The MV Equalizer power factor correction system for dynamic loads with extreme fast variations of reactive power demand. It continuously provides real-time response in less than 1 cycle for Reactive Power, Harmonics, Voltage drops, Flickering and as a result supports grid’s stability. The Equalizer system uses ultra-high power medium voltage thyristor switching technology, providing transient free smooth switching by connecting capacitors at zero-crossing.
Elspec MV Equalizer
Description
MV Equalizer – Power Factor Correction System at Medium Voltage
Real time reactive power compensation and power factor correction (PFC) system
The MV Equalizer power factor correction system for dynamic loads with extreme fast variations of reactive power demand. It continuously provides real-time response in less than 1 cycle for Reactive Power, Harmonics, Voltage drops, Flickering and as a result supports grid’s stability. The Equalizer system uses ultra-high power medium voltage thyristor switching technology, providing transient free smooth switching by connecting capacitors at zero-crossing.
Installing the Equalizer system at one or several points of the grid will enhance voltage stability for networks with rapid loads and will prevent machinery downtime. The ability to perform real-time compensation with high efficiency (low losses) makes the Elspec Equalizer one of the most efficient solutions in the market today.
Elspec MV Equalizer solutions are tailor-made for our customers’ specific needs. We offer wide range of MV power factor correction systems up to 115MVAr. The systems can be operated indoor as well as outdoor.
Typical applications
- Power Utilities
- Water Utility’s (water pumps)
- Unbalanced Rapid Loads
- Arc Furnaces
- Wind Farms
- Wood Chippers
- Welding Operations
- Car Crushers and Shredders
- Industrial Mills
- Mining Mills, Shovels and Hoists
- Harbour Cranes
The MV Equalizer control system is equipped with:
- 2 DFR units or more with trigger-free PQZIP technology (Patented) for
- Advanced control
- Recording
- I²t protection
This ability to perform real-time compensation with high efficiency and low losses makes the Elspec Equalizer one of the most efficient solutions in the market today.
Technical Specification
| MV Equalizer | |
| Manufacturer | ELSPEC |
| Enclosure Type | Indoor or Outdoor |
| System Size | 1.5MVAr – 100MVAr |
| Switching | Thyristor Valve |
| Nominal voltage | Up to 22kV |
| Phase & Frequency | 3Ph, 50/60Hz |
| Design Ambient Temperature (Elec. Room) | Indoor/Outdoor : 5 ~ 40 deg. C |
| Design Relative Humidity | Max.95% |
| System Losses | ≤0.8% |
| Protection Degree | IP54 mounting 20FT container or IP21 Indoor |
| Bus material | Copper |
| Thyristor Valve Panel | |
| No of Valves per group | Wye: 3 (1 per phase), Delta 2 |
| Valve continuous current | 150A without cooling, 250A with direct cooling fan |
| Valve rated short time current carrying capacity & duration | 4000Amp during 10mSec |
| Valve Connection / disconnection | Transient free, switching for connection and disconnection one or several groups. Swithching during current zero crossing., with no limitation for number connections. |
| Acquisition time (full compensation to required PF) | One cycle full compensation within 16.6mSec on 60Hz and 20mSec on 50Hz networks |
| PF Rated continuous current | 1.3 x In per capacitor groups |
| Power frequency withstand voltage (kV) | According With IEC 61936-1:2021 For 3.6kV (Um) – 10kV For 7.2kV (Um) – 20kV For 12kV (Um) – 28kV For 17.5kV (Um) – 38kV For 24kV (Um) – 50kV |
| 1.2/50 micosec.impulse volt withstand (kV) | According With IEC 61936-1:2021 For 3.6kV (Um) – 40kV For 7.2kV (Um) – 60kV For 12kV (Um) – 95kV For 17.5kV (Um) – 95kV For 24kV (Um) – 125kV |
| Capacitors | |
| Capacitors rated maximum voltage | 1.1 UN 12 Hours Per Day 1.15 UN 0.5 Hour Per Day 1.2 U 5 Minutes / 200 Times 1.3 U 1 Minute / 200 Times |
| Capacitors peak Current | 100In |
| Reactors | |
| Reactors core type | DRY TYPE |
| Reactors Winding | Enmmeled copper wire |
| Reactors Terminals | Copper bar |
| Reactors Core | Silicon steel |
| Reactors Isolation class | class H, 180C° |
| Detuned factor | 7% / 14% |
| Linearity | 1.8 In |
| Noise | ˂65db |
| Altitute | 1000 Meter |
| Resonance frequency with capacitor bank (Hz) | 50Hz – 189Hz, 60Hz – 227Hz |
| Protection features and indication | |
| Unit protection | DIGITAL RELAY with VCB / P.F |
| Indication for ON/OFF condition of capacitor | On controller LCD screen |
| Trip Interlock for accidental opening of capacitor room | Integral |
| Standards | IEC 62271-1, IEC 62271-200, IEC 60871-1-2014, IEC/EN60076-6, EN61558-2-20, IEC 61936-1:2021, IEC60044-1, GB20840.1-2010, GB20840.2-2014 Safety: ENA61010-1, ENA60439-1, UL-508 EMC: EN50081-2, EN50082-2,EN51000-4-2/3/4/5, ENV50204,ENV50141 |
| LV Control Panel | |
| EQ Controller (G3) | |
| Response Time | Real Time full compensation with acquisition time od 1 cycle maximum |
| Elspec Digital Fault Recorder No’ 1 | |
| General | One year cycle by cycle contineus waveform recording of all three phases (mains, load, and capacitors) |
| Standards | Refer to Multi Functional recording specification |
| Scada | Refer to Management software specification |
| Elspec Digital Fault Recorder No’ 2 | |
| General | One year cycle by cycle recording of all three phases on each group. I²t equivalent protection for each thyristor vlave (two phases on each group) |
| Standards | Refer to Multi Functional recording specification |
| Scada | Refer to Management software specification |
Downloadable Files
Elspec MV Medium Voltage Equalizer Power Factor Correction Datasheet
