Power Delivery Substation Tester

Transport for London; Greater London; On-site; GBP 67,000 - 70,000; Full time

Job summary

London Underground invites applications for the Power Delivery Substation Tester. Based in London, the role covers servicing and fault attendance of HV/LV plant, ensuring safe and continuous power supply across the Underground network.

The job requires interpreting technical drawings, holding a full UK driving licence, and experience with electrical test equipment; shift patterns rotate days and nights with potential uplift when moving to shift work.

Qualifications

• Electrical engineering qualification (City and Guilds/ONC) or equivalent.
• Holding a valid Full UK driving licence is essential.
• Experience with electrical test equipment to assess plant condition.

Responsibilities

• Fault finding and first‑line fault repair of HV (22kV and 11kV) and associated equipment.
• Isolation and earthing of substation plant and safety documentation management.
• Servicing, calibration checks and inspections of DC switchgear and frequency changers.
• Maintenance and repair of batteries and charging equipment; assemble battery systems.
• Work on live AC and DC apparatus up to 1 kV following Safety Procedures.

Skills

Interpret technical drawings

Full UK driving licence

Education

Electrical engineering qualification

Job description

Power Delivery Substation Tester

Grade – P3A1

Salary- £67,370.00- £70,428.00

Location – Tufnell Park, N19 (prepared to travel all over the London Underground system and its supply distribution network)

Contract Type – -Permanent- London Underground

Shift Pattern: 2 weeks of days and 1 week of nights on rotation. There is an option once qualified to move to shift work with a salary uplift to reflect.

Overview of project/role

London Underground would like to offer you the opportunity to join our inclusive and diverse workforce; proudly reflecting the city that we serve.

London Underground has the largest private electrical distribution network in the country requiring multi-disciplined technical staff to maintain the infrastructure. We have an opportunity in the field of Power Distribution for a Substation Tester.

You will be responsible for undertaking, servicing and first-line fault attendance and repair of all plant and equipment under the control of Power Delivery.

You will ensure that the assets are serviced in accordance with set specifications to meet safety and operational criteria in order to provide an efficient and continuous power supply to the London Underground railway system.

Key Accountabilities

• Fault finding and first line fault repair of HV (22kV and 11kV) Switchgear, DC Traction Switchgear, Transformers and Rectifiers, LV Switchgear, Signal Contactors, Frequency Changers and Rotary Convertors, Battery Chargers and Battery Systems and Compressed Air Equipment.
• Isolation and Earthing of Substation Plant and the issue and cancellation of associated Safety Documentation, including overall responsibility for application of Safe Systems of Work.
• Servicing (clean, inspect, calibration checks in accordance with Work Instruction(s) and associated check sheets & report) of DC switchgear and frequency changers.
• Maintenance, fault finding and repair of substation/station batteries and associated charging equipment. Assembly of battery systems and connection of hospital sets.
• Undertake work on live AC and DC apparatus, conductors or equipment up to 1kV whilst conforming to Power Delivery Live Work Procedures.
• Assist Fitting Teams while on standby duties.
• Use meters and instruments (e.g. Multi-Meters, Insulation Resistance (Megger) Test Sets, HV Switchgear Profiler, DC Traction Meters, Battery Impedance Test Equipment, UltraTEV Devices, IR Detectors and Humidity Meters) decipher results and record readings.
• Drive vehicles, clean them and carry out vehicle checks as required
• Operate communication / data transmission and display equipment.
• Operate mechanical aids and use portable equipment.
• Take substations/switch houses etc onto local/manual control.
• Undertake regular inspections of plant and site conditions; monitor and log plant instrumentation and record and report any defects/abnormalities.
• Ensure that the work of staff acting under your control is carried out in accordance with Safety instructions.
• Undertaking Point of Work Risk Assessments and implementing suitable control measures to maintain site safety.
• Act as Site Person in Charge as required.
• Prepare defect reports.

Skills, Knowledge & Experience

Skills

• Ability to interpret, understand and apply technical drawings (Essential)
• Hold a valid Full UK driving Licence (Essential)

Knowledge

• Electrical Engineering Qualification (City and Guilds/ONC) or equivalent (Essential)
• Proficient in the use of electrical test equipment used to determine the condition of plant and equipment (Essential)
• Demonstrate theoretical electrical knowledge of batteries, chargers and supplies, standby power supplies and three phase AC electrical supplies, transformer principles, AC & DC switchgear operation, the fundamentals of circuit protection and earthing arrangements. (Desirable)

Experience

• Recognised electrical apprenticeship (Essential)
• Relevant electrical power experience (Fitting skills) (Essential)
• Experience working with electrical test equipment to determine the condition of plant or equipment. (Essential)
• Experience isolating and earthing HV plant (Senior Authorised Person or Authorised Person or equivalent) (Desirable)
• Experience working to HV/LV rules in a Power Distribution system (Desirable)
• Experience of electro-mechanical systems