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Zhejiang KRIPAL Electric Co., Ltd.
Zhejiang KRIPAL Electric Co., Ltd 30 years experience in manufacturing ac contactor, rotary isolator switch, industrial plug socket, molded case circuit breaker and etc
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ZCT40 Zero Sequence Current Transformer 40mm for Earth Leakage Relay

Zhejiang KRIPAL Electric Co., Ltd.
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ZCT40 Zero Sequence Current Transformer 40mm for Earth Leakage Relay

Brand Name : KRIPAL

Model Number : KCT40

Certification : CE

Place of Origin : China

MOQ : 100 pcs

Price : negotiable

Payment Terms : T/T, L/C

Supply Ability : 50000 pcs per month

Delivery Time : 20 days and depends on ordering quantity

Packaging Details : Each unit packed in a individual box

Color : white

Inner dia : 40mm

Maxi current through cable : 250A

Mounting thread size : M4

Load shift : Close to zero

Phase shift : Close to zero

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ZCT40 Zero Sequence Current Transformer 40mm for Earth Leakage Relay


A zero-phase current transformer for use as a leakage current detecting element in a leakage current interrupter in which two magnetic materials of different permeability are provided so as to eliminate a range where the leakage current interrupter is inoperable without lowering its ability to distinguish noise components. The different magnetic materials may be provided as a single core constructed by mixing the materials of different permeability.

Otherwise, the materials can be provided as annually-shaped magnetic pieces stacked one on top of the other. Still further, the materials of different magnetic permeability may be provided as bands of materials interlude to form alternating layers or one of the materials may be provided as at least a portion of a protective case.


Electric fire monitoring

Leakage protection system

Electromagnetic relaying protection

Microcomputer protection


It can be widely used in the relay protection area

Encapsulated with epoxy resin to ensure strong insulation ability

Various mechanical dimensions, highly customer-tailored

Linear output current, high precision

Small volume, light weight, easy for installation

Compact and delicate appearance

Suitable for single-phase electricity meter as well as anti-tampering electricity meter

Technical data:

Rated Frequency

50/60 Hz

Accuracy Class

5P 10P

Rated Turns Ratio

1/210 (As customers' request)

Residual current input/output voltage

sensing parameters

Zero Phase (Primary/



Resistive Burden







Rated primary current


Rated accurancy limit primary current


Accuracy limit primary ALF


Highest voltage for equipment


Rated power-frequency withstand voltage


Operating Temperatur

-20 to +45 degree

Features of zero phase current transformer

﹡High sensitivity;
Close to zero load shift and zero phase shift;
﹡Excellent balance characteristics;
﹡Perfect temperature stability;
﹡Small change for output voltage after passing the heavy current IDC;
﹡A variety of configuration and output characteristics.



1. Delivery time: 20 working days for bulk order and depend on ordering quantity

2. Strong production capacity and strict quality control system;

3. Your inquiry and problems related to our products or prices will be replied in 24 hours;

4. Well-trained and experienced staffs to answer all your inquires;

5. After-sale tracking service for all of our clients;

6. OEM & ODM are available; there is an our own mould tooling center in KRIPAL factory.

7. Payment: usually L/C, T/T,

8. Delivery way: Courier as door to door service (like DHL, TNT), by sea, by air (airport to airport)

Product Tags:

zero phase current transformer


Zero Sequence Current Transformer

Quality ZCT40 Zero Sequence Current Transformer 40mm for Earth Leakage Relay for sale

ZCT40 Zero Sequence Current Transformer 40mm for Earth Leakage Relay Images

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