The CTS type medium voltage post insulator current transformers manufactured by KBP Intra Sro (Czech Republic) meet the highest quality requirements.

This current transformer has been designed for indoor use on medium voltage networks. The dimensions of the device comply with relevant DIN 42600-8 standard specifications. The cast resin insulation of this current transformer is an epoxy mix which is an insulant featuring extremely good mechanical properties. The current transformer is available with one, two or three secondary windings. Versions that are reconnectable on the primary and secondary side are also available. The secondary windings are led out to a terminal board. The secondary terminal board has a lockable plastic cover. Secondary cable entry to the secondary terminals is possible through 1 pc of Pg16 packing gland.

The current transformer has a galvanized metallic structure resistant to corrosion. Its connector normally designed for earthing is equipped with a durable marking in accordance with relevant specifications.

The device is constructed in such a way that its structure cannot be dismantled and its nameplate cannot be replaced without damaging the calibration mark. The current transformer withstands thermal and dynamic impacts caused by an external short-circuit for a period set out in relevant standard.

All components, materials and parts used during the manufacturing process comply with all relevant standards being currently effective and with the generally recognized technical rules. The product does not contain any material containing PCB or asbestos, halogenated hydrocarbons and any other hazardous material to be mandatorily furnished with a descriptive symbol.

The current transformer is type tested according to EN 61869-1 and EN 61869-2 standards.

Current transformers used for metering for accounting are calibrated by MKEH (Hungarian Trade Licensing Office), Authority of Metrology.

Downloadable catalog:

Medium voltage instrument transformers catalogue

Main technical specifications

Maximum voltage: 12/17.5 kV, 24/25kV, 36/38,5kV
Power frequency withstand test voltage: 28/38 kV, 50kV, 70/80kV
Impulse withstand test voltage: 75/95 kV, 125kV, 170/180 kV
Nominal primary current: 5 – 2500 A
Nominal secondary current: 5 (1) A
Rated short time withstand current: 80 kA/1s (31,5 kA/3s)
Dynamic limiting current: max 200 kA
Rated continuous thermal current: 120% In
Accuracy class – measuring core: 0.2S, 0.2, 0.5S, 0.5, 1, 3
Instrument safety factor – measuring core: FS 5, FS 10
Number of cores with calibration capability: 3 (for versions 12/17.5 kV, 24/25kV only)
Accuracy class – protection core: 5P, 10P, PX
Accuracy limit factor – protection core: 5, 10, 15, 20, 25, 30
Power: 5 – 60 VA
Frequency: 50 Hz
Insulation temperature class: E
Operating temperature: -5 to + 40 °C
Storage temperature: -50°C to +60°C
Standards: EN 60044-1, EN 61869-1, EN 61869-2, GOST 15 150