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.
 
 
 
 
 
 
Latest News
EXPEL PROSYS  AWARDED  “BEST SALES PERFORMANCE AWARD” ACROSS INDIA FOR THE YEAR 2014 FROM SIEMENS ENERGY AUTOMATION GROUP.