Home Product Low-voltage Current Transformers CNT-LSY3-10/127

THREE PHASE INTEGRATED CURRENT TRANSFORMER

THREE PHASE INTEGRATED CURRENT TRANSFORMER

Technical parameter

◆ Rated frequency: 50 Hz or 60 Hz;
◆ Rated secondary current: 5A or 1A;
◆ Power frequency withstand voltage: 3KV, lmin;
◆ Rated expansion current: 120% in;
◆ Atmospheric conditions: no serious pollution in the atmosphere
◆ Executive standard: IEC 185:1987,GB 20840.2-2014
◆ P2 represents the primary polar end, S1 and S2 represents the secondary polar end;P2 and S2 are homonymous terminals (depolarization).

Product Material

Rated frequency

50Hz or 60Hz
Rated secondary current

5A or 1A
Power frequency withstand voltage

3kV,1min
Rated expansion current

120％ln
Accuracy class

0.5~3,10P5,10P10,10P15

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Performance index Product overview

Performance index

Model	Three phase integrated current transformer
Purpose	Measuring current transformer			Protection current transformer			Double winding current transformer
I1/I2 Current ratio	Accuracy class and rated load						Accuracy class and rated load of double winding
I1/I2 Current ratio	0.5	1	3	10P15	10P10	10P5	0.5	1	10P10	10P5
100	0.5	1	3	/	1.5	2.5	/	2.5	/	2.5
150	2.5	5	7.5	/	2.5	3.75	/	3.75	/	2.5
200	2.5	5	7.5	/	2.5	5	2.5	/	/	/
300	5	5	10	/	3.75	7.5	2.5	/	/	/
400	10	7.5	/	2.5	5	10	2.5	/	2.5	5
500	10	/	/	2.5	5	10	3.75	/	2.5	5
600	10	/	/	5	10	15	5	/	5	10
800	15	/	/	5	10	15	5	/	5	10

Product overview

SY3-10/127 three-phase integrated current transformer is suitable for installation on the three-phase bushing of the switch on the ring network switch cabinet and the main column. It is used for the measurement and protection of three-phase current and zero sequence current, and can also be used for the measurement and protection of zero sequence current of multiple cable circuits.
The iron core and secondary winding of this series of current transformers are vacuum-cast with high-quality epoxy resin in a flame-retardant plastic housing, which is moisture-proof, stable and maintenance-free.