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Digital Energy
Static Transfer Switch
3.5
Connection
1.
Switch off the supply in both supplying lines outside the STS. Switches for both sources may be
placed in some distance to the STS depending on the topology of the rest of the power system.
2.
Check the absence of the voltage in the two input lines with a proper voltmeter.
3.
Open the door of the STS.
4.
Set the switches into positions as in table 2.
5.
Unscrew 4 screws (figure 3) from the lowest panel and take the panel out.
6.
Firmly connect five wires coming from the first supplying device (PRIMARY SOURCE) into the
X01 PRIMARY SOURCE terminal (figure 4).
7.
Firmly connect five wires coming from the second supplying device (SECONDARY SOURCE) into
the X02 SECONDARY SOURCE terminal (figure 4).
8.
Firmly connect the five wires going to the load (STS OUTPUT) into the X03 STS OUTPUT
terminal (figure 4).
9.
Check the connection of three external lines. Especially the output line going to the load should be
connected to the right terminal in the STS.
10. Check if L1, L2 and L3 of each source are connected to right terminal.
11. Put the front panel of the lower board back in place and fasten it with screws.
12. Switch on the supply for the two input sources. The STS is ready to start up.
OPM_STS_400_25A_100_1GB_V011
Table 2
K1 STS
PRIMARY BYPASS
K2 STS
SECONDARY BYPASS
K3 STS
OUTPUT
K4 STS
PRIMARY SOURCE
K5 STS
SECONDARY SOURCE
19
OFF
OFF
OFF
OFF
OFF
GE DE STS: installation and operating manual 1.1 (GB)
g
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