Outdoor Epoxy Current Transformers

Current transformer (CT) is used for measurement of Current & protection of major components and to provide continuity of operation in power system. When current in a circuit is too high to directly apply to measurement or protection relays, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. Current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit. It commonly used in metering and protective relays in the electrical power industry.

EMEK manufactures oil/paper insulated instrument transformers up to 550kV nearly 100.000 units since 1969.

Features of this design and contraction include:

  • Hermetically Sealed Construction

  • High Seismic Performance

  • Stainless Steel, Aluminium and/or Hot deep galvanized metal parts

  • Durability in extreme weather conditions

  • Long life time expectancy

Frequency : 50Hz, 60Hz

Standards : TSE, IEC, ANSI, GOST, BS&AS and other standards upon request

Indoor or outdoor cyclooliphatic epoxy resin is used. Hydrophobic.

Maintenance : Maintenance free

Spare Parts : No special tools, no serviceable parts or spare parts are required. (HKEP) material can be used if required.

Types Highest System Voltage One minute power frequency voltage Lightning impulse voltage Rated frequency Short time thermal current Dynamic withstand current Primary Current (A) Rated Continuous Thermal Current Minimum Creepage Distance (mm/kV) Service Condition
HKA-20/HKA-20B 24 kV 50 kV rms 125 kV Peak 50/60Hz 40kA rms/3 sec 100 2000 from 1.2ln 20/25/31mm/kV Outdoor
HKA-20Y 24 kV 50 kV rms 125 kV Peak 2000 from 1.2ln 20/25/31mm/kV Outdoor
HKA-30/HKA-30Y/HKA-36B 36 kV 70 kV rms 170 kV Peak 3000 from 1.2ln 20/25/31mm/kV Outdoor
HKA-30BY 36 kV 70 kV rms 170 kV Peak 3000 from 1.2ln 20/25/31mm/kV Outdoor
HKA-30Y 36 kV 70 kV rms 170 kV Peak 3000 from 1.2ln 20/25/31mm/kV Outdoor