NORTHBRIDGE
Resistive(1.0pf) Loadbanks: 2kW – 3,500kW
Ratings
All standard Northbridge loadbanks are rated for continuous
operation in ambient temperatures up to 35°C, (tropicalized
versions are also available for operation at higher temperatures).
Resistive (1.0pf) loadbanks can be manufactured to any size at any
voltage and frequency to suit customer requirements.
A standard range of loadbanks with ratings between 2kW and
3,500kW at customer specified voltage and frequency are available
in standard frame sizes.
Resistive loadbanks are not effected by change in frequency but
must not be operated at voltage above the specified voltage. They
may however be used on lower voltages but the total load available
will be proportionally reduced.
When operating at reduced voltages or at frequencies other than
the specified frequency the cooling fans and control circuits will
require the connection of a suitable external auxiliary supply.
Standard resistive loadbanks with rating up to 1,600kW are
available in folded steel enclosure, larger loadbanks with ratings up
to 3,000kW are built in ISO type containers
100kW Transportable Loadbank
Standard Frame Sizes
Type
Transportable
Dimensions
Long
High
Fixed
Long
High
Both
Wide
Weight
mm
Kg
Frame
Max
Kw
A
10
550
415
550
400
475
25
B
30
825
515
825
500
500
52
C
100
750
720
845
675
875
130
D
300
825
1350
1000
1275
875
250
E
400
1275
1520
1450
1475
1025
390
F
700
1550
1520
1700
1475
1000
650
G
1200
2060
2200
2385
2100
1000
1340
H
1600
N/A
N/A
3100
2152
1000
1550
I
2600
2991
2430
2991
2430
2590
5100
J
3500
6068
2430
6058
2430
2590
6400
mm
mm
Enclosures
Folded steel and ISO container type enclosure are both available in two
forms: one designed for fixed installation at permanent outdoor
locations, the other transportable for moving from site to site. Both
types give IP55 and have overhead lifting facilities.
Resistive Elements
Totally enclosed tubular stainless steel elements, switched in groups of
various values by contactors provide a variable resistive load with a 1kW
resolution.
The elements are mounted inside an element chamber isolated from the
other equipment and cooled by forced air from motor driven fans.
The fans are controlled by DOL starters with thermal overloads
NORTHBRIDGE
DUSTRIAL SERVICES
and electrical interlocking which prevents load from being
applied unless the fans are running.
Thermal sensors will shed all load if the temperature inside the
element chamber exceeds a safe limit.
Air flow sensors are fitted on units rated above 400kW to
protect against loss or reduction in airflow.
NORTHBRIDGE
Middle East
United Arab Emirates
www.northbridge-me.com
200kW Fixed Loadbank
Industrial Services Pte Ltd
United Kingdom
www.crestchic.co.uk
Singapore
www.northbridge-ap.com
DUSTRIAL SERVICES
NORTHBRIDGE
Resistive(1.0pf) Loadbanks: 2kW – 3,500kW
Control Systems
Northbridge loadbanks can be supplied with any one of the
following five standard control systems, with each system being
carefully designed to meet a particular range of applications.
Basic Control
Provides the simplest form of control where load is required to
be switched in a limited number of fixed steps to provide manual
load test or dummy loading. The load steps are switched by
contactors, the coils of which are controlled by simple on/off
toggle switches mounted on the loadbank or are wired out to
the terminals for incorporation into the customers own control
system.
KCS Control
The most commonly used of the five types of control, this
manually operated PCB mounted system is used where accurate
local or remote manual control is required. Consisting of a
decoder and driver cards mounted in the loadbank, the system
can be supplied with any one of three types of control terminal:
local, remote or hand-held. Each allows loads to be selected and
applied with a 1kW switching resolution.
1,600kW Transportable in ISO Container
MCS Control
The MCS control system is used when automatic programmable
control and instrumentation is required. The sophisticated
computer control system consists of a Northbridge designed
micro-processor and a choice of remote control terminals.
The micro-processor inside the loadbank carries out all
computing needed for calculation and control of complex loads,
measurement and storage of data.
Control instructions are entered via a keyboard and data is
displayed on the screen of the control terminal.
Baseload Control
A low cost system designed to ensure that a generator never
runs below a preset minimum load.
Load is switched in one or two steps by contactors controlled by
a PCB mounted controller monitoring the 5 amp secondary of a
current transformer installed in one phase of the generator
output.
Load Trakker Control
Like the Baseload control this system is also designed to ensure
that a generator is never run below a minimum load level,
however, unlike the Baseload control system it uses a microprocessor based system constantly adjusting the load in 1kW
steps to maintain the preset minimum and can also be used to
manually control the loadbank allowing it to be used for
conventional periodic testing.
600kW Transportable Loadbank
We reserve the right to supply products which may differ in detail from those described and illustrated in this publication.
NORTHBRIDGE
NORTHBRIDGE
Middle East
United Arab Emirates
www.northbridge-me.com
DUSTRIAL SERVICES
Industrial Services Pte Ltd
United Kingdom
www.crestchic.co.uk
Singapore
www.northbridge-ap.com
DUSTRIAL SERVICES