COVER HS Series – User manual
COMEX S.A.
29
view of the power supply. Voltage return on the professional network automatically returns to
normal mode, without the need to intervene.
Note: The UPS can also be started from the battery in the so-called mode. "Cold start", ie in the absence
of basic power.]
3.4.3
Automatic restart
In case of prolonged power failure when the batteries are discharged after reaching the
minimum voltage (EOD - End Off Discharge). The UPS is turned off.
The power supply can be configured for automatic restart after a service time delay set by the
serviceman. The restart mode and any delay of the inverter can be programmed by the
manufacturer's service.
During the programmed delay time of the inverter, the batteries are charged so that when the
inverter is turned on, the receivers will be protected in the event of a power failure.
3.4.4
Bypass mode
In the case of overload of the power supply, overheating or other causes such as damage to the
inverter in normal operation, the bypass switches are automatically and uninterruptedly
switched to bypass.
3.4.5
Service bypass mode
The manual service bypass provided by the UPS allows you to carry out periodic maintenance
work on the unit without de-energizing the power supply to the receivers. Service Bypass can
be activated only when the UPS is in Bypass mode. Therefore, first switch the UPS to Bypass
mode and then switch on the service bypass switch.
Attention
When the UPS is in service bypass mode, the power modules and the LCD display do not work. Please note
that there is a dangerous voltage on the terminal strip to which the power supply and the load are
connected.
3.4.6
Economical (ECO)
In ECO mode, receivers are powered directly from the network through the Bypass reserve
circuit, which improves the efficiency of the power supply and reduces energy consumption. In
ECO mode, the preferred source of power is the bypass circuit until the voltage and frequency
remain within acceptable tolerances. If the voltage parameters in the Bypass line are outside
the set tolerance range, the inverter will automatically switch to the inverter output. Frequency
switching is less than 15 ms for 50 Hz and 12.5 ms for 60 Hz.
3.4.7
Frequency converter mode
In the frequency converter mode, the power supply can be used to generate a fixed output
frequency of 50 or 60 Hz. The input frequency tolerance range at which a stable output
frequency can be generated is 40-70 Hz. Bypass mode is not available in this mode. In the event
of power failure, the UPS generates the set frequency using the battery voltage.
警告
危 险
