Dear partners, in the period 19.12.2022 – 4.1.2023 production in our company will be stopped. The last date for the expedition will be 19.12.2022. Production will start on 4.1.2023.

Current instrument cumulative transformer CTR 1

Drawing cumulative instrument current transformer CTR-1 is designed for the protection of distributive arrangementsof high voltage of the inner design. The primary currents are currents of difference of the individual parts within the states of disorders, for example earth connection.

Drawing cumulative instrument current transformer CTR-1 is designed for the protection of distributive arrangementsof high voltage of the inner design. The primary currents are currents of difference of the individual parts within the states of disorders, for example earth connection.

The primary currents can have the value of 10 A and more according to the request of customer. The value of the secondary current is min. 0.08 A (it can be higher according to the request of customer).The transformers CTR-1 are designed as drawingtransformers. The inner hole of cavity has diameter 160 mm. The secondary winding is winded on the magnetic core made of orientated plates.

All active parts of the transformer are filled with the epoxy mixture. This mixture has both the electro-insulating and mechanical functions. The mounting position of the transformers is arbitrary. Transformers are fitted by the means of four screws M12in the holes in the basic plate. 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”).

Highest voltage for equipment: 0.72 kV
Power frequency test voltage: 3 kV
Nominal secondary current: 5 (1) A
Nominal power: 0,1 VА (15 Ω)
Nominal frequency: 50 Hz
Weight: 18 kg
Thermal insulation class: E
Operation conditions: 

operating temperature from -5 to + 40 °C

corresponds to temperature class -5/40 according to IEC 61869-1

Standard: ČSN EN 60044-1, IEC EN 60044-1, ČSN EN 61869-1, ČSN EN 61869-2, IEC EN 61869-1, IEC EN 61869-2, GOST 15 150