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MASTERYS BC 60-80 kVA - Ref.: IOMMASBCXX06-EN 06
4.2. SWITCH FUNCTIONS FOR THE 60-80 kVA RANGE
With common mains input:
• Input switch Q2:
- The input switch provides the primary power supply to the UPS.
- In normal operating conditions this should be in position 1 ON.
- The position 0 OFF will cause the batteries to discharge.
With separate mains inputs:
• Input switch Q4:
- The switch provides the power supply to the automatic bypass line.
- In normal operating conditions this should be in position 1 ON.
WARNING!
in this configuration the mains power supply to the rectifier cannot be isolated inside the UPS, only via external
protection devices.
• Output switches Q3 and Q5:
- These are used to manage UPS output.
Q3 connects the UPS output to the inverter (continuous power supply). Q5 connects the output directly to the auxiliary mains
input (manual bypass).
- Positions Q3 closed (1) and Q5 open (0): this is the position for normal operation of the UPS for a continuous power supply to
the load.
- Position MANUAL BYPASS Q3 open (0) and Q5 closed (1): this position should only be selected for standard or special main-
tenance operations (manual bypass); the load is connected directly to the auxiliary mains.
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.
Refer to the relevant procedure described below on how to activate the bypass; see chapter 6.
- Positions OFF Q3 open (0) and Q5 closed (0): this completely isolates the UPS output by removing the voltage from the appli-
cations in any operating conditions.
It is used for the emergency shutdown of the system (internal ESD).
3. ACESS TO CONTROLS
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