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High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
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High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer
High Sensitivity 0-5A Split Core Current Transformer

High Sensitivity 0-5A Split Core Current Transformer

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Product Description

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Basic Specifications

Model NO.
TR21316B
Phase
Single
Operation Condition
Indoor
Usage
Protection, Measurement
Winding Form
Single Layer & Tightly Wound
Insulating Medium
Insulating Paper
Installation
Active Type
Magnetic Structure
Single Stage Type
Principle
Electromagnetic Type
Specification
80HOLE
Origin
China
HS Code
850450
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Product Description

The TR21 series Residual (zero sequence) current transformers are designed to acquire residual (zero sequence) current signals. Since residual currents are usually at the mA level and must be wound through the core, these units meet high requirements for balancing characteristics, immunity to interference, and linearity.

  • ✔ Rated primary current transformer: 10mA~5A; rated secondary current range: 0~5mA.
  • ✔ High permeability magnetic core and advanced production flow ensure accuracy and reliability.
  • ✔ Suitable for motor protection, relay protection, and small current grounding systems.
  • ✔ Ideal for electrical fire monitoring systems with flexible output methods.
  • ✔ Epoxy resin casting provides through-structure stability.
  • ✔ High permeability permalloy or nanocrystalline material offers excellent linearity and high sensitivity.
  • ✔ Strong immunity to electromagnetic fields and excellent balance characteristics.
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Technical Specifications

Type Specification Accuracy Thermal Current Temp Range Φ (mm) L (mm) W (mm) H (mm) D (mm)
TR21313B1A/0.5mA0.2%10A-40ºC~+85ºC3291287080
TR21314B1A/0.5mA0.2%10A-40ºC~+85ºC45104288393
TR21315B1A/0.5mA0.2%10A-40ºC~+85ºC6512628105115
TR213156B1A/0.5mA0.2%10A-40ºC~+85ºC8014328122132
TR21317B1A/0.5mA0.2%10A-40ºC~+85ºC10517228151161
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Frequently Asked Questions

What is the main application of the TR21 series current transformer?
It is primarily used for acquiring residual (zero sequence) current signals in motor protection, relay protection, small current grounding systems, and electrical fire monitoring.
What is the measurement range for these transformers?
The rated primary current range is from 10mA to 5A, with a rated secondary output range of 0 to 5mA.
What materials are used for the magnetic core?
The transformers use high permeability permalloy or nanocrystalline materials to ensure high sensitivity and excellent linearity.
Are these transformers suitable for outdoor installation?
No, according to the technical specifications, these units are designed for indoor operation conditions.
What is the operating temperature range?
The TR21 series is designed to operate reliably within a temperature range of -40ºC to +85ºC.
What is the accuracy level of the TR21 series?
These current transformers provide a high accuracy rating of 0.2%.

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