Catalogue · ROCKWILL

RMR-33...35...40.5 G3 Ring Main Unit

ROCKWILL RMR gas-insulated switchgear: 33/35/40.5kV, 630-1250A, lightning impulse 170-250kV, short-time 20-25kA, making current 50-63kA peak.

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Updated2026.09

LanguageEnglish

FilePDF · 4.2 MB

Ring Main UnitEco-friendly Gas Insulated Ring Main Unit

Document description

ROCKWILL RMR complies with IEC 62271‑1、IEC 62271‑100、IEC 62271‑102、IEC 60265‑1、IEC 62271‑105. It adopts eco‑friendly G3 gas insulation, modular unit‑type design, supports on‑site expansion without gas‑handling, three‑position switch, full‑welded stainless‑steel tank and complete mechanical interlocks.

Frequently asked questions

Can RMR be expanded on‑site? What are the prerequisites?

Yes, on‑site expansion is available. No gas‑handling, no special tools or foundation modification are required. Limitation: total main‑busbar current shall not exceed 630 A (40℃) after expansion.

What functional modules are available for RMR?

Multiple modular units are optional: C‑unit load break switch, V‑unit circuit breaker, F‑unit switch‑fuse combination, M‑unit metering module, D‑unit direct cable connection, PT voltage‑transformer module for flexible cabinet combinations.

What safety features does the RMR three‑position switch provide?

The integrated three‑position switch has closed / open / earthed stable positions, mechanical interlocks prevent mis‑operation. It has passed 20 kA/1 s internal arcing test and is equipped with pressure‑relief channels.

RMR-33...35...40.5 G3 Ring Main Unit

Document description

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