Dehler
Dehler
Explore our precision-engineered high & low voltage equipment designed for maximum operational safety, environmental resistance, and grid reliability.
In modern medium-voltage (MV) power distribution networks (ranging from 10kV to 35kV), the transition from traditional overhead line distribution to underground power cabling systems has accelerated worldwide. As urban power densities escalate, industrial mega-parks expand, and renewable energy integration becomes mandatory, utility operators and enterprise electrical engineers demand hyper-reliable, maintenance-free, and modular outdoor cable distribution nodes. This is where Custom Modular Cable Branch Boxes (also designated as Cable Distribution Cabinets or Outdoor Tap Boxes) serve as the essential connective backbone.
A modular cable branch box is an outdoor or indoor enclosed switchgear assembly engineered to branch, tap, sectionalize, or bridge high-voltage underground cable circuits. Designed around pre-molded, touchable, fully insulated, and hermetically sealed solid or gas-insulated busbar architectures, these enclosures replace traditional open copper busbar pits. They mitigate structural risks associated with environmental contamination, flood submersion, chemical degradation, and accidental human contact.
Utilizes fully shielded, fully sealed EPDM or silicone rubber separable connectors (T-connectors and elbow connectors). Features a compact footprint, maintenance-free operation, and high environmental protection (IP67/IP68 submersible capability). Ideal for urban dense distribution grids.
Incorporates loadbreak bushings and separable insulated connectors with visible break points and integrated grounding switches. Engineered for multi-loop utility networks requiring frequent circuit isolation, manual bypass switching, and sectionalized fault isolation.
Integrates SF6-free or vacuum Ring Main Units (RMU), motorized actuators, micro-processor Fault Indicator Units (FIU), and Remote Terminal Units (RTU) with IEC 60870-5-104 or DNP3 telemetry for autonomous self-healing power grids.
Dehler Technology Co., Ltd., established in 2016, is a high-tech power equipment manufacturer located at No. 271, Weishiqi Road, Yanpan Economic Development Zone, Yueqing City, Zhejiang Province. To support continuous enterprise scale expansion, our specialized Electrical Complete Equipment & Transformer Division is situated at No. 178, Jingba Road, Economic Development Zone.
As an integrated technology enterprise spanning R&D, structural design, precision production, global sales, and engineering support, Dehler specializes in high and low voltage power distribution equipment. Our core product lines include high & low voltage switchgears, prefabricated compact substations, outdoor modular cable branch boxes, indoor & outdoor vacuum circuit breakers (VCB), loadbreak disconnectors, earthing switches, and high-conductivity copper electrical components.
Operating under the core philosophy of "Survival through quality, development through technology, and efficiency through management," Dehler serves critical infrastructure sectors including utility power generation, railway electrification, metallurgical steel mills, underground coal mining, chemical plants, telecom data centers, commercial shipbuilding, offshore oil platforms, and utility-scale solar/wind farms.
Over the years, Dehler has continuously upgraded its production capabilities and expanded product lines to meet stringent international standards. Strengthening quality management is our prerequisite for international market expansion. We strictly enforce ISO9001, ISO14001, and ISO45001 standardized management systems, implementing 100% routine dielectric tests, partial discharge (PD) testing, and thermal rise analysis on all modular cable branch assemblies.
“High-quality products, superior technology, and impeccable service” represent our unyielding commitment. Facing international industrial electrical advancements, Dehler formulates custom OEM/ODM technical solutions. We innovate business models, enhance localized engineering response capabilities, improve global logistical channels, and provide rapid-turnaround custom modular cable branch enclosures customized for extreme climate deployment.
The global market for modular cable branch boxes is experiencing exponential growth, driven by key macroeconomic and technological shifts in grid modernization.
Metropolitan municipalities worldwide are replacing unsightly overhead power lines with underground cable channels to enhance urban aesthetics and mitigate storm damage. Modular cable branch boxes are essential to distribute localized feeder lines to multi-story buildings and residential sub-districts without building expensive underground concrete vaults.
The rollout of 350kW+ Ultra-Fast EV Charging hubs requires high-power medium-voltage step-down nodes. Custom cable branch boxes allow operators to effortlessly loop into main 12kV/24kV utility mains, feeding multiple transformer units with minimal site downtime.
Large-scale solar PV fields and wind turbine arrays rely on modular branch cabinets to aggregate power outputs from dispersed inverter stations before stepping up voltage to primary collector substations.
The structural durability of an outdoor cable branch box is directly proportional to its material selection, busbar geometry, and internal insulation media. Below is an engineering overview of our modular options:
| Parameter / Feature | European Style Branch Box | American Style Branch Box | Intelligent Smart Branch Cabinet |
|---|---|---|---|
| Rated Voltage (Ur) | 12kV / 24kV / 40.5kV | 15kV / 25kV / 35kV | 12kV / 24kV |
| Rated Current (Ir) | 630A (Main Bus), 200A (Branch) | 600A (Deadbreak), 200A (Loadbreak) | 630A to 1250A |
| Short-Time Withstand (Ik) | 20kA / 25kA for 4s | 20kA / 25kA for 3s | 25kA / 31.5kA for 4s |
| Enclosure Material Options | 304/316 Stainless Steel, SMC Composite | 2.0mm Heavy-Duty Galvanized Steel | Double-Layer Insulated Stainless Steel |
| Insulation Type | Solid Silicone Rubber Shielded | EPDM Molded Rubber Insulation | SF6 Gas / Environment Green Gas / Solid |
| Ingress Protection | IP67 Enclosure / IP68 Submersible Bus | IP65 Enclosure / IP67 Connectors | IP65 Outdoor Enclosure Grade |
Our outdoor cabinets utilize anti-corrosive enclosures constructed from 2.0mm 304 or 316L stainless steel, or fiberglass-reinforced Sheet Molding Compound (SMC). The exterior undergoes electrostatic fluorocarbon powder coating, providing high resistance to salt spray, ultraviolet degradation, and physical impacts (IK10 impact rating).
Internal main busbars are manufactured from 99.9% purity T2 electrolytic copper, coated with high-dielectric epoxy resin or tin/silver plating to minimize contact resistance. Interfacing with cross-linked polyethylene (XLPE) cables is achieved via standardized IEC/IEEE separable connectors featuring groundable outer conductive shields.
Customization is critical because power distribution hardware must withstand varying micro-climates and operational challenges across global regions.
Deployed in coastal industrial complexes and port facilities. Features 316L marine-grade stainless steel enclosures with passive ventilation traps that block salt-laden air, preventing internal tracking and corrosion.
Engineered with increased internal creepage distances and reinforced gas containment to compensate for low atmospheric pressure and extreme temperature swings (-40°C to +45°C).
Utilizes explosion-resistant, sealed composite housings to prevent corrosive chemical gases (H2S, SO2) from degrading conductive contacts and internal insulators.
Designed with fully submersible IP68 insulated busbar trees and EPDM connectors, guaranteeing uninterrupted medium-voltage power distribution even during temporary vault flooding.
The power distribution industry is evolving toward decarbonization, digitalization, and enhanced asset monitoring. Dehler’s R&D roadmap focuses on three primary technological vectors:
In compliance with global greenhouse gas regulations, our next-generation branch units incorporate Clean Air (dry air), Fluoronitriles gas mixtures, or 100% Solid Insulation systems, eliminating SF6 gas (which has a global warming potential 23,500x higher than CO2).
Integrating non-contact SAW (Surface Acoustic Wave) temperature sensors and UHF Partial Discharge monitoring modules inside the cable termination chamber. Real-time condition data is transmitted wirelessly to cloud SCADA platforms for predictive maintenance.
Combining motorized loadbreak switches with directional fault indicators enables Fault Location, Isolation, and Service Restoration (FLISR). Faulty cable segments can be isolated in under 500 milliseconds, minimizing grid outage duration.
Read expert insights from our power engineering team regarding custom modular cable branch box selection, installation, and maintenance.
European-style branch boxes utilize fully shielded, touch-proof rubber connectors (such as T-connectors) connected to busbar blocks, emphasizing micro-compact footprints and maintenance-free IP68 operation. American-style branch boxes emphasize deadbreak/loadbreak bushings with separable connectors and visible break disconnectors, allowing operators to easily ground or isolate individual line loops during live maintenance.
By using fully insulated, conductive-shielded rubber terminations, the conductive copper busbar is completely isolated from atmospheric air. Even if the outer metal housing is accessed, the cable terminations are touch-safe, preventing accidental flashovers caused by vermin intrusion, moisture ingress, or direct human contact.
Yes. We specialize in custom OEM engineering. For marine environments, we fabricate enclosures using 316L stainless steel with anti-corrosive fluorocarbon powder coating. For high-altitude or low-temperature environments, we integrate internal thermostatically controlled anti-condensation heaters and custom insulation interfaces.
Our custom modular cable branch boxes are rated for medium-voltage networks operating at 12kV, 24kV, and 40.5kV (or US ratings of 15kV, 25kV, and 35kV). Busbar continuous current capacities range from 630A to 1250A, with short-time short-circuit withstand capabilities up to 31.5kA for 4 seconds.
Absolutely. We can equip cable branch boxes with internal SF6 or solid-insulated Ring Main Units (RMU), motorized actuators, capacitive voltage sensors, fault passage indicators (FPI), and feeder remote terminal units (FRTU) supporting IEC 60870-5-104 or Modbus TCP protocols for full SCADA integration.
Our outer metallic or composite enclosures achieve IP65 to IP67 protection against dust and driven rain. The internal pre-molded rubber cable connector modules are rated at IP68, capable of continuous operation under total water submersion.
Because the internal high-voltage electrical connections are hermetically sealed and fully insulated, routine internal busbar maintenance is virtually zero. Recommended maintenance is limited to annual visual inspections of exterior paint, verifying seal integrity, and inspecting internal anti-condensation heating elements.
Each cable branch cabinet includes an internal continuous copper grounding busbar (typically minimum 30mm x 4mm cross-section). All metallic enclosure panels, cable armor clamps, and outer conductive shields of separable connectors must be connected directly to this main ground bar to ensure operator safety.
Dehler products are manufactured in compliance with international standards, including IEC 62271-200 (for AC metal-enclosed switchgear), IEC 60529 (for IP protection ratings), IEEE 386 (for separable insulated connector systems), and national GB/T standards.
Standard modular configurations are typically produced within 2 to 3 weeks. Fully customized solutions involving smart SCADA integration, specialized stainless enclosures, or non-standard voltage ratings usually take 4 to 6 weeks, including rigorous factory acceptance testing (FAT).
Dehler has established long-term, stable strategic partnerships with power utilities, industrial EPC contractors, and equipment distributors worldwide.
Browse our complete product catalog, featuring high-voltage circuit protection, reactive compensation cabinets, and custom copper contact accessories.
