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A new British Post Office standard power plant has been designed to operate from a single-phase a.c. mains or standby generator input, and to provide secure d.c. power to 50 V telecommunications equipment. The plant features standby rectifier capacity, battery standby with a choice of duration, and a regulated output during battery discharge without the(More)
  • Ray Pine
  • INTELEC - 1978 International Telephone Energy…
  • 1978
Since 1960 the British Post Office has been installing standby a.c. generator sets in all but the smallest rural exchanges. As part of this program a series of packaged engine-alternator sets, complete with mechanical accessories and tanks for fuel, lubricating oil and water, have been developed. About one third of our present 3000 installed engine-sets are(More)
  • Ray Pine
  • INTELEC - 1978 International Telephone Energy…
  • 1978
In the mid 1970s the British Post Office developed a new modular d.c. power plant system as the standard source of power at -50 volts for all new telecommunications installations except those in the smallest rural exchanges. The plant employs a simple and unique form of end-cell switching. Some 500 plants have now been commissioned and there have been 2000(More)
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