Home > New Addition to Crompton Instruments – Enviro Series Current Transformers

New Addition to Crompton Instruments – Enviro Series Current Transformers

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article image Enviro Series Current Transformers

Tyco Electronics has released the Enviro Series moulded case wound primary current transformers under its Crompton Instruments brand.  

The range of Crompton Instruments Enviro Series current transformers offers high accuracy AC current measurement for a wide range of current ratios.  

The Enviro series is ideally suited as Greenstar and Nabers energy metering solutions or for third party tenancy billing applications.  

Greenstar and Nabers installations usually require current transformers to have accuracy of Class 0.5 and monitoring loads as low as 5 Amps AC.  

Crompton Instruments have now filled the gap in the current transformer market by providing Class 0.5 accuracy on ratios below 100/5A all the way down to 5/5A that have the accuracy class required to meet these applications.  

Key features of Enviro Series current transformers:  

  • Accuracy Class 0.5 for a wide range of ratios down to 5/5A
  • Two fixing methods: Foot mounting and Busbar mounting
  • Built-in hinged terminal cover  


Rated frequency: 50/60 Hz
Rated test voltage: 3 kV AC (1 min)
Rated dynamic current (Idyn): 2.5 x Ith
System voltage: 720V maximum
Continuous overload: 1.2 x rated primary current
Rated short-time thermal current (Ith): 60 x rated primary current for 1 second
Operating temperature: -10°C to 50°C
Secondary current options: 5A, 1A, 0.5A, 0.25A, 0.1A
Standards: IEC60044-1, EN60044-1, VDE0414-44-1, GB1208-2006
Case Size: 87mm wide x 52mm deep x 103.5mm high

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