ZCT Type Zero-sequence Current Transformer

Item No.: ZCT
ZCT type zero-sequence current transformer is used in conjunction with the relay protection device.
Description
Description
Introduce

The ZCT type zero-sequence current transformer is used in conjunction with the relay protection device or signal when the power system generates zero-sequence grounding current to make the device components act and realize protection or monitoring.
When an electric shock or leakage fault occurs in the circuit, the secondary side of the transformer outputs the zero-sequence current, so that the equipment on the connected secondary line can be protected (cut off the power supply, alarm, etc.).

A zero-sequence current transformer is a type of current transformer used to measure the unbalanced current in a three-phase electrical system. The ZCT is designed to detect the zero-sequence component of the current, which is the sum of the three phase currents. This is also referred to as the "neutral current", as it is the current that flows in the neutral conductor of a three-phase system.

The ZCT is typically used in applications where it is necessary to detect ground faults, which can occur when a fault current flows from one or more of the phase conductors to ground. The ZCT is placed around the neutral conductor of the three-phase system, and it produces an output signal that is proportional to the zero-sequence component of the current.

By detecting the zero-sequence component of the current, the ZCT can detect ground faults, even when the fault current is small. This can help to prevent damage to equipment and reduce the risk of electric shock to personnel. The ZCT is commonly used in power distribution systems, motor control centers, and other electrical installations where ground faults can occur.

Applications
Electric fire monitorin;
Fire prevention and leakage protection system;
Electromagnetic relaying protection;
Microcomputer protection, etc;
Mainfeatures
Detection of unbalanced current: ZCTs are designed to measure the unbalanced current in a three-phase electrical system, which is the sum of the three phase currents. This allows them to detect ground faults, which can occur when a fault current flows from one or more of the phase conductors to ground.
High sensitivity: ZCTs are highly sensitive and can detect even small amounts of ground fault current. This helps to prevent damage to equipment and reduce the risk of electric shock to personnel.
Accuracy: ZCTs are designed to provide accurate measurements of the zero-sequence component of the current, even in the presence of high levels of noise or interference.
Non-intrusive installation: ZCTs are typically installed around the neutral conductor of a three-phase system, which means that they can be installed without the need to break the circuit or interrupt power to the load.
Frequency response: ZCTs are designed to operate over a wide range of frequencies, typically from 50Hz to 400Hz, which makes them suitable for use in a variety of applications.
Low burden: ZCTs are designed to have a low burden, which means that they do not significantly affect the operation of the circuit or the accuracy of other measurement devices in the system.
Overall, ZCTs are reliable and accurate devices that play an important role in protecting electrical systems from ground faults and ensuring the safety of personnel and equipment.
Technical Parameter

Electrical parameters Mechanical parameters
Frequency 50~400Hz Shell ABS(flame retardant grade 94-V0)
Rated input 10mA~5A Bobbin PBT
Measuring range 10%In~130%In iron core Ni steel/nanocrystalline
Rated output 0~1v (A or) 0~0.25mA Internal structure Environmentally friendly epoxy resin casting
Ratio difference ≤±0.1% Construction plan Screw fixing
Phase difference ≤±10 Working temperature -25℃~ +75℃
Dielectric Strength 2.5KV/1mA/1min Ambient Humidity ≤85%
Insulation resistance DC500V/1000MΩ/min Wiring method Terminal type/shielded twisted wire 1.5m

Dimensions

 

Mechanical dimension(for reference only)

Model Specifications Dimensions
Reference current ø A B C D E
ZCT-25 ≤63A 25 104 55 45 4 29
ZCT-45 ≤100A 45 104 78 66 5 32
ZCT-65 ≤225A 65 124 98 86 5 32
ZCT-80 ≤400A 80 138 113 101 5 34
ZCT-100 ≤630A 100 158 135 123 5 34
ZCT-150 ≤1000A 150 158 187 170 5 35

24Hs online service
365Ds NON-Stop Production 20Ys Professional Manufacturers
Professional designer and manufacturer of current transformer,
cooperated with Siemens ,schneider Fuji electrical softbank LG samdsung.
Tel:13968747975
Add:(Zhejiang Lierde Relay Co., Ltd.) Xinguang Ind. Zone, Liushi Town, Wenzhou, Zhejiang, China

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