Major functions of a Shunt Reactor are:

1. To add inductive reactance to compensate the capacitive charging current produced due to ultrahigh voltage.

2. To control over voltages at receiving end terminals due to sudden change in load condition caused due to Ferranti effect.

3. Design & Technology

3a. A qualified, experienced and dedicated design team ensures that the best design goes into manufacturing for all kinds of specifications.

3b. Many of our designers have prior experiences in the field of testing, quality control and R&D. The knowledge gained from other functions brings in a favourable mix of diverse and useful ideas to be implemented during design finalisation.

Design Analytics

Dielectric analysis

• Winding insulation
• Impulse withstand
• Oil duct stresses
• Creep stresses

Electro-magnetic analysis

• Stray losses in structures
• i2R and eddy losses in windings
• Reactance
• Tank hot-spot

Thermal analysis

• Core temperature
• Winding gradient
• Cooling
• Oil flow

Structural analysis

• Clamping structure
• Pressure withstand
• Vacuum withstand
• Seismic stability
• Transport capability

Vibrations and noise analyses

Manufacturing and Quality Control

Over 80,000 square feet shop-floor for manufacturing and assembling our reactors and transformers. Dust free, humidity and temperature con-trolled manufacturing bays. Air-conditioned winding shop with horizontal and vertical winding machines.

Semi-automated and CCTV monitored work-stations for enhanced control.

Trained and skilled work-force keep the shop running 24x7.

Quality Control

We are a quality focussed team, having implemented Six-Sigma and TQM (Total Quality Management) across the process. For monitoring the process, we have set-up IPQ cells for all functions. Detailed SOPs and checklists are followed for each process.

Incoming-quality cell inspects each and every raw material entering the shop-floor. Test report verification is mandatory for all the CTQ (Critical to Quality) materials.

In-process quality cell is responsible for inspections and tests during the manufacturing process. Manufacturing of every Shunt Reactor at CGPISL involves more than 70 mandatory in-process quality inspections. Our quality assurance team focusses on inspecting all the CTQ parameters and hold points. The jobs move to next stage only after clearing such inspections.

Testing and Commissioning

We have a well-equipped test laboratory for carrying out all the standard type and routine tests according to IEC, ANSI, BIS and other international standards. We also have a separate material test setup for carrying out critical tests on materials like Core Steel (CRGO), oil, press-board insulation, etc. Our test laboratory is ISO/IEC 17025:2005 certified by India’s NABL (National Accreditation Board for Testing and Calibration Laboratories).

The testing team is well-versed in the rules and procedures applicable to reactor testing. Re-actors are prone to high vibrations and noise, thus these tests are given special attention.

Specialised Assembly and Commissioning

A dedicated team that works to ensure safe and smooth assembly and commissioning of our reactors. We carry years of field experience of commissioning over 800 reactors across the globe.

We are skilled in conducting pre-commissioning tests ac-cording to CGPISL’s field test procedures as well as customer’s requirements.

Special care is taken for oil processing with stringent proto-cols. All parameters are met before release of charging clearance.

Advantages:

They increase the energy efficiency of the system and improve the quality of the electrical power sup-plied to consumers.

To improve the adjustment of the consumed reactive power the reactor can also have a variable rating. Such reactors are called Variable Shunt Reactors.