48
Magnum PXR accessories
MAGNUM PXR PRODUCT GUIDE
PA013006EN September 2022 www.eaton.com
4
Type 2
—
Across two circuit breakers
A
B
TR
One normal power supply and one emergency power supply.
Circuit breaker A can only be closed if B is open and vice
versa.
A
= Normal power supply
B
= Emergency power supply
A
B
0
0
1
0
0
1
Type 31
— Across three circuit breakers
A
B
TR1
C
TR2
Two normal power supplies and one emergency power
supply.
Circuit breaker A and C can only be closed if B is open. B can
only be closed when A and C are open.
A
B
C
0
0
0
1
0
0
0
1
0
0
0
1
Type 32
— Across three circuit breakers
A
B
TR1
C
TR2
The two half-busbars can be powered by a single transformer
(bus-tie closed) or by both at the same time (bus-tie open).
One or two circuit breakers out of three can be closed at the
same time.
A
B
C
0
0
0
1
0
0
0
1
0
0
0
1
1
1
0
0
1
1
1
0
1
Type 33
— Across three circuit breakers
B
C
TR1
A
Three power supplies (generators or transformers) on the
same bus bar, making operation in parallel impossible.
One or two circuit breakers out of three can be closed at the
same time.
A
B
C
0
0
0
1
0
0
0
1
0
0
0
1
Figure 62. Mechanical interlock configurations
