RMU Production Line

RMU line Overview‌
With the continuous optimization of power systems and rapid development of smart grids, user demands for shorter delivery cycles and higher quality of switchgear equipment are increasing. To enhance market competitiveness in the switchgear industry, high-volume production has become imperative3. Production line manufacturing significantly improves efficiency, stabilizes product quality, optimizes labor conditions, reduces floor space, lowers costs, shortens cycles, and ensures production balance, yielding substantial economic benefits4.

As gas-insulated switchgear (GIS) is a core product, a standardized GIS assembly line is essential to ensure quality and boost productivity. The line integrates sequential semi-automated processes: meter room assembly, gas tank assembly, primary/secondary integration, and electrical testing6.

‌I. Sheet Metal Processing Section Equipment‌

00001. ‌Laser Cutting Unit‌

High-power fiber laser cutting machine: Processes stainless steel/aluminum alloy plates with cutting accuracy of ±0.1mm23

00002. ‌CNC Bending Unit‌

Servo-electro-hydraulic hybrid press brake: Automatically forms cabinet frames with repeat positioning accuracy of ±0.05°2

00003. ‌Automatic Welding Unit‌

Dedicated stud welding machine for GIS: Equipped with inert gas protection chamber (Ar/He) meeting explosion-proof welding requirements1

‌II. Gas Tank Assembly Section Equipment‌

00001. ‌Sealing Assembly Subsystem‌

· Vacuum suction robotic arm: Installs epoxy resin insulators and seals with 99.9% qualification rate45

· SF₆/N₂ mixed gas filling machine: Closed-loop flow control with ±1% filling accuracy4

00002. ‌Leak Detection Unit‌

· Three-stage helium mass spectrometry leak detector (component→tank→complete cabinet), leakage threshold ≤10⁻⁶ Pa·m³/s4

00003. ‌Casing Treatment Equipment‌

· Sandblasting derusting machine + epoxy powder electrostatic coating line, adhesion meets GB/T 9286 Class 1 standard*^

‌III. System Integration & Testing Equipment‌

‌IV. Core Process Equipment Technical Specifications‌

· ‌Environmental Adaptability‌: Stable operation at -5~40°C with noise ≤75dB(A)*^

· ‌Energy Configuration‌:

· Total power ≤130KVA (AC 380V 3-phase + AC 220V single-phase)

· Compressed air: 0.6MPa pressure, 0.5m³/min flow rate3

· ‌Safety Protection‌:

· Infrared emergency stop devices at conveyor pinch points, compliant with GB 8196 mechanical safety standard*^

Note: Equipment selection must accommodate 1-4 unit combined cabinet types (size per design drawings), with production line layout covering approx. 94×15m.

‌Terminology Key‌:

· RGV: Rail Guided Vehicle

· SLAM: Simultaneous Localization and Mapping

· *Chinese national standards referenced where applicable

‌Assembly Line Requirements‌

‌GIS Production Line Specifications‌

00001. ‌Product Scope‌

· Configurable 1–4 unit cabinets; dimensions per design drawings

· Max. weight: 1,200 kg

00002. ‌Critical Dimensions‌

· RGV roller surface height: 400 mm (aligned with helium testing line)

· Assembly station height: 400 mm

00003. ‌Layout & Utilities‌

· Floor area: 94 m × 15 m

· Compressed air: 0.6 MPa (6 kgf/cm²), flow ≤0.5 m³/min

· Noise level: <75 dB(A) at 1 m distance46

00004. ‌Structural Requirements‌

· Conveyors must ensure stability and mechanical strength

· Pinch points require enhanced safety guards7

‌Compliance Standards‌

All products must adhere to the following mandatory standards:

· ‌Electrical Safety‌

· GB 3805: Extra-Low Voltage (ELV) Limits

· GB/T 25295: Guidelines for Electrical Equipment Safety Design

· ‌Mechanical Safety‌

· GB 8196: Design of Fixed/Movable Protective Devices

· GB 14784: Safety Specifications for Belt Conveyors

· GB 5083: General Safety Requirements for Production Equipment

· ‌Industry Regulations‌

· Basic Safety Standards for Machinery Manufacturing (2005)

· Other national compulsory standards