OPM_STS_400_25A_100_1GB_V011
26
GE DE STS: installation and operating manual 1.1 (GB)
Digital Energy
™
Static Transfer Switch
g
4.2.3 Bypassing load to secondary source
NOTE
In case of STS failure, switch to bypass of active source
Initial states of the switches are described in table 5 (figure 8). The Interlock Plate is set in NORMAL MODE
position. Bypassing the load to the secondary source is achieved by the following steps:
1. Set button “PREFERRED SOURCE” into “SECONDARY” position (button is pushed if secondary
source is preferred).
2. Check if LEDs on the control panel indicate that the secondary source is preferred, healthy and
currently supplying the load.
3. Open the door of the STS.
4. Unscrew the knurled nut that locks the Interlock Plate.
5. Set switch K4 STS PRIMARY SOURCE into “OFF” position.
6. Move the Bypass Interlock Plate into “SECONDARY BYPASS” position.
7. Set switch K2 STS SECONDARY BYPASS into “ON” position.
8. Set switch K3 STS OUTPUT into “OFF” position.
9. Set switch K5 STS SECONDARY SOURCE into “OFF” position.
10. Screw the knurled nut that locks the Interlock Plate.
After the procedure described above, the states of the switches should be as in table 6 (figure 10).
Table 6
K1 STS
PRIMARY BYPASS
OFF
K2 STS
SECONDARY BYPASS
ON
K3 STS
OUTPUT
OFF
K4 STS
PRIMARY SOURCE
OFF
K5 STS
SECONDARY SOURCE
OFF
