Test Programme for AC coaches ELPS/TP/AC/01’JAN 94

Tests to be carried out on RMPU coaches Conditioned air leakage test Air delivery test Pre-cooling test Pull down test Spare capacity test Test for safety devices Generation test (SG AC coaches)

Tests on RMPU coaches Conditioned air leak test To be conducted after completion and cleaning of Ducts & filters. Install Return air and Fresh air filters and adjust Fresh air quantity Run both the Blowers Traverse a smoke of Agarbatti/Dhoopbatti near Evaporator chambers Canvas and main duct Fresh and return air duct Detected air escape routes to be blocked.

Tests on RMPU coaches Air delivery test Calculated from Fresh air requirements (0.7 (smoking)/0.35 (non-smoking) m3/min/passenger) Velocity measured with anemometer using hoods (FA) FA=Exhaust air (max) Conditions Voltage 130+/-1 V DC/ 415+/- 5% V AC Both side blowers running Fans OFF Readings taken after ½ hour Coach under shed FA & EA to be regulated (FA set value = EA (-10%))

Tests on RMPU coaches Pre-cooling test Conducted to record time taken for cooling the coasch without passengers, FA blocked, Light & Fans ON and temperature of AC compartment raised to 45 0C. Coach placed under shed FA intake openings blocked DB & WB temperature of Ambient taken Calculate & provide Electrical compensating load from chart Raise AC compartment temp to 45 0C by switching RMPU heaters ON in manual mode and compensating load.

Tests on RMPU coaches Pre-cooling test (contd….) Switch ON lights and fan and Run both the plants in Auto mode (Thermostat working to be ensured) In earlier built coaches time to be recorded with each High/Med/Low settings Record the timings of each RMPU Total time taken by each plant to cool the coach to lowest setting to be < 1 hour.

Tests on RMPU coaches Pull down test Conducted to see the AC plant capability to cool the fully occupied coach inextreme summer conditions. Adjust FA openings as per requirements Switch ON electrical compensating load (duly reduced @ 120 W/person present inside )and RMPU heaters in Manual mode and raise temp to 45 0C. Switch ON all light and fan Run both the plants in Auto mode Record time taken for cut-off Time taken to be < 2 hrs

Tests on RMPU coaches Spare Capacity test Test for safety devices Run both plants in Auto mode Record total OFF & ON time over a period of 1 hr Calculate % spare capacity =Total OFF time/Total time*100 Test for safety devices HP (by switching OFF condensers)/LP (by switching OFF blower) cut-outs and running compressors by bypassing condenser/AC1 interlocks Should operate within +/- 5% of set value Vane relay OHPs Thermostats

Tests on RMPU coaches Generation test (SG coaches) Commissioning test Run the alternators with the help of Dyna drive Record cut-in speeds (to be < 400 RPM) Run alternators at 800, 1500 and 2000 RPM with both RMPUs running and battery in circuit and record load being shared by each alternator (Difference not to exceed 30 Amp) Commissioning test