For a Yueqing power capacitor manufacturer shortlist, compare CHINT, Zhiyue, Geyue, Weidekang, Hangrong, Lugang, Yadulan, Yinyue, CNBYG and Youlang. Each company publishes a power-capacitor, intelligent-capacitor or compensation-related product range and a Yueqing connection on an official website. The useful comparison is not the largest kvar label: it is the voltage class, harmonic duty, reactor selection, switching method, protection, thermal design and document scope attached to the exact model.
“Power capacitor” covers several different products. A low-voltage self-healing shunt capacitor improves power factor at the distribution level. A high-voltage shunt capacitor is a different insulation and installation problem. An intelligent capacitor module integrates a capacitor with switching, sensing, protection and sometimes communication. A capacitor bank is an assembly containing capacitors, reactors, switching devices, protection, controllers and busbars. APF and SVG equipment are active power-electronics devices and should not be described as capacitors. Decide which scope you are buying before comparing suppliers. If the capacitor will sit beside switchgear or motor-control equipment, our switchgear guide, contactor guide and distribution box guide can help define the surrounding assembly.
How this list was selected: Official product, catalogue and contact pages were reviewed on 23 October 2026. This is a research shortlist, not a quality, price, certification, export or “best” ranking. It does not imply that BottomRace has audited every factory or verified every published rating. Confirm the legal entity, production site, exact model and current supporting documents before ordering. Some groups manufacture at more than one site, and a company address does not by itself prove where a particular capacitor or bank is made.
Ten Yueqing power capacitor manufacturers to compare
Use the published focus to decide which suppliers deserve a technical enquiry. The order is a research sequence, not a performance ranking.
| Manufacturer | Published location | Published capacitor focus | Useful first question |
|---|---|---|---|
| CHINT | Founded in Yueqing; low-voltage manufacturing base in Wenzhou | BZMJ self-healing low-voltage shunt capacitors | Which BZMJ voltage, kvar rating and harmonic conditions apply? |
| Zhiyue Group | No. 41 Liule Road, Shangfeng Industrial Zone, Liushi, Yueqing | Low- and high-voltage shunt capacitors, capacitor banks and PFC components | Is the requirement a capacitor, a bank or a complete compensation package? |
| Zhejiang Geyue Electric Technology Co., Ltd. | Zhangwan Industrial Zone, Beibaixiang, Yueqing | Self-healing shunt capacitors, intelligent capacitors and PFC components | Which BSMJ capacitor and PFC accessory set are required? |
| Zhejiang Weidekang Electric Co., Ltd. | No. 61 Aomen Middle Road, Jiangjiaqiao Industrial Zone, Beibaixiang, Yueqing | Self-healing LV capacitors, intelligent compensation and HV shunt capacitors | Which BSMJ/BKMJ family or BAM/BFM high-voltage class? |
| Hangrong Electric (Zhejiang) Co., Ltd. | No. 88 Zhandong Road, Dianhou Industrial Zone, Liushi, Yueqing | LV and HV shunt capacitors, intelligent capacitors and compensation systems | Do you need a plain capacitor or an intelligent integrated unit? |
| Zhejiang Lugang Capacitor Co., Ltd. | No. 555 Liule Road, Building 6, Liushi, Yueqing | HV/LV power capacitors, TBB banks, filtering and reactive-compensation systems | Is this a capacitor component or an engineered TBB compensation bank? |
| Yadulan Electric (Zhejiang) Co., Ltd. | No. 83–87 Zhongshan Avenue, Madao Village, Liushi, Yueqing | BSMJ capacitors, intelligent compensation units and reactive-power components | Which BSMJ voltage family matches the reactor and phase arrangement? |
| Zhejiang Yinyue Optoelectronics Technology Co., Ltd. | No. 177 Wei 5th Road, Yueqing Economic Development Zone | Intelligent power capacitors, BSMJ/BKMJ shunt capacitors and PFC boards | Is the requirement a smart capacitor module, a plain capacitor or a PCB assembly? |
| Baoyu Co., Ltd. (CNBYG) | Shuanghuanglou Industrial Park, Beibaixiang, Yueqing | BSMJ shunt capacitors, intelligent capacitor modules and power-quality systems | Which BSMJ model or BY82J intelligent module is required? |
| Zhejiang Youlang Electric Co., Ltd. | No. 32 Shanggong Road, Shangwu Industrial Zone, Liushi, Yueqing | BSMJ capacitors, intelligent compensation modules and reactive-power components | Which BSMJ or YLZN intelligent capacitor and switching scheme? |
Manufacturer profiles and sourcing questions
1. CHINT
Short name: CHINT
Published location: Founded in Yueqing; low-voltage manufacturing base in Wenzhou
CHINT publishes the BZMJ self-healing shunt capacitor for low-voltage AC systems up to 1000 V. The official product page lists AC 0.23–1.0 kV, 1–60 kvar, 50 Hz or 60 Hz, a −5% to +10% capacitance tolerance and IEC/EN 60831-1:2014 and IEC/EN 60831-2:2014. It also publishes a network condition of THDU no more than 5% and THDI no more than 20%, with detuned reactors or harmonic filters recommended above that level. CHINT's official history starts with the Yueqing Qiujing Switch Factory in 1984 and its current manufacturing map includes a Wenzhou low-voltage intelligent factory. Confirm the exact legal entity, plant and capacitor series in the quotation rather than assuming that every BZMJ variant comes from one site.
Before requesting a quote: Provide the system voltage, frequency, required kvar, measured or calculated harmonic distortion, capacitor duty, ambient temperature, altitude and intended switching method. Ask for the exact BZMJ catalogue number, capacitance, rated current, losses, terminal and mounting dimensions, discharge resistors, overvoltage protection, expected life conditions, routine-test record and current model-level declaration. Confirm the legal manufacturer and production site.
Official sources: BZMJ self-healing shunt capacitor · About CHINT and its Yueqing origin · company contact details.
2. Zhiyue Group
Short name: ZHIYUE
Published location: No. 41 Liule Road, Shangfeng Industrial Zone, Liushi, Yueqing
Zhiyue states that it was established in 1991 and operates a 6,800 m² factory at No. 41 Liule Road in Liushi. Its official product range separates low-voltage power capacitors, high-voltage power capacitors and capacitor banks, then presents BSMJ square-type capacitors, single-phase and three-phase cylindrical types and high-voltage BAM products. The three-phase square capacitor page lists 230, 400, 450, 480, 525, 690, 750 and 1200 V options, 1–60 kvar for 0.4–0.69 kV, 50/60 Hz and IEC 60831. The high-voltage BAM page covers 6.3–11 kV classes and references IEC 60871. Those are different product scopes, so begin with the circuit voltage and compensation topology.
Before requesting a quote: State whether the purchase is for individual capacitors, a capacitor bank, a pole-mounted bank or another complete assembly. Provide the nominal and maximum system voltage, frequency, required kvar, phase arrangement, harmonic study, reactor rate if any and switching device. Ask for the exact BSMJ, BAM or bank model, capacitance and current, dimensions, terminal arrangement, discharge behaviour, protection, applicable standard, drawings and factory test record.
Official sources: Low-voltage three-phase square capacitors · BAM high-voltage power capacitor · Company profile · company contact details.
3. Zhejiang Geyue Electric Technology Co., Ltd.
Short name: GEYUE
Published location: Zhangwan Industrial Zone, Beibaixiang, Yueqing
Geyue states that it was established in 2011, occupies a standardized workshop of more than 10,000 m² and is located in Zhangwan Industrial Zone, Beibaixiang. Its official range covers self-healing shunt capacitors, intelligent capacitors, APFC controllers, capacitor-switching contactors, compound switches, series reactors and related meters. The self-healing capacitor page presents a BSMJ series using metallized polypropylene film and cites GB/T 12747.1-2004 and IEC 60831-1:2014. The breadth is useful for a coordinated PFC bill of materials, but a capacitor must still be selected against the harmonic level, reactor rate and switching arrangement rather than by kvar alone.
Before requesting a quote: Send the system voltage, frequency, target power factor, required kvar, phase balance, harmonic measurements, reactor percentage and switching method. Ask for the exact BSMJ model, capacitance tolerance, current, losses, discharge time, terminal type, dimensions, protection features and model-level standard evidence. If a controller, contactor, compound switch or reactor is included, request its model and the coordination assumptions for the complete capacitor bank.
Official sources: BSMJ self-healing shunt capacitor · Company and factory information · company contact details.
4. Zhejiang Weidekang Electric Co., Ltd.
Short name: WEIDEKANG
Published location: No. 61 Aomen Middle Road, Jiangjiaqiao Industrial Zone, Beibaixiang, Yueqing
Weidekang presents itself as a power-capacitor manufacturer and publishes separate pages for BSMJ, BLMJ, BCMJ and BKMJ self-healing low-voltage capacitors, intelligent capacitor compensation assemblies, low-voltage parallel power capacitors and BAM/BFM/BFF/BWF all-film high-voltage shunt capacitors. Its site also covers capacitor-switching contactors, controllers, reactors and APF/SVG equipment. The official contact page gives No. 61 Aomen Middle Road in the Jiangjiaqiao Industrial Zone, Beibaixiang. Because the site groups capacitors, modules and complete compensation products together, the enquiry should name the exact product boundary and the production entity.
Before requesting a quote: Specify the voltage class, AC system frequency, required kvar, single or three-phase connection, harmonic conditions, reactor rate, switching method and installation environment. Ask for the exact BSMJ, BKMJ, BAM or BFM model, capacitance, rated current, dimensions, terminal layout, discharge resistor, protection arrangement and applicable standard. For a complete compensation assembly, request the single-line diagram, component schedule, thermal design, controller logic and factory test record separately from the capacitor datasheet.
Official sources: BSMJ, BLMJ, BCMJ and BKMJ self-healing capacitors · BAM, BFM, BFF and BWF high-voltage capacitors · company contact details.
5. Hangrong Electric (Zhejiang) Co., Ltd.
Short name: HANGRONG
Published location: No. 88 Zhandong Road, Dianhou Industrial Zone, Liushi, Yueqing
Hangrong publishes BSMJ self-healing low-voltage shunt capacitors, split-phase models, cylindrical types, BAM/BFM high-voltage shunt capacitors and HRK anti-harmonic low-voltage capacitors, alongside intelligent integrated compensation units, controllers, reactors, contactors, APF and SVG equipment. The product page separates these families clearly enough to begin a technical discussion. The company states that it began in 1966 and operates a standardized workshop of more than 5,000 m²; those are company-published claims and should be verified for the specific legal entity and plant. The contact page gives No. 88 Zhandong Road in the Dianhou Industrial Zone, Liushi.
Before requesting a quote: Provide the system voltage, frequency, kvar, phase arrangement, harmonic spectrum, reactor percentage, desired switching technology and whether the scope is a capacitor or an integrated compensation unit. Ask for the exact BSMJ, HRK, BAM/BFM or HR-Z series, capacitance and current, dimensions, terminals, discharge behaviour, protection and standard reference. For an intelligent unit, request the controller, switching device, metering, communication and environmental ratings as separate specification lines.
Official sources: BSMJ low-voltage shunt capacitor · BAM/BFM high-voltage shunt capacitor · All capacitor and compensation products · company contact details.
6. Zhejiang Lugang Capacitor Co., Ltd.
Short name: LUGANG
Published location: No. 555 Liule Road, Building 6, Liushi, Yueqing
Lugang identifies itself as a manufacturer and seller of high- and low-voltage power capacitors, reactive-power compensation equipment, capacitor filtering systems and TBB capacitor banks. Its product centre publishes outdoor collective and frame-type high-voltage capacitor banks, 6 kV and 10 kV automatic compensation systems, 35 kV banks, low-voltage modular compensation and dynamic compensation equipment. The site states that its capacitor products have been tested by a national power-capacitor quality supervision and inspection centre, but the buyer should request the report that names the exact model, rating and production site. The contact page gives No. 555 Liule Road, Building 6, Liushi.
Before requesting a quote: Separate the purchase into capacitor units, reactors, switching devices, controllers, protection and the enclosure or outdoor bank. Provide the system voltage, frequency, required kvar, single- or three-phase load, harmonic study, altitude, ambient conditions and installation location. Ask for the exact capacitor and bank model, voltage and current ratings, reactor rate, switching duty, discharge time, protection settings, single-line diagram, bill of materials, routine-test record and the scope of the assembly-level declaration.
Official sources: High-voltage reactive-power compensation · Low-voltage reactive-power compensation · company contact details.
7. Yadulan Electric (Zhejiang) Co., Ltd.
Short name: ADULLAN
Published location: No. 83–87 Zhongshan Avenue, Madao Village, Liushi, Yueqing
Yadulan publishes BSMJ low-voltage self-healing power capacitors, ASMJ self-healing AC filter capacitors, ADDMD self-healing parallel capacitors, intelligent integrated compensation units, reactors, controllers, capacitor-switching devices and APF/SVG equipment. Its BSMJ page describes use in AC power systems up to 1000 V for power-factor correction and voltage-quality improvement and lists BSMJ0.25 single-phase, BSMJ0.4, 0.45, 0.48, 0.525 and 0.69 three-phase families plus split-phase and phase-to-phase options. The page also explains that a 7% reactor typically calls for 0.48 kV common compensation or 0.28 kV split-phase selection, while a 14% reactor calls for 0.525 kV or 0.3 kV respectively. Treat that as a selection example, not a substitute for the supplier's written calculation for the actual system. The contact page gives No. 83–87 Zhongshan Avenue in Madao Village, Liushi.
Before requesting a quote: Provide the system voltage, phase arrangement, required kvar, harmonic measurement, intended reactor percentage, switching method and ambient temperature. Ask for the exact BSMJ or ASMJ model, capacitance, rated current, losses, dimensions, terminal and mounting details, discharge resistance, protection features, applicable standard and routine-test record. Request the capacitor and reactor selection calculation together when both are part of the same compensation branch.
Official sources: BSMJ low-voltage self-healing capacitor · Low-voltage capacitor category · company contact details.
8. Zhejiang Yinyue Optoelectronics Technology Co., Ltd.
Short name: YINYUE
Published location: No. 177 Wei 5th Road, Yueqing Economic Development Zone
Yinyue states that it was founded in 2015, has a 10,000 m² factory and focuses on the production and sale of capacitors. Its published product family includes YY-8 intelligent integrated power capacitors, single-reactor intelligent capacitors, intelligent reactive-power controllers, self-healing shunt capacitors, split-phase shunt capacitors, compound switches, capacitor-switching contactors, reactors and capacitor PCBA boards. The company's own description lists BSMJ, BCMJ, BKMJ, BGMJ and BZMJ self-healing low-voltage parallel capacitor series. That combination of capacitor manufacturing and electronics assembly can be useful for an integrated module, but a smart capacitor quotation should separate the capacitor element, controller, switching device, sensing, protection and communications functions. The contact page gives No. 177 Wei 5th Road in the Yueqing Economic Development Zone.
Before requesting a quote: Define whether you are buying a capacitor element, a smart capacitor module or a populated control board. Provide the system voltage, kvar, phase arrangement, harmonic conditions, reactor rate, control voltage, communication protocol and enclosure requirement. Ask for the exact YY-8 or BSMJ model, capacitance and tolerance, internal switching and protection scheme, dimensions, wiring diagram, firmware and communication details where applicable, model-level test record and production site.
Official sources: YY-8 intelligent integrated power capacitor · Self-healing shunt capacitor · Product centre · company contact details.
9. Baoyu Co., Ltd. (CNBYG)
Short name: CNBYG
Published location: Shuanghuanglou Industrial Park, Beibaixiang, Yueqing
CNBYG states that it was established in 2015 and manufactures power-quality products including active harmonic filters, static var generators, capacitor banks and intelligent capacitor modules. Its official product catalogue contains a BSMJ self-healing low-voltage shunt capacitor family and BY82J anti-harmonic intelligent capacitors, including models with different voltage, kvar and reactor configurations. The published BSMJ examples cite IEC 60831-1 and GB/T 12747. The contact page identifies Baoyu Co., Ltd. at Shuanghuanglou Industrial Park, Beibaixiang. APF and SVG products are power-electronics equipment, not capacitors; keep them in a separate scope even when they come from the same supplier.
Before requesting a quote: State whether the requirement is a plain BSMJ capacitor, a BY82J anti-harmonic module or a complete capacitor bank. Provide the voltage, kvar, phase arrangement, harmonic data, reactor rate, switching method, control and communication requirements and enclosure details. Ask for the exact model, capacitance, rated current, dimensions, terminal layout, protection features, applicable standard, factory test record and the legal manufacturer and production site.
Official sources: BSMJ self-healing low-voltage shunt capacitors · BY82J anti-harmonic intelligent capacitors · Power-capacitor product index · company contact details.
10. Zhejiang Youlang Electric Co., Ltd.
Short name: YOULANG
Published location: No. 32 Shanggong Road, Shangwu Industrial Zone, Liushi, Yueqing
Youlang states that it was established in 2017 in the Shangwu Industrial Zone of Liushi and operates more than 6,000 m² of production space. Its published range includes YLZN intelligent integrated power capacitors, YLZK anti-harmonic intelligent capacitors, BSMJ low-voltage shunt capacitors, cylindrical low-voltage power capacitors, intelligent controllers, compound switches, capacitor-switching contactors, series reactors and APF/SVG equipment. The BSMJ product description covers power-factor correction and voltage-quality improvement in AC systems up to 1000 V. Its cylindrical BSMJ page cites IEC 60831-1 for the self-healing low-voltage capacitor scope. The contact page gives No. 32 Shanggong Road in the Shangwu Industrial Zone, Liushi.
Before requesting a quote: Provide the voltage, frequency, phase arrangement, required kvar, harmonic conditions, reactor rate, switching method and whether a standalone capacitor or integrated smart unit is required. Ask for the exact BSMJ or YLZN model, capacitance, rated current, dimensions, terminal details, discharge and protection arrangements, applicable standard and factory test record. For an intelligent module, also request the controller logic, measurement points, communication protocol, firmware version and replacement-part route.
Official sources: BSMJ low-voltage parallel capacitor category · Company profile · company contact details.
Power-capacitor quotation and design checklist
A capacitor quotation can look complete while leaving out the conditions that determine its life and safety. Give every supplier the same electrical schedule, harmonic data and installation information, then ask for a model-specific selection rather than a price for a generic “400 V capacitor”.
| Include in your enquiry | Ask each supplier to confirm |
|---|---|
| System data | Nominal and maximum voltage, frequency, phase arrangement, neutral arrangement and the actual voltage at the capacitor terminals after reactor and cable drops. |
| Required output | Target power factor, existing and required reactive power, required kvar at the defined voltage, load profile and whether the bank needs fixed, stepped or dynamic compensation. |
| Harmonics | Measured or calculated voltage and current distortion, harmonic spectrum, resonance risk and the required reactor percentage. Do not select a plain capacitor for a harmonic-rich system without a written study. |
| Capacitor type | Low-voltage self-healing shunt, high-voltage shunt, filter capacitor, split-phase capacitor or intelligent module; explain why that family fits the duty. |
| Ratings and tolerance | Rated voltage, kvar, capacitance, capacitance tolerance, rated current, losses, maximum overvoltage and overcurrent, discharge behaviour and expected life conditions. |
| Switching | Contactor, compound switch, thyristor switch or breaker; inrush current, switching frequency, control voltage, zero-cross behaviour and coordination with the capacitor and reactor. |
| Protection | Fuse or breaker, overcurrent, overvoltage, undervoltage, unbalanced current or voltage, temperature, pressure or self-protection features and the trip or alarm logic. |
| Thermal and environment | Ambient temperature, enclosure ventilation, altitude, humidity, pollution, expected harmonic heating and the derating or cooling assumptions used for the quotation. |
| Mechanical construction | Case material, terminal type, mounting orientation, dimensions, clearance, creepage, earthing, cable entry, corrosion protection and service access. |
| Bank design | Single-line diagram, step sizes, busbar rating, reactor and capacitor matching, switching sequence, controller settings, discharge time and protection coordination. |
| Standards and records | IEC 60831-1/-2 for low-voltage self-healing shunt capacitors or IEC 60871 for high-voltage shunt capacitors only where the scope is applicable; routine test, capacitance check, withstand test, discharge check, serial-number-linked record and model-level declaration. |
| Commercial identity | Legal manufacturer, legal seller, production site, country of origin, warranty, spare-parts route and the technical person who will approve the final selection. |
Do not size a capacitor from the motor or transformer nameplate alone. The required kvar depends on the existing power factor, the target power factor, the load profile and the voltage at which the capacitor is rated. A 30 kvar capacitor at one voltage does not deliver the same reactive power at another voltage, and a reactor changes the voltage seen by the capacitor. Ask the supplier to show the calculation with the actual system voltage, reactor rate and required output.
Treat harmonics as a design input, not a sales question. Capacitors and the supply inductance form a resonant circuit. In a harmonic-rich installation, a detuned reactor changes the resonance point and reduces the risk of overload, but the correct percentage depends on the measured spectrum and the bank design. CHINT’s BZMJ page, for example, publishes a THDU limit of 5% and a THDI limit of 20% for its stated application and directs buyers to detuned reactors or filters above those levels. That statement belongs to that product page; do not apply it to every capacitor in the list.
Separate a capacitor from a bank. A capacitor model number, a reactor model number and a complete TBB or modular bank are different purchase scopes. The bank needs a single-line diagram, step schedule, switching logic, protection settings, internal separation, thermal calculation and routine test. A capacitor certificate does not automatically certify the complete assembly, and an assembly certificate does not prove that the capacitor inside it has the required model-level rating.
Plan the discharge and service condition. Capacitors store energy after isolation. Confirm the internal or external discharge path, the time to a safe voltage, the indicator or control logic and the lockout procedure. The person who services the bank must be able to isolate it, verify the discharge and earth it according to the site procedure. Do not rely on a controller display as the only proof that the capacitor is discharged.
If the capacitor bank will be installed with switchgear, a distribution board or motor-control equipment, keep the interfaces visible in the same drawing set. The switchgear guide and distribution box guide are useful starting points for the surrounding enclosure and protection scope.
What to check during a power-capacitor factory visit
Arrange the visit after the supplier has identified the exact model and production site. Ask which operations are in-house: metallized-film processing, element winding, flattening, impregnation or filling, case assembly, terminal welding, discharge-resistor assembly, sealing, electrical test, controller assembly, bank wiring and packing.
- Trace the film and element: ask for the film specification, metallization type, element winding, margin and self-healing design relevant to the quoted family. Compare the production route with the model being offered.
- Review the capacitor build: check element protection, internal connections, terminal welding, case material, sealing, filling or impregnation, discharge resistor and marking. Ask how the factory prevents mixed ratings on the same line.
- Watch the electrical tests: request capacitance, loss, insulation resistance, voltage withstand, discharge and functional checks as applicable. Record the instrument calibration status and the serial-number link.
- Verify the protection and thermal assumptions: ask how overvoltage, overcurrent, harmonics, internal pressure or temperature protection are handled for the exact model and how the enclosure or bank is ventilated.
- Inspect the bank build: for a bank or intelligent module, trace the capacitor, reactor, switching device, controller, fuses, terminals, busbars and earth connection against the approved bill of materials.
- Check the records: ask for the approved drawing, component list, routine-test record, nameplate data, packing list and warranty route. Link the records to the serial number or batch.
- Confirm the entity and site: verify the legal manufacturer and the production address for the capacitor, reactor, controller and complete bank. If a group has several plants, ask which one will build and test each scope.
- Keep the limits of a visit clear: a factory visit provides observations and a document trail; it does not replace a design study, type test, certification review or independent product testing.
BottomRace coordinates electrical sourcing and purchasing in Yueqing. Pro: $0 separate service fee; procurement service costs are included in the product quotation. Basic: 5% of product value, with a minimum service fee of $100, for your existing Yueqing suppliers. Compare our Pro and Basic services. For on-site meetings, see our factory visit services. The quotation confirms the scope, inspections, payment terms and any additional costs.
Questions power-capacitor buyers ask
Is a power capacitor the same as an intelligent capacitor?
No. A power capacitor is the capacitive element that provides reactive power. An intelligent capacitor module combines a capacitor with switching, sensing, protection, control and sometimes communication in one package. The module can simplify installation, but it adds electronics, firmware and replacement-part considerations. Ask for the capacitor rating and the module rating separately.
Can I use a standard capacitor in a harmonic-rich system?
Not without a harmonic study and a suitable capacitor and reactor selection. Harmonics increase dielectric and current stress, and the capacitor can interact with the supply inductance to create resonance. A detuned reactor changes the resonance point but must be selected with the measured spectrum, capacitor voltage rating and required kvar. Do not copy a reactor percentage from another site without checking the actual system.
Why does the capacitor voltage rating differ from the system voltage?
A reactor in series with the capacitor raises the voltage at the capacitor terminals above the bus voltage. The capacitor must therefore be rated for the voltage it actually sees, not only the nominal bus voltage. The supplier should show the calculation for the selected reactor rate and confirm the capacitor voltage class in the quotation.
What is the difference between a capacitor and a capacitor bank?
A capacitor is a component. A capacitor bank is an assembly that may contain multiple capacitor steps, reactors, switching devices, fuses or breakers, a controller, busbars and an enclosure. The bank requires a single-line diagram, step schedule, protection coordination, thermal design and routine test. A capacitor datasheet does not replace the bank documentation.
Does a higher kvar rating always improve the power factor more?
Not necessarily. The required kvar depends on the existing and target power factor, the load profile and the voltage at which the capacitor is rated. Oversizing can cause leading power factor, overvoltage, switching problems and unnecessary losses. Select the bank in steps and verify the controller strategy against the actual load variation.
How should I compare the listed companies?
Use the same system schedule, harmonic data, reactor assumption, switching method, protection scope and document requirements for every supplier. Compare the exact model and production site, not only the company name or headline kvar. Request a written selection calculation, drawing and test record, then verify the sample and the factory.
Are these companies ranked by quality, price or export volume?
No. This is a research shortlist based on published product and location information. It is not a quality, price, certification, export or “best” ranking. The article does not establish that every company manufactures every product family at the stated address, and BottomRace has not audited every factory for this list.
Planning a Yueqing power-capacitor sourcing trip?
Email the system voltage, required kvar, harmonic data, reactor assumption, switching method and visit dates. We can discuss supplier screening and agreed local support in Yueqing.