Electronic
Figure 3.31 Electrical Setting Screen 1
1. Output VOL: Select the output rated voltage.
a. If the UPS is HV system, there are four options, 208V, 220V, 230V and 240V.
b. If the UPS is LV system, there are two options, 120V and 127V.
2. Output FRE: Select output rated frequency.
a. 50Hz: The output frequency is setting for 50Hz.
b. 60Hz: The output frequency is setting for 60Hz.
3. CVCF Mode (constant voltage and constant frequency function)
a. Enable: CVCF function is enabled. The output frequency will be fixed at 50Hz or 60Hz according to setting
of “OP Freq.”. The input frequency could be from 40Hz to 70Hz.
b. Disable: CVCF function is disabled. The output frequency will synchronize with the bypass frequency
within 45~55Hz for 50Hz system or within 55~65Hz for 60Hz system. Disable is the default setting.
4. Bypass Forbid:
a. Enable: Bypass forbid is allowed. When selected, it is not allowed for running in Bypass mode under any
situations.
b. Disable: Bypass forbid is not allowed. When selected, UPS will run in Bypass mode depending on “Bypass at
UPS off” setting. It is the default setting.
5. Neutral Line Check: Indicates neutral loss detection function.
a. Disable: Disable the neutral line check function. The UPS will not detect if the neutral line is loss or not.
b. Auto: The UPS will automatically detect if the neutral is lost or not. If neutral loss is detected, an alarm will
be generated. If the UPS is turned on, it will transfer to battery mode. When neutral line is restored and
detected, the alarm will be muted automatically and the UPS will go back to normal mode automatically.
c. Check: The UPS will automatically detect the neutral loss. If neutral loss is detected, an alarm will be
generated. If the UPS is turned on, it will transfer to battery mode. When neutral is restored, the alarm will
NOT be muted automatically and the UPS will NOT go back to normal mode automatically.
6. ISO Compensation:
When UPS is connected to output isolation, it will compensate the output voltage.
3 Operations Proprietary and Confidential ©2024 Vertiv Group Corp. 47
Vertiv™ Liebert® MTP Online UPS User Manual 20-40-80kVA
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