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Pad-Mounted Ring Main Units — American Pad Mounted / Vault Switchgear
American style pad-mounted ring main units (pad-mounted switchgear / vault switchgear) provide dead-front, tamper-resistant switching and protection for underground distribution loops, built to ANSI/IEEE C57.12.28 construction with SF6 or vacuum interruption. Rated 12–38 kV, 600A continuous with loop-feed and tap configurations, suitable for public pad-mount and vault installations.
Applications
Underground residential distribution loops
Commercial and campus pad-mount applications
Vault and subsurface switching stations
Industrial and data center distribution
Key Features
- ANSI/IEEE C57.12.28 dead-front pad-mounted construction
- SF6 or vacuum load-break and fault-interrupting switches
- Loop-feed configuration with fused tap options
- 12–38 kV class, 600A continuous rating
- Submersible and vault-style configurations available
- Tamper-resistant compartmented enclosure for public access
Selection Guide
Configuration
Choose loop-feed for ring networks or radial-feed for spur feeds.
Voltage class
Select 12–38 kV to match the distribution system.
Protection
Add fused taps for transformer protection on each outgoing way.
- Frequently Asked Questions
What is pad-mounted switchgear?
Pad-mounted (or vault) switchgear is dead-front, tamper-resistant switchgear mounted at grade for underground distribution, providing loop switching and protection in public and commercial locations.
What standard applies?
ANSI/IEEE C57.12.28 covers pad-mounted equipment enclosures and compartmentalization for North American-style distribution systems.
Loop-feed or radial?
Loop-feed provides two incoming sources for ring operation and fault isolation; radial-feed is a single source spur.
Instant Selection & Quote Calculator
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| Base price (interpolation) | $2,350 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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