HTXGW-12 Outdoor Intelligent (Smart) Ring Main Unit (RMU)

The HTXGW-12 Outdoor Intelligent Compact Switching Station integrates pre-assembled and pre-commissioned components such as 12/24kV switchgear, circuit breakers, load break switches, current and voltage transformers, 12/24kV potential transformers (PT), Feeder Terminal Units (FTU), Remote Terminal Units (RTU), communication and control terminals (CCU), 12/24kV metering and automatic meter reading systems, UPS power supplies, and indicator instruments into a movable, sealed, and moisture-proof stainless steel enclosure. This achieves the integration of primary and secondary systems and modular assembly in urban distribution networks, shortens the construction cycle, and greatly enhances the operational reliability of the urban power grid.

  • Fully Custom
  • Expedited Production Processing

Dimensions

Model Number and Designation Explanation HTXGW - ¨ ¨ ¨ ¨ ¨ ① ② ③ ④ ⑤ ⑥  
Outdoor Intelligent (Smart) Ring Main Unit (RMU) Number of Branch Circuits
Number of Incoming Feeders Branch Circuit Equipped with Switch
Number of Outgoing Feeders Number of Branch Circuit Switches (Can be omitted if only one switch is present)
  Main technical parameters
No. Name Unit Technical Requirement
Technical Requirement Switch-Fuse Combination Cabinet
1 Rated Voltage KV 12
2 Rated Frequency HZ 50
3 Rated Current A 630 200
4 Rated Load Breaking Current A 630 630
5 Rated Short-Time Withstand Current (RMS) KA 20
6 Rated Short-Circuit Duration S 3
7 Rated Peak Withstand Current KA 50/63
8 Closed-Loop Breaking Current A 630
9 Rated Cable Charging Breaking Current A 25
10 Rated No-Load Transformer Breaking Current A 16
11 Rated Transfer Current A 1750
12 Fuse Prospective Short-Circuit Breaking Current (RMS) KA 63
13 Earthing Switch Short-Time Withstand Current / Duration KA/S 25/1
14 Rated Current Breaking Operations times ≥200
15 Mechanical Life times ≥2000
16 SF6 Gas Annual Leakage Rate ≤1%
17 Power Frequency Withstand Voltage (1min, RMS) Across the Isolating Distance KV 48
Between Phases KV 42
Phase-to-Earth KV 42
Lightning Impulse Withstand Voltage (Peak) Across the Isolating Distance KV 85
Between Phases KV 75
Phase-to-Earth KV 75
18 Spring Operating Mechanism Manual, upgradeable to motor
19 Operating Voltage DC 48V AC 220V
20 External Insulation Creepage Distance V ≥20
21 Opening Time Difference Mm/KV <5
22 Closing Time Difference ms <5
23 Main Circuit Resistance ms <140
24 Cabinet Protection Degree μΩ IP4X
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