Gap Filler Detail
1960 – National Archives of Canada
949-5
MEMORANDUM
19 Dec 60
A/CCE
Design Criteria - Power Equipment
Gap Filler Radar Stations - General
The selection of power generating equipment & the connection of the power source to the radar equipment should meet the following requirements:
Extracted Page 5 Specifications MIL R-27090 USAF
- Power supply voltage: 108 to 133 volts (measured from center point of wye to each leg) and 186 to 230 volts (measured from each leg to every other leg).
- Phase: 3 phase
- Power supply frequency: 60 cycles per second (spc) plus or minus 2 cps.
- Waveform: The deviation factor of the power line (voltage characteristic) shall not exceed 10 percent.
- Harmonic content: 5 percent or less
- Duty: The load presented by the radar set to the 3 phase source shall be distributed so that no normal conditions shall cause more than 15 percent load unbalance between any 2 phases.
The foregoing is additional information to that provided in our memo even file date 30 Nov 60, paras 3 & 4.
(SS Whetstone) S/L
TSC3-3
6-8631