Switchgear & Distribution

Pad-Mounted Switchgear (Ring Main Unit)

15 / 25 / 38 kV class · 200 / 600 A

Entogo pad-mounted ring main unit load-break switchgear, dead-front

Overview

Pad-mounted load-break switchgear (ring main unit) for underground medium-voltage distribution — 15/25/38 kV class, 200/600 A, dead-front, with SF6 or SF6-free fault-interrupting ways for utility loops, campuses and data centers, 60 Hz. Designed to IEC 62271-200 and ANSI C57.12.28; UL/CSA certifiable.

This pad-mounted load-break switchgear — a ring main unit (RMU) in IEC terms — is built to the North-American underground-distribution convention: a dead-front, tamper-resistant cabinet set on a pad, with 2 to 6 switch and fault-interrupter ways at 200 or 600 A for 15 / 25 / 38 kV class loops at 60 Hz. It is the form NA utilities reach for when undergrounding feeders and building campus, hospital and data-center loops.

Interruption is available with SF6 or SF6-free insulation (vacuum plus an eco-gas or solid-dielectric medium) for sealed-for-life, low-maintenance service, and the unit is distribution-automation ready with optional motor operators, sensors and a SCADA interface. Designed and built to IEC 62271-200 and ANSI C57.12.28 enclosure integrity, with UL / CSA certification available on request.

Key features

  • Pad-mounted, dead-front load-break switchgear (RMU) — the North-American underground-distribution alternative to the IEC ring main unit, with 2 to 6 switch / fault-interrupter ways.
  • SF6 or SF6-free (vacuum plus eco-gas or solid dielectric) interruption for low-maintenance, sealed-for-life operation.
  • Designed and built to IEC 62271-200 and ANSI C57.12.28 enclosure integrity, 60 Hz — UL / CSA certification available on request.
  • Tamper-resistant NEMA 3R pad-mounted enclosure, ANSI 70 green, for street-level utility and campus loops.
  • Distribution-automation ready — motor operators, sensors and SCADA interface optional.

FAQ

Common questions

Is a "ring main unit" the same as pad-mounted switchgear in North America?
They overlap. "Ring main unit (RMU)" is the IEC term; in North America the dominant product family for the same duty is pad-mounted switchgear — dead-front, 200/600 A ways, set on a pad for underground loop distribution. This unit is built to that NA convention.
Is an SF6-free version available?
Yes. The load-break and fault-interrupting functions are available with SF6 or with SF6-free insulation (vacuum interruption plus an eco-gas or solid-dielectric medium) for utilities phasing out SF6.
What ratings and standards apply?
15 / 25 / 38 kV class, 200 / 600 A, 2 – 6 ways, 12.5 – 25 kA interrupting, 60 Hz. Designed to IEC 62271-200 and ANSI C57.12.28; UL / CSA certification available on request.

Distribution

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