Description
KENJING’s eco-friendly gas insulated switchgear (KJHB-12/18/24, 630 A) is a compact ring main unit (RMU) platform for utility and industrial MV networks. Single-tank or common-tank designs integrate isolators and vacuum circuit breaker protection in IP67/IP4X sealed enclosures—engineered for safety, uptime, and fast project delivery.
Key Features
Ratings: 12, 18, 24 kV classes, 50/60 Hz, 630 A bus/circuit. Short-time 20–25 kA/4 s, peak 50/63 kA.
Dielectric: PF withstand (phase-phase/phase-earth/isolating gap) up to 42/48/65/79 kV by class; LIWV up to 75/85/125/145 kV; partial discharge ≤ 20 pC.
Sealing & Protection: IP67 gas tank / IP4X enclosure; fill pressure ≈ 0.02 MPa at 20 °C; annual leakage ≤ 0.01%.
Cabinet Options:
PT cabinet (single-tank): VT/CT metering, surge protection, copper bus, tap-off ready.
VCB cabinet (single-tank): three-position isolating grounding switch + VCB with five-interlock logic, gauge, and sight window.
VVV cabinet (common-tank): multi-feeder shared-tank layout for dense footprints.
Endurance & Losses: mechanical life up to 10,000 ops (CB), ≤ 150 µΩ loop resistance.
Automation-Ready: optional DTU for measurement, control, protection, and comms.
Layouts: side/top bus extensions; standardized two-in/two-out and two-in/four-out outdoor plans.
Typical Applications
Urban distribution kiosks, compact substations, industrial feeders, renewable tie-ins, RMU retrofits requiring reliable medium voltage switchgear with minimal footprint.
Standards & Compliance
Designed to IEC 56, 129, 137, 44-1, 255, 265-1, 62271 series, 298, 439, 694; enclosure protection to IEC 60529; corrosion protection to ISO 2063.
Ordering Checklist
Rated voltage/current and fault level.
Switch type: isolator or circuit breaker; upper/lower isolation for CB.
Insulation: semi-solid or fully solid options.
Mechanism supply and secondary wiring scope.
Copper bars, in/out bushings, and side/top extensions required.
Drawings: single-line, protection settings, and panel arrangement.
Why Choose KENJING
Reduced risk: sealed compartments and interlocked operations protect personnel and assets.
Project speed: modular bays and standard plans shorten engineering and installation.
Operational uptime: robust dielectric margins, IP67 gas tank, and DTU diagnostics.
Lifecycle value: low leakage, low resistance, and high mechanical life lower total cost.
Upgrade your network with compact, automation-ready gas insulated switchgear from KENJING. Share your single-line and fault levels—we’ll return a matched PT/VCB/VVV configuration, GA drawings, and a firm lead time.
| NO. | Item | Unit | Parameter | ||
| 1 | Rated Voltage | kV | 12 | 18 | 24 |
| 2 | Rated Frequency | Hz | 50/60 | ||
| 3 | Rated Current | A | 630 | ||
| 4 | Rated Short-Time Withstand Current | kA/s | 20/4 25/4 | ||
| 5 | Rated Peak Withstand Current | kA | 50 63 | ||
| 6 | Rated Power-Frequency Withstand Voltage(phase-to-phase, phase-to-earth/ across isolating distance) | kV | 42/48 | 50/55 | 50/65 |
| 7 | Rated Lightning Impulse Withstand Voltage(phase-to-phase, phase-to-earth/ across isolating distance) | kV | 75/85 | 88/100 | 125/145 |
| 8 | Rated Short-Circuit Breaking Current | kA | 20 25 | ||
| 9 | Rated Short-Circuit Making Current | kA | 50 63 | ||
| 10 | Partial Discharge | PC | ≤ 20 | ||
| 11 | Temperature Rise | K | ≤ 65 | ||
| 12 | Mechanical Life(isolation switch, earthing switch/ circuit-breaker) | time | 3000/10000 | ||
| 13 | Loop Resistance(Main Circuit Resistance) | μΩ | ≤ 150 | ||
| 14 | Degree of Protection(Enclosure / Gas Tank) | IP67/1P4X | |||
| 15 | Rated Filling Pressure(gauge pressure at 20°C) | MPa | 0.02 | ||
| 16 | Annual Leakage Rate | % | ≤ 0.01 | ||
