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What Is A Square Power Capacitor?

A Square Power Capacitor is a mainstream low-voltage enclosed reactive power compensation capacitor with a rigid square metal housing. Different from cylindrical capacitors, this square-type power capacitor adopts a flat square structural design, taking on a regular cuboid shape that perfectly fits the internal spatial layout of standard low-voltage distribution cabinets. It takes high-quality metallized polypropylene film as the internal dielectric material, matched with environmentally friendly insulating resin for full sealing and filling.
Manufactured with mature winding and welding technology, the Square Power Capacitor is integrated with safety protection components such as pressure relief valves and built-in discharge resistors.

Core Functions of a Square Power Capacitor

Fonction principaleGamme de données universelleAvantage de l'application
Correction du facteur de puissanceOptimize power factor from 0.68 to 0.97+Avoid reactive power fine and reduce enterprise electricity cost
Grid Line Loss ReductionCut down line active loss by 9%-16%Minimize heat loss of power transmission lines
Voltage Fluctuation SuppressionControl voltage deviation within ±4%Stabilize terminal voltage for inductive electrical equipment
Low-order Harmonic PurificationSuppress 3rd/5th harmonic below 4.5%Reduce harmonic damage to cables and electrical components
Cabinet Space UtilizationImprove cabinet space utilization by 25%Suitable for dense assembly of multiple capacitors

Types of Square Power Capacitors We Offer

Condensateur de puissance basse tension

Condensateur de puissance à facteur triphasé basse tension (type anti-harmonique)

condensateur de puissance

Condensateur de puissance à facteur triphasé basse tension (type auto-réparateur)

Condensateur de puissance basse tension

Condensateur de puissance shunt basse tension à phase séparée

Tableau des spécifications techniques

This table helps engineers and procurement teams quickly match the right square power capacitor to their system requirements.

Point techniqueDonnées de spécification universelles
Tension de service nominale400V, 450V, 500V, 525V
Fréquence nominale50Hz / 60Hz (Dual Frequency)
Capacité d'une seule unité10kvar - 60kvar (Customizable)
Tolérance de capacité-3% ~ +3%
Tangente de perte (tanδ)≤0.0009 (25℃ Constant Temperature)
Internal ConfigurationBuilt-in discharge resistor & pressure relief valve
Matériau de la coqueGalvanized Steel / Aluminum Alloy Square Shell
Altitude de travail≤1200m
Température de fonctionnement-25℃ ~ +55℃
Durée de vie théorique12 Years Standard Service Lifespan

Applications industrielles

Where Our Square Power Capacitor Delivers Proven Results

A high-performance Square Power Capacitor cannot adopt generalized fixed design, as low-voltage power distribution cabinets have different assembly density and load operation modes. Our square-shaped power capacitor is professionally engineered for standardized cabinet installation scenarios. It effectively helps industrial users cut down extra reactive energy penalties, maintain stable grid voltage amid frequent load changes, and minimize low-order harmonic distortion in three-phase power loops.

Why Choose ZHIMING's Square Power Capacitor?

Standardized Square Structural Layout

ZHIMING Square Power Capacitor adopts regular square shell with unified industrial size. It fits perfectly with international standard distribution cabinets, supports dense arrangement and combined installation, and makes internal cabinet wiring neater and more orderly.

Premium Self-healing Dielectric Material

This square capacitor uses high-toughness metallized polypropylene film. With excellent self-healing performance, it can repair tiny breakdown points caused by instantaneous voltage surge, avoiding permanent failure and extending service life.

Multi-layer Safety Protection System

Equipped with mechanical pressure relief valve, overcurrent protection and built-in rapid discharge resistor. When abnormal pressure or overvoltage occurs inside the device, it will automatically cut off the circuit to prevent bulging and leakage risks.

Excellent Sealing & Insulation Performance

Adopt integral sealing process with environmentally friendly resin filling. The square shell has strong compression resistance, effectively isolating external dust, moisture and corrosive gas, adapting to complex indoor industrial environments.

Stable Compensation & Low Energy Consumption

Optimized internal winding structure reduces dielectric loss. The capacitor maintains stable reactive power output for a long time without performance attenuation, effectively reducing no-load loss of the power grid.

Cost-effective & Easy Maintenance

The rugged square shell structure is resistant to collision and deformation during transportation and installation. It adopts maintenance-free design, requiring no daily manual maintenance to save later operating investment.

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It is widely applied in 400V low-voltage three-phase power systems, suitable for industrial production workshops, shopping malls, office buildings, pumping stations and automated production lines. It is mainly used for centralized reactive power compensation of distribution cabinets.
The square structure features neat edges and fixed size, which is more suitable for dense assembly in standard cabinets. It has higher space utilization rate, easier stacking and installation, and is more friendly for large-scale combined compensation projects.
Yes. The fully sealed integrated structure has excellent dustproof and moistureproof capability. The solid metal shell prevents external impurities from entering the interior, ensuring stable operation in dusty and dry industrial environments.
Definitely allowed. The standardized size and uniform heat dissipation design support parallel combination installation. Users can freely match capacitors with different capacities according to actual power compensation requirements.
We provide 3-year quality warranty and lifelong free technical consultation. For bulk order customers, we support customized capacity and voltage parameters, and provide professional power grid compensation scheme matching service.

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