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ENGLISH
MASTERYS BC 15-40 kVA - Ref.: IOMMASBCXX09-EN 01
3.4-1
3-phase input/3-phase output for UPS 3/3
Key
Q1 Bypass switch
Q2 Mains power switch
Q3 Output switch
Bypass panel connection diagram
Mains
L3
L2
L1
L3
L2
L1
L1
N
N
Load
IN
UPS
N
L1
L2 L2
L3 L3
N
OUT
3. MODES OF OPERATION
Q1
Q2
Q3
3.4-2
3-phase input/1-phase output for UPS 3/1
Mains
L3
L2
L1
L3
L2
L1
Lo
N
N
Load
IN
UPS
N
Lo
N
OUT
Q3
Q1
Q2
3.4. OPERATION WITH EXTERNAL MANUAL BYPASS
The external maintenance bypass may be placed on the general distribution panel when the UPS is installed, or by installing the
bypass panel that is supplied on request.
If the UPS has an input for the auxiliary power supply the Q2 switch must be connected to this input and the main power supply
input must be disconnected on the control panel.
If the maintenance bypass is activated with the appropriate procedure the load is powered directly from the maintenance bypass,
while the UPS is separated from the power supply and can be switched off.
This operating mode can be selected for maintenance to be carried out on the system so that the necessary actions can be performed.
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