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ENGLISH
MASTERYS BC 15-40 kVA - Ref.: IOMMASBCXX09-EN 01
4. ACESS TO CONTROLS
4.2. SWITCH FUNCTIONS
Input switch Q2
The input switch provides the primary power supply to the UPS.
In normal operating conditions it should be in position 1 ON.
The position 0 OFF will cause the batteries to discharge.
In a configuration with separate mains the switch only interrupts the rectifier power supply.
Output disconnecting switch Q6
The disconnecting switch Q6 has three positions with the following functions:
• Position 1 UPS: this is the position for normal UPS operation for a continuous power supply to the load;
• Position 2 MANUAL BYPASS: This position should only be selected for standard or special maintenance operations (manual
bypass); the load is connected directly to the mains power supply. It may be used in the event of a UPS failure to power applications
from the auxiliary mains while awaiting the intervention of technical personnel;
• Position 0 OFF: This completely isolates the UPS output by removing the voltage from the applications in any operating conditions.
It is used for the emergency shutdown of the system (internal ESD).
Battery switch Q1 (UPS batteries)
When closed, this switch connects the UPS batteries to the DC/DC converter stage to power the inverter in the event of a mains
failure. The normal operating position is 1 (closed).
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