Auditor CTs & Accessories
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      CTs & Rogowski-Coils for Auditors

      For installers: A summary of Current Transformer (CT's) and R-Coil specifications for all Wattwatchers Auditors

      The Current Transformers (CTs), Rogowski Coils (R-Coils) and Billing CTs required by Wattwatchers for Auditors and A6M+One packages are sold by us in sets of three in the following ratings:

      CTs for use with Wattwatchers Auditor 6M devices

      Rogowski Coils for use with Wattwatchers 3RM devices

      Billing CTs for use with CET PMC 340-BB Meter

      Specification files

      Warning: Third-party CT's to an Auditor can cause inaccurate readings and damage the hardware. The Warranty of an Auditor is void if third-party CTs, or CTs of the incorrect specification, are fitted to an Auditor.

      60A CTs (6M Compatible Only)

      Accuracy Class: 1.0

      Type: Split-Core

      Internal opening diameter: 10mm

      External dimensions: 25x40x23mm

      Cable: 1.8m (UL21885 24AWG*2C OD:3.6 grey jacket PVC wire)

      120A CTs (6M Compatible Only)

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 16mm

      External dimensions: 40x45x30mm

      Cable: 1.8m (UL21885 24AWG*2C OD:3.6 grey jacket PVC wire)

      200A CTs (6M Compatible Only)

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 24mm

      Cable: 3.0m (UL21885 24AWG*2C OD:3.6 grey jacket PVC wire)

      400A CTs (6M Compatible Only)

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 25mm

      Cable: 3.0m (UL21885 24AWG*2C OD:3.6 grey jacket PVC wire)

      600A CTs (6M Compatible Only)

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 36mm

      External dimensions: 48x80x60mm

      Cable: 3.0m (UL21885 24AWG*2C OD:3.6 grey jacket PVC wire)

      3,000A Rogowski Coils (3RM Compatible Only)

      Max Current: 3,000A

      Internal diameter sizes available: 90mm, 200mm and 290mm

      Accuracy Class: Accuracy: Class 1-A1 according to IEC 61869-10

      Type: Split-Core

      Cable Type: 3.0m - black polyurethane UL94-V0

      Cable Size: Two Core and shield @ 22 AWG (0.327mm2) 

      Cable Extension: Can be extended up to 10 meters 

      Minimum Accuracy: Down to 20A, the accuracy of Rogowski coils is within 1%. Below 20A it grows to 1.5% down to 5A.

      Ratio: 1000A/100mV@50Hz

      Rogowski specs

      600A Billing CTs (PMC Meter Compatible Only)

      600-1500A/5A Yellow Billing CTs

      Use with: Auditor 6M+One and fit to CET PMC-340BB

      Max Current: 600A

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 36mm

      External dimensions: 38.4 x 57.0 x 81.5 (mm)

      Cable: 3.0m - UL21885 2 x 16AWG  - grey jacket PVC wire

       

      Billing CT Warning: Fitting billing CT's to an Auditor will damage it and void warranty. Only use Billing CTs with PMC Meters. Billing CTs have a potential of 5A on the open ends.

      1500A Billing CTs (PMC Meter Compatible Only)

      600-1500A/5A Yellow Billing CTs

      Use with: Auditor 6M+One and fit to CET PMC-340BB

      Max Current: 1500A

      Accuracy Class: 0.5

      Type: Split-Core

      Internal opening diameter: 80mm

      External dimensions: 28.0 x 140.0 x 180.4 (mm)

      Cable: 3.0m - UL1015 2 x 16AWG  - grey jacket PVC wire

      Warning: Fitting billing CT's to an Auditor will damage it and void warranty. Only use Billing CTs with PMC Meters. Billing CTs have a potential of 5A on the open ends.

      Downloads

      📎 600V (Grey) CT and Rogowski Specifications 2024 (Current)

      📎 300V (White) CTs Specifications Legacy (For older CTs no longer in use)

      📎 CT sizing based on common cable sizes

       

      Looking to find out about extending cables? See our article Can Current Transformer and Rogowski Coil cables be extended