Factory Inventory & Deployment
Featured Industrial Power Supplies & DC-DC Switching Modules
Factory-direct conversion units manufactured under verified TÜV Rheinland oversight, supporting DIN-rail integration, ultra-wide input margins, and high-efficiency power continuity across Kyiv's demanding operating conditions.
18+
Years SMPS & DC-DC Expertise
3,000V
Galvanic Isolation Rating
100%
Full-Load Thermal Burn-In
TÜV
Onsite Verified Production Lines
Operational Context: Kyiv & Oblast
Engineering DC-DC Power Architectures for Grid Volatility
The contemporary electrical operating environment within Kyiv demands conversion modules that maintain line-regulation stability amidst acute frequency dips, blackouts, and variable energy storage bus voltages.
Decentralized Battery Energy Storage (BESS)
Commercial facilities, hospitals, and critical shelters across Kyiv have transitioned to decentralized Lithium Iron Phosphate (LiFePO4) and lead-acid backup banks. Our isolated DC-DC modules step down fluctuating nominal 48VDC or 96VDC battery banks directly to precision 12VDC, 24VDC, or point-of-load voltages. Wide 4:1 input ranges ensure continuous PLC, telemetry, and contactor operation whether the battery bus sits at 58.4V during rapid generator charge cycles or drops below 40V under heavy discharge states.
Cellular Towers & Fiber Internet Backhaul
Maintaining uninterrupted telecommunications throughout Kyiv and satellite districts like Irpin, Bucha, and Brovary requires high MTBF isolated converters. When utility feeds collapse, base stations rely on hybrid generator-solar-storage feeds. Our converters feature 3000VAC / 4242VDC isolation barriers that suppress induced line surges, ground loops, and lightning transients, isolating sensitive optical transceivers and edge routers from high-voltage DC distribution strings.
Municipal Pumping & Heating Automation
District heating substations and water distribution hubs run automation loops using standard 24VDC control circuits. Utilizing models like the EDR-120 and DRP-240 series on TS-35 DIN rails allows Kyiv municipal automation engineers to bridge central battery feeds directly to field sensors, solenoid valves, and SCADA monitoring nodes, bypassing dirty AC generator sine waves and mitigating brownout shutoffs entirely.
| Subsystem Topology | Input Range (DC) | Regulated Output | Isolation Rating | Kyiv Operational Suitability |
|---|---|---|---|---|
| BESS Step-Down Bus | 36 – 72 VDC (48V nominal) | 24V ±1.0% @ 10A | 2,000 VAC | Prevents PLC restart during battery float/equalization voltage spikes. |
| Telecom Base Station Rail | 18 – 36 VDC / 36 – 75 VDC | 12V, 48V Regulated | 3,000 VAC | Suppresses ground potential shifts between battery bank and antenna mast. |
| District Automation Cabinets | 85 – 264 VAC / 120 – 370 VDC | 24V @ 5A – 20A | 3,000 VAC | Dual-input compatibility; can run off AC mains or central HVDC backup bus. |
| Outdoor Security & Lighting | Universal 90 – 264 VAC | 12V / 24V Constant Voltage | IP67 Enclosure | Withstands winter condesation, sub-zero frost, and outdoor perimeter mounting. |
Market Trends & Engineering Outlook
Key Shifts Driving Kyiv's DC Power Equipment Procurement
As Kyiv transitions from centralized legacy infrastructure toward distributed, hardened microgrids, system integrators are actively restructuring their power electronics supply chains.
Direct-DC Microgrid Topologies
Converting AC generator power to DC battery storage and back to AC introduces cascading 10-18% thermal losses. Procurement engineers in Kyiv are standardizing on Pure DC architecture inside control cabinets. By coupling DC-DC converters directly to renewable solar arrays and 48V storage strings, industrial plants eliminate unnecessary inverter stages, cutting fuel demand and extending runtimes during emergency load shedding.
Rapid Field Replacement & Form Factors
Logistical disruption requires standard TS-35 DIN rail mounts and slim enclosed 1U profiles (such as the LRS series) to be universally swappable. Kyiv maintenance technicians favor standard terminal block connections and broad input-voltage tolerance over proprietary OEM footprints, ensuring swift swap-outs without rewiring entire distribution boards.
Stringent Component De-Rating for Cold Climates
Winter operations in Ukraine routinely see sub-station ambient temperatures plummeting to -25°C followed by high heat-soak during unventilated container operation in summer. Industrial power supplies must feature industrial-grade long-life electrolytic capacitors rated at 105°C and cold-start capabilities at -30°C to eliminate startup latch-up failures.
Factory-Direct Quality Assurance
Engineering Capabilities: Yueqing Keldan Technology Co., Ltd.
Positioned in Yueqing, Zhejiang—the epicenter of low-voltage electrical engineering—our factory provides direct OEM/ODM power solutions audited by TÜV Rheinland for global mission-critical projects.
Automated SMT & AOI Lines
Equipped with high-speed surface-mount technology (SMT) and automated reflow soldering ovens. Every PCB passes automated optical inspection (AOI) to eliminate solder bridging, tombstoning, and polarity misalignment before mechanical integration.
100% Full-Load Burn-In Testing
Zero-defect deployment is mandatory. All power supply and converter modules undergo rigorous, multi-hour burn-in aging racks under full thermal load to force infant mortality screening prior to final export boxing and customs release.
OEM / ODM Engineering Support
Staffed by senior power electronics engineers with 5+ years of SMPS design experience. We handle sample-based and schematic customization: conformal coating for damp environments, customized DC input ranges, and private labelling.
TÜV Verified & CE Certified
Onsite verified by TÜV Rheinland, validating our 44 onsite manufacturing personnel, incoming material QA/QC, cleanroom assembly standards, and streamlined export protocols across European freight transit routes.
Kyiv Procurement FAQ
Frequently Asked Questions by Ukrainian Engineers & Buyers
Practical answers concerning electrical compatibility, customs clearance, logistics routing to Kyiv, and unit resilience.
How do Keldan DC-DC and switching converters handle erratic generator voltage swings?
Our modules feature wide AC input ranges (typically 85–264 VAC) and 2:1 or 4:1 DC input spreads, complemented by active transient suppression circuitry (varistors and high-capacity input smoothing stages). When local diesel or petrol generators suffer from unstable frequency or THD during sudden load steps, our closed-loop PWM controllers maintain steady, regulated line output without dropouts.
Can these modules operate in unheated outdoor cabinets during Kyiv winters?
Yes. Standard units are rated for cold start-up at -20°C, while our industrial DIN rail (NDR/EDR) and IP67 waterproof LED driver series operate stably down to -30°C. For extreme field conditions, we can apply optional multi-layer conformal coating (acrylic or silicone) to prevent condensation short-circuits during freeze-thaw cycles.
What logistics and shipping channels are available for delivery to Kyiv?
We handle scheduled freight dispatch from our Yueqing factory. For urgent replacement batches, we utilize air cargo via European hubs (such as Warsaw or Budapest) followed by overland bonded transport directly into Kyiv customs terminals. For volume stock replenishment, standard multimodal rail and sea freight routes through European ports are coordinated by our 12-member trading team.
What is the minimum order quantity (MOQ) for Kyiv engineering projects?
Standard DIN rail and enclosed switching units (e.g., EDR-120, LRS-150) are available with an MOQ of just 1 piece for sample evaluation and prototyping. Production volume orders for standard catalog items start from 10–15 pieces, while tailored OEM projects (such as modified DC input spans or special pinouts) feature flexible, project-specific minimums.
Do Keldan power converters carry full CE documentation for Ukrainian compliance?
All standard models are CE-marked and comply with European Low Voltage Directive (LVD) and Electromagnetic Compatibility (EMC) standards (EN 55032, EN 61000-4-2/3/4/5/6/8/11). Detailed test reports, declarations of conformity, and technical datasheets are supplied to facilitate smooth import declaration and certification checks in Ukraine.
Can we specify custom DC-DC conversion steps for non-standard battery banks?
Yes. Our in-house R&D engineering department specializes in OEM/ODM conversions. Whether your application requires step-down conversion from custom 60V, 72V, or 110V DC banks to regulated 12V/24V, or custom multi-channel outputs with galvanically isolated ground planes, we can design, sample, and produce matching units based on your schematics.
