Load Bank Fundamental of Load Bank Load Bank Brief Introduction for Load Bank · Page 1 LOAD BANK OVERVIEW LOAD TEST CAPACITY TYPES OF LOAD BANKS A load bank is a device The desired capacity of the load There are two types of load designed to provide electrical test is expressed in kilowatts banks: resistive, reactive, and loads for testing various power (KW). KW corresponds directly resistive/reactive. sources. Although the most to engine HP (0.746 HP=KW) Resistive: the most common common use of load banks for and is developed exclusively by type, proves equivalent loading testing is with engine generator the resistive load bank. Adding of both generator and prime sets, in fact, any device which reactive load changes the total mover. generates electricity may KVA of the load, but does not Inductive: Inductive loads require a load bank for testing, alter the KW or HP load. A consist of iron-core reactive service or calibration. This purely resistive load bank elements. includes UPS, batteries, power provides a realistic and effective Capacitive: A capacitive load supplies, fuel cells, solar cells, test of the prime mover and bank creates leading power wind turbines, hydro generator, causes full load currents. factor loads. etc. Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 Resistive Load Bank Load Bank for AC & DC System Resistive Load Bank Load Bank for AC & DC System · Page 2 Resistive load bank, the most common type, proves equivalent loading of both generator and prime mover. That is, for each kilowatt (or horsepower) of load applied to the generator by the load bank, an equal amount of load is applied to the prime mover by the generator. A resistive load bank, therefore, removes energy from the complete system: load bank from generator—generator from prime mover—prime mover from fuel. Additional energy is removed as a consequence of resistive load bank operation: waste heat from coolant, exhaust and generator losses and energy consumed by accessory devices. A resistive load bank impacts upon all aspects of a generating system. The “load” of a resistive load bank is created by the conversion of electrical energy to heat by power resistors. This heat must be dissipated from the load bank, either by air or by water, by forced means or convection. In a testing system, a resistive load simulates real‐life resistive loads, such as lighting and heating loads as well as the resistive or unity power factor component of magnetic (motors, transformers) loads. Resistive load banks can be further divided into these categories: DC Portable: A resistive load bank easily carried or pushed on wheels for testing and maintaining DC power equipment such as battery chargers, battery systems, UPS systems, and DC generators. AC Small Portable: A resistive load bank easily carried or pushed on wheels for testing and maintaining AC power equipment such as UPS systems and generators up to 150 kW. AC Large Portable: A resistive load bank on wheels for testing and maintaining larger AC power equipment such as UPS systems and generators up to 1000 kW. AC Stationary: A resistive load bank for testing and maintaining AC power equipment such as UPS systems and generators at one location up to 2500 kW. Many models can be used as modular building blocks for applications requiring capacity of tens or hundreds of megawatts. AC Medium/High Voltage: A resistive load bank for testing and maintaining larger generators and other AC power equipment up to 7000 kW and up to 15,000 volts. Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 100kW@380VAC 3Phase for Resistive Load Bank AC Small Portable · Page 4 Main Application Engine Test Switch, Contactor Test UPS, Generator System Product Specification Small Size, High Power Portable Continuous Working Capacity Rate [email protected] Rate Pow er（kW） Resolution（ kW） 380V 3P 100kW 5, 10, 10, 25, 50 Voltage Controlling Moving 380V 3P 50Hz-60Hz switch Wheel Working Power Display Weight 220V@50Hz 1P V, A , P, Hz 280kG Protection Dimension High Temp. Warn、Short 850x550x1300（L*D*H） Circuit Protection Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 500kW@380VAC 3Phase for Resistive Load Bank AC Large Portable · Page 5 Main Application UPS System Generator System Engine Product Specification High Power Portable Continuous Working Capacity Rate [email protected] Rate Pow er（kW） Resolution（ kW） 380V 3P 500kW 5, 10, 10, 25, 50, 100, 100, 100, 100 Voltage Controlling Moving 380V 3P 50Hz-60Hz switch Wheel Working Power Display Weight 380V@50Hz 3P V, A , P, Hz 980kG Protection Dimension High Temp. Warn、Short 1850*1550*1550（L*D*H） Circuit Protection Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 1200kW@380VAC 3Phase for Resistive Load Bank AC Stationary · Page 6 Main Application UPS System Generator System Engine Product Specification High Power Stationary Continuous Working Capacity Rate [email protected] Rate Power（kW） Resolution（kW） 5, 10, 10, 25, 50, 100, 100, 100, 200, 380V 3P 1200kW 200, 200, 200 Voltage Controlling Moving 380V 3P 50Hz-60Hz Computer Lift eye, fork lift Working Power Display Weight 380V@50Hz 3P V, A , P, Hz 2400kG Protection Dimension High Temp. Warn、Short 2400*1900*1850（L*D*H） Circuit Protection Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 1200kW@15000VAC 3Phase for Resistive Load Bank AC Medium/High Voltage· Page 7 Main Application UPS System Generator System Engine Product Specification High Power Stationary Continuous Working Capacity Rate [email protected] Rate Power（kW） Resolution（kW） 5, 10, 10, 25, 50, 100, 100, 100, 200, 15000V 3P 1200kW 200, 200, 200 Voltage Controlling Moving 380V 3P 50Hz-60Hz Computer Lift eye, fork lift Working Power Display Weight 380V@50Hz 3P V, A , P, Hz 2400kG Portection Dimension High Temp. Warn、Short 2400*1900*1850（L*D*H） Circuit Protection Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 1-6kW@110-220VAC 1Phase for Resistive Load Bank AC Stationary · Page 8 Main Application UPS On Line Test Data Center Test Battery Test Product Specification Rack-mounted Design Parallel Available Continuous Working Capacity Rate Power Resolution （kW） L*W*H(mm) Weight(kg) 1kW 0.5, 0 .5 485*88*550（2U） 6 3kW 0.5, 0.5, 1, 1 485*133*550（3U） 8 4kW 0.5, 0.5, 1, 1, 1 485*178*550（5U） 10 6kW 0.5, 0.5, 1, 2, 2 485*267*550（6U） 12 Voltage Controlling Moving 380V 3P 50Hz-60Hz Switch, Software Handle Working Power Display Connection 220V@50Hz 1P V, A , P, Hz R485 Protection Cooling High Temp.、Short Air forced Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 Reactive Load Bank Load Bank for AC & DC System Reactive Load Bank Load Bank for AC & DC System · Page 9 Reactive A “reactive” load includes inductive (lagging power factor) and/or capacitive (leading power factor) loads. Inductive Inductive loads, the more common type, consist of iron‐core reactive elements which, when used in conjunction with a resistive load bank, create a lagging power factor load. Typically, the inductive load will be rated at a numeric value 75% that of the corresponding resistive load such that when applied together, a resultant 0.8 power factor load is provided. That is to say, for each 100KW of resistive load, 75KVAR of inductive load is provided. These reactive load banks are available up to 1875 kVAR. Other ratios are possible to obtain other power factor ratings. Inductive loads are used to simulate real‐life mixed commercial loads consisting of lighting, heating, motors, transformers, etc. With a resistive/inductive load bank, full power system testing is possible given the impact of reactive currents on generator/voltage regulator performance as well as effects on conductors and switchgear. Capacitive A capacitive load bank is similar to a reactive load bank in rating and purpose, except that leading power factor loads are created. These loads simulate certain electronic or non‐linear loads typical of telecommunications, computer or UPS industries. Resistive/Reactive Load Banks Resistive/reactive load banks combine both resistive and reactive elements in one load bank package up to 6250 kVA. Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China www.nengyitech.com [email protected] Tel.：0769‐81220976 Ph.：13686602212 30kW@380VAC 3Phase for Reactive Load Bank Inductive Load bank · Page 10 Main Application Inductive Simulation Switch, Contactor Test UPS, Generator System Product Specification Small Size Portable Continuous Working Capacity Rate Voltage Rate Power（ kW）@PF0.8 Resolutio n（kW） 380V 3P 30kW 10, 20 Voltage Controlling Moving 380V 3P 50Hz/60Hz