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SET 525V low voltage power capacitor
Power Capacitor

SET 525V Low Voltage Power Capacitor, 10–50 kVAR

Model: SET-CAPD-525-3-B

SET-CAPD 525V cylindrical low-voltage power capacitors, 10–50 kVAR, for higher-voltage and detuned power-factor correction systems.

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525V Power Capacitor for Industrial Power-Factor Correction

525V power capacitor from SET is designed for low-voltage distribution panels that need stable reactive-power compensation. The 10–50 kVAR range improves power factor, reduces line losses and releases transformer capacity. It uses self-healing metallized film and discharge protection.

SET 525V power capacitor 10-50 kVAR

See the IEC standards for capacitor design and testing.

SET Power Capacitor

525V Low Voltage Power Capacitor

10–50 kVAR cylindrical capacitor series for efficient power-factor correction, reduced line losses and dependable reactive-power compensation.

IEC 60831-1Design standard
≤0.0015Dielectric loss tan δ
110%Maximum voltage
130%Maximum current

Product Overview

SET-CAPD 525V low-voltage power capacitors are designed for indoor AC power systems below 1000V. They supply reactive power locally, improve power factor and reduce unnecessary current, cable losses and transformer loading. Selected for higher-voltage capacitor banks and detuned systems where extra voltage margin is required.

The cylindrical aluminium housing combines compact installation with reliable heat dissipation. Metallized polypropylene film provides low dielectric loss and self-healing performance. A built-in discharge resistor and over-pressure disconnector add essential operating protection for capacitor-bank service.

Why Choose SET-CAPD

Low-loss self-healing film

High-reliability metallized polypropylene insulation limits temperature rise and restores small dielectric weak points during normal service.

Integrated safety protection

Over-pressure protection disconnects the element at end of life, while the internal resistor discharges residual voltage after switching off.

Flexible bank design

Multiple kVAR steps support automatic power-factor correction panels, fixed compensation and custom capacitor-bank combinations.

Industrial durability

Rated for indoor operation from −25°C to +50°C and installation altitudes up to 2000m.

Model Selection

Rated voltage Available capacity Model format
525V 10, 15, 20, 25, 30, 40, 50 kVAR SET-CAPD-525-[kVAR]-3-B

Technical Specifications

Application Indoor AC systems below 1000V
Rated voltage 230–1000 VAC, 50Hz
Capacity range 5–50 kVAR across the SET-CAPD family
Capacity tolerance −5% to +5%
Dielectric loss tan δ ≤ 0.0015
Terminal-to-terminal withstand 2.15 × Un AC for 2 seconds
Terminal-to-case withstand 3000 VAC for 10 seconds
Maximum permissible voltage 110% of rated voltage
Maximum permissible current 130% of rated current
Discharge performance Residual voltage below 75V within 3 minutes
Ambient temperature −25°C to +50°C
Installation altitude ≤ 2000m
Standards GB/T 12747.1-2017 / IEC 60831-1:2014

Typical Applications

  • Automatic power-factor correction (APFC) panels
  • Centralized and local compensation in factories and commercial buildings
  • Motor, transformer and distribution-system reactive-power compensation
  • Detuned capacitor banks used with series reactors
  • Power-quality upgrades that reduce current and release transformer capacity

Installation & Operation Notes

  • Install upright in a dry, ventilated indoor enclosure with more than 30mm clearance between units.
  • Select a capacitor rated voltage at least 5% above the system nominal voltage.
  • For series-reactor systems, calculate the actual capacitor terminal voltage using the reactor ratio.
  • Where harmonics are present, use a correctly designed detuned reactor or harmonic-mitigation solution.
  • Keep the switching interval at 60 seconds or longer. After disconnection, wait at least 5 minutes and short the terminals before maintenance.

Need help selecting the correct capacitor?

Send us your system voltage, target kVAR, harmonic conditions and reactor ratio. SET engineers will recommend a safe configuration.

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Selection and Installation Notes

Choose the 525V power capacitor rating from measured reactive load and target power factor. Provide ventilation, upstream protection and discharge time before maintenance. SET support can assist with wiring and protection coordination for retrofit installations.