Resistive/Reactive Loadbanks


Technical Data

Resistive Load Banks
Load Modules
Resistive Load Modules
Reactive Load Banks
Control Systems
Control Systems - Basic, ACS MCS
Control Systems - Computer
Control Systems - Terminal Options


Resistive Load Banks 2k/W - 3500kW

RATINGS
All standard Crestchic Load Banks are rated for continuous operation in ambient temperatures up to 35¼C, tropicalised versions are available for operation at higher temperatures. Resistive load banks can be manufactured to any size at any voltage and frequency to suit customers requirements. A standard range of load banks with ratings between 2kW and 3500kW at customers specified voltage and frequency are available in standard frame sizes. Resistive load banks are not effected by change in frequency but must not be operated at voltages 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 load banks with ratings up to 1600kW are available in folded steel enclosures, larger banks with ratings up to 3500kW are built in ISO type containers.

ENCLOSURES
Folded steel and ISO container type enclosures 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 1P55 protection 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 other equipment and cooled by forced air from motor driven fans. The fans are controlled by DOL starters with thermal overloads and electrical interlocking which prevents load from being applied unless 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.

 

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Load Modules

Crestchic Load Banks are available in two forms, Resistive and Reactive, and are designed to produce a controlled, variable AC load for commissioning, periodic testing or load management of generators and UPS systems.

SELECTING THE CORRECT LOAD TO SUIT YOUR APPLICATION
Where the load is required for carrying out regular periodic testing of generators a resistive load is normally used, this being adequate to prove the output of the engine, transient and steady state performance of the governor and installation temperature rises. However, when commissioning includes parallel operation of two or more generators then reactance and resistance is needed to produce a lagging power factor load in order that the test engineer may adjust and verify the automatic sharing of both active and reactive components of the load.

Where 'load management' is needed on a diesel generator, to prevent damage to the engine caused by low load operation, a resistive load is normally used with manual or fully automatic control to maintain an adjustable minimum load on the generator.

Testing UPS systems and type testing alternators requires resistance and reactance to produce a lagging power factor load which can be fixed at 0.8 pf lagging or variable between a specified figure and unity.

TYPE OF LOAD Reactive load can be supplied as stand-alone modules for use with resistive units or combined with the resistive load into a single module.

Standard Resistive AC load modules are available in six frame sizes with ratings between 10 kW and 1200 kW. These are manufactured for operation on a single voltage and frequency specified by the customer when requesting a quotation. Units suitable for use on dual or multiple voltages and frequencies can be quoted on request.

Both Resistive and Reactive units are available for fixed installation, transportable with castors or with the option of road trailers.

SPECIFYING THE LOAD
In order to supply the correct load for your application the following minimum information is required:

  • Resistive Load Banks
  • Load Modules
  • Resistive Load Modules
  • Reactive Load Banks
  • Control Systems
  • Manual or Computer Control
Having specified which type of load is required the customer must now decide which method of control is best for his application. Three types of control systems are available together with a range of controllers, all of which are described in the control section of this Web site.

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Crestchic Dealer of a variety of load banks. Includes resistive load banks, generator load banks and electrical load banks, as well as load bank testing and load bank services of used load banks and load bank rentals.