Reactive power compensation capacitor | 40kVAr | 440V AC | 3-phase | 657.7μF | Ø136x300mm | 50Hz | for improving the power factor of industrial electrical networks

Technical Specifications

Product type: reactive power compensation capacitor
Compensated reactive power: 40kVAr
Rated voltage: 440V AC
Phases: 3P (three-phase)
Frequency: 50Hz
Rated capacitance: 657.7μF
Rated current: 52.5A
Dimensions: Ø136 x 300 mm
Mounting / installation bolt size: ΦM16 x 25
Operating ambient temperature: -25°C ~ +50°C
Capacitance tolerance: -5% ~ +10%
Permissible maximum overvoltage: 1.1 Un (<8 h per 24 h)
Permissible maximum overcurrent: 1.3 In
Loss tangent: ≤0.001 at 20°C
Insulation resistance between terminals: 2.15 Un / AC, 10 s
Insulation resistance between terminals and housing: 3.5kV / AC, 10 s
Self-discharge characteristic: residual voltage after 3 min. ≤75V
Construction: cylindrical metal housing
Mounting location: compensation cabinets / electrical automation panels 

Functions

Efficient reactive power compensation - designed to compensate small or medium three-phase inductive load installations, reducing unnecessary reactive current flow.
Improvement of the electrical network power factor - improves the cosφ value, making the system more efficient and reducing the total current demand.
Reduction of cable, contactor and transformer load - the compensated system operates more easily, with less heating and lower energy transmission losses.
Voltage stabilization under load - when three-phase motors or fans are frequently started in the facility, the network parameters remain more stable.
Safe technical maintenance - the rapid self-discharge feature allows safer maintenance work after disconnection.
Suitable for automatic compensation systems - perfectly integrated into reactive power banks controlled by cosφ regulators.

Application

For small business or agricultural users: If the facility uses three-phase grain conveyors, water pumps, refrigeration compressors, workshop motors, this capacitor helps reduce the load on the electrical system and improves energy efficiency.
For electricians: A highly relevant component when assembling reactive power compensation cabinets, replacing old burned capacitors, modernizing old electrical panels, and designing step compensation systems.
For engineers / power specialists: Used in cosφ correction projects, transformer load optimization, industrial network energy analysis, and automatic capacitor stage selection.
For manufacturing and industrial facilities: Suitable for ventilation units, pumping stations, elevator equipment, workshop distribution cabinets, compressor rooms.

Advantages

High 440V AC operating voltage
Reliable three-phase industrial model
Low energy loss
High insulation resistance
Safe self-discharge
Compact standard housing
Suitable for automatic cosφ regulators
Long service life for continuous operation

Disadvantages

Requires accurate calculation of network loads
Not intended for direct household single-phase equipment use
Installation must be carried out by a qualified specialist
Mostly used only in professional compensation systems

What is this reactive power capacitor intended for?

This capacitor is intended for reactive power compensation in three-phase electrical networks. It helps reduce unnecessary network load, improves the power factor, and allows more efficient use of electrical energy.

Where is this type of capacitor most commonly used?

It is most commonly used in manufacturing companies, workshops, pumping stations, ventilation systems, compressor rooms, and other facilities where three-phase motors or other inductive equipment are operating.

What benefits does the installation of this capacitor provide?

After installing the capacitor, the reactive load is reduced, the stability of the electrical network improves, energy losses decrease, and additional charges for reactive energy may be reduced.

Is the capacitor safe after disconnection?

Yes, this model has a self-discharge feature, therefore after disconnection the residual voltage decreases to a safer level within a few minutes.