HV switchgear / GIS
110-220 kV gas-insulated switchgear or AIS bays for transmission projects. Busbar rating, breaking capacity and SF6/N2 gas management are confirmed against the type-test and FAT records.
InquireSwitchgear & Panels
The Switchgear & Panels we reverse-engineer, verify, and negotiate on your behalf. Pick a model or send us the spec.
MV switchgear
Air-insulated or SF6-insulated panels, 12-40.5 kV, fixed or withdrawable. We confirm the type-test certificate matches the exact model and voltage class you are buying.
InquireLV distribution panel
MNS/GCS-style fixed or withdrawable panels up to 4000 A. Busbar material, IP rating, and short-circuit withstand are verified against the type test.
InquireRing main unit (RMU)
Compact SF6 or solid-insulated RMUs for 12/24 kV distribution networks. Switching duty, cable entries, and gas type are confirmed against the datasheet and factory records.
InquireWhat actually screens switchgear
Substituting MV metal-enclosed switchgear turns on five fields: rated voltage and busbar current, short-time and peak withstand under IEC 62271-200, internal-arc classification (IAC — bound to the enclosure construction, not an accessory), platform commonality (the "same manufacturer" claim can sit across different breaker platforms), and the completion of interlocking duty.
The highest-yield line in verification is the **scope line** of the test report: whether the certificate names the 24 kV or the 36 kV design, whether the temperature-rise test ran at the current your order requires, and whether the internal-arc report covers your arrangement. One report covers one configuration; a hurried reviewer stops at the word "certified" and misses the entire story.
The workflow mirrors the rest of the site: a free 48-hour screen returns a go / hold / walk signal on one supplier; the Spec Match tier reverse-engineers parameters and shortlists factories whose product line covers them; the Remote Audit verifies tooling, interlocks and test records on the floor. You pay us, and no commission flows from any factory, stated in writing.
Where switchgear is built — and why it is built there
China carries the bulk of world output in MV and LV assemblies, and that output is concentrated in a handful of clusters. Finding a factory is therefore a fairly specific geographical question.
01
Clustering produces component depth
The low-voltage electrical cluster centred on Yueqing, Zhejiang, gathers more than 14,000 firms across the electrical chain, covering some 200 product series, 6,000 categories and 25,000 models, with a local supply rate around 85% and a one-hour delivery loop. Enclosures, breakers, busbars and secondary components can be assembled within a day.
02
Scale thins the unit cost
The same cluster posted around RMB 124.6 billion in above-scale industrial output in 2024, and low-voltage electrical products from it hold over 65% of the domestic Chinese market. One drawing can be quoted by several factories at once — exactly the competition a buyer wants.
03
The other side of that density
A high local supply rate also means many sub-contract steps. Internal-arc classification rests on the complete enclosure construction, so one sheet-metal operation sent out of the controlled line can invalidate the rating; and the anti-corrosion class (C4/C5) is the line quotations quietly downgrade most often.
04
What the screen actually reads
Whether the report names a 24 kV or a 36 kV design, whether the temperature-rise test ran at your ordered current, and whether the internal-arc report covers your cubicle arrangement. One report covers one configuration — a hurried reviewer stops at the word "certified".
Send us the drawing for this panel
The single-line diagram, the cubicle schedule or just the rating and IP class is enough to start. We return one verdict on the supplier and one core reason within 48 hours, then map the parameters onto a shortlist of factories whose product line genuinely covers them.
Brand equivalents in this category
Equipment sourcing FAQ
How do you tell a real factory from a trading office?
We cross-check the business-licence scope, social-insurance headcount, and customs filing. A "manufacturer" with two insured staff and no production-equipment records is almost always a trader reselling someone else's unit. We also look at whether the address is an industrial park or a serviced office.
Can you match a specific brand or model to the right manufacturer?
Yes. Send us the brand and model, or just a nameplate photo, and we reverse-engineer the key parameters: rated voltage, impedance, cooling class, protection grade. Then we shortlist Chinese manufacturers whose product line genuinely covers those parameters. This is the Spec Match tier.
Can you negotiate on my behalf?
Yes. The Procurement Execution and Remote Audit tiers include independent negotiation support, and On-Site Verification covers the physical checks; either way, we sit on your side of the table, not the factory's.
Do you take commissions from factories?
Never. We're paid only by you, on a flat fee. When we name an alternative supplier, we state in writing that we have no financial relationship with it. No referral fees, no kickbacks, no revenue share. Our only incentive is that your deal closes.