KENJING XGN15 SF6 Ring Main Unit (RMU) – Medium-Voltage Gas-Insulated Switchgear

Description

KENJING XGN15 is a compact, modular SF6 ring main unit for 12/18/24 kV distribution networks. It integrates three-position load break switch, vacuum circuit breaker options, five-point mechanical interlocks, IP-rated enclosures, and DTU-ready automation for safe, maintainable ring or radial feeders.

Key Features and Advantages

• Wide MV ratings, high dielectric strength
  12/18/24 kV systems, 630 A busbar. Power-frequency withstand up to 65 kV and lightning impulse up to 145 kV across open contacts, supporting long creepage and compact clearances.

• Fault duty and thermal capability
  Short-time withstand 20/4 or 25/4 kA/s; peak making 50/63 kA. Rated transfer/breaking options per module (C/F/V) cover feeder, transformer, and sectionalizing duties.

• Three-position switching & full interlocking
  Close-Open-Earth LBS in epoxy resin, with status indication, pressure gauge, and observation window. Five interlocks coordinate isolator/earthing/CB/lower door to prevent mis-operations.

• Configurable primary schemes
  PT (metering/power tapping) units, incoming/outgoing feeder units, load switch + fuse (F), vacuum circuit breaker (V), and combined CFV common-tank layouts. Side/top bus extensions allow two-in/two-out or two-in/four-out RMU bays.

• Sealed, compact construction
  Gas compartment uses SF6 with robotic welds and explosion-relief device. Cabinet widths from 325–750 mm; IP protection (typ. IP2X cabinet, IP67 bushings) supports harsh sites.

• Lifecycle and diagnostics
  Mechanical life up to 10,000 ops (CB) / 3,000 ops (isolation & earthing). Partial discharge ≤ 65 pC; main circuit resistance ≤ 150 µΩ. Optional DTU enables digital measurement, control, protection, and SCADA communication.

• Installation-friendly
  Front access cable chamber with removable covers, single/three-core terminations, CTs/LA ready. Clear foundation drawings and standardized secondary wiring harnesses simplify build.

Typical Applications

Urban RMUs, compact substations, industrial plants, renewable interconnects, and underground cable networks requiring high reliability, low maintenance, and safe isolation.

Compliance

Meets IEC 62271 series (AC HV switchgear, circuit-breakers, isolators, bushings), IEC 60529 (IP), and SF6 handling/acceptance specifications. Normal environment: –15 °C to +40 °C, RH daily avg ≤ 95%, altitude ≤ 1000 m (consult KENJING for special conditions).

Ordering Information (what to specify)

1. Rated voltage/current and short-circuit ratings.

2. Unit type(s): PT, C (LBS), F (LBS + fuse), V (VCB), or CFV common-tank combinations.

3. Isolation arrangement (upper/lower), side/top extensions, number of feeders.

4. Operating power supply, secondary wiring and protection scheme.

5. Conductive copper bars, incoming/outgoing bushings, and any special interlocks or accessories.

Why Choose KENJING

• Proven MV engineering with standardized, interchangeable modules and robotic-welded gas tanks.

• Safety by design: complete interlocking logic, explosion-relief, clear mimic/indications.

• Lower total cost: compact footprints, minimal maintenance, fast installation and expansion.

Plan your RMU lineup with our applications team. Send your single-line and fault-level data, and KENJING will configure a compliant gas-insulated switchgear bay list and BOM for your site.