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TFZM instrument current transformers

Oil-immersed current transformers for measurement are designed to convert and transmit measuring signals to metering, protection, automation, signalling and control devices in AC systems at industrial frequency. Suitable for use in 110 and 220 kV power networks.

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Description

Characteristic

Technical Characteristics - 110
Parameter	Value
Primary currents, A	0.5 to 8000
Secondary currents, A	5 and 1
Maximum operating voltage, kV	126
Thermal withstand current, kA	50/3s
Electrodynamic withstand current, kA	125
Accuracy class / Safety factor of measuring windings	0,2s; 0,2; 0,5s; 0,5; 1; 3/(5-10)
Accuracy class / Accuracy limit factor (ALF) of protection windings	5Р; 10P/(5-30)
Rated secondary loads	-
Measuring windings, V∙A	10; 15; 20; 30; 40; 50
Protection windings, V∙A	10; 15; 20; 30; 40; 50
Rated frequency, Hz	50; 60
Weight, max, kg	475
Oil weight, kg	80

Climatic category O1 according to GOST 15150-69, operating temperature range from −60 to +55 °C.
Altitude above sea level, m: 1,000 / 2,000 / 3,000

Technical Characteristics - 220
Parameter	Value
Primary currents, A	0.5 to 8000
Secondary currents, A	5 and 1
Maximum operating voltage, kV	252
Thermal withstand current, kA	63/3s
Electrodynamic withstand current, kA	160
Accuracy class / Safety factor of measuring windings	0,2s; 0,2; 0,5s; 0,5; 1; 3/(5-10)
Accuracy class / Accuracy limit factor (ALF) of protection windings	5Р; 10P/(5-30)
Rated secondary loads	-
Measuring windings, V∙A	10; 15; 20; 30; 40; 50
Protection windings, V∙A	10; 15; 20; 30; 40; 50
Rated frequency, Hz	50; 60
Weight, max, kg	550
Oil weight, kg	180

Climatic category O1 according to GOST 15150-69, operating temperature range from −60 to +55 °C.
Installation altitude above sea level, m: 1,000 / 2,000 / 3,000