Services

Relay services
  • The services offered by us with dedicated efforts is of utmost importance, would benefit the Industries to shape the Power Development and Power Management.
  • The professional strength of our Executive Members with the co-operation extended by our Clientele will lead us to meet the challenges of new era.
  • It is our goal to do everything right the first time, every time. It is also our pledge to respond to our customers' confidence in achieving their complete satisfaction.

Electromechanical & static relays :

  • Inspection, servicing, testing and calibration of protective and auxiliary relays including minor repairs.
  • Physical inspection, cleaning of relays, wiring check and tightness of connections. Free movement of rotating parts, mechanically / electrically operated flags and contacts. Checks on trip isolating contacts, shorting of plug bridges.
  • Insulation resistance test.
  • Checking of electrical operation indicators, internal auxiliary elements, DC auxiliary and master trip relays for pick-up and drop-off values and drain current in case of Static, Microprocessor and Numerical relays including resistance of coil.
  • Secondary injection tests on IDMTL – current – volt relay, instantaneous current volt relay, time delay relay, motor protection relay, differential relay and all other relay as per IS and manufacturers tests recommendation and commissioning manuals.

Numerical relays :

  • Visual inspection for any damage to relay.
  • Visual inspection of wiring and tightness of connections.
  • Visual inspection of PCB cards for any dry solder or abnormality.
  • Cleaning of relay body for proper insulation level.
  • Insulation resistance measurement between all terminal and body and between various circuits.
  • Checking for proper operation.
  • Measurement of Drain current (mA)
  • Checking for electrical LED indicator.
  • Checking of Binary Input / output, signaling relay, command relay and LED programming in case of 7SJ600 / 7RW600 relay.
  • Checking of Relay Settings values for proper operation of relay.
  • Checking of relay characteristics as per IS and manufacturers tests recommendation and commissioning manuals.

Power and protection system studies :

  • System study of plant distribution for adequate protection and perfection.
  • Fault level calculation and short circuit studies.
  • Protection relay co-ordination studies for grading of overcurrent and earthfault relays and unit protection relay settings for motor, transformer and generator.

The Power System Studies shall be carried out by the latest release of ETAP (Electrical Transiant Analyser Program) modules developed by OTI-USA and KLG system Ltd., which is extremely versatile for solving majority of Power System Analysis Problems.

Protection system refurbishing :

  • Restricted Earth Fault ( REF ) protection scheme for transformer.
  • Transformer and generator differential protection scheme.
  • Busbar differential protection scheme.
  • Pilot wire protection scheme for feeders.
  • Synchronising scheme for parallel operation of generator with Grid.
  • Load Shedding Schemes for Grid islanding.
  • Modernisation and retrofitting of ageing protective relays.
  • Modification of H.T. Panel having time limit shunt fuse into protective relays.
  • To achieve proper grading of overcurrent relays and to avoid frequent mal-operation problems if any.
  • It also comments on the installed overcurrent and earth fault relays for various protection applications and suggest correct protective relay for particular application.
Design and detail engineering of protective relaying schemes
  • Restricted Earth Fault (REF) protection scheme for Transformers.
  • Transformer and Generator Differential Protection schemes.
  • Busbar Differential Protection.
  • Protective Relaying Scheme for Generator as well as for parallel operation of Generator with Grid or parallel operation of Generators.
  • Load Shedding Schemes for prevention of the collapse of in-plant generation under overload condition.
  • Relay Co-ordination & System Study
  • 66KV Switchyard Design & Engineering.
  • Relay Training

Design and detail engineering of protective relaying schemes :

  • Restricted Earth Fault (REF) protection scheme for Transformers.
  • Transformer and Generator Differential Protection schemes.
  • Busbar Differential Protection.
  • Protective Relaying Scheme for Generator as well as for parallel operation of Generator with Grid or parallel operation of Generators.
  • Load Shedding Schemes for prevention of the collapse of in-plant generation under overload condition.

Conultancy :

  • Basic design and detail engineering for Electrical Power Distribution System.
  • Preparation of technical specifications for capital intensive items.
  • Relay Training
  • Invitation of bids and techno-commercial analysis.
  • Preparation of lay-out drawings, inter-connection drawings, single line diagram, earthing and lighting layouts, cable schedule and lay-out, control and protection schematics.
  • Stage and final inspection of electrical equipment for meeting guaranteed technical performance.

Protection system study :

  • Study of existing protection system of plant with suggestions and renovations for plant betterment for optimum selection of protective relays.
  • Execution on turnkey basis for renovation and revamping switchgears, protective relays and Protective schemes based on comments of the Protection System Study Report.

Fault level calculations and short circuit studies :

  • For verification of authenticity of existing switchgear ratings as per the system operating conditions of the plant.
  • Fault level calculations can form a guideline for feasibility of existing switchgear for further expansion programmes.

Conultancy :

  • Testing, Servicing & Calibration of Protective Relays.
  • Programming & Parameterization of Numerical Relays.
  • Testing & Commissioning fo MV/LV Panels.
  • Testing & Commissioning of Switchyards upto 220KV.
  • Testing & Commissioning of EHV Breaker upto 220KV.
  • Testing of REF,Differential & Directional Schemes.
  • Testing of Auto Change Over Scheme.
  • Testing & Commissioning of Power & Distribution TR's.
  • Testing of HV Cables upto 66KV.

Testing & commissioning electrical power system :

Outdoor switchyard : Pre-commissioning tests for outdoor switchyard equipments (complete package) like power and distribution transformer, circuit breaker, CT-PT-NGR-NGT, lightning arrestor, insulator, isolator, earthing installations, relay and control panels, HT busduct and cables and other electrical equipment as per the design and requirement of system.

Distribution system : Pre-commissioning tests for electrical distribution system like HT Switchgears, LT Switchgear, Motor Control Centres, Distribution Transformer, HT/LT busduct, HT cable, HT/LT Motor, Battery, Battery Charger and other electrical equipment like TCE / DCL / MNDASTUR / KIRLOSKAR / UDHE / PDIL / EIL.

Captive power plant : Pre-commissioning tests of turbo-generator set alongwith auxiliaries (complete Package ) like generator, generator transformer, busduct with CT-PT-NGR-NGT, relay and control panels and other electrical equipments as per the design and specification for consultants like TCE/DCL /DESIN and other reputed consultants in the field of Power Generation.

Conultancy :

  • Relay Retrofitting - Electromechanical to Numerical.
  • Relay Reparing - Repair, Service & Calibration.
  • MV / LV / HV Breaker Retrofitting.

Relay repairing

Well established SERVICE CENTRE of having full fledged testing equipment facility, expert man power and large stock of recommended proprietary spare parts to undertake repairing and calibration of general auxiliary and special relays.

Conultancy :

  • Health Check-up of MV/LV Switchgear.
  • Health Check-up of MV/LV Panels.
  • Switchyard Maintenance.

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