Connecting The Remote Maintenance Bypass; Remote Installation Diagram Of The Maintenance Bypass - Riello 100 kVA Manual

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ONNECTING THE REMOTE MAINTENANCE BYPASS
It is possible to install an additional maintenance bypass on a peripheral electrical panel, for example to allow the UPS to
be replaced without interrupting the power supply to the load.
It is essential to connect the "SERVICE BYPASS" terminal (see "Communication area, ext connection
area view") to the auxiliary contact of the SERVICE BYPASS switch. Closing the SERVICE BYPASS
switch (3) opens this auxiliary contact which informs the UPS that the maintenance bypass has been
connected. The absence of this connection can cause an interruption to load feeding and damage the
UPS.

use a cable with a 1 mm² section and double insulation for connection of the "SERVICE BYPASS" and
"SEZ_OUT" terminals to the auxiliary contacts of the remote maintenance bypass and remote output
switch isolating switches.

Check the compatibility between the "remote maintenance bypass" and the system neutral point treatment.
In the case of several machines in parallel, it is possible to use the switch out aux contact (J3) in order to
perform the hot swap of the UPS.

REMOTE INSTALLATION DIAGRAM OF THE MAINTENANCE BYPASS

Peripheral electrical panel
Connections inside the UPS
INPUT switch: isolating switch compliant with what is shown in the "Protection devices inside the UPS" section
OUTPUT switch: isolating switch compliant with what is shown in the "Protection devices inside the UPS"
section with auxiliary normally closed (leading) contact
SERVICE BYPASS switch: isolating switch compliant with what is shown in the "Protection devices inside the
UPS" section with auxiliary normally closed (leading) contact
N.B. If the UPS is to be used with the "separate" bypass input, connect the INPUT switch output (1) to this line directly.