HV current transformers CT
Application and construction
Catalogue
These instruments current transformers are intended for measuring and protection of high-voltage distribution systems of the indoor as well as outdoor type, for the highest voltage of the system of 3.6 – 40.5 kV. More detailed data about the offered products can be found in below tables.
The transformers comply with requirements of IEC 60044-1, IEC 60044-2, ČSN EN 60044-1, ČSN EN 60044-2, GOST 1983-89 and DIN 42600/1983.
Installation instructions
The mounting position of the instrument transformers CTS is arbitrary. The transformers CTSO, CTO are mounted in the vertical position. The transformers are fixed by the means of four screws M10 (CTS 12) or M12 (CTS 25, CTS 38, CTSO 38) in the holes in the basic plate or in the profiles.The connection of the power circuit to the primary terminals is done by the means of the screws M12 (See picture No.1) with max. torque module 30Nm.We recommend use terminal ends corresponding to the used cross-section of the conductor (its maximum size is 10 mm2) for attaching to the secondary outlets.Metal functional parts of the transformer are coated against corrosion. The primary terminals are galvanized with nickel or silver-plated. The secondary terminals are galvanized with nickel. The basic plates are cold galvanized (transformers for the indoor settings) or hot galvanized (transformers for the outdoor settings).
We recommend clean transformers from dirt and draw close the connections in case of shut down.
OUTDOOR types
Type | PDF | Insulation voltage UN [V] | Primary current IN [A] | Secondary current IN [A] | Power [VA] | Weight [kg] |
CTSO 38 |
-
| 38,5 | 5-2500 | 5 (1) | 5-60 | 62 |
CTO 15 |
-
| 25 | 5-600 | 5 (1) | 5-60 | 30 |
INDOOR types
Type | PDF | Insulation voltage UN [V] | Primary current IN [A] | Secondary current IN [A] | Power [VA] | Weight [kg] |
CTS 12 |
-
| 17,5 | 5-3200 | 5 (1) | 5-60 | 22 |
CTS 25 |
-
| 25 | 5-3200 | 5 (1) | 5-60 | 28 |
CTS 38 |
-
| 40,5 | 5-1250 | 5 (1) | 5-60 | 40 |