MASTER HE
SPTMHEE3T16FREN
5
The units exchange information on the operating status and the sync signals by the connections in loop with dual
redundancy. This means that even in the event of the accidental interruption of both connections, only the UPS affected
by this interruption cuts itself off, while the other one continues to operate without any interference.
The “
Hot System Expansion
”
(HSE)
feature means that a new UPS can be added to the system while the other units are
on-line and powering the load from the inverter.
The integrated UPS will configure itself automatically with the system data without any disturbance to the load.
In configurations with more than two units, to improve the normal and extraordinary maintenance operations, it is advisable
to install an external maintenance by-pass and to inhibit the UPS’s internal one.
The UPS will be equipped with terminal to connect the following auxiliary contacts:
•
External Maintenance Switch
•
External Load Output Switch
The parallel system may function with a
separate battery
or a
single battery
, that is, one battery shared by several UPSs.
In the case of loss of redundancy the system has an alarm message.
Parallel configuration up to 8 units
In parallel systems, the
“Efficiency Control System” (ECS)
function enables the UPS to be switched on and off
automatically according to load variations, while retaining the level of redundancy defined by the operator. This significantly
reduces the total energy dissipated by the system since only those UPSs required to power the connected load remain
switched on (for example during the night or at weekends).
Summary of Contents for Master HE 100 kVA
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