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GRIDVAR-G
Standard Series

Advanced IGBT, 3-Level topology. 400V and 690V support. 30 – 100 kvar per module (400V) / up to 200 kvar (690V), 20 modules in parallel. Proven active SVG for the full range of industrial applications.

400V / 690V Up to 100 kvar / module (400V) ≤ 50 µs instant / ≤ 5 ms total > 97.5% efficiency 2nd – 25th harmonic −20°C ~ +55°C
Stepless reactive compensation
400V and 690V operation
≤ 5 ms total response
Up to 20 modules parallel
3-Phase load balancing
Division 02 — Active Power Quality

Proven active compensation
for general industry

GRIDVAR-G is the cost-effective entry point into Forte's active SVG 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's primary function is reactive power compensation. It suppresses harmonics (2nd–25th) by the same method an AHF uses, but only to the extent of its residual capacity — this is not its primary function and it may not reach the performance of a dedicated AHF. Where dedicated harmonic filtering is required, GRIDSINE-G is ordered separately.

400V and 690V Harmonic suppression — residual capacity 20 modules parallel ≤ 5 ms response > 97.5% efficiency −20°C ~ +55°C
GRIDVAR-G Module — Front View
GRIDVAR-G Module — Side View
GRIDVAR-G Module — Detail View
≤5 ms
Total response time
(≤ 50 µs instant)
100 kvar
Max capacity per module
(400V) / 200 kvar (690V)
>97.5%
System efficiency
(3-level IGBT topology)
−20°C
Minimum operating
temperature
Technical Specifications

GRIDVAR-G — Full Specification

All parameters from the official Forte engineering datasheet. Available in both 400V and 690V system configurations.

ParameterSpecification
Product seriesGRIDVAR-G — Standard Active SVG
Power electronics technologyAdvanced IGBT, 3-Level Topology
FunctionSVG (Reactive Power Compensation) — primary. Harmonic filtering and unbalance correction to the extent of residual capacity. LT & HT current sensing supported.
Operating voltage400V (300~456V), 690V available
Frequency50 / 60 Hz
Connection type3P3W / 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 frequency25.6 kHz
Active power loss≤ 2.5%
System efficiency> 97.5%
Power factor targetAdjustable −1 to 1 (cosφ = 1.00 achievable)
Filtering efficiency≥ 98% (typical harmonics)
Harmonic reduction ratio≥ 98% (fundamental harmonics)
Harmonic filtering range2nd – 25th harmonic (active mode)
THDi≤ 5% (at rated load)
Neutral current (4-wire)3× rated current
3-Phase load balancingYes — active phase balancing (≤ 5% residual unbalance)
Max. parallel modulesUp to 20 modules — Master/Slave or Master/Master
Overload capacity110% continuous / 120% for 1 minute
Operating temperature−20°C ~ +55°C
HumidityMax 95% (non-condensing)
Altitude≤ 2000 m full load; 1% derating per 100 m above
Noise level< 60 dB (< 45 dB at low speed)
CoolingForced fan cooling (smart speed control)
Communication interfaceRS485, CAN Bus, Modbus RTU, Mobile APP, 4.3" / 7" / 10" TFT LCD (optional)
HMI (optional)4.3″ / 7″ / 10″ TFT LCD
Compensation typeCapacitive and inductive
MountingRack / Wall-mount / Freestanding
IP protectionIP20 ~ IP54
StandardsIEC 61000-3-4 / IEC 61439-1
CertificationsCE · Type Test · ISO 9001:2015
Key Features

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.

Module Variants

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.

30
kvar
400V3P3W/4WIP20~IP54
50
kvar
400V3P3W/4WIP20~IP54
75
kvar
400V3P3W/4WIP20~IP54
100
kvar
Most specified
400V / 690V3P3W/4WIP20~IP54

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

Hybrid Compatibility

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.

Existing Infrastructure

GRIDFIX Passive Stage

Your existing thyristor-switched capacitor/reactor banks handle high-power stable loads economically. Capital investment retained — no replacement required.

Add GRIDVAR-G

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.

Best entry-level hybrid option
New Capability

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.

Applications

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.

Need tighter space, higher cabinet capacity or broader harmonic filtering (2nd–51st)? Compare GRIDVAR-G with the Compact and SiC tiers.

Compare all GRIDVAR models

Ready to specify GRIDVAR-G for your project?

Our engineering team will size the correct module capacity and panel configuration based on your facility's load profile — at no cost before commitment. 400V and 690V projects welcome.

Documents

Technical documents for this product. Ask for a document still in preparation and we will send it as soon as it is ready.

Request a Quote — GRIDVAR-G

Our engineering team will contact you within 1 business day. Urgent: +90 850 840 64 24

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