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18
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OPERATING MODE
M
ODULAR
UPS
S
YSTEM
Modular UPS Systems are intended to ensure a perfect supply voltage for the equipment connected to it, both with and without a
power supply network. Once connected and powered, the system generates an alternating sinusoidal voltage, with stable
amplitude and frequency, regardless of surges and/or variations affecting the electrical supply.
The Modular UPS System features three types of cabinets: Modular UPS Power Cabinet, Modular UPS Combo Cabinet and
Modular Battery Cabinet, whose main functions and features will be highlighted within this manual.
Modular UPS Systems are designed and manufactured to be durable. However as with any electrical power system, they require
regular maintenance. Furthermore, some of the components have, inevitably, a fixed life cycle and therefore they must be regularly
checked and replaced, if the conditions requires it: in particular, batteries, fans and in some cases the electrolytic capacitors.
It is therefore recommended that a preventative maintenance program is implemented and performed by specialized staff whom
are approved and certified by the manufacturer.
Our Service Department is at your disposal for customizing preventative maintenance options to suit your requirements.
N
ORMAL
M
ODE
During the NORMAL MODE, the system operates in On Line double conversion. This mode provides maximum protection for the
load. During operation the energy coming from the electrical supply network (AC), is converted into a clean and stable output. The
voltage supplied to the load is a perfect sinewave, with the frequency and voltage independent of the incoming mains supply (VFI
technology). During this mode, the batteries are constantly maintained in a charged condition.
B
ATTERY
M
ODE
When the AC power network falls outside the pre-set tolerances, for example, in case of a blackout or voltage or frequency
interferences, the system automatically switches to the BATTERY MODE and takes power from the batteries to support the load.
When the AC network is again clean and stable, the system returns back to the NORMAL MODE operation.
The Power Walk-In function can be activated through the configuration software. This function allows, upon reconnection to the
network (following a supply failure), a progressive absorption of power from the incoming supply, in order to avoid stressing (due
to the inrush current) a generator which is installed upstream, if fitted. The duration of the transition mode can be set between 1
to 125 seconds. The default value is 10 seconds (when the function is enabled). During the transition mode the required power is
partially collected from the batteries and partially from the network whilst maintaining a sinusoidal ramp-up. The battery charger
is switched on again when the transition mode ends.
A
UTOMATIC
S
TATIC
B
YPASS
M
ODE
During this operation mode, the load is directly powered by the AC supply, therefore, any input interference will direct effect the
connected load.
E
CO MODE
In order to optimise efficiency, in ECO
(1)
mode, the load is normally powered via the bypass supply (any disturbances that occur
in the network can directly effect the load). In the event of a mains power supply failure or if the power supply is not within the pre-
set tolerances, the UPS will switch to normal ON LINE operation with double conversion. Approximately five minutes after the
power supply returns within tolerance, the load is switched back to bypass.
F
REQUENCY CONVERTER
The system can be configured in this mode to generate a fixed output frequency different from the input frequency. This
configuration automatically disables the bypass line.
E
NERGY SAVING
The ENERGY SAVING mode
(1)
makes it possible to improve the total system efficiency, particularly at low loads, whilst preserving
the ON LINE mode and the redundancy level set. The PMs that are not required to support the applied load are placed in a low
consumption state. In the event of a mains power supply failure or if the power supply is not within the specified conditions, all of
the PMs switch to normal ON LINE operation with double conversion. If there are any sudden and high load increases, the system
continuity is guaranteed with a possible temporary transfer to bypass.
NOTE: the Home Page always displays the active operating mode.
(1)
These operating modes can only be selected from the “Expert” user profiles (see “Access level selection”)
Summary of Contents for multipower BTC 170
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Page 8: ...8 GENERAL VIEWS Front view Back view Frame Handle with lock Door Back Panel...
Page 20: ...20 The wiring diagram of the Modular UPS Power Cabinet is provided below...
Page 23: ...23 The wiring diagram of the Modular UPS Combo Cabinet is provided below...
Page 54: ...54 Combo Cabinet...
Page 55: ...55 Battery Cabinet...
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