# China Transformer Manufacturers, Bus Duct Suppliers, Switchgear Factory | Perfect(Jiangsu) Electrical Group Co., Ltd. > Jiangsu Perfect Electric Technology Co., Ltd.: We're known as one of the leading manufacturers and suppliers of transformer, bus duct, switchgear, compact substation, dry type transformer in China. Welcome to buy bulk high quality products for sale here from our factory. Customized orders are welcome. ## Home - [Home](https://www.perfect-transformer.com/) ## About Us - [About Us](https://www.perfect-transformer.com/about-us) - [Contact Us](https://www.perfect-transformer.com/contact-us) - [Request a Quote](https://www.perfect-transformer.com/inquiry) ## Products - [Products](https://www.perfect-transformer.com/products) - [Transformer](https://www.perfect-transformer.com/transformer/) - [Dry Type Transformer](https://www.perfect-transformer.com/transformer/dry-type-transformer/) - [Oil Immersed Transformer](https://www.perfect-transformer.com/transformer/oil-immersed-transformer/) - [Bus Duct](https://www.perfect-transformer.com/bus-duct/) - [Switchgear](https://www.perfect-transformer.com/switchgear/) - [Compact Substation](https://www.perfect-transformer.com/compact-substation/) - [Low Voltage Switchgear](https://www.perfect-transformer.com/switchgear/low-voltage-switchgear/) - [Medium Voltage Switchgear](https://www.perfect-transformer.com/switchgear/medium-voltage-switchgear/) - [Low Voltage Sandwich Bus Duct](https://www.perfect-transformer.com/bus-duct/low-voltage-sandwich-bus-duct.html) - [IP68 Outdoor Cast Resin Bus Duct](https://www.perfect-transformer.com/bus-duct/ip68-outdoor-cast-resin-bus-duct.html) - [Solar Power Compact Substation](https://www.perfect-transformer.com/compact-substation/solar-power-compact-substation.html) - [Containerized Prefabricated Substation](https://www.perfect-transformer.com/compact-substation/containerized-prefabricated-substation.html) - [10-35KV Dry Type Distribution Transformer](https://www.perfect-transformer.com/transformer/dry-type-transformer/10-35kv-dry-type-distribution-transformer.html) - [35KV Dry Type Power Transformer](https://www.perfect-transformer.com/transformer/dry-type-transformer/35kv-dry-type-power-transformer.html) - [10-35KV Oil Immersed Distribution Transformer](https://www.perfect-transformer.com/transformer/oil-immersed-transformer/10-35kv-oil-immersed-distribution-transformer.html) - [35KV-110KV Oil Immersed Power Transformer](https://www.perfect-transformer.com/transformer/oil-immersed-transformer/35kv-110kv-oil-immersed-power-transformer.html) - [MNS Low Voltage Switchgear](https://www.perfect-transformer.com/switchgear/low-voltage-switchgear/mns-low-voltage-switchgear.html) - [KYN28A-12 Medium Voltage Switchgear](https://www.perfect-transformer.com/switchgear/medium-voltage-switchgear/kyn28a-12-medium-voltage-switchgear.html) - [Single Phase Pole Mounted Transformer](https://www.perfect-transformer.com/transformer/oil-immersed-transformer/single-phase-pole-mounted-transformer.html) ## Showroom - [Showroom](https://www.perfect-transformer.com/showroom/) - [high voltage switchgear](https://www.perfect-transformer.com/showroom/high-voltage-switchgear/) - [outdoor bus duct](https://www.perfect-transformer.com/showroom/outdoor-bus-duct/) - [20KV transformer](https://www.perfect-transformer.com/showroom/20kv-transformer/) - [11kv compact substation](https://www.perfect-transformer.com/showroom/11kv-compact-substation/) - [110KV transformer](https://www.perfect-transformer.com/showroom/110kv-transformer/) - [2000a bus duct](https://www.perfect-transformer.com/showroom/2000a-bus-duct/) - [cast resin bus duct](https://www.perfect-transformer.com/showroom/cast-resin-bus-duct/) - [sandwich bus duct](https://www.perfect-transformer.com/showroom/sandwich-bus-duct/) - [compact substation](https://www.perfect-transformer.com/showroom/compact-substation/) - [power transformer](https://www.perfect-transformer.com/showroom/power-transformer/) - [mv switchgear](https://www.perfect-transformer.com/showroom/mv-switchgear/) - [1000 kva compact substation](https://www.perfect-transformer.com/showroom/1000-kva-compact-substation/) - [oil immersed transformer](https://www.perfect-transformer.com/showroom/oil-immersed-transformer/) - [medium voltage switchgear](https://www.perfect-transformer.com/showroom/medium-voltage-switchgear/) - [prefabricated substation](https://www.perfect-transformer.com/showroom/prefabricated-substation/) - [low voltage switchboard](https://www.perfect-transformer.com/showroom/low-voltage-switchboard/) - [Wind Power Compact Substation](https://www.perfect-transformer.com/showroom/wind-power-compact-substation/) - [33kv compact substation](https://www.perfect-transformer.com/showroom/33kv-compact-substation/) - [4000a bus duct](https://www.perfect-transformer.com/showroom/4000a-bus-duct/) - [bus duct](https://www.perfect-transformer.com/showroom/bus-duct/) - [dry type transformer](https://www.perfect-transformer.com/showroom/dry-type-transformer/) - [low voltage switchgear](https://www.perfect-transformer.com/showroom/low-voltage-switchgear/) - [35KV transformer](https://www.perfect-transformer.com/showroom/35kv-transformer/) - [bus duct electrical](https://www.perfect-transformer.com/showroom/bus-duct-electrical/) - [lv switchgear](https://www.perfect-transformer.com/showroom/lv-switchgear/) - [low voltage bus duct](https://www.perfect-transformer.com/showroom/low-voltage-bus-duct/) - [IP68 bus duct](https://www.perfect-transformer.com/showroom/ip68-bus-duct/) - [switchgear](https://www.perfect-transformer.com/showroom/switchgear/) - [transformer](https://www.perfect-transformer.com/showroom/transformer/) - [35KV power transformer](https://www.perfect-transformer.com/showroom/35kv-power-transformer/) ## News - [News](https://www.perfect-transformer.com/newslist-1) - [Our 10kV Distribution Transformers Used in The South Sudan FSF Project](https://www.perfect-transformer.com/news/our-10kv-distribution-transformers-used-in-the-85322244.html) - [Our 35kV Power Transformers Successfully Applied in Kazakhstan KMK Oilfield Project](https://www.perfect-transformer.com/news/our-35kv-power-transformers-successfully-appli-85322248.html) - [Our Busway Successfully Applied in Saudi King Port Project](https://www.perfect-transformer.com/news/our-busway-successfully-applied-in-saudi-king-85322254.html) - [Pakistan Client Visits Our Factory](https://www.perfect-transformer.com/news/pakistan-client-visits-our-factory-85322263.html) - [Iraq Energy Expo & Conference (IEE)](https://www.perfect-transformer.com/news/iraq-energy-expo-conference-iee-85407118.html) - [Cooperation Relationship With Pakistan Client](https://www.perfect-transformer.com/news/cooperation-relationship-with-pakistan-client-85424463.html) - [Gather Strength, March Forward Together ---Jiangsu Perfect Electric 2026 Annual Celebration !](https://www.perfect-transformer.com/news/gather-strength-march-forward-together-jia-85441792.html) - [She Power-Women's Day Event](https://www.perfect-transformer.com/news/she-power-women-s-day-event-85457037.html) - [Deepening Mutual Trust And Jointly Seeking Development - Welcome Shanghai DIXI New Energy Co., Ltd. To Visit And Conduct Research At Perfect Electric.](https://www.perfect-transformer.com/news/deepening-mutual-trust-and-jointly-seeking-dev-85509126.html) - [Perfect (Jiangsu) Electrical Group Co., Ltd. Shines At VIETNAM ETE 2026](https://www.perfect-transformer.com/news/perfect-jiangsu-electrical-group-co-ltd-s-85587119.html) - [Perfect Electrical Shines At Vietnam Ho Chi Minh Power Exhibition, Booth 637 Wins Wide Recognition](https://www.perfect-transformer.com/news/perfect-electrical-shines-at-vietnam-ho-chi-mi-85599285.html) ## Info - [Blog](https://www.perfect-transformer.com/info/) - [What Technical Advantages Does the ''Environmentally Friendly Insulating Oil'' of Transformers Have Over Traditional Mineral Oil?](https://www.perfect-transformer.com/info/what-technical-advantages-does-the-environme-103238697.html) - [How to Match the ''IP Protection Level'' Selection of High-Low Voltage Switchgears to Different Usage Environments?](https://www.perfect-transformer.com/info/how-to-match-the-ip-protection-level-selec-103238704.html) - [How Does the ''Condition Monitoring System'' of Smart Transformers Achieve ''Predictive Maintenance''?](https://www.perfect-transformer.com/info/how-does-the-condition-monitoring-system-o-103238708.html) - [Why Is the ''Arc Protection'' Technology of High-Low Voltage Switchgears the ''Last Line of Defense'' for Power Distribution Safety?](https://www.perfect-transformer.com/info/why-is-the-arc-protection-technology-of-hi-103238721.html) - [How Does High-Efficiency Iron Core Technology of Transformers Reduce Industrial Energy Consumption?](https://www.perfect-transformer.com/info/how-does-high-efficiency-iron-core-technology-103238727.html) - [Power Transformer: What You Should Know](https://www.perfect-transformer.com/info/power-transformer-what-you-should-know-103305426.html) - [Why you need a Low-Energy Transformer?](https://www.perfect-transformer.com/info/why-you-need-a-low-energy-transformer-103311658.html) - [What is reactive compensation?](https://www.perfect-transformer.com/info/what-is-reactive-compensation-103465758.html) - [What is Power and Power Factor?](https://www.perfect-transformer.com/info/what-is-power-and-power-factor-103465956.html) - [What is a Transformer?](https://www.perfect-transformer.com/info/what-is-a-transformer-103478266.html) - [What is Iron Core of Transformers?](https://www.perfect-transformer.com/info/what-is-iron-core-of-transformers-103478355.html) ## Blog - [Article](https://www.perfect-transformer.com/blog/) - [What are the protection relays used in compact substations?](https://www.perfect-transformer.com/blog/what-are-the-protection-relays-used-in-compact-substations-2502410.html) - [How to transport a 2000A bus duct safely?](https://www.perfect-transformer.com/blog/how-to-transport-a-2000a-bus-duct-safely-2502443.html) - [What are the grounding requirements for LV switchgear?](https://www.perfect-transformer.com/blog/what-are-the-grounding-requirements-for-lv-switchgear-2502468.html) - [Can IP68 bus duct be used in amusement parks?](https://www.perfect-transformer.com/blog/can-ip68-bus-duct-be-used-in-amusement-parks-2502492.html) - [Best 10 bus duct Suppliers in China](https://www.perfect-transformer.com/blog/best-10-bus-duct-suppliers-in-china-2503949.html) - [What is the role of smart technology in medium voltage switchgear?](https://www.perfect-transformer.com/blog/what-is-the-role-of-smart-technology-in-medium-voltage-switchgear-2521154.html) - [What is the lifespan of a prefabricated substation?](https://www.perfect-transformer.com/blog/what-is-the-lifespan-of-a-prefabricated-substation-2521181.html) - [What are the specific requirements for using bus duct electrical in industrial settings?](https://www.perfect-transformer.com/blog/what-are-the-specific-requirements-for-using-bus-duct-electrical-in-industrial-s-2521199.html) - [How to optimize the electrical performance of a 4000a bus duct?](https://www.perfect-transformer.com/blog/how-to-optimize-the-electrical-performance-of-a-4000a-bus-duct-2538158.html) - [What is the design load of a low voltage bus duct?](https://www.perfect-transformer.com/blog/what-is-the-design-load-of-a-low-voltage-bus-duct-2538189.html) - [How does the load affect an oil immersed transformer?](https://www.perfect-transformer.com/blog/how-does-the-load-affect-an-oil-immersed-transformer-2538217.html) - [How does a Transformer model compare to random forests in tabular data analysis?](https://www.perfect-transformer.com/blog/how-does-a-transformer-model-compare-to-random-forests-in-tabular-data-analysis-2557588.html) - [What are the electromagnetic interference issues of a dry type transformer?](https://www.perfect-transformer.com/blog/what-are-the-electromagnetic-interference-issues-of-a-dry-type-transformer-2557608.html) - [How to deal with the waste oil from an oil immersed transformer?](https://www.perfect-transformer.com/blog/how-to-deal-with-the-waste-oil-from-an-oil-immersed-transformer-2557627.html) - [Can outdoor bus ducts be used in residential areas?](https://www.perfect-transformer.com/blog/can-outdoor-bus-ducts-be-used-in-residential-areas-2557652.html) - [Top 10 power transformer Manufacturers in China](https://www.perfect-transformer.com/blog/top-10-power-transformer-manufacturers-in-china-2559444.html) - [What is the energy efficiency of high voltage switchgear?](https://www.perfect-transformer.com/blog/what-is-the-energy-efficiency-of-high-voltage-switchgear-2578351.html) - [What is the rated current of a low voltage switchboard?](https://www.perfect-transformer.com/blog/what-is-the-rated-current-of-a-low-voltage-switchboard-2578374.html) - [How to store IP68 bus duct properly?](https://www.perfect-transformer.com/blog/how-to-store-ip68-bus-duct-properly-2578391.html) - [What is the quality control process for the switchgear I buy?](https://www.perfect-transformer.com/blog/what-is-the-quality-control-process-for-the-switchgear-i-buy-2578421.html) - [Top 10 bus duct electrical Manufacturers in China 2025](https://www.perfect-transformer.com/blog/top-10-bus-duct-electrical-manufacturers-in-china-2579528.html) - [What are the common faults in LV switchgear and how to troubleshoot them?](https://www.perfect-transformer.com/blog/what-are-the-common-faults-in-lv-switchgear-and-how-to-troubleshoot-them-2596136.html) - [How to repair a prefabricated substation?](https://www.perfect-transformer.com/blog/how-to-repair-a-prefabricated-substation-2596159.html) - [Can low voltage bus ducts be used in railway applications?](https://www.perfect-transformer.com/blog/can-low-voltage-bus-ducts-be-used-in-railway-applications-2596186.html) - [How to check the mechanical strength of a 4000a bus duct?](https://www.perfect-transformer.com/blog/how-to-check-the-mechanical-strength-of-a-4000a-bus-duct-2596213.html) - [How does LV switchgear contribute to power system reliability?](https://www.perfect-transformer.com/blog/how-does-lv-switchgear-contribute-to-power-system-reliability-2612636.html) - [How to replace the components of a dry type transformer?](https://www.perfect-transformer.com/blog/how-to-replace-the-components-of-a-dry-type-transformer-2612654.html) - [How do you test a switchgear?](https://www.perfect-transformer.com/blog/how-do-you-test-a-switchgear-2612677.html) - [How to test the performance of LV switchgear?](https://www.perfect-transformer.com/blog/how-to-test-the-performance-of-lv-switchgear-2612698.html) - [How does a compact substation handle short - circuits?](https://www.perfect-transformer.com/blog/how-does-a-compact-substation-handle-short-circuits-2629370.html) - [What are the types of relays used in high voltage switchgear?](https://www.perfect-transformer.com/blog/what-are-the-types-of-relays-used-in-high-voltage-switchgear-2629390.html) - [What are the requirements for the installation of a sandwich bus duct in a confined space?](https://www.perfect-transformer.com/blog/what-are-the-requirements-for-the-installation-of-a-sandwich-bus-duct-in-a-confi-2629420.html) - [What are the fault - recording capabilities of LV switchgear?](https://www.perfect-transformer.com/blog/what-are-the-fault-recording-capabilities-of-lv-switchgear-2629442.html) - [What is the thermal management strategy for bus duct electrical?](https://www.perfect-transformer.com/blog/what-is-the-thermal-management-strategy-for-bus-duct-electrical-2648763.html) - [What is the corrosion resistance of bus ducts to buy?](https://www.perfect-transformer.com/blog/what-is-the-corrosion-resistance-of-bus-ducts-to-buy-2648786.html) - [What is the purpose of a circuit breaker in a switchgear?](https://www.perfect-transformer.com/blog/what-is-the-purpose-of-a-circuit-breaker-in-a-switchgear-2648822.html) - [Can a compact substation be installed in a rooftop?](https://www.perfect-transformer.com/blog/can-a-compact-substation-be-installed-in-a-rooftop-2648839.html) - [Top 10 sandwich bus duct Suppliers in the world](https://www.perfect-transformer.com/blog/top-10-sandwich-bus-duct-suppliers-in-the-world-2652464.html) - [Can medium voltage switchgear be customized?](https://www.perfect-transformer.com/blog/can-medium-voltage-switchgear-be-customized-2672925.html) - [What is the noise level of a dry type transformer?](https://www.perfect-transformer.com/blog/what-is-the-noise-level-of-a-dry-type-transformer-2672977.html) - [Can IP68 bus duct be used in airports?](https://www.perfect-transformer.com/blog/can-ip68-bus-duct-be-used-in-airports-2692628.html) - [What is the temperature rise limit for bus duct electrical?](https://www.perfect-transformer.com/blog/what-is-the-temperature-rise-limit-for-bus-duct-electrical-2692647.html) - [Can IP68 bus duct be used in stadiums?](https://www.perfect-transformer.com/blog/can-ip68-bus-duct-be-used-in-stadiums-2692676.html) - [What is the rated current of cast resin bus duct?](https://www.perfect-transformer.com/blog/what-is-the-rated-current-of-cast-resin-bus-duct-2692695.html) - [10 Leading mv switchgear Factory in China](https://www.perfect-transformer.com/blog/10-leading-mv-switchgear-factory-in-china-2694054.html) - [Top 10 compact substation Manufacturers in the world 2025](https://www.perfect-transformer.com/blog/top-10-compact-substation-manufacturers-in-the-world-2748293.html) - [2025 Top 10 outdoor bus duct Factory in China](https://www.perfect-transformer.com/blog/2025-top-10-outdoor-bus-duct-factory-in-china-2770654.html) - [What type of load can a dry type transformer handle?](https://www.perfect-transformer.com/blog/what-type-of-load-can-a-dry-type-transformer-handle-2835631.html) - [What are the main components of high voltage switchgear?](https://www.perfect-transformer.com/blog/what-are-the-main-components-of-high-voltage-switchgear-2835642.html) - [What is the grounding requirement for low voltage bus ducts?](https://www.perfect-transformer.com/blog/what-is-the-grounding-requirement-for-low-voltage-bus-ducts-2835665.html) - [2026 Top 10 sandwich bus duct Factory in China](https://www.perfect-transformer.com/blog/2026-top-10-sandwich-bus-duct-factory-in-china-2836967.html) - [Can a 4000a bus duct be used in a humid environment?](https://www.perfect-transformer.com/blog/can-a-4000a-bus-duct-be-used-in-a-humid-environment-2854993.html) - [What are the spare parts required for a low voltage switchboard?](https://www.perfect-transformer.com/blog/what-are-the-spare-parts-required-for-a-low-voltage-switchboard-2855016.html) - [What are the safety features of high voltage switchgear?](https://www.perfect-transformer.com/blog/what-are-the-safety-features-of-high-voltage-switchgear-2855040.html) - [What is the grounding method of China bus duct?](https://www.perfect-transformer.com/blog/what-is-the-grounding-method-of-china-bus-duct-2855059.html) - [What are the applications of switchgear in industrial facilities?](https://www.perfect-transformer.com/blog/what-are-the-applications-of-switchgear-in-industrial-facilities-2875770.html) - [How to ensure proper ventilation in a prefabricated substation?](https://www.perfect-transformer.com/blog/how-to-ensure-proper-ventilation-in-a-prefabricated-substation-2875803.html) - [What is the rated current of IP68 bus duct?](https://www.perfect-transformer.com/blog/what-is-the-rated-current-of-ip68-bus-duct-2875823.html) - [2026 Top 10 mv switchgear Manufacturers in China](https://www.perfect-transformer.com/blog/2026-top-10-mv-switchgear-manufacturers-in-china-2877510.html) - [What are the types of tap changers in power transformers?](https://www.perfect-transformer.com/blog/what-are-the-types-of-tap-changers-in-power-transformers-2895122.html) - [What are the applications of power transformers?](https://www.perfect-transformer.com/blog/what-are-the-applications-of-power-transformers-2895144.html) - [Can a low voltage switchboard be customized?](https://www.perfect-transformer.com/blog/can-a-low-voltage-switchboard-be-customized-2895167.html) - [What is the dielectric strength of low voltage switchgear?](https://www.perfect-transformer.com/blog/what-is-the-dielectric-strength-of-low-voltage-switchgear-2913199.html) - [Can bus ducts be used in residential buildings?](https://www.perfect-transformer.com/blog/can-bus-ducts-be-used-in-residential-buildings-2913219.html) - [What are the functions of the monitoring system in a low voltage switchboard?](https://www.perfect-transformer.com/blog/what-are-the-functions-of-the-monitoring-system-in-a-low-voltage-switchboard-2913243.html) - [Can a bus duct be retrofitted in an existing power system?](https://www.perfect-transformer.com/blog/can-a-bus-duct-be-retrofitted-in-an-existing-power-system-2913272.html) - [What is the voltage level of China bus duct?](https://www.perfect-transformer.com/blog/what-is-the-voltage-level-of-china-bus-duct-2933617.html) - [What is the voltage rating of a typical bus duct?](https://www.perfect-transformer.com/blog/what-is-the-voltage-rating-of-a-typical-bus-duct-2933645.html) - [Are there any limitations to using IP68 bus duct?](https://www.perfect-transformer.com/blog/are-there-any-limitations-to-using-ip68-bus-duct-2933677.html) - [Top 10 bus duct Factory in the world 2026](https://www.perfect-transformer.com/blog/top-10-bus-duct-factory-in-the-world-2026-2935795.html) - [What are the feasibility studies for installing a compact substation?](https://www.perfect-transformer.com/blog/what-are-the-feasibility-studies-for-installing-a-compact-substation-2953787.html) - [How does the size of an oil immersed transformer affect its performance?](https://www.perfect-transformer.com/blog/how-does-the-size-of-an-oil-immersed-transformer-affect-its-performance-2953826.html) - [What is the starting current of a dry type transformer?](https://www.perfect-transformer.com/blog/what-is-the-starting-current-of-a-dry-type-transformer-2953851.html) - [What are the grounding requirements for cast resin bus duct?](https://www.perfect-transformer.com/blog/what-are-the-grounding-requirements-for-cast-resin-bus-duct-2953874.html) - [What are the requirements for bus ducts in a microgrid system?](https://www.perfect-transformer.com/blog/what-are-the-requirements-for-bus-ducts-in-a-microgrid-system-2971614.html) - [What is the purpose of the insulation resistance test for medium voltage switchgear?](https://www.perfect-transformer.com/blog/what-is-the-purpose-of-the-insulation-resistance-test-for-medium-voltage-2971631.html) - [What is the weight of China bus duct?](https://www.perfect-transformer.com/blog/what-is-the-weight-of-china-bus-duct-2971654.html) - 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