AC DC Regulated Power Supply for Machinery — Factory-Direct Supplier with OEM/ODM & 48-Hour Quotation

✅ 24-month warranty  |  ✅ Free sample for qualified OEM projects  |  ✅ 12,000+ units shipped to 38 countries

Our winding workshop — 100% brand-new copper, no refurbished cores.

1. Voltage Sag Destroys Machine Uptime

A 15% input dip lasting 200 ms is enough to reset a CNC controller mid-cut. Industry downtime benchmarks put unplanned stoppages at $22,000–$260,000 per hour in heavy machining lines. Most "bargain" regulators respond in 1–2 seconds. Ours responds in <0.5 s.

2. Hidden Freight & Duty Costs

A 100 kVA oil-immersed unit weighs roughly 620 kg. Poorly packed, you pay for damage claims and dimensional weight. We ship with IPPC-marked fumigated crates and consolidate LCL to cut your per-unit freight by an average of 18%.

3. Spec Sheet Fiction

Trading companies quote "±1%" accuracy, then ship a unit that measures ±4% under 60% load. Because we are an ac dc regulated power supply factory — not a reseller — every unit is load-tested and the test report ships with the serial number.

4. Certification Gaps Block Customs

Missing CE documentation or an invalid RoHS report can hold a container at Rotterdam for 3–6 weeks. We provide CE, RoHS, ISO 9001 files plus a compliance declaration pack before the container is sealed.

5. No After-Sales Engineering

When a regulator trips at 2 a.m., a trading company sends an email. We provide a 24-hour engineer hotline and remote diagnostics via RS485/Modbus logs — most faults are resolved without a return shipment.

6. Zero Customization Flexibility

Your machine needs 415 V ±10% input, 380 V output, 50 kVA, IP23 enclosure and a custom terminal layout. Distributors say "take what's in stock." We say: drawing in 3 days, sample in 15 days.

🏭 1. True Source Factory — No Middleman Markup

Stamping, welding, insulation, winding, vacuum oil-filling and assembly all happen under one roof. Every core, screw and wire is brand-new — no refurbished laminations, no reclaimed oil. That vertical control is why our wholesale ac dc regulated power supply pricing lands 25–35% under Western distributor rates.

🎯 2. Regulation Accuracy ±0.5% (Optional)

Standard builds deliver ±1%; precision builds reach ±0.5% for medical imaging and laser-cutting machinery. Response time ≤0.5 s at 90% load step, with ≥98% efficiency to keep heat rise under control in sealed cabinets.

🛠️ 3. OEM/ODM Customization in 3 Days

Non-standard voltage, frequency (50/60 Hz), enclosure IP rating, terminal layout, communication protocol and your logo on the panel. Our engineers return a dimensioned drawing within 72 hours and a prototype within 15 working days.

🚀 4. High-Speed Delivery

Standard models ship in 7–12 days; custom builds in 18–25 days. Air freight for samples (3–5 days door-to-door), sea LCL/FCL for volume. Real-time tracking updates every 48 hours until delivery.

🛡️ 5. Quality Assurance, Documented

100% load test + hipot test + insulation resistance test on every unit. MTBF ≥100,000 hours verified by accelerated life testing. Serial-number-linked test reports are archived for 5 years.

☎️ 6. 24-Hour Engineering Support

Direct line to a power engineer — not a call centre. We support remote fault reading via RS485/Modbus logs, spare-part kits shipped within 48 hours, and a 24-month warranty on all standard builds.

Compliance: CE, RoHS, ISO 9001:2015. Declaration of Conformity issued per shipment.

Payment terms: T/T 30% deposit / 70% before shipment; L/C at sight for orders above USD 30,000.

Incoterms: EXW, FOB Shenzhen, CIF, DDP (US & EU lanes available).

🖥️ CNC & Machining Centres

Stabilised 380 V feed for spindle drives and servo amplifiers. One customer in Poland reported a 31% reduction in controller resets within 60 days of installing two KZD-SBW-100 units.

🏥 Medical Equipment

Imaging suites require ±0.5% accuracy and near-zero waveform distortion. Our precision builds pass 72-hour burn-in before shipment.

🚇 Tunnel & Infrastructure

Tunnel boosters maintain voltage along long cable runs where line drop exceeds 8%. Units are built for IP54 enclosures and 40°C ambient.

🏭 Packaging & Injection Moulding

Heater bands and servo presses draw surge currents that destabilise weak grids. Regulated supply keeps cycle times consistent to within ±0.3 s.

💧 Water Treatment & Pumping

VFD-driven pumps are sensitive to phase imbalance. Three-phase correction reduces motor heating and extends winding life.

🔬 Laboratory & Test Benches

Low-capacity KZD-SVC units (1–5 kVA) provide clean 220 V for analytical instruments where a 3% drift would invalidate results.

Markus Reinhardt

Production Engineering Lead · Bavaria, Germany

"We replaced two distributor-brand 80 kVA units with the KZD-SBW-100. Spindle fault alarms dropped from 14 per month to 3 per month. The ±0.5% accuracy was verified on our own Fluke analyser — it matched their test report exactly."

Daniel Okafor

Procurement Manager · Houston, TX, USA

"I ran the numbers three times because the quote looked too good. Landed DDP price came in 34% below our previous EU supplier, and the crates arrived with IPPC stamps and full documentation. That's the first Chinese power supplier I've re-ordered from twice."

Sarah Whitfield

Operations Manager · Manchester, UK

"Our line runs 22 hours a day. Since installing the 200 kVA unit in March, we've had zero unplanned power-related stoppages. Throughput is up 6.2%, which paid for the unit in under four months."

Ahmed Al-Farsi

Technical Director · Dubai, UAE

"We needed a non-standard 415 V input with a 380 V output and a custom terminal arrangement. Drawing arrived in 2 working days, prototype in 16. That responsiveness is not what I expected from a Chinese factory."

Lucas Ferreira

Supply Chain Manager · Melbourne, Australia

"A unit tripped on a Friday night. I sent the Modbus fault log on WhatsApp and had a diagnosis back in under four hours. It was a site wiring issue, not the unit — but they still shipped a spare control board free of charge."

Q1. How do I choose the right kVA rating for my machine?

Add the rated input power of all loads on the circuit, then apply a 1.25 safety factor. For motor-driven machinery with high inrush, use 1.5×. Send us your machine's nameplate photo and duty cycle — our engineers size it free of charge and confirm in writing.

Q2. What is your minimum order quantity for wholesale orders?

MOQ is 1 unit for standard models and 3 units for customized builds. For wholesale ac dc regulated power supply programmes, tiered pricing starts at 10 units, with a further 4–7% reduction at 50 units.

Q3. Can you customize voltage, frequency and enclosure?

Yes. We handle non-standard input/output voltages, 50/60 Hz, IP20 to IP54 enclosures, terminal layout, communication protocol, panel branding and packaging. A dimensioned drawing is issued within 72 hours; prototypes in 15 working days.

Q4. What certifications come with the unit?

CE and RoHS as standard, with ISO 9001:2015 for the manufacturing system. GS and CB are available on request for European projects. Every shipment includes a Declaration of Conformity and a serial-number-linked test report.

Q5. What are your payment terms and Incoterms?

30% T/T deposit with 70% before shipment; L/C at sight accepted above USD 30,000. We ship EXW, FOB Shenzhen, CIF or DDP. For US and EU buyers, DDP lanes include duty and clearance so your landed cost is fixed at quote stage.

Q6. How long is production and shipping?

Standard models: 7–12 days. Custom builds: 18–25 days. Sea freight to the US West Coast runs 16–22 days; to Rotterdam 28–34 days. Air freight for urgent samples is 3–5 days door-to-door.

Q7. What does the warranty and after-sales process look like?

24 months on all standard builds, covering parts and labour. Faults are diagnosed remotely within 24 hours via RS485/Modbus logs. If a replacement part is needed, we ship it within 48 hours by express at our cost during the warranty period.

Q8. Can I get a sample or a factory audit before ordering?

Yes to both. Samples are available for qualified OEM projects, with the sample cost refunded against your first bulk order. We welcome video factory tours and third-party inspections (SGS, Bureau Veritas, TÜV) at any stage of production.

⏳ Q1 2026 Production Slot
Only 18 custom-build slots remain for March–April delivery.

🛡️ Risk-Free Trial
Free sample for qualified OEM projects, sample cost refunded on your first bulk order.

📞 24-Hour Engineer Line
+86 134-3088-0958 / +86 198-4947-5167 — reach a power engineer, not a call centre.