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TRAK-B Series Split-core Outdoor Waterproof Zero-sequence Current Transformer

A Core Balance Current Transformer (CBCT), also known as a Zero Sequence Current Transformer, is a specialized type of current transformer designed to detect leakage currents or earth faults in electrical systems. Unlike conventional CTs that measure the current in a single conductor, a CBCT encloses all three phase conductors (and sometimes the neutral) through a single magnetic core to monitor the vector sum of their currents.
Availability:
  • TRAK-B

  • TR

Product Overview

A 0–10mA Core Balance Current Transformer CBCT ( Zero Sequence Current Transformer ZCT) is a precision sensing device designed to detect leakage or residual currents in electrical power systems. It operates by measuring the vector sum of the currents flowing through three-phase conductors. Under normal balanced load conditions, the sum of all phase currents equals zero, and no output signal is generated. When a ground fault, insulation failure, or leakage occurs, an imbalance arises, and the transformer produces a corresponding secondary output signal, typically within the 0 ~ 10mA range, proportional to the fault current.


Product Features

*  Split-core structure, easy to install on site and easy to operate.

*  The magnetic core winding structure is cast with epoxy resin, and the end faces of the incision are matched, and the stability is good.

*  Adopt high-permeability ultra-microcrystalline core, with good linearity and high sensitivity.


Product Application

Electrical fire monitoring system, fire-fighting equipment power monitoring system, rural power grid reconstruction project, intelligent power consumption system, low-current grounding system, electromagnetic relay protection, online environmental monitoring, etc.


Download Size Sheet


Residual Current Transformer.pdf



Product Parameters

Electric
performance

Operating Temperature -40℃~+70℃ Relative Humidity ≤90%
Voltage Level 0.4/0.66/0.72kV Linear Range 5%~1000%
Rated Input Current 0~1A Rated Frequency 50/60Hz
Rated Output 0~0.25mA or 0~1V

Power Frequency

Withstand Voltage

3kV/min
Accuracy Class 0.5, 1.0 Insulation Strenth 1000MΩ/500V/min
Mechanical
structure

Shell and Skeleton PBT/PC Flame Retardant Grade 94-V0 Output Method Sheathed Lines
Iron Core Material Nanocrystalline Split-core Structure "304"Fastening with inseparable screw
Sealing and Filling Epoxy Resin Construction Plan Base mounting screw fixing


Shape and Installation Dimensions

Product
Model No.
Rated
Input
Rated
Output
Precision
Class
Dimensions(mm)
D L W H J K
TRAK-30B

0~1A

0~1A

(0.5mA)

0.5

1.0
30 88 30 68 76 M5
TRAK-45B 45 116 33 86 92 M5
TRAK-65B 65 130 33 105 110 M6
TRAK-80B 80 160 33 128 143 M6
TRAK-100B 100 188 33 154 178 M6

Zero Sequence Current Transformer


Installation Precautions

*  The live wire and the neutral wire must pass through the core hole of the transformer at the same time.

*  Before the iron core is closed, ensure that the end face of the incision is clean, free of stains and impurities

*  Use a torque wrench (electric/pneumatic) when tightening the screws, and set the torque to a reasonable range.


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