Testing Ups-12V / 48Vdc Modules - ASCOM Ascotel 2025 System Manual

ascom Ascotel 2025/2045/2065
3.1.1

Testing UPS-12V / 48VDC Modules

Testing 230V Mains Operation
• The battery charge current – in accordance with the jumper position (see "UPS
with UPS-12V Module", Page 4.13) – should display a value of 1 or 2 A with a
tolerance of +/- 20%.
• The battery current is measured using a clip-on DC ammeter on one of the two
wires of the battery cable.
• If there is no current or the current is quite low, the PBX may have to be oper-
ated on the battery approx. 5 min. before measurement (i.e. without mains
power).
Test in Battery Operation
• Function test:
The system must continue to function uninterrupted after disconnection from
the 230V mains. This can be checked by establishing connection.
• Event message:
On the system terminal configured for this, the event message "PBX on DC
power supply" must be displayed after the predefined time.
• Current measurement:
Depending on the PBX type and level of expansion, the current in the battery
cable (current direction reversed relative to mains operation) is 2 to 15 A.
• Battery capacity:
The ratio of the battery capacity to the measured value gives an indication of
the expected bridging time in the event of mains failure. Example:
If the battery capacity is 20 Ah and the measured battery current is 5 A, the
calculated bridging time is theoretically 20 Ah / 5 A = 4 hours. In practice the
actual time is about 75% of this value, thus only about 3 hours.
6.6 Function Check HBT_20321104_06/B0_en