Load banks are often divided into several resistive or inductive units, in the form of DC, single phase AC or three phase AC. The basic applications of load banks are:
- Testing of Diesel Generator, Gas Turbine, UPS, Industrial Battery, Inverters and Switchgears, in order to investigating the problems related to design, performance, balanced output and units capacity.
- Load stabilization and reduction of power fluctuations.
- Load simulator in the aerospace and marine industries.
In some cases, the load connected to the generator varies in a wide range, which is usually due to seasonal variations in load or due to the variable nature of the load itself. When facing low load, it is necessary to add several dummy loads that cause the generator to operate at least 20% to 40% of rated capacity (base load). Therefore, the dummy load banks require a load sensing relay in the control panel.
Main specifications of Load Banks
The main specifications of load banks are: Rated Voltage, Rated Power, Power Factor, Rated resistance, Rated inductance, number of steps, number of phases and type of connection.
Paarsun Co. designs and manufactures Load Banks, considering the above parameters, plus the increase in permissible temperature of the element according to the standard, the type of cooling (Air Natural, Air Force or Oil Natural), the maximum air temperature at fan output and vibrations in the system. Load banks can be designed either in multiple steps or single-step, automatic or manual and fixed or mobile mode.
Paarsun Co. Load Banks are designed with 20% overload in rated power of the generator and the number of steps is considered according to customer’s order.
The rated power of the Dummy Load device is proportional to the base load of the generator, so the minimum power of the Dummy Load device designed in this company is generally considered to equal to 30% of the rated power of the generator, which can be changed based on customer request.