Service Environmental Conditions

Maximum ambient air temp. : 55 deg.C
Minimum ambient air temp. : 0 deg. C
Average ambient air temp. a period of 24 h.: over 35 deg.C
Maximum Temp. : 70 deg. C (exposed part on roof of loco)
Maximum relative humidity : 100%
Annual Rainfall  Ranging between 1750 mm & 6250 mm
Number of thunder storm days/annum 85 (max)
Number of dust storm days per annum 35 (max.)
Number of rainy days per annum 120 (max.)
Maximum basic wind pressure 200 kgf/m.sq.
Altitude Not exceeding 1000m.
Pollution level - Heavily polluted
Vibration level - As per IEC 77

Rated operating voltage : 25KV
Rated operating current : 600 A
Rated Frequency : 50 Hz
No. of  phases : one
No. of interrupter : one
Rated isolation level
Impulse withstand voltage  : 175 KV (peak)
Power frequency withstand : 75 KV (rms) (1min)
Rated short circuit breaking capacity : 250 MVA
Rated short circuit breaking current : 10 KA (rms)
Short time current : 10 KA (rms)
Rated short circuit making current : 25 KA (peak)
Operating duty :  O-3`-CO-3`-CO
Opening time : 40 ms
Closing time : 150 ms
Control system : Electro-pneumatic
Rated operating air pressure : 5.0 kg/sq.cm.
Air pressure range : 3.6 kg/cm.sq. to 11 kg/.cm.sq
Aux. Supply for magnet calve : 110 VDC
No. of auxiliary contact : 6 nos. (any combination)
Rating :

Voltage 110 VDC
Thermal current 10 ADC
Compliance to spec. IS-13118/IEC 77 and CLW/ES-27