Load Banks
Load Banks
SIGMA LT
load bank control
ASCO Power Technologies | Avtron
6255 Halle Drive
Cleveland, Ohio 44125
U.S.A
Tel: 216.573.7600
Fax: 216.573.5953
www.emersonnetworkpower.com/loadbanks
LBsales@Emerson.com
ASCO Power Technologies | N J Froment & Co. Ltd
Easton-on-the-Hill
Stamford
PE9 3NP
United Kingdom
Tel: +44 1780 480033
Fax: + 44 1780 480044
www.froment.co.uk
loadbanks@froment.co.uk
Product Brochure
Specifications subject to change without notice.
Emerson Network Power is a trademark of Emerson Electric Co. or one of its affiliated companies.
©February 2016 Emerson Electric Co.
Bulletin 610 Rev. -
SIGMA LT CONTROL
SUPPLY
SIGMA LT is the latest version of the highly regarded SIGMA load bank control system for Avtron and Froment load banks. SIGMA LT provides unrivalled
features including digital toggle switches with LED metering and an optional
hand-held control to enable networking.
METERING
METERING
V/Hz/kW
V
/H
Hzz/kW
!
METERING
V/Hz/kW
V
/H
Hzz/kW
!
MODE
Vx3
5 kW
5 kW
10 kW
10 kW
10
0k
W
kW
20
0 kW
kW
20
0 kW
kW
20
0 kW
LOCAL
LOC
CAL
L
O
ON
5 kW
5 kW
10 kW
10 kW
10
0 kW
kW
20
0 kW
kW
20
0 kW
kW
20
0 kW
LOCAL
LOC
CAL
L
O
ON
48
80V
480V
VOLTAGE
SELECT
48
80V
480V
VOLTAGE
SELECT
ON
O
5 kW
10 kW
10 kW
10
0 kW
kW
20
0 kW
kW
20
0 kW
kW
20
0 kW
LOCAL
LOC
CAL
L
ON
O
LOAD
SELECT
48
80V
480V
TRO
OL
L
CONTROL
WER
POWER
MASTER
LOAD
SIGMALT Control
240V
REMOTE
ASCO Label P/N 1073470-001 Rev. C
5 kW
100 kW
ON
O
TRO
OL
L
CONTROL
WER
POWER
MASTER
LOAD
SIGMALT Control
240V
MODE
Ax3
2000 Series
Load Bank
LOAD
SELECT
100 kW
ON
O
Vx3
Ax3
2000 Series
Load Bank
LOAD
SELECT
100 kW
TRO
OL
L
CONTROL
WER
POWER
V/Hz/kW
V
/H
Hzz/kW
!
MODE
Vx3
Ax3
2000 Series
Load Bank
Available on selected 2000 and 3000 series load banks, SIGMA LT is a modular system and can be utilized both locally and remotely up to 820 ft from
the load bank. The local digital toggle control provides simplistic singular
load bank testing, with a full LED instrumentation display on the control
panel. The hand-held provides control for up to 25 networked load banks
providing the operator with the ability to synchronously apply load
proportionally or to a single load bank.
SIGMA LT HAND-HELD
Below: A typical SIGMA LT
control arrangement
VOLTAGE
SELECT
MASTER
LOAD
SIGMALT Control
240V
REMOTE
ASCO Label P/N 1073470-001 Rev. C
REMOTE
ASCO Label P/N 1073470-001 Rev. C
SIGMALT LOAD
BANK 1
SIGMALT LOAD
BANK 2
SIGMALT LOAD
BANK 3
DIGITAL TOGGLE
SWITCHES
DIGITAL TOGGLE
SWITCHES
DIGITAL TOGGLE
SWITCHES
WARNING
WARNING
The simple and sleek design of the hand-held provides numerous benefits for any load
bank operator. The image based display with multi-language options allows control of
either one or up to 25 load banks in a network. Load can be either shared proportionally
across the network, or individually set (useful for generating heat in HVAC testing and
verification). Using the hand-held also gives true derated loading as expected when
the working voltage is less than load bank nominal voltage. Load is applied synchronously to all load banks, giving ‘clean’ load switches.
WARNING
COLOR TOUCH SCREEN
LOAD SELECTION
SIGMA LT not only offers best-in-class features, but is also a cost effective
solution; the network will only require a single hand-held to remotely
control 1 to 25 load banks. SIGMA LT load banks of varying sizes can provide
a fleet with an extensive range of load.
SIGMA LT
HAND-HELD
(optional)
Load selection can be changed using
the - or + keys, where the hand-held
will step at the load resolution of the
minimum load step of all of the load
banks connected, thus giving a jog
action.
SIGMA LT DIGITAL TOGGLE SWITCHES
The high quality, 4.3" color touch screen with graphical
interface provides all the information exactly where you
would expect it, giving instrumentation and control
on just two screens. Information and status of the full
network is also available.
DURABILITY
The hand-held is enclosed in robust
aluminium to protect it from the
general wear and tear of operation.
Load selection can also be edited by
using the number pad, opened by
tapping the number.
The SIGMA LT digital toggle switch control panel is fitted as standard to all SIGMA LT
load banks and provides simplistic local control with the accuracy of digital. Load step
changes are synchronised by a short delay providing ‘clean’ load changes that would
not otherwise be possible with traditional toggle switches.
VOLTAGE SELECT
LOAD SELECT
MASTER LOAD
NETWORK
The load bank is able to be
reconfigured to give full load
capacity at both 480V and 240V.
(Selected models only).
The digital load select switches
mimic toggle switches, but with
enhanced features. The LED’s at
the top of the switch indicate the
load that has been selected. Load
changes are synchronised to
provide ‘clean’ switches.
Enables or disables load
selection. Turn off the master
load to reject all load on test.
Connect the hand-held and
other load banks for remote
networked load testing.
METERING
LOCAL/REMOTE
MODE
Three sets of seven segment
displays offer 3-phase voltage
and currents or voltage, frequency
and power. The displays will also
show status messages.
Toggle between local and the
remote, hand-held control.
Toggles between available
metering or status.
CONTROL EACH LOAD
BANK INDIVIDUALLY
METERING
V/Hz/kW
V
/H
Hzz/kW
!
MODE
Vx3
Ax3
2000 Series
Load Bank
5 kW
5 kW
10 kW
10 kW
0 kW
kW
10
0 kW
kW
20
0 kW
kW
20
Up to 25 SIGMA LT load banks can be networked for load tests
using the industry-standard CAN bus.
0 kW
20
LOAD
SELECT
100 kW
ON
O
48
80V
480V
TRO
OL
L
CONTROL
WER
POWER
LOCAL
LOC
CAL
L
VOLTAGE
SELECT
240V
REMOTE
ASCO Label P/N 1073470-001 Rev. C
ON
O
MASTER
LOAD
SIGMA Control
LT
NETWORK UP TO 25 LOAD BANKS
Networked load banks give a better overall load resolution,
for example: 3x100kW load banks and a 1x200kW load bank
can be put on one network giving a capacity of up to 500kW,
and a resolution of the smallest load step in the 100kW unit.
This is particularly beneficial if the supply on test is on a roof or
basement where a singular 500kW load bank could not access.
Networking smaller load banks for a 24 hour commissioning
tests provides the benefits of redundancy and finer load step
resolution.
DATA LOGGING &
STATISTICAL DATA
Connect a USB flash drive to the hand-held and
export load bank events and statistical data.
The data can then be imported into Microsoft®
ExcelTM (or similar program) for further analysis
or reports.
Also used for firmware updates of the handheld and networked load banks.
The SIGMA LT hand-held provides
individual load bank status and
control within a network. This feature
is completely unique and revolutionary
in the load bank control industry and
provides versatility for any application.