Current Transformers: Multi-Ratio, Rectangular, Split-Core

Class 4210 / Refer to Catalog 4210CT9701

Obsolete—January 1, 2023 Multi-Ratio Current Transformers

Models 151R, 312R

Dimensions for Models 151R and 312R

Model	Dimensions (inches)
151R 312R	6.88 4.50	12.25 11.00	4.12 2.38

Model

Dimensions (inches)

151R

312R

6.88

4.50

12.25

11.00

4.12

2.38

Multi-Ratio Transformers, UR/cUR Recognized 60 Hz-Model 312R, 25–400 Hz-Model 151R

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating ^[2] (Amperes)	Relay Class ^[3]	ANSI Accuracy Classification – 60 Hz Metering Class	Rating Factor 30 ^oC Ambient
4-1⁄2	312R601 312R122 312R202 312R302 312R402	600:5MR 1200:5MR 2000:5MR 3000:5MR 4000:5MR	C100 C200 C400 C400 C400	— — — — —	— — — — —	— — — — —	— — — — —	— — — — —	1.5 1.5 1.5 1.5 1.33
6-7⁄8	151R601 151R122 151R202 151R302 151R402	600:5MR 1200:5MR 2000:5MR 3000:5MR 4000:5MR	C200 C400 C400 C400 C800	— — — — —	— — — — —	— — — — —	— — — — —	— — — — —	1.33

Window Size (inches)

Catalog

Number

(without
brackets) ^[1]

Current Rating ^[2]

(Amperes)

Relay
Class

^[3]

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

4-1⁄2

312R601

312R122

312R202

312R302

312R402

600:5MR

1200:5MR

2000:5MR

3000:5MR

4000:5MR

C100

C200

C400

—

1.5

1.33

6-7⁄8

600:5MR

1200:5MR

2000:5MR

3000:5MR

4000:5MR

C200

C400

C800

—

1.33

Multi-Ratio Taps (Models 151R, 312R, 781R, 786R)

Nominal Ratio	Current Ratio ^[4] (Amperes)
600:5	600/500/450/400/300/250/200/150/100/50:5
1200:5	1200/1000/900/800/600/500/400/300/200/100:5
2000:5	2000/1600/1500/1200/1100/800/500/400/300:5
3000:5	3000/2500/2200/2000/1500/1200/1000/800/500/300:5
4000:5	4000/3500/3000/2500/2000/1500/1000/500

Obsolete—January 1, 2023 Rectangular Window Current Transformers

260R, 560R

Dimensions for Models 260R, and 560R

Model	Dimensions (inches)
260R 560R	2.13 3.75	4.25 7.45	2.12 1.13	4.88 5.53	7.25 11.19

Model

Dimensions (inches)

260R

560R

2.13

3.75

4.25

7.45

2.12

1.13

4.88

5.53

7.25

11.19

Rectangular Window Transformers, UR/cUR Recognized, 50–400 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	ANSI Accuracy Classification—60 Hz Metering Class	Rating Factor 30 ^oC Ambient
2-1/8 x 4-1/4	260R101 260R151 260R201	100:5 150:5 200:5	1.2	2.4 2.4 1.2	— — —	— — —	— — —	1.33
260R301 260R401 260R601	300:5 400:5 600:5	0.6 0.6 0.3	0.6 0.6 0.3	— — —	— — —	— — —	1.33
260R801 260R122 260R162	800:5 1200:5 1600:5	0.3	0.3	— — —	— — —	— — —	1.33
260R202 260R252 260R302 260R402	2000:5 2500:5 3000:5 4000:5	0.3	0.3	— — — —	— — — —	— — — —	1.33 1.0 1.0 1.0
3-3/4 x 7-7/16	560R401 560R501 560R601 560R751 560R801	400:5 500:5 600:5 750:5 800:5	1.2 0.6 0.6 0.6 0.6	1.2 1.2 0.6 0.6 0.6	2.4 2.4 1.2 1.2 1.2	— — 2.4 1.2 1.2	— — 2.4 2.4 2.4	1.33
560R102 560R122 560R152 560R162 560R202	1000:5 1200:5 1500:5 1600:5 2000:5	0.3	0.3	0.6 0.6 0.3 0.3 0.3	1.2 0.6 0.6 0.6 0.6	1.2 1.2 0.6 0.6 0.6	1.33
560R252 560R302 560R322 560R402 560R502	2500:5 3000:5 3200:5 4000:5 5000:5	0.3	0.3	0.3	0.3	0.6	1.33

Window Size (inches)

Catalog

Number

(without
brackets) ^[1]

Current

Rating

(Amperes)

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

2-1/8

4-1/4

260R101

260R151

260R201

100:5

150:5

200:5

1.2

2.4

1.2

—

1.33

260R301

260R401

260R601

300:5

400:5

600:5

0.6

0.3

0.6

0.3

—

1.33

260R801

260R122

260R162

800:5

1200:5

1600:5

0.3

—

1.33

2000:5

2500:5

3000:5

4000:5

0.3

—

1.33

1.0

3-3/4

7-7/16

560R401

560R501

560R601

560R751

560R801

400:5

500:5

600:5

750:5

800:5

1.2

0.6

1.2

0.6

2.4

1.2

—

2.4

1.2

—

2.4

1.33

560R102

560R122

560R152

560R162

560R202

1000:5

1200:5

1500:5

1600:5

2000:5

0.3

0.6

0.3

1.2

0.6

1.2

0.6

1.33

560R252

2500:5

3000:5

3200:5

4000:5

5000:5

0.3

0.6

1.33

Obsolete—January 1, 2023 Split-Core Current Transformers

Models 270R, and 273

Dimensions for Models 270R, and 273

Model	Dimensions (inches)
270R 273	3.56 3.50	8.81 6.25	3.00 3.27	9.25 9.25	13.06 11.28

Model

Dimensions (inches)

270R

273

3.56

3.50

8.81

6.25

3.00

3.27

9.25

13.06

11.28

Split-Core Transformers, Model 270R is UR/cUR Recognized, 60 Hz

Window Size (inches)	Catalog Number (without brackets) ^[1]	Current Rating (Amperes)	ANSI Accuracy Classification — 60 Hz Metering Class	Rating Factor 30 ^oC Ambient
3-9/16 x 8-3/16	270R401 270R501 270R601	400:5 500:5 600:5	— — —	— — —	— — —	— — —	— — —	1.33
3-9/16 x 8-3/16	270R801 270R102 270R122 270R152 270R162	800:5 1000:5 1200:5 1500:5 1600:5	1.2	2.4 1.2 1.2 1.2 1.2	— 2.4 2.4 2.4 2.4	— — — — —	— — — — —	1.33
270R202 270R252 270R302 270R402 270R502	2000:5 2500:5 3000:5 4000:5 5000:5	1.2	1.2	1.2	2.4 2.4 1.2 1.2 1.2	— — 2.4 1.2 1.2	1.33 1.33 1.0 1.0 1.0
3-1/2 x 6-1/4	273201 273251 273301 273401 273501	200:5 250:5 300:5 400:5 500:5	— — 2.4 2.4 2.4	— — — — —	— — — — —	— — — — —	— — — — —	1.33
273601 273801 273102 273122 273162	600:5 800:5 1000:5 1200:5 1600:5	2.4 1.2 1.2 1.2 1.2	2.4 2.4 1.2 1.2 1.2	— — 2.4 2.4 2.4	— — — — —	— — — — —	1.33
273202 273252 273302 273402	2000:5 2500:5 3000:5 4000:5	1.2	1.2	1.2	2.4 2.4 1.2 1.2	— — 2.4 1.2	1.33 1.33 1.00 1.00

Window Size (inches)

Catalog

Number

(without
brackets) ^[1]

Current Rating (Amperes)

ANSI Accuracy Classification — 60 Hz

Metering Class

Rating

Factor

30 ^oC

Ambient

B-0.1