Generator

Generator services Hereford Herefordshire and nation wide, Arnold Engineering install and maintain generators in a variety of industries.

We have experience in design, installation and maintenance of generators to many industries, to name a few: financial institutions, data centres, hotels, Poultry Farms, Dairy Farms, residential and office buildings.

We can design, build and install electrical control panels according to the requirements of the project. We can supply and install control panels for new generator sets and offer upgrades for existing generators already commissioned on site. Once installed we offer end user training to ensure your team can function the control panel correctly.

After Care

We can provide full planned preventive scheduled maintenance to all aspects of your generators design, from full engine servicing to all electrical and mechanical aspects.

Generator servicing and maintenance work is essential for any type of generator. We recommend that generators and UPS systems are serviced at least twice a year, to ensure the customer’s disaster recovery plan is fit for purpose and that if needed, the standby generator and UPS system can withstand the customer’s power requirements when a failure occurs.

Our engineers will visit site and undertake an inspection as part of the recommended service plan. After each generator service we will provide the customer with a service report, which will state the work carried out and whether any potential faults were identified during the service.

If requested, we will carry out maintenance work and generator repairs required to ensure the generator and UPS system pass the necessary health and safety regulations and are fit for purpose when needed for an emergency.

Based in Hereford already providing Generator Engineers in to Herefordshires Industrial scene, we Service the UK and globally for all aspects of Generator repair works, including design, installation, testing and emergency fault finding response, right from are base in Hereford. We can also provide solutions to protect your Generator from harm

FIELD REPAIRS

In the event of an unplanned outage, the quickest way to return the generator to service is to repair on site.
To arrange an immediate onsite repair please contact us, or in emergency contact Service 24.

FACTORY REPAIRS

Where local conditions prevent repair, Arnold offers a factory repair programme. With skilled engineers and specialist technical equipment on hand, repairs and overhauls can be carried out quickly with a rigorous testing regime to align to orignal exacting tolerances.

Typical repair services include:

Generator and motor inspection, refurbishment and testing
Stator rewind
Bearing inspection replacement or refurbishment
Rotor overhaul and end winding refurbishment
Rotor-end cap/retaining rings inspection and NDT testing
Rotor rewind
Rotor high speed balancing including over speed
High voltage testing

Rotor Balancing

Arnold offers expert and technologically advanced rotor balancing.

Low cost rotor balancing
Expertise in designing, manufacturing & servicing rotors
Investment in the very latest rotor balance technology
Urgent 24 hour turnaround capability to minimise downtime

For every aspect of generator maintenance, our service is as thorough and well thought through as our approach. And we like to think our standard services are anything but standard, as they’re carried out with such precision and expertise. Services include:

Inspections, electrical and mechanical testing
Coil replacement
Complete rewind
EL-CID, loop test and end winding stiffness (“Bump”) testing and analysis
Patented end winding vibration services
Vibration monitoring
Full or partial re-wedge

End Winding Vibration Resolution Services

Vibration Monitoring Systems

Stator winding vibration monitoring systems provide information on both electrically and mechanically inducted vibrations being experienced on the end windings. Depending on your set up, the systems can be configured to provide information at the generator itself or via continuous monitoring in the control room.

From Straight Forward Repairs To Performance Enhancements

Our engineers are experienced in the design, manufacture, maintenance and testing of brushless exciters and they can re-engineer components to improve performance. If you’re due an upgrade, we can now supply new brushless exciters to our clients too. Our services include:

Repairs
Rebuilding components
Refurbishment program to disassemble all removable components, testing each electrical component to identify its status
Component replacement
Re-banding services
Complete rewinds of the stator and rotor winding assemblies
PMG rewinds
Full speed balance of all exciter rotors in a state-of-the-art balance facility
Emergency excitation services including:
- Swap-out brushless exciters for use during refurbishments
Electrical testing, including:
- RTD Resistance Test
- RTD Insulation Resistance
- Thermocouple Continuity
Supply of new brushless exciters
Exciter Housing Modifications

Housing Modifications Reduce Risks And Improve Operation

BRUSH Service can carry out a Positive Pressure Vent Modification (PPVM) to your existing exciter housing which has been proven to significantly reduce the rate of dirt contamination and mitigate the potential hazard of hydrogen ingress.
Housings are modified so the inside pressure is at a higher level than the outside, which reduces the intake of dirt and contamination during operation.

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Electrical

Thermography Analysis