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AU TO M AT I C T R A N SFER S W I TC H , OT M _ C _ 2 1 D
Figure 13. Rotary switch, Ts and TBs
Figure 14. Rotary switch, OV and UV
Transfer delay Ts
The delay of transferring from the LN1 to the LN2
in automatic mode. The options are 0, 1, 2, 3, 5, 10,
15, 20, 25, and 30 seconds.
Return delay TBs
The delay of transferring from the LN2 to the LN1
in automatic mode. The options are 0, 5, 10, 20,
30, 60, 120, 300, 600, and 900 seconds.
Overvoltage threshold OV (%) and undervoltage
threshold UV (%)
The benchmarks of the OV and UV are the rated
voltage of the switch. When the voltage is higher
than the pre-set OV value or lower than the pre-
set UV value, the switch performs automatic
transfer.
The value of OV can be 5%, 10%, 15%, 20%, 25%,
and 30%.
The value of UV can be 5%, 10%, 15%, 20%, 25%,
and 30%.
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4.3 Rotary switch settings
