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Chapter 1 General Description 5
HIPULSE U UPS Single Module And “1+N” (Expandable) 160/200/300/400kVA User Manual
Auto-restart mode
The battery becomes exhausted following an extended AC mains failure. The inverter shuts down when the battery
reaches the end-of-discharge voltage (EOD). The UPS can be programmed to Auto Recovery after EOD after a set
variable delay time. This mode and any delay time are programmed by the commissioning engineer.
Bypass mode
The load power is supplied though the mains static bypass line. This may be considered as an intermediate operating
condition being utilized for the purpose of load transfers between inverter and maintenance bypass or supply under
abnormal operating conditions.
Maintenance mode
The UPS is shut down but the load is connected to the unprotected mains through the maintenance bypass supply
line.
Source Share mode
The UPS has the capability of fully supporting their critical load while limiting the amount of power taken from the
incoming AC mains supply. Any balance of power required is supplied by the UPS battery. This feature is useful, for
example, in applications where peak-hour tariffs apply or where a generator smaller than needed feeds the UPS
during mains outages. The Source Share mode is user-activated and the ratio of the mains AC input power is
programmable from 20% to 100% of the rated UPS power.
ECO mode (for single UPS only)
All power switches and the BCB are closed, the system prefers to put the load on the bypass mains, with the inverter
on stand-by; only when the voltage and/or frequency of the bypass supply are beyond pre-defined and adjustable
limits is the critical AC load transferred to the inverter.
Parallel redundancy mode (system expansion)
For higher capacity or higher reliability or both, the outputs of up to six UPS modules can be programmed for directly
paralleling while a built-in parallel controller in each UPS ensures automatic load sharing.
Frequency converter mode
The UPS can be programmed into Frequency Converter mode for either 50Hz or 60Hz stable output frequency. The
input frequency may vary from 45Hz to 65Hz. In this mode, it is required to open the bypass switch to disable the
static bypass operation, and the battery becomes optional depending on any requirement to operate in Battery mode.