Our Product Range
Complete high & low voltage electrical equipment — engineered for reliability, built for decades of service.
Medium Voltage Switchgear
Indoor metal-enclosed switchgear for 12 / 24 / 40.5 kV distribution — air-insulated metal-clad withdrawable cabinets for primary distribution and protection, plus gas- and solid-insulated ring main units (RMU) for compact secondary distribution, all built to IEC 62271-200.
KYN28-12 Metal-Clad Withdrawable Switchgear (12 kV)
Air-insulated, metal-clad withdrawable switchgear for indoor 3.6–12 kV, three-phase 50 / 60 Hz single-busbar and sectionalized-busbar systems — HARRL's workhorse MV cabinet and the most widely deployed model in the range. The enclosure is divided into four independent compartments (busbar, circuit-breaker, cable and low-voltage), each fitted with a pressure-relief channel for arc venting, and a five-prevention mechanical interlock guards against misoperation. Accepts VS1 / ZN63A-12 (or equivalent) withdrawable vacuum circuit breakers; supports wall-mount and back-to-back arrangements.
KYN28-24 Metal-Clad Withdrawable Switchgear (24 kV)
Air-insulated, metal-clad withdrawable switchgear for indoor 24 kV, three-phase 50 / 60 Hz single-busbar and sectionalized-busbar systems. The enclosure is divided into four independent compartments (busbar, circuit-breaker, cable and low-voltage) in aluminium-zinc coated steel, with a five-prevention mechanical interlock — used in substations, industrial plants, renewable-energy collection stations and commercial buildings.
KYN61-40.5 Metal-Clad Withdrawable Switchgear (40.5 kV)
Air-insulated, metal-clad withdrawable switchgear for indoor 40.5 kV, three-phase 50 Hz single-busbar systems — the highest MV level in HARRL's switchgear range. Applied in 35 kV-class substations, power plants, mining and heavy-industry feeds. The handcart uses a screw-nut propelling mechanism allowing all operations with the door closed, and accepts composite-insulated or ZN85-40.5 vacuum circuit breakers.
MVnex Compact MV Switchgear (12 / 24 kV)
Built on the Schneider Electric MVnex design, this compact medium-voltage switchgear platform is engineered with CAD, synthesis-laboratory and dynamic-simulation tools. Designed around real installation, operation and maintenance conditions — reliable in long-term service, simple to operate locally via a front-panel mimic diagram, and safe through full mechanical and electrical interlocking plus internal arc-fault containment. Available in two voltage classes: MVnex-12 (12 kV) and MVnex-24 (24 kV). MVnex is a trademark of Schneider Electric.
HLXGN-12 Gas-Insulated Ring Main Unit (12 kV)
Unit-type, gas-insulated metal-enclosed ring-network switchgear for 12 kV, three-phase 50 Hz distribution and ring-network systems, designed for urban grids, prefabricated / compact substations and renewable-energy collection. A sealed gas compartment (IP67, ≤ 0.01 % annual leakage) houses the load-break switch, giving a maintenance-free, compact and fully interlocked unit with a 10 000-operation mechanical life.
SLG-12 Solid-Insulated Compact Ring Main Unit (12 kV)
A solid-insulated compact ring-main unit for 12 kV ring-network and radial distribution, using a load-break switch as the main switching device in a fully insulated, factory-assembled enclosure. Low partial discharge (< 10 pC at 14.4 kV) and a sealed IP67 switchgear body give a maintenance-free, space-efficient unit for compact secondary substations and urban installations.
HLC-12 Gas-Insulated Modular RMU / C-GIS (12 kV)
A gas-insulated, fully sealed modular ring-main unit (C-GIS style) for 12 kV ring-network and cable distribution. Built from independent functional units — C (load-switch / cable), F (load-switch-fuse) and V (vacuum circuit breaker) — so configurations can be combined per project. A pressurized gas tank (IP67, ≤ 0.01 % annual leakage) and IK10-rated, IP54 switchgear body deliver a compact, maintenance-free unit for urban and underground networks.
Low Voltage Switchgear
Low-voltage switchgear assemblies for power distribution, motor control and reactive compensation — withdrawable, fixed and modular type-tested assemblies to IEC 61439.
MNS Withdrawable LV Switchgear
A modular, withdrawable-type low-voltage switchgear for power conversion, distribution and motor control in AC 50 / 60 Hz, 400 V systems. Functional units are drawable for live maintenance and fast reconfiguration, making it suited to power plants, petrochemical, metallurgy and large commercial / industrial distribution.
GGD Fixed-Type LV Switchgear
A fixed-pattern low-voltage switchgear for power conversion, distribution and control in AC 50 / 60 Hz, 400 V systems with operating current up to 4000 A. The frame is assembled from locally welded cold-formed sections for high rigidity, and parts follow a 20 mm modular hole pattern for high standardization.
GGJ Reactive-Power Compensation Switchgear
A low-voltage capacitor / reactive-power compensation switchgear that compensates reactive losses, raises power factor and reduces line loss — improving the load capacity and power quality of the distribution grid. It monitors three-phase voltage, current and power factor in real time; capacitors and reactors are precisely matched to suppress harmonics and protect the circuit. Common in power plants, petroleum, chemical, metallurgy, textile and high-rise building distribution.
BLOKSET Modular LV Switchboard
Based on the Schneider Electric BLOKSET design, this modular low-voltage switchboard system serves power distribution and motor control across industrial and commercial installations. Built from standardized functional columns supporting fixed, disconnectable and withdrawable units (2M–12M), it scales from incoming / distribution boards to large main LV switchboards, and is qualified to demanding seismic, salt-spray, altitude and EMC requirements. BLOKSET is a trademark of Schneider Electric.
Transformers
Cast-resin dry-type and oil-immersed distribution transformers from 30 kVA to 25 MVA — low-loss SCB and S22 / S20 / S13 generations to IEC 60076 and current GB efficiency standards.
SCB Series Cast-Resin Dry-Type Transformer (10 / 20 / 35 kV)
Three-phase epoxy-resin vacuum-cast dry-type distribution transformer — oil-free and self-extinguishing, suitable for installation directly at the load center. Low partial discharge and low noise, F/H-class insulation, moisture-resistant (re-energizable after shutdown without pre-drying), maintenance-free, and capable of forced-air (AF) overload with full temperature protection. Available in SCB12 / SCB14 / SCB18 generations across 10 / 20 / 35 kV classes. Ideal for high-rise buildings, hospitals, data centers, metro, commercial complexes, renewable plants and indoor substations.
Oil-Immersed Distribution Transformer (S22 / S20 / S13)
A three-phase oil-immersed distribution transformer for indoor and outdoor service, with high full-load efficiency and strong overload / high-temperature tolerance. Offered in S22 / S20 / S13 generations; the newer low-loss cores cut no-load loss for better lifecycle energy cost, suiting outdoor substations and capacities across the distribution range.
Substations
Prefabricated compact substations integrating MV switchgear, transformer and LV distribution — European box, American pad-mounted, Chinese multi-room and turnkey E-House layouts.
European-Type Substation (YB / YBM Box-Type)
A prefabricated compact substation in the European layout: MV switchgear (RMU), distribution transformer and LV switchgear housed in separate internal compartments within a single weatherproof enclosure. Type-tested as a complete assembly to IEC 62271-202 — the natural choice for IEC-signatory markets (Southeast Asia, Middle East, Africa). Handles larger transformer capacities than the American type — used for neighborhoods, hotels, large work sites, industrial parks and renewable plants.
American-Type Substation (ZGS Pad-Mounted)
A pad-mounted compact substation in the American layout, built around an oil-immersed transformer with the MV load-break switch and fuse protection immersed directly inside the transformer tank. A double-tank horizontal arrangement keeps HV and transformer sections independently maintainable. Fully sealed and insulated (no clearance required), occupying only ~1/3–1/5 of the footprint of an equivalent European box substation — ideal for residential areas, malls, airports, railways and renewable sites.
Chinese-Type Substation (YB / ZBW)
A prefabricated compact substation in the Chinese layout: a single outdoor enclosure partitioned into separate rooms — MV switchgear, transformer and LV distribution — each independently accessible. Offers a wide choice of MV switching configurations and the highest capacity ceiling of the three styles, suiting urban distribution, industrial parks and grid upgrades.
E-House — Prefabricated Modular Electrical Room
A factory-built, fully integrated electrical building (containerized or modular steel structure) housing MV/LV switchgear, transformers, control and protection, auxiliary power, HVAC and fire systems. Fully assembled and tested at the factory, then shipped as a turnkey unit — drastically cutting on-site construction time. Widely used in renewable-energy plants (solar / wind), oil & gas, mining and large industrial projects, especially in remote or harsh-environment sites across the Middle East and Africa.