Site Tests

Electrical tests

(IR,PI, PD,TD,Cap, Tip up)

ARS is doing AC and DC tests for rotating machines through test equipment designed by Swiss Quartzteq brand test equipment. Results of such tests are a good way to determine faced stresses and aging of the machines.


Test scope

  1. AC and DC withstand tests
  2. Insulation resistance measurement
  3. Polarisation Index (PI)
  4. Partial discharge tests (PD)
  5. Loss factor / Tandelta Tests (TD)
  6. Capacitance tests (Cap)
  7. Tip up tests
  8. ELCID or Ring Flux (Core lamination tests)



Partial discharge on endwinding surface and its deterioration


Internal partial discharges due to voids and delaminations (the layers of mica become separated, a process known as delamination)




Vibration measurements

ARS Motor Servis experts do vibration tests through Erbessd Instruments vibration analysers. By this way all of dynamic parameters based on vibration are collected and analysed then reported



Cement mill motor vibration test


Farin mill motor vibration measurement


Hydro generator vibration test


Pump motor vibration test


Mill motor vibration test


ID Fan motor vibration measurement


Generator vibration tests


Gear box time wave form analysis

Bearings condition and deterioration are analysed through envelope spectrum analysis


Shaft alignment checks and improvements


Hydro generator site rebalance check (two planes)


Fan site rebalance (single plane)