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4. Operation

4.3.6.2.5 Bypass Settings

Bypass Volt Prot Lower Limit (%): When the difference between the bypass voltage and the rated voltage exceeds the lower
threshold for the bypass voltage, the system determines that the bypass voltage is abnormal and that bypass is unavailable.
The value can be -10%, -15%, -20%, -30% or -40%. The default value is -40%.
Bypass Volt Prot Limit (%): When the difference between the bypass voltage and the rated voltage exceeds the upper
threshold for the bypass voltage, the system determines that the bypass voltage is not normal and that bypass is unavailable.
Notes:
• When the voltage level is 120V, the value range is 10%, 15%, 20%, and 40% (default).
• When the voltage level is 127 V, the value range is 10%, 15%, and 20% (default).
Bypass Freq Tracking Range (%): When the difference between the bypass input frequency and the rated frequency is
greater than this value, the system determines that the bypass frequency is not normal and that the bypass is unavailable. The
value range is 1%, 2%, 4%, 5% (default), 10%.
Bypass Rate Tracking Rate (Hz/s): Inverter frequency tracking to bypass frequency rate. The value range is 0.5 to 2. The
default value is 1.
Power supply upon BYP SCR over temp: Specifies whether to start bypass mode when over temperature occurs. The default
is enable.
Bypass Switches Limit: Cross currents occur during the transfer between bypass mode and normal mode, which impacts
the system. This parameter specifies the number of transfers between bypass mode and normal mode within 1 hour to ensure
system security. The value range is 3 to 10 and is 10 by default.
EPO transfers To BYP: Specifies whether the system transfers to bypass mode when the EPO button is pressed. The default
is disable.
Figure 4-32A: Bypass Settings
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