using the additional screws which are usually found on the corners of the shorting block.

    Once the current transformers are properly shorted using the CT shorting block, it is safe to make wiring modifications on the meter side of the shorting block.

    Once the intended wiring modifications have been completed, you will need to remove the shorting screws from the positive CT lead terminals in order to return the meter to proper operation.

    Be aware that incorrect alterations can result in arc flash.

    For further information and documentation regarding Schneider part numbers for shorting blocks, click here

    Didn’t find what you were looking for?

    Try Searching Again View Our Categories

    Need further assistance?

    Our Customer Care department provides total customer service solutions for our residential, industrial and commercial applications.

    Get Assistance