Toroidal Current Transformers

Obsolete—January 1, 2023 Toroidal Current Transformers (64R, 74R, 66R, 76R)

Models 64R, 74R

Models 66R, 76R

Models 64R, 66R, 74R, 76R,

Dimensions for 64R, 66R, 74R, and 76R

Model	Dimensions (inches)
64R 66R 74R 76R	1-15/16 1-15/16 2-11/32 2-11/32	4-3/16 4-3/16 4-11/16 4-11/16	1-1/2 31/16 1-5/8 3-1/4

Model

Dimensions (inches)

A

B

C

64R

66R

74R

76R

1-15/16

2-11/32

4-3/16

4-11/16

1-1/2

31/16

1-5/8

3-1/4

Toroidal Current Transformers, UR/cUR Recognized, 25–400 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	Relay Class	ANSI Accuracy Classification—60 Hz Metering Class	Rating Factor 30 ^oC Ambient
1-15/16	64R101 64R151 64R201 64R251 64R301 64R401 64R501 64R601 64R751	100:5 150:0 200:5 250:5 300:5 400:5 500:5 600:5 750:5	— — — — — — — — —	1.2 1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3	2.4 1.2 1.2 0.6 0.6 0.6 0.3 0.3 0.3	— — 2.4 1.2 1.2 0.6 0.6 0.3 0.3	— — — — 2.4 1.2 0.6 0.6 0.6	— — — — — — — 1.2 0.6	1.33
1-15/16	66R101 66R151 66R201 66R251 66R301 66R401 66R501 66R601 66R751	100:5 150:0 200:5 250:5 300:5 400:5 500:5 600:5 750:5	— — C10 C10 C10 C10 C20 C20 C20	1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3	— 2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3	— 2.4 2.4 1.2 1.2 0.6 0.6 0.3 0.3	— — — 2.4 2.4 1.2 0.6 0.6 0.3	1.33
2-11/32	74R201 74R251 74R301 74R401 74R501 74R601 74R751 74R801 74R102 74R122 74R152	200:5 250:5 300:5 400:5 500:5 600:5 750:5 800:5 1000:5 1200:5 1500:5	— — — — — — — — — — —	1.2 1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	0.6 0.6 1.2 0.6 0.6 0.3 0.6 0.3 0.3 0.3 0.3	— 1.2 2.4 1.2 0.6 0.6 0.6 0.6 0.3 0.3 0.3	— — — — 1.2 1.2 1.2 1.2 0.6 0.6 0.6	1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.00
2-11/32	76R201 76R251 76R301 76R401 76R501 76R601 76R751 76R801 76R102 76R122 76R152	200:5 250:5 300:5 400:5 500:5 600:5 750:5 800:5 1000:5 1200:5 1500:5	C10 C10 C10 C10 C10 C20 C20 C20 C20 C20 C20	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 2.4 1.2 1.2 0.6 0.6 0.6 0.3 0.3 0.3 0.3	1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.00

Window Size (inches)

Catalog

Number

(without

brackets) ^[1]

Current

Rating

(Amperes)

Relay

Class

ANSI Accuracy Classification—60 Hz

Metering Class

Rating

Factor

30 ^oC

Ambient

B-0.1

B-0.2

B-0.5

B-0.9

B-1.8

1-15/16

100:5

150:0

200:5

250:5

300:5

400:5

500:5

600:5

750:5

—

1.2

0.6

0.3

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

—

1.2

0.6

1.33

1-15/16

66R151

66R301

66R751

100:5

150:0

200:5

250:5

300:5

400:5

500:5

600:5

750:5

—

C10

C20

1.2

0.6

0.3

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

1.33

2-11/32

200:5

250:5

300:5

400:5

500:5

600:5

750:5

800:5

1000:5

1200:5

1500:5

—

1.2

0.6

0.3

1.2

0.6

0.3

0.6

1.2

0.6

0.3

0.6

0.3

—

1.2

2.4

1.2

0.6

0.3

—

1.2

0.6

1.33

1.00

2-11/32

200:5

250:5

300:5

400:5

500:5

600:5

750:5

800:5

1000:5

1200:5

1500:5

C10

C20

0.6

0.3

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

0.3

2.4

1.2

0.6

0.3

1.33

1.00

Obsolete—January 1, 2023 Toroidal Current Transformers (110R, 110R, 120R, 140R)

Models 100R, 110R, 120R, 140R

100R, 110R, 120R, and 140R

Dimensions for 100R, 110R, 120R, and 140R

Model	Dimensions (inches)
100R 110R 120R 140R	4 4 5-3/4 8-1/8	7 7 8-1/2 11	2-1/8 2-7/8 2-1/8 3

Model

Dimensions (inches)

A

B

C

100R

110R

120R

140R

4

5-3/4

8-1/8

7

8-1/2

11

2-1/8

2-7/8

2-1/8

3

Toroidal Current Transformers, UR/cUR Recognized, 25–400 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	Relay Class	ANSI Accuracy Classification—60 Hz Metering Class	Rating Factor 30 ^oC Ambient
4	100R201 100R301 100R401 100R501 100R601 100R801 100R102 100R122 100R152 100R162 100R202	200:5 300:5 400:5 500:5 600:5 800:5 1000:5 1200:5 1500:5 1600:5 2000:5	C10 C10 C20 C20 C20 C20 C50 C50 C50 C50 C50	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3	— 1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3	— 2.4 1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3	1.33
4	110R201 110R301 110R401 110R501 110R601 110R801 110R102 110R122 110R152 110R162 110R202	200:5 300:5 400:5 500:5 600:5 800:5 1000:5 1200:5 1500:5 1600:5 2000:5	C20 C20 C20 C50 C50 C50 C100 C100 C100 C100 C100	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3	— 2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3	1.33
5-3/4	120R201 120R301 120R401 120R501 120R601 120R801 120R102 120R122 120R152 120R162 120R202 120R252 120R302 120R402	200:5 300:5 400:5 500:5 600:5 800:5 1000:5 1200:5 1500:5 1600:5 2000:5 2500:5 3000:5 4000:5	C10 C10 C20 C20 C20 C20 C50 C50 C50 C50 C50 C50 C50 —	1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	— 2.4 1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	— — 2.4 2.4 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.00
8-1/8	140R500	50:5	—	For Ground Fault Sensing	—	—	1.33
140R101	100:5	—	—	—
8-1/8	140R401 140R501 140R601 140R801 140R102 140R122 140R152 140R202 140R252 140R302 140R402 140R502 140R602	400:5 500:5 600:5 800:5 1000:5 1200:5 1500:5 2000:5 2500:5 3000:5 4000:5 5000:5 6000:5	C20 C20 C20 C50 C50 C100 C100 C100 C100 C100 C100 C100 C100	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	2.4 1.2 1.2 0.6 0.6 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3	1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.33 1.00 1.00

Window Size (inches)

Catalog

Number

(without

brackets) ^[1]

Current

Rating

(Amperes)

Relay

Class

ANSI Accuracy Classification—60 Hz

Metering Class

Rating

Factor

30 ^oC

Ambient

B-0.1

B-0.2

B-0.5

B-0.9

B-1.8

4

200:5

300:5

400:5

500:5

600:5

800:5

1000:5

1200:5

1500:5

1600:5

2000:5

C10

C20

C50

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

0.3

—

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

1.33

4

200:5

300:5

400:5

500:5

600:5

800:5

1000:5

1200:5

1500:5

1600:5

2000:5

C20

C50

C100

0.6

0.3

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

1.33

5-3/4

200:5

300:5

400:5

500:5

600:5

800:5

1000:5

1200:5

1500:5

1600:5

2000:5

2500:5

3000:5

4000:5

C10

C20

C50

—

1.2

0.6

0.3

2.4

1.2

0.6

0.3

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

—

2.4

1.2

0.6

0.3

1.33

1.00

8-1/8

140R500

50:5

—

For Ground Fault Sensing

—

1.33

140R101

100:5

—

8-1/8

400:5

500:5

600:5

800:5

1000:5

1200:5

1500:5

2000:5

2500:5

3000:5

4000:5

5000:5

6000:5

C20

C50

C100

0.6

0.3

0.6

0.3

1.2

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

0.3

1.33

1.00

Obsolete—January 1, 2023 Toroidal Current Transformers (152R, 170R, 180R, 210R)

Models 152R, 170R, 180R, 210R

Dimensions for Models 152R, 170R, 180R, and 210R

Model	Dimensions (inches)
152R 170R 180R 210R	6.88 4.25 2.50 6.25	12.25 6.75 4.50 9.50	4.12 1.31 2.12 2.87

Model

Dimensions (inches)

A

B

C

152R

170R

180R

210R

6.88

4.25

2.50

6.25

12.25

6.75

4.50

9.50

4.12

1.31

2.12

2.87

Toroidal Current Transformers, UR/cUR Recognized, 25–400 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	Relay Class	ANSI Accuracy Classification—60 Hz Metering Class	Rating Factor 30 ^oC Ambient
6-7/8	152R500 152R101 152R151 152R201	50:5 100:5 150:5 200:5	C10 C20 C50 C50	1.2 1.2 0.6 0.6	— 2.4 1.2 0.6	— — 2.4 1.2	— — — 2.4	— — — 2.4	1.33
152R251 152R301 152R401 152R501	250:5 300:5 400:5 500:5	C50 C100 C100 C100	0.3	0.6 0.3 0.3 0.3	0.6 0.6 0.3 0.3	1.2 1.2 0.6 0.3	2.4 1.2 1.2 0.6	1.33
152R601 152R801 152R102 152R122	600:5 800:5 1000:5 1200:5	C200 C200 C200 C400	0.3	0.3	0.3	0.3	0.6 0.3 0.3 0.3	1.33
152R152 152R162 152R202 152R252	1500:5 1600:5 2000:5 2500:5	C400	0.3	0.3	0.3	0.3	0.3	1.33
152R302 152R402	3000:5 4000:5	C400 C800	0.3	0.3	0.3	0.3	0.3	1.33
4-1/4	170R201 170R251 170R301	200:5 250:5 300:5	— — —	1.2 0.6 0.6	0.6	2.4 2.4 1.2	— — 2.4	— — —	1.33
170R401 170R501 170R601	400:5 500:5 600:5	— — —	0.6 0.3 0.3	0.6 0.6 0.3	0.6	1.2	— — 2.4	1.33
170R751 170R801 170R102	750:5 800:5 1000:5	C10	0.3	0.3	0.6 0.3 0.3	0.6 0.6 0.3	1.2 1.2 0.6	1.33
170R122 170R152 170R162 170R202 170R252	1200:5 1500:5 1600:5 2000:5 2500:5	C10 — — — —	0.3	0.3	0.3	0.3	0.6 0.6 0.6 0.3 0.3	1.33
2-1/2	180R101 180R151 180R201	100:5 150:5 200:5	— — —	2.4 1.2 1.2	2.4 2.4 1.2	— — 2.4	— — —	— — —	1.33
180R251 180R301 180R401	250:5 300:5 400:5	— — —	0.6 0.6 0.3	1.2 0.6 0.3	2.4 1.2 0.6	2.4 2.4 1.2	— — 2.4	1.33
180R501 180R601 180R751	500:5 600:5 750:5	— — —	0.3	0.3	0.6 0.3 0.3	0.6 0.6 0.3	1.2 1.2 0.6	1.33
180R801 180R102 180R122 180R152	800:5 1000:5 1200:5 1500:5	— — — —	0.3	0.3	0.3	0.6 0.6 0.3 0.3	1.2 0.6 0.6 0.3	1.33
2-1/2	210R122 210R162 210R202 210R252 210R302 210R402	1200:5 1600:5 2000:5 2500:5 3000:5 4000:5	C100 C100 C100 C200 C200 C200	0.3	0.3	0.3	0.3	0.3	1.33 1.33 1.33 1.33 1.0 1.0

Window Size (inches)

Catalog

Number

(without brackets) ^[1]

Current

Rating

(Amperes)

Relay Class

ANSI Accuracy Classification—60 Hz

Metering Class

Rating

Factor

30 ^oC

Ambient

B-0.1

B-0.2

B-0.5

B-0.9

B-1.8

6-7/8

50:5

100:5

150:5

200:5

C10

C20

C50

1.2

0.6

—

2.4

1.2

0.6

—

2.4

1.2

—

2.4

—

2.4

1.33

250:5

300:5

400:5

500:5

C50

C100

0.3

0.6

0.3

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

1.33

600:5

800:5

1000:5

1200:5

C200

C400

0.3

0.6

0.3

1.33

152R152

152R162

152R202

152R252

1500:5

1600:5

2000:5

2500:5

C400

0.3

1.33

152R302

152R402

3000:5

4000:5

C400

C800

0.3

1.33

4-1/4

170R201

170R251

170R301

200:5

250:5

300:5

—

1.2

0.6

2.4

1.2

—

2.4

—

1.33

170R401

170R501

170R601

400:5

500:5

600:5

—

0.6

0.3

0.6

0.3

0.6

1.2

—

2.4

1.33

170R751

170R801

170R102

750:5

800:5

1000:5

C10

0.3

0.6

0.3

0.6

0.3

1.2

0.6

1.33

1200:5

1500:5

1600:5

2000:5

2500:5

C10

—

0.3

0.6

0.3

1.33

2-1/2

180R101

180R151

180R201

100:5

150:5

200:5

—

2.4

1.2

2.4

1.2

—

2.4

—

1.33

180R251

180R301

180R401

250:5

300:5

400:5

—

0.6

0.3

1.2

0.6

0.3

2.4

1.2

0.6

2.4

1.2

—

2.4

1.33

180R501

180R601

180R751

500:5

600:5

750:5

—

0.3

0.6

0.3

0.6

0.3

1.2

0.6

1.33

800:5

1000:5

1200:5

1500:5

—

0.3

0.6

0.3

1.2

0.6

0.3

1.33

2-1/2

1200:5

1600:5

2000:5

2500:5

3000:5

4000:5

C100

C200

0.3

1.33

1.0

Obsolete—January 1, 2023 Toroidal Current Transformers (200R, 201R, 202R, 203R)

Models 200R, 201R, 202R, 203R

Dimensions for Models 200R, 201R, 202R, and 203R

Model ^[2]	Dimensions A (inches)
200R 201R 202R 203R	2.50 3.50 4.50 5.25

Model ^[2]

Dimensions A (inches)

200R

201R

202R

203R

2.50

3.50

4.50

5.25

Toroidal Current Transformers, UR/cUR Recognized, 25–400 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	Relay Class	ANSI Accuracy Classification—60 Hz Metering Class	Rating Factor 30 ^oC Ambient
2-1/2	200R101 200R151 200R201 200R251	100:5 150:0 200:5 250:5	C50 C50 C100 C100	0.6 0.3 0.3 0.3	1.2 0.6 0.3 0.3	1.2 0.6 0.6 0.3	— 1.2 1.2 0.6	— 2.4 1.2 1.2	1.5
200R301 200R401 200R501 200R601	300:5 400:5 500:5 600:5	C100 C200 C200 C200	0.3	0.3	0.3	0.3	0.6 0.3 0.3 0.3	1.5
3-1/2	201R101 201R151 201R201	100:5 150:5 200:5	C20 C50 C50	1.2 0.3 0.3	1.2 0.6 0.3	2.4 1.2 0.6	2.4 2.4 1.2	— 2.4 2.4	1.5
201R251 201R301 201R401 201R501	250:5 300:5 400:5 500:5	C100 C100 C100 C200	0.3	0.3	0.6 0.3 0.3 0.3	1.2 0.6 0.3 0.3	1.2 1.2 0.6 0.3	1.5
201R601 201R751 201R801	600:5 750:5 800:5	C200	0.3	0.3	0.3	0.3	0.3	1.5
4-1/2	202R101 202R151 202R201	100:5 150:5 200:5	C20 C20 C50	1.2 1.2 0.3	2.4 1.2 0.6	2.4 2.4 1.2	— 2.4 1.2	— — 2.4	1.5
202R251 202R301 202R401 202R501	250:5 300:5 400:5 500:5	C50 C50 C100 C100	0.3	0.3	0.6 0.6 0.3 0.3	1.2 0.6 0.3 0.3	1.2 1.2 0.6 0.8	1.5
202R601 202R751 202R801 202R102	600:5 750:5 800:5 1000:5	C100 C200 C200 C200	0.3	0.3	0.3	0.3	0.3	1.5
5-1/4	203R101 203R151 203R201	100:5 150:5 200:5	C20	1.2 0.6 0.3	2.4 1.2 0.6	— 2.4 1.2	— 2.4 2.4	— — 2.4	1.5
203R251 203R301 203R401	250:5 300:5 400:5	C20 C50 C50	0.3	0.6 0.3 0.3	1.2 0.6 0.6	1.2 1.2 0.6	2.4 1.2 1.2	1.5
203R501 203R601 203R751 203R801	500:5 600:5 750:5 800:5	C100	0.3	0.3	0.3	0.3	0.6 0.6 0.3 0.3	1.5
203R102 203R122 203R152 203R162	1000:5 1200:5 1500:5 1600:5	C200	0.3	0.3	0.3	0.3	0.3	1.5 1.5 1.5 1.33
203R202 203R252 203R302	2000:5 2500:5 3000:5	C200	0.3	0.3	0.3	0.3	0.3	1.33

Window Size (inches)

Catalog

Number

(without brackets) ^[1]

Current

Rating

(Amperes)

Relay Class

ANSI Accuracy Classification—60 Hz

Metering Class

Rating

Factor