Proven active compensation
for general industry
GRIDVAR-G is the cost-effective entry point into Forte's active SVG and AHF product family — built on a proven Advanced IGBT, 3-Level topology that delivers stepless reactive power compensation and harmonic filtering across 400V and 690V industrial systems.
With up to 100 kVAr per module at 400V (200 kVAr at 690V) and support for 20 modules in parallel, GRIDVAR-G scales to meet the reactive demand of a single motor feeder or an entire production facility. The operating temperature range of −20°C to +55°C suits most industrial environments.
GRIDVAR-G simultaneously performs SVG reactive compensation and AHF harmonic filtering (2nd–25th harmonic) in a single module — eliminating the cost and footprint of separate systems.
(≤ 50 µs instant)
(400V) / 200 kVAr (690V)
(3-level IGBT topology)
temperature
GRIDVAR-G — Full Specification
All parameters from the official Forte engineering datasheet. Available in both 400V and 690V system configurations.
| Parameter | Specification |
|---|---|
| Product series | GRIDVAR-G — Standard Active SVG / AHF |
| Power electronics technology | Advanced IGBT, 3-Level Topology |
| Function | Reactive power / Harmonic filtering / Unbalance correction — configurable modes, simultaneous operation. LT & HT current sensing supported. |
| Operating voltage | 400V (300~456V), 690V available |
| Frequency | 50 / 60 Hz |
| Connection type | 3P3W / 3P4W / Single Phase |
| Module capacity options (400V) | 30 · 50 · 75 · 100 kVAr |
| Module capacity options (220V) | 10 · 20 · 30 · 40 · 50 kVAr |
| Module capacity options (690V) | 150 · 175 · 200 kVAr |
| Response time | ≤ 50 µs (instant) / ≤ 5 ms (total) |
| Switching frequency | 25.6 kHz |
| Active power loss | ≤ 2.5% |
| System efficiency | > 97.5% |
| Power factor target | Adjustable −1 to 1 (cosφ = 1.00 achievable) |
| Filtering efficiency | ≥ 98% (typical harmonics) |
| Harmonic reduction ratio | ≥ 98% (fundamental harmonics) |
| Harmonic filtering range | 2nd – 25th harmonic (active mode) |
| THDi | ≤ 5% (at rated load) |
| Neutral current (4-wire) | 3× rated current |
| 3-Phase load balancing | Yes — active phase balancing (≤ 5% residual unbalance) |
| Max. parallel modules | Up to 20 modules — Master/Slave or Master/Master |
| Overload capacity | 110% continuous / 120% for 1 minute |
| Operating temperature | −20°C ~ +55°C |
| Humidity | Max 95% (non-condensing) |
| Altitude | ≤ 2000 m full load; 1% derating per 100 m above |
| Noise level | < 60 dB (< 45 dB at low speed) |
| Cooling | Forced fan cooling (smart speed control) |
| Communication interface | RS485, CAN Bus, Modbus RTU, Mobile APP, 4.3" / 7" / 10" TFT LCD (optional) |
| HMI (optional) | 4.3″ / 7″ / 10″ TFT LCD |
| Compensation type | Capacitive and inductive |
| Mounting | Rack / Wall-mount / Freestanding |
| IP protection | IP20 ~ IP54 |
| Standards | IEC 61000-3-4 / IEC 61439-1 |
| Certifications | CE · Type Test · ISO 9001:2015 |
What Makes GRIDVAR-G the Right Choice
Cost-effective, wide-ranging and proven — GRIDVAR-G delivers active compensation where a standard IGBT platform is exactly what the application requires.
400V and 690V Operation
GRIDVAR-G is the only model in the GRIDVAR range supporting 690V systems natively — ideal for steel and cement plants, large pumping stations and industrial drives that operate at 690V busbar voltage.
3-Level IGBT Topology
The 3-level topology delivers >97.5% system efficiency and reduces switching harmonics compared to 2-level designs — producing cleaner output current with lower distortion injection into the grid.
Wide Temperature Range
Operating from −20°C to +55°C, GRIDVAR-G suits the full range of industrial environments — from climate-controlled production halls to outdoor substation enclosures.
Stepless Compensation — Zero Blind Spots
Unlike thyristor-switched passive banks, GRIDVAR-G produces exactly the reactive current required at every instant — for example 37.4 kVAr — with zero over- or under-compensation and no dead-band.
Wide Scalability
From 30 kVAr single-feeder compensation to large multi-module installations. Up to 20 GRIDVAR-G modules can operate in parallel — Master/Slave or Master/Master — scaling output to meet growing reactive demand.
Hybrid (SVGC) Compatible
GRIDVAR-G integrates directly with existing GRIDFIX passive stages as a hybrid SVGC system — adding active dynamic compensation to cost-effective LC base capacity. No replacement of existing infrastructure required.
400V Module Options — 4 Capacities
Four 400V module sizes cover the majority of industrial applications. 690V modules (150 / 175 / 200 kVAr) available separately. Up to 20 modules in parallel.
All modules: Advanced IGBT 3-Level · 25.6 kHz · RS485, CAN Bus, Modbus RTU, Mobile APP, 4.3" / 7" / 10" TFT LCD (optional) · IEC 61000 / IEEE 519
SVGC — Active + Passive in One System
Add GRIDVAR-G to your existing GRIDFIX passive compensation system to create an SVGC hybrid — eliminating blind spots and achieving unity power factor at the lowest capital cost.
GRIDFIX Passive Stage
Your existing thyristor-switched capacitor/reactor banks handle high-power stable loads economically. Capital investment retained — no replacement required.
SVGC Hybrid Result
GRIDVAR-G fills every compensation blind spot left between LC steps — steplessly, in ≤ 5 ms. Result: unity power factor, harmonic suppression and 3-phase balance, all from a single added module.
GRIDVAR-G Module
Compensates dynamic load changes and residual reactive demand steplessly. Suppresses 2nd–25th harmonics and eliminates 3-phase imbalance that passive stages cannot address.
Where GRIDVAR-G Is Specified
From general manufacturing to outdoor high-voltage substations — wherever proven active compensation at 400V or 690V is required.
Plastics & Injection Moulding
Rapid cycle reactive demand from injection machines. Stepless compensation eliminates utility penalties without fixed-step overshoot.
Textiles
Weaving, knitting and dyeing drives. Continuously varying reactive demand requires active tracking — not stepped switching.
Food & Beverage
Conveyor systems, refrigeration compressors and mixing drives. 690V bus support for large motor feeders.
General Manufacturing
Machining centres, hydraulic presses and assembly lines. Wide temperature range for both air-conditioned and industrial environments.
Pumping Stations
Large pump motors at 690V. GRIDVAR-G provides reactive support without the resonance risk of capacitor banks on the 690V bus.
Crane & Material Handling
Hoist and travel drive reactive swings. ≤ 5 ms response tracks load changes faster than the mechanical cycle.
Commercial Buildings
Chiller plant, escalators and lifts. GRIDVAR-G as a drop-in SVG panel replaces traditional capacitor bank compensation.
Renewables
Wind and solar plant auxiliary systems. Wide temperature range suits outdoor substation rooms in cold or hot climates.