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User guide Automatic Transfer Switch • Page 15Page 14 • User guide Automatic Transfer Switch
10 Appendix
Input Voltage and Frequency Thresholds
Function Description Default setting
Acceptable input voltage range
for Source A
Source A will be power source during this range.
When input voltage of source A is beyond this range,
ATS will automatically switch to power from Source B.
180V – 258V
Return voltage point
for Source A
When input voltage of Source A is back to normal,
the ATS will switch back to Source A. (Setting Source A
as priority power source and Source B is powering)
Low point: 190V
High point: 248V
Acceptable input voltage range
for Source B
Source B will be power source during this range.
When input voltage of source B is beyond this range,
ATS will automatically switch to power from Source A.
180V – 258V
Return voltage point
for Source A
When input voltage of Source B is back to normal,
the ATS will switch back to Source B. (Setting Source B
as priority power source and Source A is powering)
Low point: 190V
High point: 248V
Acceptable input frequency
for Source A
Source A will be power source during this range.
When input frequency of source A is beyond this range,
ATS will automatically switch to power from Source B.
45Hz – 55Hz
Acceptable input frequency
for Source B
Source B will be power source during this range.
When input frequency of source B is beyond this range,
ATS will automatically switch to power from Source A.
45Hz – 55Hz
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