The TZLMA-1-1 current instrument transformer is intended for to be used as a power source to supply protection relays circuits which protect the cores of a three-phase cable from earth connection, by transforming the zero components arising during the earth connection.
The transformer is intended for mounting into the KRZ power distribution system designed for up to 0,66 kV. The transformer meets the requirements of GOST 12.2.007.0-75 standard.
The TZLMA-1-1 current instrument transformer is intended for to be used as a power source to supply protection relays circuits which protect the cores of a three-phase cable from earth connection, by transforming the zero components arising during the earth connection.
The transformer is intended for mounting into the KRZ power distribution system designed for up to 0,66 kV. The transformer meets the requirements of GOST 12.2.007.0-75 standard.
The transformer features the “U” climatic execution, corresponds to the location 2 category to GOST 15150, is installed by slipping over a cable, and is intended for to be operated under the following conditions:
The warranty period is one year from placing the transformer into service, however up to three years since the moment of its dispatch from the manufacturer´s plant.
Note: * the sensitivity value applies to relay windings connected in parallel, and the resistance of connection wires of 1 Ω, at maximum.
The secondary winding outlets are labelled as „I1“ and I2“.
The transformer base plate contains two Ø 11 mm openings to attach the transformer at the installation place.
ATTENTION! MEASURES ARE TO BE TAKEN FOR THE TZLMA-1-1 TRANSFORMER IN OPERATION TO PREVENT THE OPENING OF ITS SECONDARY WINDING OUTLETS.
If the operation of the transformer becomes no longer to be necessary, its secondary winding has to be short circuited.
The earthing variant of the secondary winding is determined by the user, depending on how the transformer secondary side is connected. The metallic cover and the cable armour have always to be earthed.
Contour dimensions, installation, connecting dimensions and weight of the TZLMA -1-1 transformer.
Highest voltage for equipment: | 0,66 kV |
Power frequency test voltage: | 3 kV |
Nominal primary current: | 25 A |
Nominal secondary current: | 1 A |
Nominal frequency: | 50 Hz |
Weight: | 3,1 kg |
Thermal insulation class: | E |
Operation conditions: |
operating temperature from -45°C to +55°C |
Standard: | ГОСТ 15150, ГОСТ 15543.1 |