OPM_STS_230_25A_2RM_1GB_V012
9
GE DE STS: installation and operating manual 1.2 (GB)
Digital Energy
™
Static Transfer Switch
g
Figure 2. Positions of Integrated Switch
Depending on Integrated Switch position, each of the switches K1, K2, K3, K4 and K5 is either closed (“ON”) or
opened (“OFF”) as in table 1.
Integrated switch position
Switch state
K1 K2 K3
K4 K5
No
PRIMARY
BYPASS
SECONDARY
BYPASS
STS
OUTPUT
PRIMARY
SOURCE
SECONDARY
SOURCE
NORMAL
0 OFF
OFF
ON
ON
ON
PRIMARY BYPASS
1
ON OFF ON ON OFF
PRIMARY BYPASS
STS ISOLATED
2 ON
OFF
OFF OFF
OFF
SECONDARY
BYPASS
1 OFF
ON
ON
OFF
ON
SECONDARY
BYPASS
STS ISOLATED
2 OFF
ON
OFF
OFF
OFF
Table 1
In the normal mode of operation, the process of transferring the supply from one input to the other one is
performed automatically. The start up procedure is described in chapter 3. Operation is explained in chapter 4.
0
1
2
1
2
NORMAL
SECONDARY
BYPASS
SECONDARY
BYPASS
STS ISOLATED
PRIMARY
BYPASS
PRIMARY
BYPASS
STS ISOLATED
