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UK-manufactured panel options • Practical engineering support

Automatic & Manual
Transfer Switches

The right changeover.
Specified for your power system.

ATS and MTS generator changeover panels from FW Power. Tell us what your site needs, compare suitable options and request a proposal from our team.

+44 1829 863497
FG Wilson ATI 400 automatic transfer switch panel with digital controller for standby generator changeover
FG Wilson ATI 400 automatic transfer switch panel. Configuration and availability are confirmed on enquiry.
Build your enquiry

Choose your transfer switch requirements.

Use the filters below to prepare a specification for our team. Unsure about a setting? Leave it as “Please advise”. These are enquiry preferences, with compatibility and availability reviewed before quotation.

Transfer switch requirements and contact details
More specification options

For a rating, material or arrangement not listed, add the details below. Do not choose a pole or IP rating solely from a photograph.

Explore the FG Wilson range

FG Wilson ATS panels.
Find your starting point.

Compare every CTI and ATI model in the range document, then open a dedicated product page for its technical data and options. Our team will check the selection against your load and installation.

63–3,200 A14 models · CTI & ATI
FG Wilson · 63–160 A

CTI wall-mounted panels

Four current ratings in a compact metal enclosure, with top and bottom cable entry and automatic, manual and test controls.

4 models
FG Wilson CTI 160 automatic transfer switch panel
FG Wilson CTI 160 shown in the manufacturer's range presentation. Final supplied configuration is confirmed with your quotation.

CTI 160 shown as a family example. Select a model for its dimensions and mounting arrangement.

CTI wall-mounted panels: dimensions are height × width × depth in millimetres
ModelRatingH × W × DWeightMountingExplore
FG Wilson CTI 63 63 A600 × 400 × 200 mm19 kgWall mounted View model Enquire
FG Wilson CTI 100 100 A600 × 400 × 200 mm19 kgWall mounted View model Enquire
FG Wilson CTI 125 125 A600 × 400 × 200 mm19 kgWall mounted View model Enquire
FG Wilson CTI 160 160 A600 × 400 × 200 mm19 kgWall mounted View model Enquire

IP54 is an option for this range; specify the installation environment in your enquiry.

FG Wilson · 250–1,600 A

ATI wall and floor-standing panels

Two wall-mounted models and five floor-standing models, with a two-wire generator start interface and configurable transfer controls.

7 models
FG Wilson ATI 400 automatic transfer switch panel
FG Wilson ATI 400 shown in the manufacturer's range presentation. Final supplied configuration is confirmed with your quotation.

ATI 400 shown as a family example. Select a model for its dimensions and mounting arrangement.

ATI wall and floor-standing panels: dimensions are height × width × depth in millimetres
ModelRatingH × W × DWeightMountingExplore
FG Wilson ATI 250 250 A900 × 600 × 323 mm39 kgWall mounted View model Enquire
FG Wilson ATI 400 400 A900 × 600 × 323 mm44 kgWall mounted View model Enquire
FG Wilson ATI 630 630 A1,100 × 600 × 398 mm66 kgFloor standing View model Enquire
FG Wilson ATI 800 800 A1,375 × 775 × 600 mm125 kgFloor standing View model Enquire
FG Wilson ATI 1000 1,000 A1,375 × 775 × 600 mm130 kgFloor standing View model Enquire
FG Wilson ATI 1250 1,250 A1,800 × 1,005 × 775 mm230 kgFloor standing View model Enquire
FG Wilson ATI 1600 1,600 A1,800 × 1,005 × 775 mm330 kgFloor standing View model Enquire

ATI 630: height is 1,350 mm for the top-cable-entry version. Wall mounting applies to ATI 250 and ATI 400 only.

FG Wilson · 2,000–3,200 A

ATI high-current panels

Three high-current floor-standing models from the range document, with IP54 and auxiliary contacts listed as standard.

3 models
FG Wilson ATI 3200 automatic transfer switch panel
FG Wilson ATI 3200 shown in the manufacturer's range presentation. Final supplied configuration is confirmed with your quotation.

ATI 3200 shown as a family example. Select a model for its dimensions and mounting arrangement.

ATI high-current panels: dimensions are height × width × depth in millimetres
ModelRatingH × W × DWeightMountingExplore
FG Wilson ATI 2000 2,000 A2,200 × 1,000 × 1,000 mm400 kgFloor standing View model Enquire
FG Wilson ATI 2500 2,500 A2,200 × 1,000 × 1,000 mm400 kgFloor standing View model Enquire
FG Wilson ATI 3200 3,200 A2,200 × 1,000 × 1,000 mm400 kgFloor standing View model Enquire

Current availability and final specifications for ATI 2000, ATI 2500 and ATI 3200 are confirmed on enquiry.

Dimensions are height × width × depth, excluding installation clearances. Data is from FG Wilson’s CTI/ATI range presentation; CTI 63–160 and ATI 250–1600 dimensions and weights also match its current transfer-panels page. The three larger models require current availability confirmation. Current rating alone does not determine suitability for a generator or site.

Your project

Let’s specify it properly.

Send your requirements to Adam and Murat. Include the site location, generator details and the loads you need to support. Drawings or photographs can be sent by email.

+44 1829 863497Email Adam & Murat
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Your completed enquiry opens in your email app, addressed to Adam and Murat. Review it and press Send there.

Understand the choice

ATS or MTS: which changeover suits your site?

A transfer switch selects the source supplying a load. In a typical standby installation, it changes between the utility supply and a diesel generator. Automatic and manual systems meet different operational needs.

ATS

Automatic transfer switches

An ATS combines switching equipment with controls that monitor the supplies and manage changeover. For a compatible standby generator, the control sequence can request a start, wait for a suitable generator supply and transfer the load.

It is useful where a site needs a planned response to mains failure without waiting for somebody to operate a switch. That can include unattended premises, farms, commercial buildings and industrial facilities.

Specify the required sequence, sensing, delays, alarms and generator interface. Automation must match the operating needs of the site.

MTS

Manual transfer switches

An MTS provides operator-controlled changeover between supplies. It can be a practical option where trained staff are available and the business can accept the time needed to start or connect the standby source and perform the agreed procedure.

Applications can include planned maintenance, temporary generator connections and premises with an attended backup-power plan.

Manual operation keeps the control arrangement simpler, but it relies on an appropriate operating procedure and somebody being available when required.

Compare the operating approach
ConsiderationATSMTS
ChangeoverControlled automatically when configured conditions are metInitiated by an operator
Generator startingCan request a start through a compatible control interfaceSeparate starting arrangements normally required
Site staffingSuitable for an unattended changeover sequenceRequires an available, trained operator
MaintenanceTest sensing, controls, switching and the complete sequenceCheck switching, interlocking and the operating procedure
SelectionBoth must suit the current, load duty, fault level, protection and installation environment

Continuity matters. A standard open-transition ATS is not a UPS. There is an interruption during changeover, and a generator needs time to start following a mains failure. Tell us which loads cannot tolerate an interruption.

The system, explained

How generator changeover works.

The normal and alternative supplies feed a changeover arrangement. With an open-transition system, one source is disconnected before the other is connected. Interlocking is fundamental to preventing an unintended connection between the sources.

Utility and generator supplies feed an interlocked transfer switch, which connects one source at a time to the site load. Automatic controls or a manual operator initiate the changeover.
Concept diagram for open-transition changeover. Not a wiring diagram. Protection, earthing and neutral arrangements are project-specific.

  1. Monitor the normal supply

    Automatic controls detect the configured supply conditions. Appropriate delays help avoid unnecessary changes for momentary disturbances.

  2. Establish the standby source

    The system requests a generator start where configured and checks that the alternative supply is acceptable before permitting transfer.

  3. Transfer the load

    The switching sequence separates the supplies and connects the load to the available standby source.

  4. Return when the supply is stable

    When the mains has recovered, the agreed sequence retransfers the load and allows the generator cooldown before stopping, where configured.

Exact thresholds, timings and functions depend on the equipment and commissioning settings. An MTS uses a manual operating sequence. Mains paralleling and closed-transition transfer require a separately engineered arrangement and any applicable network approval; see our synchronised generator packages.

Quality you can specify

UK-manufactured panels.
Support from TEAM FW Power.

We can discuss UK-manufactured ATS and MTS panel options as part of a standalone switchgear enquiry or a complete generator package. Our team helps turn your operating requirements into a clear supply and installation scope.

Good panel specification reaches beyond the amp rating on the label. Component selection, accessible terminations, clear identification, enclosure suitability and the supporting documentation all deserve attention.

Ask us to include the drawings, declared ratings, test documentation, operating information and agreed commissioning support you need. Manufacturer, component origin, build details and lead time are confirmed for the proposed panel.

Request a transfer switch proposal
Range of UK-made ATS enclosures with mains and generator status indicators at FW Power
Examples of automatic transfer switch panels in different enclosure sizes.
Interior of an ATS panel showing switching components, wiring and a transfer controller
Switching equipment and control interface.
Tall grey floor-standing automatic transfer switch enclosure with four status indicators
Enclosure arrangement to suit the project.
ATS panel examples with source indication lights and different front control arrangements
Source indication and operator controls.
Engineer the complete system

What goes into the right ATS or MTS specification?

These are the questions that make an enquiry useful. You do not need every answer to contact us; tell us what you know and where you need help.

01

Current and load duty

Consider the greatest current that may pass through the panel on either source, including mains operation. Check the type of load, starting demand, switching duty and any derating. A generator’s kVA rating does not automatically establish the correct switch size.

02

Phase, voltage and neutral

Confirm voltage, frequency and phase for both sources. The pole arrangement must follow the earthing and neutral design. TPN means three phase and neutral; it does not, by itself, confirm a switched-neutral design.

03

Fault level and protection

Coordinate the transfer equipment with the available fault current and protective devices. Manufacturer-declared withstand or conditional short-circuit ratings and their conditions matter. The switching amp rating is not a substitute for this check.

04

Environment and enclosure

Identify indoor or outdoor location, moisture, dust, ambient temperature and corrosion exposure. Specify the required IP protection and material for the installed arrangement, including cable entries. An IP code alone does not resolve condensation or corrosion.

05

Cables, access and space

Provide cable sizes, conductor material, numbers of conductors, entry direction and available space. Allow for termination capacity, bending radius, supports, access and maintenance. Fixing centres are important when replacing an existing panel.

06

Controls and serviceability

Agree the generator start interface, supply monitoring, transfer sequence, alarms and remote indications. If maintenance bypass or isolation is required, define that arrangement early. A bypass option does not automatically make every transfer interruption-free.

Documentation and standards. Ask for the applicable product and assembly conformity information for the quoted equipment. IEC 60947-6-1 addresses transfer switching equipment; IEC 61439-1 and IEC 61439-2 are relevant to power switchgear assemblies as applicable. The appropriate BS EN/IEC requirements and edition must be confirmed for the project. We do not infer certification from component brands or a panel photograph.

From brief to operation

Supply, integration and ongoing support.

FW Power can review a transfer switch alongside a new diesel generator, a suitable used generator, or your existing equipment. Tell us whether you need supply only, a replacement panel or a wider installation proposal.

Agree responsibilities for the electrical design, installation, protection settings, testing and handover before work begins. Our installation and commissioning service can be discussed as part of the project scope.

Functional testing should cover the agreed failure and restoration sequence, alarms and interaction with the generator. Continue to inspect and exercise the system under a planned generator maintenance programme, following the equipment instructions.

Have a drawing or an existing panel?

Email your single-line diagram, nameplate photographs or specification. Useful details include:

  • Site address and intended use.
  • Generator make, model, rating and controller.
  • Supply details and the loads to be supported.
  • Space, cable and environmental constraints.
  • Quantity, required delivery date and installation scope.
Email your project requirements

Also looking for fuel tanks or circuit breakers? View ancillary equipment in used stock or include it in your enquiry.

Transfer switch questions

Clear answers.
Better specifications.

Read our automatic transfer switch guide for more background, or speak to the team about your application.

What is the difference between an ATS and an MTS?

An automatic transfer switch uses controls to change between supplies when the agreed conditions are met. A manual transfer switch needs an operator to make the changeover. Both require a suitable switching arrangement for the installation. Choose around the acceptable interruption, staff availability and operating plan, as well as cost.

Does an ATS provide uninterrupted power?

An ordinary open-transition ATS does not. It disconnects one source before connecting the other, and a standby generator also needs time to start and establish a suitable supply after a mains failure. Loads that cannot tolerate that interruption may need a UPS or a separately engineered continuity solution.

What size transfer switch do I need for my generator?

Start with the maximum current through the switch in both mains and generator operation, supply voltage and phase, and the load characteristics. Then check the utilisation duty, ambient conditions, fault level, protection coordination and cable terminations. Generator kVA alone is not enough to select a panel.

Do I need a 3-pole or 4-pole transfer switch?

The neutral and earthing design determines whether the neutral needs to be switched. Three-phase equipment may use different arrangements, and TPN describes a three-phase-and-neutral supply rather than proving that the neutral is switched. Have the proposed pole arrangement checked against the complete installation.

Can I fit an ATS to an existing diesel generator?

Potentially. FW Power can review the generator controller, remote-start interface, voltage, frequency, protection and existing installation. Send the generator model and controller details with your enquiry. A motorised changeover switch on its own is not necessarily a complete automatic transfer system.

Can a manual changeover switch be used with a temporary generator?

Yes, where the complete installation is designed for that purpose. The inlet or connection arrangement, source separation, earthing, protection and operating procedure all need review. An MTS alone does not provide automatic generator starting or automatic fault response.

Are UK-manufactured transfer switch panels available?

FW Power can discuss UK-manufactured ATS and MTS panel options. The build specification, switching components, enclosure, controls, documentation and lead time are confirmed for the proposed package. Photographs show examples of ATS panels; they do not establish the specification or availability of every option in the selector.

Can you quote for a bespoke ATS or MTS panel?

Yes. Include your single-line diagram if available, load current, supply arrangement, installation environment, cable details, space constraints and required functions. Tell us about any bypass, remote indication or special project requirements so our team can review the scope before quotation.

Let’s get the changeover right

Tell us what you need to power.

Compare ATS and MTS options with a team that understands the generator as well as the switchgear.

Build your enquiryCall +44 1829 863497Email Adam & Murat

Let’s put your power in place.

Tell us what you need to power. We’ll help you find the right solution.

Talk to our team