CT Series | Current Transformer Indoor Toroidal
Purchase Product Product Data Sheet Customisation Options

Product Features
  • Toroidal design.
  • Supplied with 24" insulated secondary leads, terminated with crimped ring connectors.
  • Suitable for use with bare (uninsulated) primary conductor in circuits up to 600V (4 KV hipot); or at higher voltages when a suitably insulated conductor is used.
  • All units have a 5A secondary for use with standard AC ammeters with 5A movements.
  • Two hole mounting bracket on all models.
  • UL E277616 volume #1 file number X0DW2.
Application Data
To obtain current measurement:
  1. Pass the wire carrying the current to be measured through the window of the CT transformer (acting as a primary winding).
  2. Connect the CT secondary to an ammeter with a 5A movement.
For higher accuracy or higher VA burden rating:
  1. Choose a CT with a primary which is a multiple of the required primary rating and which has the accuracy or VA burden you require.
  2. Loop the wire carrying the current to be measured through the window a number of times equal to the multiple. This "winding" will reduce the ratio back to required primary rating.
    • Example "A": To obtain an accuracy of 1.2% at 10 VA burden with a ratio of 100:5, use a CT400A and loop 4 primary turns through the window.
    • Example "B": To obtain a 25:5 ratio, use a CT75A with 3 primary turns to yield 2% accuracy or a CT50A with 2 primary turns to yield 3.2% accuracy.
Hammond Manufacturing Transformers
KGA Enclosures Ltd are fully authorised distributors of the Hammond Manufacturing Transformers product range. This entire range is available from KGA Enclosures Ltd at great competitive pricing and with full customisation options on all applicable products.

Please remember - KGA Enclosures Ltd are authorised distributors of this product range. Please only use authorised distributors to purchase these products. This will then ensure you receive a genuine product.
Hammond Manufacturing Product Ranges
Did you know, you can find the entire Hammond Manufacturing product range, here at KGA Enclosures Ltd.
Share This Product Range
Share Range on Facebook Share Range on LinkedIn Share Range on X
CT Series | Hammond Manufacturing Transformers | KGA Enclosures Ltd
Product Options
Please click here for all ordering, pricing confirmation and lead times.
Part No Brand Product Information 1+ 5+ 10+ 25+
CT1000A Hammond Click part number for more details £95.34 £91.53 £87.71 £85.81
CT100A Hammond Click part number for more details £52.11 £50.03 £47.94 £46.90
CT1200A Hammond Click part number for more details £106.49 £102.23 £97.97 £95.84
CT150A Hammond Click part number for more details £52.11 £50.03 £47.94 £46.90
CT200A Hammond Click part number for more details £56.32 £54.06 £51.81 £50.69
CT250A Hammond Click part number for more details £57.43 £55.13 £52.83 £51.68
CT300A Hammond Click part number for more details £59.10 £56.74 £54.37 £53.19
CT400A Hammond Click part number for more details £62.44 £59.94 £57.45 £56.20
CT500A Hammond Click part number for more details £65.22 £62.61 £60.00 £58.69
CT50A Hammond Click part number for more details £47.10 £45.21 £43.33 £42.39
CT600A Hammond Click part number for more details £68.58 £65.84 £63.10 £61.72
CT60A Hammond Click part number for more details £48.49 £46.55 £44.61 £43.64
CT75A Hammond Click part number for more details £49.90 £47.91 £45.91 £44.91
CT800A Hammond Click part number for more details £83.63 £80.28 £76.94 £75.26
For product compatibility and more information, please see the product data sheet.

CT Series | Instrument Transformers | Hammond Manufacturing Transformers | KGA Enclosures Ltd

CT Series | Hammond Manufacturing Transformers | Enclosures - Racks - Transformers - Components