HDR-30 30W DIN Rail Power Supply 85-264VAC Universal Input
Outputs: 12V 2A, 24V 1.5A, 5V 3A. TS-35/7.5 or TS-35/15 mountable. Ideal for compact security control boxes.
Engineered For Critical Deployments
Recommended Power Supplies for Slovak Infrastructure & Security Integrators
Standard-compliant, high-efficiency power conversion topologies engineered directly at our Yueqing factory. Built to resist industrial voltage transients, harsh cold snaps, and non-stop operational cycles across Košice.
3000W Lab Bench Power Supply 0-24V / 0-48V / 0-110V Converter
High precision output regulation for industrial testing, factory burn-in racks, and R&D engineering labs.
100W Industrial SMPS 300VAC Surge Input 5s (12V / 24V / 48V)
Withstands 300VAC transient line spikes for 5 seconds. Integral overload, short-circuit, and thermal trip circuit.
LDV-100 100W IP67 Waterproof Driver 12V 8.3A / 24V 4.2A
Fully potted aluminum chassis, sealed against freezing condensate and rain for outdoor surveillance poles.
LEYU EDR-240-24 DIN Rail PSU 24V 10A 240W Active PFC
Industrial automation standard, metal case DIN rail system with low harmonic distortion for European factories.
3000W High Voltage DC Supply 110V 27.3A Adjustable SMPS
Heavy-duty 220V AC to 110V DC rectification for industrial motors, battery charge banks, and large telecom arrays.
LPV-60-24 60W 24V 2.5A IP67 Waterproof Power Supply
Class II double insulation without FG. Excellent noise immunity for remote perimeter cameras and LED signage.
100W Industrial AC/DC SMPS Wide Input Single Output (50/60Hz)
Low ripple and noise profile (<100mVp-p), high dielectric isolation, and full compliance with CE EMC norms.
Strategic Field Engineering
Localized Application Scenarios in the Košice Regional Market
Košice stands as the central industrial, technological, and logistics hub of Eastern Slovakia (Východné Slovensko). As the second-largest metropolitan area in the Slovak Republic, the region hosts massive heavy industrial complexes, expanding automotive sub-assembly plants, cross-border freight terminals near the Ukrainian border (Čierna nad Tisou transit corridor), and high-density commercial developments. Reliable closed-circuit television (CCTV), access control, and edge-AI visual monitoring demand power conversion electronics built far beyond standard commercial grade.
Heavy Metallurgical & Automotive Plants
Industrial parks across Košice-Šaca and Kechnec feature massive arc furnaces, high-frequency motor drives, and resistance welding machinery. These induce severe conducted electromagnetic interference (EMI) and line voltage sags. Our 300VAC surge-resistant switching power supplies and Active PFC DIN rail units preserve steady 12V/24V DC bus voltage to prevent PTZ camera dropouts and telemetry loss.
Logistics Parks & Border Freight Depots
Facilities situated around the Košice Airport industrial zone and Haniska railway terminals require uninterrupted perimeter analytics. Video surveillance cameras operate continuously alongside high-power infra-red illuminators and thermal optical units. Our modular LRS and S-series enclosed power units deliver clean multi-channel DC power with independent fuse rails.
Sub-Zero Winter & Harsh Microclimates
Eastern Slovakia’s continental winter regularly delivers temperatures below -20°C with heavy frost cycles. Standard budget commercial SMPS units frequently suffer from cracked electrolytic sealings and cold-start oscillator failures. Keldan's LDV and LPV IP67 waterproof series use thermally conductive silicone potting to ensure cold-start stability down to -30°C.
Market Dynamics & Future Outlook
Key Technological Trends Driving CCTV Power Procurement in Slovakia
Modern security installations across the Košice metropolitan district and Prešov edge territory are experiencing a structural transformation away from simple analog recording toward automated, AI-driven Smart City ecosystems. System engineers must anticipate several key technical trends:
1. Power-over-Ethernet (PoE++ 802.3bt) Headroom
High-throughput 4K multisensor cameras and pan-tilt-zoom units equipped with internal heater blowers pull up to 60W–90W per network drop. Centralized DIN Rail power supplies feeding industrial PoE switches require sustained 48V to 55V DC output with reserve headroom exceeding 25% to handle simultaneous camera boot surges.
2. Stringent EU EcoDesign & Low No-Load Losses
Energy efficiency mandates in the European Union (ErP Directive 2009/125/EC) strictly penalize high idle consumption. Modern municipal tenders in Slovakia prioritize SMPS architectures with standby no-load power consumption below 0.3W and active conversion efficiencies above 89%, reducing lifecycle thermal accumulation in enclosed metal junction boxes.
3. Harmonized Compliance (CE, EN 55032 Class B)
Slovak technical inspectors and fire safety underwriters require unambiguous CE markings, EN 62368-1 electrical safety certs, and EN 55032/EN 55035 EMC conformity. High-density urban projects mandate low conducted radiation to avoid interference with local 5G telecommunication networks and telemetry sensors.
| Topological Series | Standard Slovak Application | Input Transient Tolerance | Operating Temperature | EMC / Safety Compliance |
|---|---|---|---|---|
| HDR Slim DIN Rail (30W-150W) | Compact roadside junction boxes, building automation panels | 85–264VAC universal input | -30°C to +70°C derated | EN 62368-1, EN 55032 Class B |
| EDR / DRP Rail (120W-480W) | Industrial plant control cabinets, central PoE injectors | Active PFC (PF > 0.95), 300VAC surge | -20°C to +60°C full load | EN 61000-3-2, Heavy Industry EMC |
| LRS CCTV Enclosed (35W-350W) | Central server racks, multi-camera distribution cabinets | 110V/220V AC selectable, 5s 300VAC | -25°C to +70°C | CE, RoHS, Overvoltage Cat III |
| LDV/LPV Waterproof (60W-150W) | Perimeter fence poles, unheated outdoor enclosures | 180–264VAC / 90–264VAC | -30°C to +70°C (IP67 Sealed) | IP67, SELV design, double insulation |
Direct Manufacturing Authority
Yueqing Keldan Technology Co., Ltd. — Your Direct Manufacturing Ally
Situated in the Beibaixiang electrical manufacturing heartland of Yueqing, Zhejiang, Keldan operates as an audited custom manufacturer with an integrated export team. Rather than sourcing from middlemen or trading brokers, our B2B partners across Central and Eastern Europe gain direct access to our manufacturing floor and testing laboratories.
Our facility is onsite-verified by TÜV Rheinland, validating our automated production workflows, precision optical inspection gear, and comprehensive failure screening processes.
- Advanced In-House Production: SMT surface mount placement, automated reflow soldering, and component lead trimming under tight IPC quality benchmarks.
- Multi-Stage Screening: Automated Optical Inspection (AOI), manual wave-solder touchup, and individual unit calibration for ripple/noise performance.
- 100% Full-Load Burn-In: Every power supply runs through our dynamic thermal burn-in racks before boxing, eliminating early-life semiconductor failures.
- Flexible OEM/ODM Customization: Custom DC voltage taps (e.g., 13.8V battery float, 48V telecom), customized multi-channel screw terminal blocks, and custom branding.
Clear Technical Answers
Frequently Asked Questions by Slovak B2B Buyers & Integrators
Addressing the practical customs, certification, electrical, and logistics inquiries common to security distributors and engineering contractors in Košice.
Are Keldan power supplies fully certified for legal import and commercial deployment in Slovakia?
Yes. All our exported power supplies carry full CE marking, which includes formal testing declarations according to the Low Voltage Directive (LVD 2014/35/EU) and the Electromagnetic Compatibility Directive (EMC 2014/30/EU). Our switching topologies adhere to EN 62368-1 safety standards and EN 55032 / EN 55035 interference limits. Complete Declaration of Conformity (DoC) certificates, test reports, and RoHS material compliance statements are provided with shipping documentation to ensure smooth Slovak customs clearance at Košice International Airport (KSC) or inland border posts.
What delivery logistics channels do you utilize for consignments destined for Košice?
Depending on order urgency and volume, we support three primary channels: For sample units and urgent site replacements (1–100 pcs), we ship via air express (DHL, FedEx, UPS) directly to your Košice address with transit times of 4–7 business days. For standard wholesale consignments (palletized FCL or LCL), shipments arrive via sea freight through European ports such as Koper or Hamburg, followed by bonded bonded rail/truck transport into Eastern Slovakia (transit typically 28–35 days). Air cargo services into Vienna (VIE), Budapest (BUD), or Košice (KSC) are also routinely coordinated.
How do Keldan power supplies endure extreme seasonal weather and sub-zero temperatures in Eastern Slovakia?
In outdoor poles and unconditioned junction cabinets around Košice, winter temperatures can fall below -20°C. Standard cheap power supplies experience elevated equivalent series resistance (ESR) in their electrolytic capacitors, preventing stable oscillation. Keldan uses high-grade 105°C long-life capacitors with low low-temperature ESR ratings. Our outdoor series (LDV and LPV) are filled with UL94V-0 rated thermal silicone elastomer, preventing moisture condensation during rapid day-night freeze-thaw cycles and rated down to -30°C cold-start.
Can we request custom output voltages for specialized CCTV battery-backup (UPS) float charging?
Yes. Many CCTV and access-control security panels in Slovakia utilize sealed lead-acid (SLA) or LiFePO4 backup batteries. Our engineering team can configure custom transformer windings and secondary feedback loops to produce dedicated float voltages such as 13.8V (for 12V backup systems) or 27.6V (for 24V automation loops), complete with auxiliary trickle-charge outputs and low-voltage battery disconnect circuitry to guard against deep discharge.
What is the Minimum Order Quantity (MOQ) for wholesale and custom OEM private branding?
For standard catalogue items (HDR, LRS, S-Series, and LDV), we support rapid prototyping and pilot testing with MOQs starting as low as 1 piece for evaluation samples, and standard master carton quantities starting from 10 to 20 units. For customized OEM production—including private laser-engraved or silk-screened metal casing, localized multilingual packaging, and tailored terminal block configurations—our typical project MOQ starts at 100 to 300 pieces depending on casing tooling requirements.
How does Keldan handle warranty fulfillment and batch quality verification for European partners?
We back our industrial switching supplies and DIN rail modules with a comprehensive 24 to 36-month factory warranty. Every production batch is tracked with unique internal serial barcoding, allowing us to trace incoming material batches, automated optical inspection records, and individual burn-in test curves. In the improbable event of an in-field defect rate exceeding agreed thresholds, we provide root-cause failure analysis (8D Report) alongside immediate product replacement or credit issuance on subsequent invoices.
