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ELMA ENERGIA

power factor correction

We catch the right phase

Fixed capacitor banks in cubicles AB type

                                                                     

AB-2Y capacitor bank of power 1200kVar/6,3kVwith inrush
current limiting reactors and network parameters’ analyser


General information:

AB type capacitor banks are designed for individual and group power factor correction in medium voltage networks up to 24kV (capacitor banks AB-1: up to 12kV).

Capacitor banks AB are manufactured in following executions:
  • AB-1 - equipped with three-phase capacitors internally connected in delta

  • AB-1Y - equipped with single-phase capacitors connected in star

  • AB-2Y - equipped with single-phase capacitors connected in star with unbalance protection CT

Additional equipment depends on individual specification of the customer and might include i.eg.:
  • power fuses

  • inrush current limiting reactors

  • anti-condensation heaters controlled by humidity and temperature sensors

  • microprocessor protection, providing protections:
    - against internal faults (unbalance protection for AB-2Y capacitor banks, Holmgreen system for AB-1 and AB-1Y capacitor banks),
    - over- and undervoltage,
    - overcurrent.

  • additional incoming cubicle equipped with load-break switch or vacuum circuit breaker and protective circuits' CT's.

Special executions foresee outdoor installation and operation in harsh environmental conditions (high temperature, humidity up to 100%, pollution, heavy dust).
Rated powers and voltages of capacitor banks AB-1Y and AB-2Y make series reactors (protective or in harmonics filtering system) connection possible. Reactors can be assembled on steel constructions or in separate cubicle with forced air cooling system.


General rated data:

Frequency: 50Hz (on request: 60Hz)
Temperature class: -25/B -25°C...+45°C
or -25/D -25°C...+55°C
Permissible voltages: 1,10UN 12h/day
1,15UN 0,5h/day
1,20UN5 minutes
1,30UN 1 minute
Permissible transient overvoltages: 2√2UN
Permissible continuous current: 1,30IN
Permissible short-time overcurrent (0,5 of period) 100IN
Active power losses (without reactors) ≤0,15W/kVar
Discharging devices: discharging to 50V within 5 minutes
Protection degree: IP3X ... IP54
Execution: indoor or outdoor
Electric shock protection system: earthing


Other data:
Type: AB-1 AB-1Y AB-2Y
Rated power: 50...900kVar 75...900kVar 300...2400kVar
Rated voltage: 3...11,5kV 3...24kV
Capacitors: three-phase single-phase single-phase
Connection system: delta star double-star