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CTS 12 Supporting current instrument transformers CTS are designed for the measurement and protection of the distributingfacilities of high voltage for inner settings ...
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using instrument transformers for both outdoor and indoor applications, special transformers, sensors and power transformers
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Supporting current instrument transformers CTS are designed for the measurement and protection of the distributingfacilities of high voltage for inner settings.
Current transformers CTS 12 are produced in two arrangements: CTS 12.S and CTS 12.L. The difference of these two arrangements is only the length of the instrument (see the picture). (Dimension in brackets is for CTS 12.L.) The bigger dimensions of CTS 12.L allow to fulfill the more demandingtasks of the customer for the parameters of the instrument (3-cores arrangement, higher performance, higherovercurrent number, etc.).
The value of the secondary current is 5 A or 1 A with the possibility of combination. The classes of accuracy for the circuits of measurement are 0.2, 0.5, 1.3, for the circuit of protection are 5P, 10P. The transformers comply with the required class of accuracy within the values from 25% to 100% of rated load.
The limiting working current is 120% of IN ,according to the agreement of producer and customer it is possible tosupply other values, for example 200% of IN.
Transformers CTS are constructed as transformers with single-turn or multi-turn primary winding. The up-to-date construction of these transformers allows the switching not only on the secondary side but also on the primaryone. The primary switching can be easily mounted by the means of connection of two jumpers to the circuit by the means of two screws M8 (See “The Instructions for the mounting and operation”. Screws and jumpers are the partof the transformer).
The secondary winding is wound
on the magnetic core made of directed plates, eventually
made of the alloyof nickel, iron and copper “permalloy”.
The number of cores can be from 1 to 3 according to the
request of customer.
All active parts of transformer are compound-insulated with epoxy-mixture. This material performs both the electrical insulating and the mechanical functions.
The mounting position of transformers is arbitrary. Transformers are fixed by the means of four screws in the holesin the basic plate. The primary terminals of transformers are provided with screws M12x35 mm. We recommend use terminal ends corresponding to the used cross-section of the conductor for attaching to the secondary outlets. The secondary terminal plate is provided with the cover with sealing screw. Inside, there is the set with jumpers and small screws for the possibility of earth connection and short circuiting of the wiring. (See “The Instructions for the mounting and operation”).
For the use of the transformers CTS 12 and CTS 25 in distributors VH-IRODEL we produce and supply epoxy adapter, pin and special basic plate. In cases, where the supplement for the older types of transformers (by various producers) is required, we supply instruments CTS on the modified basic plates that have identicalmounting spacing to spacing of the substituted types.
Transformers CTS complied with all the tests according to ČSN EN 6044-1.
For the customer’s request we provide official calibration.
