KGA Enclosures Ltd
Contacting KGA Enclosures
Tel: +44 (0)1535 636856
Products to be ordered via E-Mail (No Online Shop)
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Please send all orders and enquiries to, we will respond with pricing confirmation and stock availability
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 KH Hi pot): or at higher voltages when a suitably 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.
Product Resources
Hammond Manufacturing Transformers
KGA Enclosures Ltd are full 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.

To purchase any product or for more information on any product, simply call (+44) 01535 636856 or E-Mail:, where we will be happy to assist you. Or view the related product ranges from Hammond Manufacturing, which are all available from KGA Enclosures Ltd. Including the: What makes KGA Enclosures Ltd different from most other larger distributors is that we offer full customisation services on all enclosure and accessories (where applicable). All customisation work is undertaken by the relevant supplier, (some small projects are done utilizing outside contractors) at their own manufacturing facilities. These services include milling or punching of holes and slots into the enclosure or end plates for cables, connectors, switches etc. Printing and silk screening services allow for the addition of text, logos and graphics onto both the enclosure and end plates, to allow the end user to easily identify the product as well as giving the final product a more elegant finish. For more information on customisation services, please contact us.
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CT Series - Hammond Manufacturing Transformrers at KGA Enclosures Ltd
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
E-Mail Us -
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VAT No: GB 204612745
Business No: 09341700