When talking about banks, three major banks exist in this world. There is the reactive bank, the resistive bank and resistive/reactive bank. In the following discussion, we are going to look at all these banks.
This is the most common loading bank that involves loading both the prime mover and the generator. This means that for every horsepower that is applied to the involved generator by the load bank, the equivalent amount is applied to the involved prime mover by the generator. Therefore, this is crystal clear that the resistive load bank does the work of eliminating energy from the entire system. That means removing the bank load from the generator, removing the generator from the prime mover and finally the prime mover from fuel. Additionally, the main reason why energy is removed from the entire system is that of the load bank operation. The waste heat that comes from the coolant, the losses from the generator and exhaust and the consumed energy by the accessories must all be removed. A resistive load bank is very crucial since it’s very impactive in the generator system.
Moreover, the creation of the load of the load bank is usually a very simple thing. It just involves the conversion of electrical energy to heat energy using the power resistor. However, the converted heat should be dissipated from the load bank using the normal ways such as air, water, convection or forced means. Furthermore, resistive load system is very crucial in the testing system. It aids in simulating resistive loads such as heating loads, lighting loads and the unit power factor which is a factor component of the magnetic loads.
Categories of resistive load banks
Portable DC: This is normally a type of resistive load bank that that is usually pushed on the wheels for maintenance and testing of the Dc Power devices such as battery systems, battery chargers, UPS systems and finally the Dc generators.
Large Portable AC: This is another type that is located on the wheel for the purpose of testing and maintaining huge or rather large AC power devices such as generators of up to 1000kw and UPS systems.
Small Portable AC: This is an easily carried resistive load bank that is normally pushed on the wheels and meant for maintenance and testing of the AC equipment such as generators of up to 150kw and UPS systems.
Trailer Mounted AC: This is another type of resistive load bank that is normally loaded on a trailer for the purpose of maintaining and testing equipment related to AC power such as generators of up to 3000kw and UPS systems.
Stationery AC: Meant for maintaining and testing UPS systems and AC power systems such as generators of up to 4000kw.
Medium/High Voltage AC: Used for maintaining and testing large generators and other related AC power equipment that can consume power up to 15,000 volts.
Radiator Cooled AC: Meant for maintaining and testing AC power equipment devices consequently making good use of their radiator air outflow belonging to generator engine to cool the resistive load elements.
Water Cooled AC: A type of resistive load bank that is meant for maintaining and testing equipment that is related to AC power consequently making use of water instead of for cooling purposes of the elements related to the resistive load.
The reactive bank
This bank includes two categories of bank: the inductive and the capacitive.
The inductive category
This is the most common category that normally has a reactive element consisting of iron core which usually creates the lagging power factor load when working together with the resistive load bank. The inductive load banks are used in simulation of real-life commercial loads which has things such as transformers, motors, heating, and lighting.
The Capacitive category
This bank load is very similar to the reactive type especially in the purpose and rating features only for the small difference that comes in the leading power factors loads that are normally created. They are applied in the simulation of linear or electronic loads that are typically used for telecommunication.
Reactive/Resistive Load Banks
This combines all the features of the reactive and resistive load bank packages that go up to 6250KvA.