 |
The most common telecoms installation of an Advance UPS is at or around 1500VA.
The recommendations quoted here apply to this case and can be extrapolated for all installations. If you need any help please ring service on 01978 821 086.
All units use the standard RS232 protocol. Without special equipment the cable length can run up to 200m. With special equipment (RS232 signal repeaters) this can be infinitely extended but it normally works out cheaper to use modems and a phone line. Volt free contact cable runs of 200m are also possible
If the input cable to a UPS is properly sized distances of 50m will lead to approximately a three volt drop in supply voltage. Greater distances can be achieved by thicker cable and extreme distances can be achieved by stepping the voltage up to a suitable level for long distance transmission and then stepping it down again at the UPS input.
Supplied cables for connection to battery extension packs are 1.5m. Longer lengths are available on request. Lengths longer than 2.5m will lead to a decreased run time from the batteries due to volt drops in the cable.
The output of the UPS can effectively be treated as a new source of mains voltage so a further 50m can be gained if the load will accept the three volt drop. Greater distances as above. The cable should be mineral insulated 3-core with shield for optimal resistance to mains borne Radio Frequency Interference (RFI).
| |
|
|