Products

Encased Measurement Current Transformers (EM Series) (Refer to Guide for Selection for selection help)

SD1/M10/051
  • Tough & robust being made from high impact flame retardant materials and
    can be mounted directly on busbars operating at temperature of 105°C
  • Clear terminal cover with sealing facility as standards for all frame sizes
  • Choice of mounting arrangements - foot or busbar
  • Choice of terminations - direct clamp of cable or cable lug
  • Choice of cable direction with knockouts provided in terminal shrouds
  • Clip-on mounting feet and busbar clamps available on request at no extra charge

Performance Data

Temperature Range

-20°C to +70°C

Insulation Class

B

Dielectric Strength

2.5 kV/min

Nominal Frequency

50Hz / 60Hz

Nominal Strength (A.C. primary)

660V

Degree of Protection

IP40

Rated Short Circuit Thermal Current (Ith)

60 X rated primary current for 1 second

Rated Dynamic Current (Idyn)

2.55 X Ith

Dimensional Details (All dimensions in mm)

Frame Size

OD

ID

H

H1

A

B

EM-1A

73

22

112

87

33

44

EM-2A

73

34

112

87

33

44

EM-3A

104

62

143

118

54

44

EM-4A

134

84

173

148

84

44

EM-4C

140

101

181

156

84

44

EM-4G

155

110

195

170

104

44

EM-5A

197

134

236

211

147

44

Specifications

 Indicates the performance specifications which can be archived by the particular frame size at that particular ratio  

 Indicates standard stock CT for that particular frame size and ratio

 Indicates performance of the encased CTs achieved using Spacers

Frame Size

Ratio

Class 5

Class 3

Class 1

Class 0.5

VA

2.5

3

4

5

7.5

2

3

4

5

7.5

2

3

4

5

7.5

2

3

4

5

7.5

EM-1A

50/5A

60/5A

75/5A

100/5A

150/5A

VA

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

EM-2A

75/5A

100/5A

150/5A

200/5A

300/5A

400/5A

500/5A

VA

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

EM-3A

300/5A

400/5A

500/5A

600/5A

800/5A

1000/5A

1200/5A

VA

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

EM-4A

600/5A

800/5A

1000/5A

1200/5A

1600/5A

2000/5A

2500/5A

VA

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

2.5

5

7.5

10

15

EM-5A

1600/5A

2000/5A

2500/5A

3000/5A

4000/5A

5000/5A

6500/5A