Control And Operation Devices; Isolators - LEGRAND VR61-18 Manuel De L'utilisateur

3.4

CONTROL AND OPERATION DEVICES

The control and operation devices of the UPS are indicated below:
➢ Isolator on rectifier input (RCB)
➢ Isolator on bypass input (SBCB)
➢ Isolator on UPS output (OCB)
➢ Manual bypass isolator (MBCB)
➢ Battery Isolator / Circuit breaker (BCB) - External, inside the battery cabinet
➢ Emergency power off button (EPO)
➢ Normal/Bypass selector
➢ Touch screen control panel
Check the personnel training
The use of the operation and control devices of the UPS is intended for authorized
personnel only. We recommend to check the training of the personnel responsible for
the use and maintenance of the system.

3.4.1 Isolators

The isolators provided on the UPS are used to isolate the power components of the device
from the AC supply line, from the storage battery and from the load.
Voltage present on terminals
The isolators do not isolate the UPS completely, since AC voltage is still present on
the UPS input terminals. Before carrying out any maintenance on the unit:
➢ Isolate the device completely by operating the external circuit breakers;
➢ Wait at least 5 minutes in order to allow the capacitors to discharge.
20 OMP06145 REV. D
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS