Capacitive Voltage Transformers (CVTs) have been widely used within transmission power systems for applications ranging from high-voltage to ultra high-voltage. CVTs are primarily used for voltage measurement, providing voltage signals to metering units, protection relay devices, and automatic control devices.
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
Insulators: Porcelain or Composite Polymer Insulators
Insulating Oil: Mineral oil in conformity with standards in EMU and synthetic in capacitor unit.
Maintenance: Maintenance free
Spare Parts: No special tools, no serviceable parts or spare parts are required
|Highest System Voltage||72,5 kV||123 kV||145 kV||170 kV||245 kV||300 kV||362 kV||420 kV|
|One minute power frequency voltage||140 kV rms||230 kV rms||275 kV rms||325 kV rms||460 kV rms||460 kV rms||510 kV rms||630 kV rms|
|Lightning impulse voltage||325 kV Peak||550 kV Peak||650 kV Peak||750 kV Peak||1050 kV Peak||1050 kV Peak||1175kV Peak||1425kV Peak|
|Rated frequency||50/60 Hz||50/60 Hz||50/60 Hz||50/60 Hz||50/60 Hz||50/60 Hz||50/60 Hz||50/60 Hz|
|Short time thermal current||50kA/3sec||50kA/3sec||50kA/3sec||50kA/3sec||50kA/3sec||50kA/3sec||50kA/3sec||50kA/3sec|
|Dynamic withstand current||125kA, peak||125kA, peak||125kA, peak||125kA, peak||125kA, peak||125kA, peak||125kA, peak||125kA, peak|
|Total Creepage Distance||25/31mm/kV||25/31mm/kV||25/31mm/kV||25/31mm/kV||25/31mm/kV||25/31mm/kV||25/31mm/kV||25/31mm/kV|
Secondary Voltage -100/√3, 110/√3, others on request.
Rated Voltage Factor 1.2xUm cont/1.9 for 30s – 1.9 for 8h – 1.5 for 30s
Secondary Terminal Box
Spare Part & Special Tools
Emek is a labor-independent, internationally operating manufacturer of instrument transformers.
Its reliable and high quality products have been repeatedly tested in local and international laboratories. Its experience has been strengthened with transformers working in the system for half a century, it has improved and renewed itself every day.