c3115

Medium voltage power capacitors

ZEZ-SILKO_small

Application
The capacitors are designed for power factor correction and harmonics filtration at medium voltage. They are all-film dielectric – polypropylene foil impregnated with an environmentally friendly, non-toxic biodegradable insulating oil. There is the aluminium foil as the electrodes. This construction assures minimal looses of the capacitors. Three-phase units are in star – Y connection, single-phase units are in I connection. The capacitors have internal discharge resistors.

 

Installation instruction

  • Impregnant is free from PCB and is completely non-toxic. It is very stable over a wide operating temperature range
  • All three-phase and single-phase units are in dead case
  • Single-phase units are available with two bushings or connected with a single bushing and live case
  • Low voltage pressure sensor 230 V, 50 Hz available
  • Terminal cover IP42 available
  • Stainless steel case, paint finish. For indoor/outdoor installation
  • Max torque – hollow studs M12 – 10 Nm
  • Max torque – earth connection M10 – 7 Nm

Technical data

Rated voltage: UN Three-phase 1-24 kV 25 … 1000 kvar
Single-phase 1-15 kV 25 … 1000 kvar
Frequency: fN 50/60 Hz
Standards: IEC 60871-1: 1997 EN 60871-1: 1997 EN ČSN 60871-1; 1999
IEC 60871-4: 1997 EN 60871-4: 1997 EN ČSN 60871-4; 1999
Max overvoltage: Umax UN + 10 % (up to 8 hours daily)
UN + 15 % (up to 30 minutes daily)
UN+ 20 % (up to 5 minutes)
UN + 30 % (up to 1 minute)
Overcurrent (according to above standards): IS 1,3 * IN
Capacitance tolerance: -5 / +10 %
Test voltage, terminal/terminal: UTT 2,15 * UN, AC, 10 s or 4,3 * UN DC, 10 s
Test voltage, terminal / case: UTC According to relevant IEC standard for 10 s
Inrush current: Max 300 x IN
Dielectric losses: tan δ cca 0,07 W/kvar
Statistical life expectancy: > 130 000 hours
Degree of protection: IP 00, on request IP 42, indoor and outdoor
Ambient temperature category: -50 °C / C

– maximum is 50 °C (higher temp. on request)
– highest mean over any period of 24 h is 40 °C
– highest mean over any period of 1 year is 30 °C
Cooling: naturally air cooled
Permissible relative humidity: IP00-max. 95 %, IP42-max. 95 %
Max above sea level: 4 000 m above sea level
Mounting position: vertical
Mounting: Side brackets, bottom brackets
Case: Stainless-steel, for indoor/outdoor installation
Dielectric: All-film
Impregnant: JARYLEC (environmentally friendly, non toxic, non PCB)
Discharge resistors: Included – 75 V, 10 minute

 

Technical details

Installation instruction

  • Impregnant is free from PCB and is completely non-toxic. It is very stable over a wide operating temperature range
  • All three-phase and single-phase units are in dead case
  • Single-phase units are available with two bushings or connected with a single bushing and live case
  • Low voltage pressure sensor 230 V, 50 Hz available
  • Terminal cover IP42 available
  • Stainless steel case, paint finish. For indoor/outdoor installation
  • Max torque – hollow studs M12 – 10 Nm
  • Max torque – earth connection M10 – 7 Nm