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RB1 Bypass & Distribution Panels

RB1 Ltd manufacture UK-built emergency mains bypass switches (EMBS), automatic and manual transfer panels, back feed protection and DC distribution panels — engineered to isolate and protect any UPS installation from 32A to 800A.

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32A – 800A bypass range
Made in the UK
Mechanical & aux contact interlocks
ATS, MTS & DC panels
— About RB1 UPS

A manufacturer we trust

RB1 Ltd are a UK manufacturer of power distribution and bypass switchgear, specialising in emergency mains bypass switches (EMBS) for UPS installations. The range spans slimline wall-mount bypass panels through to floor-standing 800A isolator cabinets, alongside automatic (ATS) and manual (MTS) transfer panels, back feed protection, N+1 and WIB splitter panels, and DC fused transition and 120VDC splitter panels for telecoms and data centres. Every panel is made to order in the UK with short lead times and configurable pole arrangements, cable sizes and interlock types.

— Range families

Browse by family

Each family is engineered for a different load and environment. Pick the one that matches your application.

32-800A

EMBS Bypass Panels

Emergency mains bypass switches (EMBS) from slimline wall-mount to floor-standing isolator cabinets, with mechanical or aux contact interlock.

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63-250A

Transfer Panels

Automatic (ATS) and break-before-make manual (MTS) transfer switches for mains/generator and dual-feed changeover.

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80-125A

Back Feed Protection

Back feed protection panels that prevent dangerous reverse feeding from the UPS output during maintenance.

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DC · 120VDC

DC Panels

DC fused transition and 120VDC splitter panels for telecoms and data centre DC distribution.

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— Why RB1

Engineered to protect

Made in the UK
RB1 panels are manufactured to order in the UK with short 4-15 day lead times across the range.
Mechanical & aux contact interlocks
Positive mechanical or auxiliary contact interlocks prevent unsafe switching and protect engineers.
Made to any configuration
2P, 3/1, 4P pole arrangements, cable sizes up to 95mm SWA and custom enclosure sizes on request.
Surge protection & Castell options
Optional SPD variants and Castell key interlocks (KS20, KBOLT, KS_UPS) for controlled maintenance access.
— RB1 Range

Explore the range

RB1 Slimline EMBS Bypass
32-63A
Maintenance Bypass Panel

RB1 Slimline EMBS Bypass

Slimline emergency mains bypass switch (EMBS) 32-63A with aux contact interlock. Compact 300×400×200 wall enclosure for rack and tower UPS.

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RB1 Compact EMBS Bypass
32-80A
Maintenance Bypass Panel

RB1 Compact EMBS Bypass

Compact EMBS bypass 32-80A with mechanical interlock. 400×500×200 enclosure accepting 25mm SWA. 2P, 3/1 and 4P configurations.

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RB1 500×500 EMBS Bypass
32-125A
Maintenance Bypass Panel

RB1 500×500 EMBS Bypass

500×500 EMBS bypass 32-125A with mechanical interlock. Accepts 35mm SWA. 1P, 2P, 3/1 and 4P configurations for single and three-phase UPS.

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RB1 Isolator EMBS (160-800A)
160-800A
Maintenance Bypass Panel

RB1 Isolator EMBS (160-800A)

High-current isolator EMBS 160-800A with aux contact interlock. Floor-standing 600×1000×300 enclosure accepting up to 95mm SWA. Surge protection variants available.

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RB1 MCB EMBS Panels
32-125A
Maintenance Bypass Panel

RB1 MCB EMBS Panels

MCB-based EMBS bypass panels 32-125A in a 500×500×200 enclosure. 1P, 3/1 and 3/3 configurations with MCB protection.

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RB1 ATS Panels
63-250A
Automatic Transfer Panel

RB1 ATS Panels

Automatic transfer switch (ATS) panels 63-250A with MCCB. 600×600×300 enclosure. 2P and 4P configurations for mains/generator changeover.

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RB1 MTS Panels
63-125A
Manual Transfer Panel

RB1 MTS Panels

Break-before-make manual transfer switch (MTS) panels 63-125A. 500×700×200 enclosure. 2P and 4P configurations for manual source selection.

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RB1 Back Feed Protection Panels
80-125A
Back Feed Protection Panel

RB1 Back Feed Protection Panels

Back feed protection panels 80-125A. Prevents reverse feeding from the UPS output to the bypass supply during maintenance.

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RB1 Dual Input EMBS Panels
32-800A
Dual Input Bypass Panel

RB1 Dual Input EMBS Panels

Dual input EMBS panels for separate or common transformer/generator supplies. Castell interlock variants available for controlled access.

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RB1 Multi Load Output / Splitter Panels
32-400A
Load Distribution Panel

RB1 Multi Load Output / Splitter Panels

EMBS panels with load output splitter for distributing protected power to multiple circuits. Slimline, compact, 500×500 and isolator variants.

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RB1 N+1 EMBS + WIB Panels
32-800A
Redundant Bypass Panel

RB1 N+1 EMBS + WIB Panels

N+1 EMBS panels with WIB splitter for parallel redundant UPS. Includes manual bypass and load distribution without bypass functionality variants.

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RB1 Rack Mount EMBS
16-63A
Rack-Mount Bypass Panel

RB1 Rack Mount EMBS

Rack-mount EMBS bypass for 19" cabinets. 16-63A. Includes rack mount range and load fed accessories for in-rack bypass and distribution.

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RB1 2P DC Fused Transition Panel
DC
DC Transition Panel

RB1 2P DC Fused Transition Panel

2-pole DC fused transition panel for connecting AC UPS DC bus to DC distribution or battery systems with integrated fuse protection.

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RB1 3P DC Fused Transition Panel
DC
DC Transition Panel

RB1 3P DC Fused Transition Panel

3-pole DC fused transition panel for three-pole DC handover between AC UPS DC bus and DC distribution with integrated fuse protection.

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RB1 2P DC 120VDC Splitter Panel
120VDC
DC Splitter Panel

RB1 2P DC 120VDC Splitter Panel

2-pole 120VDC splitter panel for distributing a 120V DC supply to multiple fused DC circuits in telecoms and data centre applications.

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RB1 3P DC 120VDC Splitter Panel
120VDC
DC Splitter Panel

RB1 3P DC 120VDC Splitter Panel

3-pole 120VDC splitter panel for distributing a 120V DC supply across multiple fused three-pole DC circuits.

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— Sectors served

Protecting critical environments

RB1 UPS protect the loads that can't go down — from data centres to hospitals and industrial plant.

— End-to-end support

Specify · Supply · Install · Maintain

We support your RB1 UPS for its entire lifecycle — from first specification to decades of maintenance.

— Questions

Frequently asked

An EMBS (Emergency Mains Bypass Switch) is a panel that allows a UPS to be electrically isolated for maintenance or removal while keeping the critical load powered directly from the mains supply, with no interruption.

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