LZZBJ18 Current Transformer

Selection

Technical data

1. Rated insulation level: 10kV:12/42/75kV; 20kV:24/65/125kV 2. Power factor of load: cosΦ=0.8(lagging) 3. Rated secondary current: 5A(or 2A,1A) LZZBJ18-10/150b/2 Type

Rated primary current (A)	1s thermal current (kA virtual value)	Dynamic  standing   current   (kA peak)	Accuracy class combination (1S/2S)	Rated secondary output(VA)
				0.2S	0.5	5P15  10P15
20	2	5	0.2/0.5/10P10 0.2/0.5/5P10 0.5/0.5/10P10 0.2/0.2/10P10 0.5/0.5/5P10 0.2/0.2/5P10	10	10	15
30	3	7.5
40-50	5.4	13.5
75	8.1	20.2
100	10.8	27
150	16.2	40.5
200	24.3	60.7
300	37.8	94.5
400	48.6	121.5
500	63	150
600-630	63	150			15
800-1000	100	250
1200-1600	110	270
2000	175	425				10

LZZBJ18-10/185h/2 Type

Rated primary current (A)	1s thermal current (kA virtual value)	Dynamic  standing   current   (kA peak)	Accuracy class combination (1S/2S)	Rated secondary output(VA)
				0.2S	0.2	0.5	5P10 10P10	5P15 10P15
10-40	200I th	250I th	0.2/0.2 0.2/0.5 0.2/10P 0.5/10P 0.2/5P 0.5/5P	10	10	15	20	10
50-100	250I th	625I th
150-300	45	100
400-500	100	250
600-1000	140	350			15	20	30	15
1200-1600	170	425
2000-3150	240	600

LZZBJ18-10/150b/4 Type

Rated primary current (A)	1s thermal current (kA virtual value)	Dynamic  standing   current   (kA peak)	Accuracy class combination (1S/2S)	Rated secondary output(VA)
				0.2S	0.2	0.5	5P10 10P10	5P15 10P15	5P20 10P20
20-150	150Ith	375Ith	0.2/0.2 0.2/0.5 0.5/0.5 0.2/10P10 0.5/10P10 0.5/10P10	10	10	15	15	10
200	36	90
300	45	100
400-500	63	150
600-630	63	150					20	15	10
800-1000	100	250
1200-1600	110	270			15
2000	175	425						10
2500	175	425					15

LZZBJ18-10/150b/4 Type

Rated primary current (A)	1s thermal current (kA virtual value)	Dynamic  standing   current   (kA peak)	Accuracy class combination (1S/2S)	Rated secondary output(VA)
				0.2S	0.2	0.5	5P10 10P10	5P15 10P15	5P20 10P20
20-150	150Ith	375Ith	0.2(S)/0.2(S) 0.5/0.5 0.2(S)/10P(5P) 0.5/10P(5P)	10	10	15	30	20	15
200	36	90
300	45	100
400-500	63	150
600-630	63	150			15	20			20
800-1000	100	250
1200-1600	110	270
2000	175	425						15	15
2500	175	425

Model LZZBJ18-10/185h/4 type thermal standing current

Rated primary current (A)	10-40	50-100	150-300	400-500	600-1000	1200-1600	2000-3150
1s thermal current (kA virtual value)	200Ith	250Ith	45	100	140	170	240
Dynamic standing current (kA peak)	500Ith	625Ith	100	250	350	425	600

Model LZZBJ18-10/185h/4 combination of accuracy grade and corresponding secondary output

Accuracy class combination	10-200A						300-600A						800-1250A						800-1250A
	0.2 (S)	0.2	0.5	10P 10	10P 15	10P 20	0.2 (S)	0.2	0.5	10P 10	10P 15	10P 20	0.2 (S)	0.2	0.5	10P 10	10P 15	10P 20	0.2 (S)	0.2	0.5	10P 10	10P 15	10P 20
0.2(S)/10P 0.5/10P 0.2(S)/0.2(S)/0.5/0.5	10	10	20	40	30	20	10	10	20	40	30	20	10	15	20	60	40	30	10	15	20	60	40	30
0.2(S)/0.5/10P	10	10	15	30	20	15	10	10	15	40	30	20	10	15	20	50	40	30	10	15	20	50	40	30
0.2(S)/10P/10P 0.5/10P/10P	10	10	15	20	15		10	10	15	30	20		10	15	15	30	20	15	10	15	15	50	30	20
0.2(S)/0.5/10P/10P	10	10	15	15			10	10	15	15			10	15	15	20	15		10	15	15	20	15
0.2/0.2/0.5/10P	10	10	15	15			10	10	15	15			10	15	15	30	20		10	15	15	30	20

Single ratio wiring diagram

LZZBJ18-10/150b/2 type(equivalent to AS12/150b/2S) LZZBJ18-10/185h/2 type(equivalent to AS12/185h/2S) LZZBJ18-10/150b/4 type(equivalent to AS12/150b/4S) LZZBJ18-10/185h/4 type(equivalent to AS12/185h/4S) LZZBJ18-10 Single-winding mutual inductance electrical