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Home > Ultra-thin Zero Phase Current Transformer > Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
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Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer
Residual Zero Phase Split Type Current Transformer

Residual Zero Phase Split Type Current Transformer

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Product Description

Basic Information

Model NO.
TR21 AH series
Trademark
TR
Origin
China
HS Code
850450
Production Capacity
300,000 units/year

Product Description

The TR21 series Residual (zero sequence) current transformers are engineered to acquire precise residual current signals, typically at the mA level. These transformers require core-winding which demands exceptional balancing characteristics, immunity to interference, and superior linearity.

This series features a wide measurement range with a rated primary current of 10mA~5A and a rated secondary current range of 0~5mA. Utilizing excellent high-permeability magnetic cores and advanced production processes, it ensures high accuracy and reliability.

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Suitable for motor protection, relay protection, and small current grounding systems.
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Ideal for electrical fire monitoring systems.
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Flexible output methods with through-structure design.
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Epoxy resin casting for excellent stability and durability.
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High permeability permalloy or nanocrystalline core for high sensitivity.
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Strong immunity to electromagnetic fields and excellent balance characteristics.

Technical Specifications

Type Specification Accuracy Rated Thermal Current Temperature Range Size (±1mm)
Continuous Φ L W H D
TR21313B 1A/0.5mA 0.2% 10A -40ºC~ +85ºC 32 91 28 70 80
TR21314B 1A/0.5mA 0.2% 10A -40ºC~ +85ºC 45 104 28 83 93
TR21315B 1A/0.5mA 0.2% 10A -40ºC~ +85ºC 65 126 28 105 115
TR213156B 1A/0.5mA 0.2% 10A -40ºC~ +85ºC 80 143 28 122 132
TR21317B 1A/0.5mA 0.2% 10A -40ºC~ +85ºC 105 172 28 151 161

Product Gallery

Residual Current Transformer View 1
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Residual Current Transformer View 8
Residual Current Transformer View 9

Frequently Asked Questions

Q1: What is the main purpose of the TR21 series?
A: It is designed to acquire residual (zero sequence) current signals, primarily for motor protection, relay protection, and electrical fire monitoring systems.
Q2: What materials are used for the core?
A: The series uses high-permeability permalloy or nanocrystalline materials to ensure high sensitivity and excellent linearity.
Q3: What is the accuracy of these current transformers?
A: The standard accuracy for the TR21 series is 0.2%, providing reliable data for protection systems.
Q4: Can these transformers withstand harsh environments?
A: Yes, they feature epoxy resin casting for stability and have an operating temperature range of -40ºC to +85ºC.
Q5: What are the primary and secondary current ranges?
A: The rated primary current ranges from 10mA to 5A, and the rated secondary current ranges from 0 to 5mA.
Q6: Are they resistant to electromagnetic interference?
A: Yes, they are designed with extremely strong immunity to electromagnetic fields and maintain excellent balance characteristics.

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