HP-ELS-V Eco-Gas Insulated Switchgear (C-GIS)
12/24/40.5 kV C-GIS using dry air or nitrogen instead of SF6 — fully welded stainless-steel gas tank up to IP67, vacuum interruption and complete five-prevention interlocking.
- Fully sealed welded enclosure in stainless steel, protection level up to IP67, isolating dust and moisture
- Independent gas-tank structure: MV components enclosed in a sealed stainless-steel tank, immune to small anima
- Rational layout: busbar module on top, three-position disconnector/earthing switch in the middle, breaker or l
- Spacious cable compartment for parallel cables and additional surge arresters; all cable plugs at the same hei
A cleaner, more reliable approach to MV switching
The HP-ELS series replaces SF₆ with environmentally friendly insulating media while keeping the proven safety and performance utilities expect from gas-insulated switchgear.
Insulating Medium
Dry air or nitrogen: Dry air or nitrogen replaces SF₆ as the insulating medium — eco-friendly, avoiding SF₆ emissions and the switchgear faults caused by reduced insulation and arc-quenching performance from SF₆ liquefaction.
C4/C5 synthetic gas with CO₂: Selected eco-gas models use this mixture, delivering insulation performance equal or close to SF₆ while meeting the switchgear's dielectric requirements.
Structural Design
Fully-sealed welded enclosure: Generally built from stainless-steel plate and fully seam-welded, with a high protection degree up to IP67 that effectively isolates dust and moisture to protect internal components.
Independent gas-tank structure: Medium-voltage components sit inside a fully enclosed stainless-steel gas tank, shielded from small animals, corrosive gases, humidity, dust and sunlight, improving insulation stability.
Reasonable layout: Busbar module on top, three-position isolation/earthing unit in the middle, breaker/load-break unit at the bottom; the cable chamber offers ample space for parallel cables and extra surge arresters, with plugs at the same height for parallel installation.
Core Components
Vacuum interrupter: Small contact gap, short arcing time, slight burn-off when breaking fault current, low operating energy and fast action; compact, light, low-maintenance, fire- and explosion-resistant and quiet — an ideal replacement for oil and SF₆ breakers.
Three-position isolation/earthing switch: Isolation, earthing and open positions deliver circuit isolation and earthing protection, working with the breaker to control and protect the circuit.
Safety Protection
Pressure-relief device: A rupture disc in the relief channel at the bottom of the sealed enclosure bursts under an internal arcing fault to release pressure, venting hot gas into the trench to protect operators and equipment.
Five-prevention interlocking: A complete five-prevention structure complies with safety codes — preventing mis-closing/opening of breakers, switching isolators under load, earthing in live condition, closing with earth applied, and entry into live compartments; clear status indication guides correct operation.
Intelligence
Reserved intelligent interfaces and sensor-mounting positions; once fitted with smart devices, the switchgear meets smart-grid requirements — enabling remote monitoring, fault diagnosis and condition-based maintenance to improve grid efficiency and reliability.
Why engineers specify HP-ELS-V
SF₆-Free & eco-friendly
Dry-air or nitrogen insulation removes SF₆, the most potent greenhouse gas, with no compromise on dielectric strength.
IP67 sealed enclosure
A welded stainless-steel gas tank locks out dust, moisture and corrosion, keeping insulation stable in harsh field conditions.
Five-prevention interlocking
Mechanical interlocks guard against the five classic mis-operations, making routine switching safe and predictable.
Compact modular layout
Busbar, isolation/earthing and breaker units are stacked for a small footprint and tidy, accessible cable connections.
Stable performance
An independent sealed tank maintains insulation and arc-quenching performance across the full operating range.
Low-maintenance service life
Sealed-for-life construction minimises gas handling and servicing, lowering total cost of ownership over decades.
Technical specifications
Headline ratings at a glance, followed by the full technical data sheet. Exact values are confirmed per project configuration.
| Parameter | Value |
|---|---|
| Rated voltage | 12 / 24 / 40.5 kV |
| Rated frequency | 50 Hz |
| Rated current | 630 / 1250 A (model dependent) |
| Rated short-circuit breaking current | 31.5 kA |
| Insulating medium | Dry air or nitrogen (SF₆-free) |
| Gas pressure | ≈ 0.12 MPa with dry air; ≈ 0.02 MPa slight positive pressure with nitrogen |
| Protection degree | IP67 (sealed gas tank) |
| Cabinet structure | Busbar, breaker and cable compartments; fully metal-enclosed, stainless-steel sealed enclosure |
| Interlocking | Complete five-prevention mechanical interlocking |
| Reference standards | IEC 62271-200 / GB 3906 |
Reading the model designation
Generated automatically from each product's model code.
Overall dimensions
Cabinet height, width and depth options. Selection depends on cable type and incoming / outgoing configuration.
| Item | Dimensions (mm) | Scope of application |
|---|---|---|
| Width W | 550–900 | Cabinet range (by configuration) |
| Depth D | 1000–2800 | Cabinet range (by configuration) |
| Height H | ≈2300 | Approx. cabinet height |
Where it fits
Suited to 12–40.5 kV medium-voltage distribution across utility, industrial and infrastructure projects worldwide.
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