MULTI SENTRY
SPTMSTD2T16EREN
10
The various recharge methods and the preset voltage values are defined using "UComGP".
The presence of the external temperature sensor option will activate compensation of the voltage depending on
the temperature with the battery backup voltage (272 V for 20 battery blocks).
Battery test:
during normal operation the battery is automatically tested at regular intervals. The battery test
can also be manually activated. The test is performed to ensure a limited battery discharge and impact on
overall life expectancy. If the test returns a negative result a warning is displayed on the UPS panel (or
remote panel, if installed).
Protection against slow discharges:
for long runtimes and low load discharges, the end of discharge
voltage is raised to approximately 1,8 V/el. as recommended by the battery manufacturers to avoid a
deep discharge state.
Ripple current:
recharge ripple current (residual AC component) is one of the most important causes of
poor battery reliability and reduced operating life. The UPS battery charger is a high-frequency design with
a negligible level of ripple current.
Battery recharge limit current:
The battery recharge current is limited to a prefixed value of Cnom/8 (i.e.
12,5% Cnom).
Cold-Start:
This feature allows the Inverter to be switched on and the load to be powered by the battery,
when the mains power supply is not present.
UPS without batteries:
the UPS must always be operated with the batteries connected; if they are not
connected alarms will be generated and the UPS will not be able to perform to specification.
