environment information
User’s Manual
Terminals XR2, XR3, XR4 and XR5 on the "Media Contacts 11" board of each type of unit can be used to receive signals from the operating environment and to transmit signals concerning the operating status of the UPS (see figure 16 for the position of the board, item 12).
signal reception
The signals should be provided by volt- free contacts.
■emergency off:
An NC contact causes shutdown of the inverter and the rectifier/charger, opening of the battery circuit breaker, blocking of the static bypass and activation of a relay contact on the "Media Contacts 11" board;
■battery room ventilation fault:
An NO contact causes shutdown of the rectifier/charger;
■battery circuit breaker QF1 closed: An NO contact prevents inverter
■battery temperature:
A
■"auxiliary" signals:
Depending on the selected settings, these signals may be used to provoke:
❏forced shutdown of the inverter (whatev- er the status of the bypass AC source),
❏protected shutdown of the inverter (load transfer to the bypass AC source).
❏limiting of the current drawn by the recti- fier/charger (programmable value) when supplied by an engine generator set with an insufficient power rating. The additional power required by the inverter is supplied by the battery which discharges,
❏limiting of the battery charge current (programmable value) if the normal AC source is replaced by an engine generator set with an insufficient power rating.
signal transmission
■an auxiliary 24 V power supply, isolat- ed and backed up, is used to supply:
❏ the undervoltage release of the battery circuit breaker(s) QF1,
❏ the board that measures the tempera- ture in the battery room;
■"low battery" warning signal
■"load on UPS" signal
■"load on battery power" signal (volt- free changeover contact) indicating that the inverter is supplied by the battery in the following cases:
❏ normal AC source outage or voltage drop,
❏ rectifier/charger shutdown,
❏ rectifier/charger current limiting.
This signal, which may be used to initiate process saving and shutdown procedures, is
■"maintenance position" signal (volt- free changeover contact) indicating that: ❏ maintenance bypass switch Q3BP is closed,
❏ bypass AC source input switch Q4S is open,
❏ inverter output switch Q5N is open, ❏ battery circuit breaker QF1 is open;
■signal to open battery circuit break-
er(s) QF1 in the event the "emergency off" button is pressed or to avoid an excessive battery discharge (lasting more than three times the rated backup time plus two hours);
■repo contact
■"general alarm" information
❏ internal faults,
❏ information on temperatures outside tol- erances in the battery room (optional),
❏ overload information (> In),
❏
NOTE
The maximum breaking capacity of the changeover contacts is 5A at 250V.
Environment Information | 23 |