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Insulating Oil for Power and Telecom Capacitor Systems
Electrical Insulating Oil · B2B Supply

Capacitor insulating oil

Manufacturer and supplier for use in power and telecommunications capacitors

No. 1 No. 2 GB4624-88 High Specific Resistance Low Dielectric Loss

Ningbo MOS Chemical Co., Ltd. produces and supplies capacitor insulating oil to international B2B customers. We support wholesale purchases, bulk orders, cooperation with importers and distributors, as well as OEM or private label packaging for capacitors in the power and telecommunications sectors.

High specific volume resistivity Ensures reliable electrical insulation
Low Dielectric Loss Helps reduce dielectric energy losses
Stable electrical characteristics Designed for reliable capacitor operation
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Overview of capacitor insulating oil

Capacitor insulating oil is an electrical insulating and dielectric fluid designed for capacitor systems used in power transmission and transformation equipment, as well as telecommunications equipment. Its high volume resistivity and low dielectric loss help maintain stable insulating performance under demanding electrical operating conditions.

Ningbo MOS Chemical Co., Ltd. manages international production, supply, and export services for capacitor insulating oil. MOSINTER GROUP operates as an investment group with stakes in multiple production facilities, ensuring stable production coordination, bulk supply B2B, large-volume procurement, cooperation with importers and distributors, and OEM or private label packaging.

Capacitor Oil No. 1

Capacitor Oil No. 1 is used in high- and low-voltage phase-shifting capacitors that improve the power factor in power transmission and transformation systems. It can also be used in medium-frequency electric heaters, DC pulse capacitors, and other power capacitor installations.

Capacitor Oil No. 2

Capacitor oil No. 2 is primarily intended for paper capacitors used in the cable industry.

Important: Capacitor insulating oils No. 1 and No. 2 are not interchangeable and must not be mixed.

  • High specific volume resistivity for reliable electrical insulation
  • Low dielectric losses for capacitor applications
  • Stable insulation and electrical performance
  • Product Grades No. 1 and No. 2 Available
  • Suitable for power and telecommunications capacitor systems
  • Support for wholesale, bulk supply, and OEM packaging
Production and filling of insulating oil for industrial capacitors

Product Parameters

GB4624-88
PositionGradeNo.1No.2Test Method
Density at 20°C, kg/m³, max.900900GB/T 1884
Kinematic viscosity at 20°C, mm²/s, max.4037~45GB/T 265
Kinematic viscosity at 40°C, mm²/s, max.15.212.4~17.0
Pour point, °C, max.-40-40GB/T 3535
Flash point (closed cup), °C, min.135135GB/T 267
Total Acid Number, mg KOH/g, max.0.020.02GB/T 264
Water-Soluble Acids or AlkalisNoNoGB/T 259
Dielectric Strength (20°C, 50 Hz), kV/cm, min.200
Dielectric Permittivity (20°C)
100 Hz
50 Hz		2.1~2.3GB/T 5654
2.1~2.3

Frequently Asked Questions About Capacitor Insulating Oil

What is capacitor insulation oil used for?

Capacitor insulating oil is used as an electrical insulating and dielectric fluid in power and telecommunications capacitor systems, including phase-shifting capacitors, DC pulse capacitors, power capacitors, and paper capacitors.

What is the difference between capacitor oil No. 1 and No. 2?

Capacitor oil No. 1 is intended for high- and low-voltage phase-shifting capacitors, medium-frequency electric heaters, DC pulse capacitors, and other power capacitors. Capacitor oil No. 2 is primarily intended for paper capacitors used in the cable industry.

Can capacitor insulating oils No. 1 and No. 2 be mixed?

Capacitor insulating oils No. 1 and No. 2 are not interchangeable and must not be mixed.

Do you supply capacitor insulating oil in bulk and for large orders?

Yes. Ningbo MOS Chemical Co., Ltd. supplies capacitor insulating oil for international B2B wholesale, bulk procurement, importer and distributor partnerships.

Do you support OEM and private label packaging for capacitor oil?

Yes. OEM and private label packaging are available depending on order volume, target market, packaging requirements, and customer specifications. The standard packaging shown on this page is a 170 kg steel drum.