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Closed Loop Residual (Zero Sequence) Current Transformer

Closed Loop Residual (Zero Sequence) Current Transformer

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Product Overview

Residual current transformer for leakage current measurement of cable lines. The product is simple in structure and flexible in application. According to the cable specifications used in the main circuit, there are various core diameters corresponding to it. The main circuit current includes 63A~2000A. At the same time, it meets the requirements of balanced characteristics, and the unbalanced current output is better than 30mA, 10mA, and 5mA. The product adopts high-quality high-conductivity magnetic core and advanced process technology, which can meet the technical requirements of different precisions such as 0.2, 0.5, and 1.0, and has high reliability. This series of products meet the requirements of GB 14287.2-2014 and GB 13955-2005.

Product Features

Flexible output mode, socket or lead output;

A variety of core hole diameter options, the hole diameter is from φ12mm to φ260mm;

Casting with epoxy resin, good stability;

Adopt high magnetic permeability nickel steel or nanocrystalline magnetic core, with good linearity and high sensitivity;

Excellent balance characteristics, with strong anti-electromagnetic interference ability.

Scope of Application

Suitable for motor protection, electromagnetic relay protection device, microcomputer protection device; electrical fire monitoring, fire leakage system, low current grounding system.

Product Parameters

Electric Performance Parameters	Operating Temperature	-40℃～+70℃	Relative Humidity	≤90%
	Voltage Level	0.4/0.66/0.72kV	Linear Range	5%～120%
	Rated Input Current (AC)	10mA～5A	Working Frequency	45～1250Hz
	Rated Output (AC)	0～1V or 0～5mA	Power Frequency Withstand Voltage	3000V AC/1min
	Accuracy Class	0.5, 1.0, 2.0	Insulation Resistance	≥500MΩ/500V DC
Mechanical Structure Parameters	Shell Material	PBT/PC Flame Retardant Grade 94-V0	Output Method	Socket or shielded sheathed wire
	Iron Core Material	Nickel steel or ultra microcrystalline	Construction Plan	Base installation bolts are fixed
	Sealing and Filling	Epoxy resin	Environmental Requirements	Meet RoHS

Typical Value of Main Products

Model NO.	Rated Input I_in	Rated Output I_out	Common Transformation Ratio	Accuracy Class	Secondary Load(Ω)	Dimensions（mm）
Model NO.	Rated Input I_in	Rated Output I_out	Common Transformation Ratio	Accuracy Class	Secondary Load(Ω)	Aperture D	Other Size
TR21125B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤200	25	L-W-H-J-A1-A2 80-22-69.5-68-5.2-8
TR21126B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	45	L-W-H-J-A1-A2 120-33-101.5-98-5.2-8.5
TR21127B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	55	L-W-H-J-A1-A2 150-35-126-126-5.2-12
TR2174B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	35	L-W-H-J-A1-A2 100-30-90-83.5-5.2-9.5
TR21313B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	32	L-W-H-J-A1-A2 91-28-70-80-5.5-7.5
TR21314B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	45	L-W-H-J-A1-A2 104-28-83-93-5.5-7.5
TR21315B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	65	L-W-H-J-A1-A2 126-28-105-115-5.5-7.5
TR21316B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5	≤500	80	L-W-H-J-A1-A2 143-28-122-132-5.5-7.5
TR21317B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5, 1.0	≤500	105	L-W-H-J-A1-A2 172-28-151-161-5.5-7.5
TR21117B	10mA～5A	10A	1000:1 2000:1	0.2, 0.5, 1.0	≤500	72	L-W-H-J-A1-A2 175-42-150-150-6.2-13