In critical plants, safety and uptime are non-negotiable. That’s why we design and manufacture certified control panels and low-voltage switchgear that pass inspection the first time—and run reliably for years.
Huier Electrical is a manufacturer of custom industrial control panels, switchgear, and MCC solutions. We build for global markets and back every shipment with drawings, test records, and responsive engineering support. Our factory operates under ISO 9001 and follows disciplined build-and-audit routines for consistent quality.
Certification isn’t a badge; it’s a build path. We align design, components, testing, and labels to each market’s rules.
| Region | Mark & Core Path | Typical Scope We Deliver |
|---|---|---|
| United States | UL 508A (industrial control panels), plus UL 891 / UL 1558 where applicable | SCCR labeling, UL-listed components, construction file, NRTL label |
| European Union | CE (per LVD + EMC), built to IEC 61439-1/-2 | Technical file, DoC, assembly verification, EMC evidence |
| Canada | CSA C22.2 (or cUL/cULus) | Canadian code alignment, field evaluation support or listed label |
Outcome: your panel is legal to install, safe to operate, and ready for audit in its destination country.
UL/CE/CSA Certified Control Panels
PLC/HMI panels, I/O marshalling, VFD/soft-starter cabinets, power distribution panels.
Low-Voltage Switchgear (IEC 61439)
Fixed or withdrawable designs, Form 1–4b, IP54–IP65, arc-mitigation options.
Motor Control Centers (MCC)
Fixed, plug-in, or withdrawable buckets; metering and networked protection; easy swap and service.
Stainless & Hygienic Enclosures
NEMA 4X / IP66 for washdown and corrosive sites; thermal design for drives and power supplies.
Custom Junction Boxes & Harnesses
Labeled, ferruled, and documented for fast install and maintenance.
1) Define scope & market
We fix the target law on day one (UL, CE/IEC, CSA). We confirm the AHJ/inspection route and freeze ratings and openings before we cut copper.
2) Engineer the assembly
We size busbars, select certified components, plan segregation (Form 1–4b), and set ingress (IP/NEMA). We run thermal checks and EMC considerations early.
3) Build clean, label clearly
Calibrated torque tools, separated power/control routing, printed ferrules on both ends, terminal plans on doors, and standardized device layouts.
4) Test with a script
Visual, continuity, insulation (when required), full functional I/O simulation, drive start-up settings, and—where applicable—EMC evidence.
5) Document & mark
Nameplate fields per standard (e.g., SCCR for UL 508A; Ue/Uimp/Icw/IP for IEC). We ship GA + one-line + schematics + I/O list + settings + parts list + manuals. A QR code on the door links to the pack.
Passes inspection the first time
Clear labels, correct marks, complete paperwork.
Serviceability built in
Withdrawable buckets, visible isolation, test points, uniform wiring rules.
Lifecycle reliability
Premium components (ABB, Siemens, Schneider, Beckhoff, Phoenix, Rittal), controlled torque, and documented settings for repeatability.
Faster project delivery
Locked drawings, long-lead kitting, weekly photo updates, practical alternates with matching approvals.
Global OEM readiness
Dual documentation (UL + CE) and cULus options for cross-border machine platforms.
Voltage/Frequency: 230–690 V, 50/60 Hz
Short-Circuit Ratings: 35–100 kA (UL SCCR) / Icw/Icc per IEC design
Ingress: NEMA 12/4/4X, IP54–IP66
Separation: IEC Form 1–4b
Controls: 24 VDC control power, safe torque-off (where required)
Networks: EtherNet/IP, Profinet, Modbus/TCP, with managed-switch topologies
Docs: Native CAD + PDF, I/O map, parameter lists, spares, maintenance notes
Process & Utility: water/wastewater, HVAC plants, pumping stations
Food & Beverage: hygienic enclosures, EMC-aware layouts, full labeling
Manufacturing & Logistics: conveyors, packaging lines, AS/RS
Energy & Mining: dust/salt/humidity-resistant builds, higher fault duties
Semiconductor & Electronics: clean routing, EMC discipline, documented torque
Q: Can you raise SCCR without redesigning the whole panel?
A: Often yes—using tested breaker/fuse combinations or current-limiting devices. We confirm with the AHJ.
Q: How do you handle CE EMC?
A: We design to relevant harmonized standards and provide test evidence in the technical file.
Q: Do you support field evaluations in Canada/US?
A: Yes. We coordinate with NRTLs for cUL field evaluation where listing isn’t practical.
Q: How do you protect schedule?
A: Freeze GA/one-line early, kit long leads first, publish a Gantt, run a witnessed (or remote) FAT.
Tel: +86-186-6162-7561
Qiyang Road, Gumiao Industrial Park, Chengyang District, Qingdao City, Shandong Province
