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Current measuring transformers ТФЗМ

Oil-filled current transformers are designed to convert and transmit measurement signals to metering devices, protection, automation, signaling, and control instruments in alternating current circuits of industrial frequency. They are used in 110 and 220 kV power networks.

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Description

Characteristic

Technical Specifications - 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 / Rated multiplication factor 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 design О1 according to ГОСТ 15150-69, range: -60 to +55 °C.
Altitude above sea level, m: 1000/2000/3000.

Technical Specifications - 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 / Rated multiplication factor 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