| Because the
T6 has an IGBT input stage with digital control the
reflected harmonics are almost negligible, this means
that a supporting Generator can be de-rated. Example,
a conventional transformer based UPS would often require
that the generator be 2.5 times larger than the power
of the UPS, with the T6 1.5 times is sufficient, this
can often mean savings of 40% on the cost of the generator!
The T6 offers excellent protection against
mains feedback, traditional double conversion UPS find
such a problem difficult to resolve and have to revert
to the UPS by pass facility, however it’s not
uncommon for circuitry and or components to be damaged
before any such protective transfer can take place,
a prime example of this can be illustrated with CNC
machines which generate substantial feed back as a result
of magnetic brakes. A second solution to dissipate this
unwanted energy is to turn it into heat, although this
is an effective solution it is never the less a waste
of energy which in turn reduces efficiency. With the
T6 IGBT rectifier and filtering system this is a problem
of the past, the feedback energy is allowed to pass
back to the utility with no ill effect to the UPS or
the load. The T6 active filter makes the T6 series compatible
with almost any type of load.
Modern Technology For Efficient Use:
The T6 series offers much higher efficiency
when compared to traditional transformer based UPS,
the savings can be as high as 25% when compared to this
older technology. If the average three phase UPS is
30,000 watts it does take a rocket scientist to calculate
what the savings can be over the life cycle of the UPS.
As mentioned previously a side benefit to high UPS efficiency
is that air conditioning can be downsized which in turn
also dramatically reduces running costs.
T6 Low on Harmonics
Conventional UPS, particularly the type
that use six pulse rectifies, can reflect up to 30%
distortion back onto the mains supply, the effect of
such distortion can and does interact with other equipment
down stream from the UPS. These reflected harmonics
will shortly be subject to fines from governmental (EEC)
authorities who are tasked to maintain and improve the
utility supply for the benefit of all users. The T6
input stage is designed around a power factor corrected
IGBT rectifier thus the harmonics are almost negligible
with the added benefit of the current being drawn in
a sinusoidal fashion.
Compatible with linear loads and high
crest factor:
The T6 uses high performance high speed
microprocessors to control and maintain critical features
of the UPS. A common problem with a UPS is the issue
of Crest Factors, the T6 as a result of its high speed
control is able to handle crest factor anomalies whilst
maintaining the output voltage to within +/- 1%. By
having such tight control over the output voltage the
life of the machines attached to the UPS are extended,
yet another reason to let the T6 look after your load!
Small Footprint Big Power:
The AEC T6 is a masterful example of integrating
the benefits of Digital Technology to within the power
conversion industry. All essential control and regulation
is performed through software interfacing thus absolutely
no dependence is placed on mechanical or analogue devices.
To further enhance reliability and to reduce size the
majority of circuit boards within the T6 are SMT type
(Surface Mount Technology) giving the T6 a very robust,
compact and durable design. Typically a 100KVA has a
footprint of 0.46sqm this allows the user to maximize
the available space, remember also that the T6 is on
average 45% lighter than a conventional transformer
based design.
Intelligent Battery Management:
The T6 Microprocessor controlled battery
management system can have a dramatic effect in extending
battery life. The charger monitors the condition of
the batteries hundreds of times per minute, should the
ambient temperature change then the control circuit
will regulate the charging current to de-stress the
battery. If the battery has been discharged as a result
of a power failure then the T6 will increase its power
to recover the cell within the shortest time possible
whilst never compromising the cells integrity. A further
feature on the T6 is that batteries can be changed in
“Hot Swap” this feature allows a battery
change without the need to drop the load.
When a power failure occurs the time displayed
on the LCD or via your server is real time based on
the load v the battery capacity. This feature is crucial
for applications where an automated shutdown is required,
you always know what time you really have left.
Smart Energy Management:
Typically UPS efficiency increases as
full load approaches however with the T6 the differential
between full load and half load is marginal, efficiency
always remains high. When the T6 is run in parallel
the load is shared across all the machines equally,
up to six, however there are circumstances when the
load is so low that to run even the T6 would be wasting
energy. Under these circumstances machines not required
to support the load will go into sleep mode thus reducing
the demand for power, as the load starts to increase
the sleeping UPS will seamlessly reintroduce themselves,
all done automatically!
Digital Control System:
The T6 incorporates high performance
microprocessors allowing the UPS to be 100% digitally
controlled. The benefit of digital control over analogue
is that the digital system is faster and can easily
accept multiple tasks without sacrificing performance.
Because of the nature of digital information it is less
susceptible to external interference making the overall
system more robust. The topology of the T6 is fully
integrated which in layman’s means that each part
of the machine is talking to the other, so if one section
of the UPS finds itself in difficulty the other modules
will endeavour to protect both the UPS and the load.
Single or Dual Input Operation:
A standard feature on the T6 is a reserve
line facility. The advantage of a reserve line means
that the UPS has a fail safe option, should the primary
supply (the mains) fail or the UPS be severely overloaded
then the T6 will automatically revert to the reserve
line, the reserve line can be either a secondary mains
supply or more commonly a generator. Switching between
reserve and mains is all done without a break to the
load and in sync with the mains supply.
Battery Charger and Customizable Battery
Bank:
Several intelligent charging methods are
implemented that take place depending on the state of
the batteries. In this way, safe charging and longevity
is ensured. Besides, it is possible to alter the total
number of batteries. In case a few of the batteries
need to be replaced, just by setting a few parameters
on LCD panel the machine runs and charge the remaining
batteries with perfect reliability. This is highly beneficial
to ensure the continuity of operation.
Dual Interactive Display Screen:
Unlike other UPS the T6 incorporates
a duel screen display, screen (1) schematic of UPS,
Screen (2) menu and sub control, having this feature
gives immeasurably more control over the UPS. With traditional
single screen displays you have to go into sub-menus,
as you scroll through these and make selections you
may not be aware of the effect on the UPS or its status,
having a separate schematic of the whole system you
can clearly see how your choices are effect the whole
system.
Optional Accessories:
- Remote panel monitoring
- SNMP adapter
- Isolation transformer
- External maintenance bypass
panel
Redundant Operation:
The T6 can be run in parallel in a conventional
N+1 matrix with up to six other machines, a special
feature of the T6 will allow, if required, for one of
the number to be in a sleep mode, should it be required
to support the load it will do so instantaneously, further
a multi parallel system can be programmed to rotate
the sleeping UPS ensuring equal use of each machine.
Parallel Systems
As stated in the previous paragraph the
T6 can be run in parallel offering to either increase
the capacity of the existing UPS, i.e. 100KVA can be
paralleled up to 600KVA or alternatively the machine
can be run in an N+1 setup. When in N+1 mode each UPS
is talking to the other without the need of a conventional
master slave relationship. Should any of the machines
fail the remaining systems will seamlessly pick up the
load and raise the relevant alarms.
(Optional) Cable Free Paralleling:
While running in parallel the T6 UPS does
not require any cable interconnection between the units.
With its digital control and high speed microprocessors
married to cutting edge wireless technology the T6 is
now even easier to install.
Hot Power Upgrade and Easy Service:
Where machines are in a parallel configuration
hot swap servicing can be performed. Regardless of the
size of the UPS machines can be closed down, serviced
or even removed. all without interruption to the load.
Flexible Installation:
If machines need to be in a parallel configuration
and providing the cable free option has been installed
the T6 can be located in different parts of the building
thus giving the installer the option of maximizing space.
Centralised Static & Maintenance
Bypass:
AEC is able to offer, when required, a
centralised static switch array, this is especially
useful when multiple UPS are being used. By using the
one centralised switch a more robust system can be built.
Redundant bypass for increased
reliability
We can configure the installation
to include a redundant bypass system to further reduce
potential failure points while keeping the MTTR to a
minimum. In case of failure to an upstream protection
device, the standby bypass instantly takes the load
without any interruption.
Group loading
Optional group loading is available on
for T6. Individual UPS loading based on priority is
especially advantageous as this provides functional
separation of loads and increasing the MTTR. Group loading
has the added advantage of facilitating selective maintenance
on the UPS and switchgear.
Dual Bus Configuration
For applications requiring a continues
and highly critical source of supply this configuration
offers an effective solution. By feeding the Static
transfer switch module with dual supplies, further redundancy
if provided to the critical load because two live supplies
are available for the static switch to instantaneously
switch between. By cascading for static switches for
supply sources can be added increasing the reliability
further.
Connectivity Solutions
EPC with RS232 and RS485 Communication:
To observe, protect, shutdown, command
and control the UPS parameters from your PC via serial
link the T6 EPC software professionally meets all the
requirement with its variety of features.
* Provides safe operation by warning
the users at other terminals connected to the network.
* Reports changes in UPS operational status automatically
by e-mail and SMS.
* Safely shutdown to operating systems like UNIX,
Linux, Windows over network.
* Remote control of the UPS can be done by connecting
a modem to the device.
AEC offer a broad range of communication
options with the T6 from local to worldwide remote power
management solutions.
SNMP: network solution:
Simple Network Management Protocol (SNMP)
is a protocol that can manage and monitor the UPS over
TCP/IP network.
* Monitoring of UPS systems connected
in the Network via SNMP Software and respective SNMP
adapter
* Recording UPS events and data for a definite period
* Warning message over network
* Sending SNMP trap/e-mail/pager for events notification
* Graphic display of the UPS input data and graphic
screens containing UPS information
* User-friendly interface
REMOTE MONITORING PANEL:
Where intelligent monitoring is required
and no network is available the T6 remote panel provides
the monitoring of UPS events and parameters remotely
from the UPS location.
Using RS485 communication protocol the remote panel
provides monitoring via a real time LCD display with
an alphanumeric interface enabling the end user to clearly
identify the UPS status and alarms.
Custom interface instruction
The T6 has the facility to adapt into
environments requiring particular critical performance
criteria. The T6 can interface with external signals
instructing an Emergency Power Off, instigation of static
bypass and rectifier soft start for Generator installation.
Dry Contact:
The volt free dry contacts can be customised
from the user interface. This facilitates the user to
use an individual relay contact for individual alarm
events without changing the hardware.
GPRS MODEM:
For optimum service performance
Continuous and remote reliable
interfacing is an important requirement. The optional
GPRS modem is available for true remote monitoring and
troubleshooting. In order to reduce the MTTR this wireless
and worldwide applicable technology is implemented.
For an animation depicting how bypass
switches work within the UPS system, click
here. |
