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Instrument Current Transformer

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Product description

This product is used as an electric energy metering device that requires high precision and small phase error. The input AC current through the core hole of the transformer induces a Ma-level current signal on the secondary side ,which is converted into the required voltage signal by the back-end sampling resistor and accurately transmitted to the electronic circuit based on micro-processing .

Product characteristics

Low price ,easy cost control

High precision ,wide linear range ,excellent consistency

Small size and light weight ,easy for high –density PCB mounting

Various shape structures are available

Application

Apply to monitoring of multi-function instruments, intelligent detection instruments ,electronic watt-hour meters and building control systems .

Product parameters

Electrical performance parameters	Operation temperature	-25℃～+55℃/-40℃~～+85℃ optional	Relative humidity	≤90%hPa
	Internal insulation	Epoxy resin	Insulation resistance	＞500 M Ohms/500Vdc
	Medium strength	3000Vac/min	Withstand impulse voltage	5000V（1.2/50μsStandard Lightning Wave）
	Operation frequency	50～400Hz	Accuracy class	According to（IEC 61869-2）class 0.1，0.2 and（JBT/10665-2016）0.1，0.2
	Environmental friendly	According to the requirement of RoHS;

Model interpretation

Typical value of products

Type	Rated input current (AC)	Rated output current (AC)	Ratio	Maximum overload times	Secondary load(Ohms)	Accuracy class	Dimensions（mm）
TR2145CB	0～5A	0～5mA	1000:1 2000:1 2500:1	20	≤20	0.1，0.2	L-W-H 15.8-17.3-19
TR2146B	0～5A	0～5mA	1000:1 2000:1 2500:1	20	≤100	0.1，0.2	L-W-H 22.5-20.8-25
TR2137-2B	0～10A	0～10mA	400:1 500:1 1000:1 2000:1 2500:1	20	≤100	0.1，0.2	L-W-H 23-12.5-22.5
TR2121-1C	0～5A	0～5mA	1000:1 2000:1 2500:1	5	≤200	0.1，0.2	L-W-H 21-18-20
TR21141-1C	0～5A	0～5mA	1000:1 2000:1 2500:1	10	≤200	0.1，0.2	L-W-H 18-17-18
TR21228C	0～5A	0～5mA	1000:1 2000:1 2500:1	2	≤200	0.1，0.2	L-W-H 18-12-12.8
TR2155-2C	0～5A	0～5mA	1000:1 2000:1 2500:1	2	≤200	0.1，0.2	L-W-H 16.8-9-20