Product Information

Measuring transformers SVT series from Vikodek Ltd. are to be used for small objects of voltage distribution with maximum voltage 0,72 kV and rated primary current 3000A.  Standard nominal current of transformer secondary coil is 5A or 1A. Active parts of transformers are enclosed in standard plastic cases. Transformers are to be used for start. Number and position of primary conductors is defined by the level of primary current. Secondry terminals are situated at the top of transformer under plastic cover with the possibility of sealing.

Accuracy classes:

0,2; 0,2s – for laboratory measurement and kilowatt-hours measurement;
0,5; 0,5s – for precise kilowatt-hours measurement;
1 – for digital panel meters;
3 – other not so precise measurements.

Transformers are encapsulated in plastic cases made of high quality fire-resistant plastic. All employed materials correspond to temperature class E. SVT series transformers comply with international standards ČSN EN 60044-1 and IEC 60044-1 as well as with most foreign standards and international recommendation IEC 185, VDE 0414/1

Product range of company VIKODEK consist of the next products:

Type Rated primary current
SVT-60/A 40-300
SVT-60/B 50-300
SVT-60/C 50-400
SVT-80/A 50-600
SVT-80/B 50-400
SVT-80/C 50-800
SVT-80/D 100-750
SVT-110/A 60-1000
SVT-110/B 100-1250
SVT-110/C 100-1600
SVT-125/A 100-1600
SVT-125/B 200-2000
SVT-155/A 200-2000
SVT-155/B 200-3000
SVT-155/C 200-3000

All technical parameters and dimensions of SVT transformers are specified at the next pages.

Order specification: transformer name + primary current + secondary current + accuracy class + output + hole size.

 Interior consumption of current in Cu line under 1A[VA]

10m 20m 40m 60m 80m 100m
1.0mm2 0.37 0.70 1.50 2.20 3.00 3.70
1.5 mm2 0.25 0.50 1.00 1.50 2.00 2.50
2.5 mm2 0.15 0.30 0.60 0.90 1.20 1.50
4.0 mm2 0.09 0.20 0.40 0.50 0.70 0.90
6.0 mm2 0.03 0.06 0.12 0.18 0.24 0.30

 Interior consumption of current in Cu line under 5A[VA]

1m 2m 4m 6m 8m 10m
1.0mm2 0.92 1.84 3.67 5.51 7.34 9.20
1.5 mm2 0.61 1.23 2.45 3.68 4.90 6.10
2.5 mm2 0.37 0.74 1.47 2.21 2.94 3.70
4.0 mm2 0.23 0.47 0.53 1.40 1.86 2.30
6.0 mm2 0.15 0.30 0.60 0.89 1.19 1.50

Admissible current error and angular misalignment for current transformers

Accuracy class + Current error (%)
(under nominal primary current in %)
+ Angular misalignmen (min)
(under nominal primary current in %)
1 5 20 50 100 120 1 5 20 50 100 120
0,2s 0,75 0,35 0,2 0,2 0,2 0,9 0,45 0,3 0,3 0,3
0,2 0,75 0,35 0,2 0,2 0,9 0,45 0,3 0,3
0,5s 1,5 0,75 0,5 0,5 0,5 2,7 1,35 0,9 0,9 0,9
0,5 1,5 0,75 0,5 0,5 2,7 1,33 0,9 0,9
1 3 1,5 1 1 5,4 2,7 1,8 1,8
3 3 3

Technical characteristics of SVT transformers

Rated voltage: 0,72kV
Test voltage: 3 kV/1 min/50Hz
Rated primary current I1N: (1-3000) A
Rated secondary current: (5 nebo 1) A
Accuracy class: 0,2; 0,2s; 0,5; 0,5s; 1; 3
Rated burden: 1;1,5;2,5;3,5;5;7,5;10;12,5;15;20;30;45;60 VA
Continuous overcurrent: 1,2 x IN
Thermal short circuit current Ith: 60 x IN
Dynamic short circuit current Idyn: 2,5 x Ith
Operating frequency: (50-60) Hz
Instrument security factor FS:  5; 10
Thermal category insulation: E (120°C max)
Ambient temperature: -20°C + 45°C
Storage temperature: -50°C + 80°C
Standard: ČSN EN 60044-1;  IEC 60044-1;    IEC 185;