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KGA Enclosures | CT Series | Instrument Transformers | Hammond Manufacturing

The CT Series Current Transformer Indoor Toroidal From Hammond Manufacturing Transformers are available from KGA Enclosures Ltd.

KGA Enclosures Ltd

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CT Series Current Transformer Indoor Toroidal
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 600 V (4 KV Hi pot); or at higher voltages when a suitable insulated conductor is used.
  • All units have 5 A secondary for use with standard AC ammeters with 5 A movements.
  • Two hole mounting bracket on all models.
  • UL E227616 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 5 A 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.
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Hammond Manufacturing Transformers

To purchase any item or for more information simply call 01535 636856 (Outside UK +44 1535 636856) or email

KGA Enclosures Ltd are fully authorised distributors of the entire Hammond Manufacturing product ranges including the Hammond Manufacturing Transformers range. All Hammond Manufacturing products are available from KGA Enclosures at great competitive pricing. Or view the related product ranges from Hammond Manufacturing which are all available at KGA Enclosures:
CT Series - Hammond Manufacturing Transformers
Product Options
Part No Current Ratio Pri. / Sec. Accuracy % Burden VA Dimension A 1+ 10+ 25+ More
CT1000A1000:50.3 - 1.25 - 50178mm £91.29 £83.99 £82.16 More....
CT100A100:52295mm £49.89 £45.90 £44.90 More....
CT1200A1200:50.3 - 1.210 - 50203mm £101.99 £93.83 £91.79 More....
CT150A150:51.2295mm £49.89 £45.90 £44.90 More....
CT200A200:51.22121mm £53.92 £49.61 £48.53 More....
CT250A250:50.6 - 1.22 - 5121mm £54.99 £50.59 £49.50 More....
CT300A300:50.6 - 1.22 - 10121mm £56.58 £52.05 £50.92 More....
CT400A400:50.6 - 1.22 - 10121mm £59.77 £54.99 £53.80 More....
CT50A50:53.2295mm £45.11 £41.50 £40.60 More....
CT600A600:50.3 - 1.22 - 20152mm £65.66 £60.40 £59.09 More....
CT60A60:52.4295mm £46.44 £42.72 £41.79 More....
CT75A75:52295mm £47.78 £43.95 £43.00 More....
CT800A800:50.3 - 1.25 - 50152mm £80.05 £73.65 £72.05 More....
Please visit individual product page for more detailed information
Hammond Manufacturing - Customisation Services
Modified Electronic Enclosures
Almost every enclosure will need some kind of modification to be useful. In house modifications can be tedious, over complicated and a distraction from your main core business. A third party shop can add time and expense. Let us help you to deliver quality products made to your exact specifications.
Hammond Manufacturing Customisation Services
Why choose Hammond Manufacturing to modify your enclosure
  • Hammond Manufacturing offers a wide selection and massive inventory of enclosures ready to be modified.
  • Typically the minimum order quantity is 25 pieces. This can vary depending on product and service required. Please note KGA Enclosures does not add on any charges.
  • Hammond has an experience enclosure modification team and two dedicated modification facilities in North America and the United Kingdom. They are knowledgeable, available and capable.
  • Hammond Manufacturing helps eliminate scrap and design errors with approval drawings to confirm correct interpretation of your deign required. Many orders will also include a fast delivery of sample enclosures for your inspection. These steps ensure that your assembly fits perfectly before heading into the mass production stage.
Popular modification services offered:
  • Holes
  • Cutouts
  • Tapping and countersinking.
  • Pressed-in hardware (Studs, Standoffs)
  • Silk screening
  • UV Printing
  • Special colours
  • Special length extrusions
  • Pre-Installed accessories
  • Available services vary by product
For Product Availability, Price Confirmation and All Ordering Please E-Mail
Contact Us
Call Us - 01535 636856 +44 (0)1535 636856
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VAT No: GB 204612745
Business No: 09341700