Crompton Instruments 810 Series Data Sheet

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38

Transformers

Performance

Tape Wound Current Transformers

810 Series Measuring and Protection

Features

Plain ring, foot mounting
or busbar fixings

Substantial tag terminals
or flexible leads

Measuring Duty ranges
up to 3000A

Protection Duty Classes
5P10 and 10P10

Special designs to
customers requirements

ABS American Bureau of
Shipping Approved

Designed to highest standards, 810 Series
transformers have accuracy classes, outputs
and performance to IEC 60044-1:1999 for
measuring and protective duties.

Overload withstand to: BS3938 - IEC185

Operating voltage: 660V a.c. maximum
Test voltage: 2500V a.c.
System frequency: 50/60Hz or 400Hz
Service temperature: -40°C to +70°C
Insulation class: BS2757 class Y

(Maximum 90°C)

The Crompton 810 Series provides a
comprehensive range of Measuring and
Protective duty ring current transformers
for installation where traditional
reliability, accuracy and quality are
required.

Class X Current Transformers

In balanced earth fault protection systems,
correct operation depends on the accuracy of
the current transformers. Class 5P and 10P
are suitable where the definite minimum
times is greater than 0.2 seconds. For
shorter operating time, transient conditions
may require current transformers to have
cross sectional areas many times greater
than those of steady state faults.

The following information is required.
(a) Turns ratio
(b) Knee point voltage
(c) Maximum excitation current
(d) Secondary circuit resistance

Construction

High grade silicon iron cores are carefully
selected, then insulated and protected by a
polypropylene or polycarbonate covering on
which the secondary winding is toroidally
wound by precision machines. The P.V.A.
coated copper wire is additionally protected
by a layer of half-lapped plasticised P.V.C
tape. A second layer of self bonding P.V.C.
tape is applied and vulcanised to provide a

tough moisture-resistant coating.
A substantial terminal block with tag terminal

and M6 screws and nuts is standard but M4
screws or insulated flex leads (normally
600mm) can be supplied. Integral fixing feet
are normally provided but a busbar mount
clamp or a plain ring may be specified.

Mounting Plain ring Plain ring Foot Foot Busbar Busbar
Winding Flexible Tag Flexible Tag Tag Flexible

Termination leads terminals terminals leads terminals leads
* Busbar mounted types - 944 and 947 have bore diameter ‘A’ reduced by 6mm.

Code -940 -941 -942 -943 -944* -947*

Style

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Transformers

Model Primary VA at class Approximate 5 amp Dimensions (mm's) Weight

Type Current 3 1 0.5 A* B C D E F Kgs

812 40 2 - - 20 60 48 66 40 75 0.48
812 50 2.5 - - 20 60 48 66 40 75 0.48
812 60 2.5 - - 20 60 48 66 40 75 0.48
812 75 5 - - 20 60 48 66 40 75 0.50
812 80 5 - - 20 60 48 66 40 75 0.50

814 100 5 - - 42 84 35 90 52 85 0.50
814 120 5 2.5 - 42 84 35 90 52 85 0.55
814 150 7.5 5 - 42 84 35 90 52 85 0.55
814 200 10 5 - 42 84 35 90 52 85 0.60
814 250 10 5 - 42 84 35 90 52 85 0.65
814 300 10 5 - 42 84 35 90 52 85 0.70
814 400 20 10 5 42 84 35 90 52 85 0.75

816 500 20 15 5 74 112 30 118 66 105 0.65
816 600 20 15 5 74 112 30 118 66 105 0.70
816 750 20 15 5 74 112 30 118 66 105 0.70
816 800 30 20 10 74 112 30 118 66 105 0.70

818 1000 40 30 15 98 142 33 148 81 125 0.85
818 1200 50 30 15 98 142 33 148 81 125 0.90
818 1500 50 30 20 98 142 33 148 81 125 1.05
818 1600 50 30 20 98 142 33 148 81 125 1.15
818 2000 60 45 30 98 142 33 148 81 125 1.30

819 2500 60 45 30 114 170 36 176 95 140 1.55
819 3000 60 45 30 114 170 36 176 95 140 1.70
819 4000 60 45 30 110 172 39 178 97 140 2.00
819 5000 60 45 30 110 172 39 178 97 140 2.30

Selection Table

Accuracies comply with IEC 60044-1:1999
Busbar fixings are not available on Models 812 and 813
* Busbar mounted types 944 and 947 have bore diameter ‘A’ reduced by 6mm.

Measuring Current Transformers

Current Transformers can be manufactured to
meet specific dimensional and accuracy
requirements. All enquiries should be directed
to a local sales centre stating all current,
accuracy and dimensional requirements.

Measuring Current Transformers will be coded
811-94 and Protection Current Transformers
81P-94.

Tape Wound Current Transformers

810 Series Measuring

Dimensions of standard 5A current
transformers given in mm

1A current transformer dimensions
may vary by up to 10%.

25.4

S1 S2

M6 screws

and nuts
supplied

E

D

A
F

B

C

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40

Transformers

Model Primary VA Approximate 5 amp Dimensions (mm's) Weight

Type Current Burden A* B C D E F Kgs

81A 100 2.5 38 140 76 150 78 125 5.4

5 38 140 142 150 78 125 10.8

150 2.5 38 140 54 150 78 125 3.6

5 38 140 98 150 78 125 7.2

200 2.5 38 140 54 150 78 125 3.6

5 38 140 76 150 78 125 5.4

250 2.5 38 140 54 150 78 125 3.6

5 38 140 54 150 78 125 3.6

300 2.5 38 140 32 150 78 125 1.8

5 38 140 54 150 78 125 3.6

81B 400 2.5 53 140 32 150 78 125 1.8

5 53 140 54 150 78 125 3.3

500 2.5 53 140 32 150 78 125 1.9

5 53 140 54 150 78 125 3.4

600 2.5 53 140 32 150 78 125 2.0

5 53 140 54 150 78 125 3.5

81C 750 5 63 114 42 124 65 105 1.4

7.5 63 114 66 124 65 105 2.0

10 63 114 66 124 65 105 2.0

800 5 63 114 42 124 65 105 1.4

7.5 63 114 66 124 65 105 2.0

10 63 114 66 124 65 105 2.0

1000 5 63 114 37 124 65 105 1.3

7.5 63 114 42 124 65 105 1.5

10 63 114 66 124 65 105 2.1

1200 5 63 114 37 124 65 105 1.4

7.5 63 114 42 124 65 105 1.6

10 63 114 66 124 65 105 2.2

81D 1500 5 73 132 35 142 74 125 1.5

7.5 73 132 35 142 74 125 1.5

10 73 132 57 142 74 125 2.5

1600 5 73 132 35 142 74 125 1.6

7.5 73 132 35 142 74 125 1.6

10 73 132 57 142 74 125 2.6

81E 2000 5 82 148 30 158 82 125 1.7

7.5 82 148 35 158 82 125 2.0
10 82 148 47 158 82 125 2.6
15 82 148 57 158 82 125 3.2

2500 5 80 150 30 160 83 125 1.8

7.5 80 150 35 160 83 125 2.1
10 80 150 35 160 83 125 2.1
15 80 150 47 160 83 125 2.8

3000 5 78 152 30 162 84 125 2.1

7.5 78 152 35 162 84 125 2.5
10 78 152 35 162 84 125 2.5
15 78 152 47 162 84 125 3.2

Selection Table

Accuracies comply with IEC 60044-1:1999 Accuracy Class 5P10
Busbar fixings are not available on Model 81A
* Busbar mounted types 944 and 947 have bore diameter ‘A’ reduced by 6mm.

Tape Wound Current Transformers

810 Series Protection

Dimensions of standard 5A current
transformers given in mm

1A current transformer dimensions
may vary by up to 10%.

25.4

S1 S2

M6 screws

and nuts

supplied

E

D

A

F

B

C

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41

Transformers

Selection Table (continued)

Accuracies comply with IEC 60044-1:1999 Accuracy Class 10P10
Busbar fixings are not available on Model 81F
* Busbar mounted types 944 and 947 have bore diameter ‘A’ reduced by 6mm.

Model Primary VA Approximate 5 amp Dimensions (mm's) Weight

Type Current Burden A* B C D E F Kgs

81F 100 5 32 102 93 112 59 105 3.30

7.5 32 102 115 112 59 105 4.50
10 36 140 119 150 78 125 9.25

150 5- 32 102 61 112 59 105 2.10

7.5 32 102 93 112 59 105 3.35
10 36 140 75 150 78 125 5.60

200 5 32 102 56 112 59 105 1.95

7.5 32 102 77 112 59 105 2.80
10 32 102 93 112 59 105 3.40
15 36 140 97 150 78 125 7.50

250 5 32 102 51 112 59 105 1.75

7.5 32 102 61 112 59 105 2.15
10 32 102 83 112 59 105 3.00
15 36 140 75 150 78 125 5.70

300 5 32 102 46 112 59 105 1.55

7.5 32 102 61 112 59 105 2.20
10 32 102 72 112 59 105 2.65
15 36 140 75 150 78 125 5.75

81G 400 5 47 100 56 110 58 105 1.45

7.5 47 100 83 110 58 105 2.25
10 47 100 93 110 58 105 2.55
15 51 140 75 150 78 125 5.15

500 5 47 100 51 110 58 105 1.35

7.5 47 100 83 110 58 105 2.30
10 47 100 88 110 58 105 2.50
15 51 140 75 150 78 125 5.15

600 5 44 103 49 113 60 105 1.25

7.5 44 103 59 113 60 105 1.55
10 44 103 86 113 60 105 2.35
15 44 103 96 113 60 125 2.71

81H 800 5 58 115 44 125 66 105 1.20

7.5 58 115 66 125 66 105 1.95
10 58 115 66 125 66 105 1.95
15 58 115 93 125 66 105 2.90

1000 5 58 115 39 125 66 105 1.10

7.5 58 115 44 125 66 105 1.30
10 58 115 66 125 66 105 2.10
15 58 115 76 125 66 105 2.45

1200 5 58 115 39 125 66 105 1.20

7.5 58 115 44 125 66 105 1.40
10 58 115 66 125 66 105 2.20
15 58 115 66 125 66 105 2.20

81J 1500 5 71 131 34 141 74 124 1.25

7.5 71 131 34 141 74 125 1.25
10 71 131 56 141 74 125 2.30
15 71 131 56 141 74 125 2.30

1600 5 68 134 37 144 75 125 1.30

7.5 68 134 37 144 75 125 1.30
10 68 134 59 144 75 125 2.35
15 68 134 59 144 75 125 2.35

81K 2000A 5 78 149 33 159 83 125 1.35

7.5 78 149 38 159 83 125 1.65
10 78 149 50 159 83 125 2.35
15 78 149 60 159 83 125 3.00

2500A 5 78 149 33 159 83 125 1.50

7.5 78 149 38 159 83 125 1.85
10 78 149 38 159 83 125 1.85
15 78 149 50 159 83 125 2.55

3000A 5 78 152 30 162 84 125 2.10

7.5 78 152 35 162 84 125 2.50
10 78 152 35 162 84 125 2.50
15 78 152 47 162 84 125 3.20

Tape Wound Current Transformers

810 Series Protection

Dimensions of standard 5A current
transformers given in mm

1A current transformer dimensions
may vary by up to 10%.

25.4

S1 S2

M6 screws

and nuts
supplied

E

D

A
F

B

C

7

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42

Transformers

Model Primary VA Approximate Dimensions

Type Current Burden K* L M

81L 100 5 40 108 90

150 5 40 108 68
200 7.5 40 108 73
300 10 40 108 68
400 10 61 112 90
500 10 61 112 73
600 10 61 112 73

800 15 81 145 60
1000 15 81 145 53
1200 15 81 145 45
1600 15 94 153 49
2000 15 117 163 66
2500 15 114 166 59
3000 15 114 166 59

* Busbar mounted types 944 and 947 have bore diameter reduced by 6mm.

Model 81L Dimensions (mm's)

Accuracy Class 10P10

Tape Wound Current Transformers

810 Series Protection

Fixing feet or Busbar clamps
available on request