Transformer & Reactor Installation Services

Power Transformer Installation & Commissioning

Our team of Transformer Technicians have a over 60 years’ experience Installing & Commissioning Power Transformers and Reactors across the world for all the leading OEM’s within the Power Utilities Industry.
This experience makes GTR Transformers an extremely competent and safe transformer Installation & Commissioning contractor.

Complete transformer installation assembly & initial offload supervision

GTR Technicians are competent in overseeing the Transformer ooad from haulage contractor to nal positioning to the substation plinth. Analysing Impact recorder data and performing core insulation checks is a given. Positioning Anti-Vibration pads and video recording the jacking down process is all part of what we do.
Results are compared with the manufacturer data and factory test results. Common Electrical Tests are part of routine checks of transformer health and are also used to check the on-load tap changer and the condition of OLTC contacts.

Installation

Our Technicians coordinate all ancillary deliveries including safe operation of cranes/telehandlers before the assembly prechecks commence.
During the installation GTR Technicians work to strict safety instruction detailed within Method Statements and Factory assembly protocol. Risk is mitigated and reduced prior to any shift by means of site-specic RA. Site conditions within outdoor sub-stations change hourly, risk is therefore continually monitored.
Assembling cooler banks, pipework, conservators, turrets and bushings, Current Transformers, OLTC, ancillary components, kiosks and eld wiring is all part of Technicians duty. Experience brings eciencies which help our customer eld installation budgets.

Commissioning

GTR prides itself on vast and varied Sub-Station commission knowledge. Being a core business practice GTR have the latest and most sophisticated test rigs available in todays market, coupled with decades of experienced sta GTR will rigorously test and compile comprehensive test reports post installation
GTR Transformers’ Engineering knowhow provides its clients with the comfort & reassurance that its product is being handled with care by consciences Technicians.
The Oil ll element is so critical to a Transformers longevity of service that such activity is continually monitored. Our senior Technicians are competent Oil plant operators and therefore skilling to diligently supervising oil plant contractors in making sure exact factory protocol is followed.

Documentation and Reporting

  • Automated Test Reports from specialised test and commissioning equipment
  • Customized and system specific test documentation
  • Detail report on work completion with test results and further recommendations

Maintenance

The main purpose for all the above routine and maintenance tests and analysis is to detect transformer developing faults before a major failure occurs. In case of a major fault the only system that will isolate the transformer from the network and prevent from future extensive damages is the protection system. GTR specialises in testing and commissioning of protection schemes and protection relays and conducts secondary injections using specialised test equipment with dedicated transformer protection function modules. GTR also performs overall function testing to verify overall system integration, including mechanical trips from transformer protection devices.

  • Installation and refurbishment of protection relays, control devices and instrumentation in generation
  • Secondary injection test on protection relays and scheme functional checks on protection & control panels
  • Evaluation of site maintenance requirements
  • Preparation of maintenance schedules
  • Equipment specification and purchase
  • Supervision of contactors

Test Equipment

  • OMICRON CMC 256/356 – Secondary Injection of protection relays and instrumentation and Transducer Testing
  • OMICRON CPC 100 – Multifunctional Primary Test System (Current, Voltage, Micro Ohm Resistance, etc)
  • OMICRON TESTRANO 600 + TD1 – Common Electrical Tests, Static & Dynamic Dc Winding Resistance, Tap Changer, Short-circuit impedance / leakage reactance measurement, Excitation current, Capacitance & Power Factor of the windings and bushings, FRSL.
  • OMICRON CT Analyser – Protection and metering current transformers (Ratio and phase angle, CT excitation and saturation burden impedance, winding resistance, CT Polarity)
  • OMICRON FRANEO – Sweep Frequency Response Analysis (SFRA)
  • OMICRON DIRANA – Dielectric Frequency Response (DFR) – ‘Polarisation Spectrum measurement’
  • Buchholz Dry Air Pump – Buchholz relay function test
  • Hart Scientific 7380 Temperature Bath – WI temperature sensors calibration
  • PT100 Simulator – Winding temperature simulator
  • MIT515KV Megger – Winding insulation resistance test set

Oil Sample Tests

As transformer oil is contact with every internal component of a transformer it contains a great deal of diagnostic information.
GTR can assist in conducting laboratory analysis of transformer oil samples to provide an advance warning of developing fault conditions. Standard supervision and maintenance analysis include tests such as dielectric strength, water content, acidity, colour, odour and visible contaminants.