Load Bank. Fundamental of Load Bank TYPES OF LOAD BANKS LOAD TEST CAPACITY LOAD BANK OVERVIEW

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1 Load Bank Load Bank Fundamental of Load Bank Brief Introduction for Load Bank Page 1 LOAD BANK OVERVIEW A load bank is a device designed to provide electrical loads for testing various p sources. Although the most common use of load banks for testing is with engine generator sets, in fact, any device which generates electricity may require a load bank for testing, service or calibration. This includes UPS, batteries, p supplies, fuel cells, solar cells, wind turbines, hydro generator, etc. LOAD TEST CAPACITY The desired capacity of the load test is expressed in kilowatts (KW). KW corresponds directly to engine HP (0.746 HP=KW) and is developed exclusively by the resistive load bank. Adding reactive load changes the total KVA of the load, but does not alter the KW or HP load. A purely resistive load bank provides a realistic and effective test of the prime mover and causes full load currents. TYPES OF LOAD BANKS There are two types of load banks: resistive, reactive, and resistive/reactive. Resistive: the most common type, proves equivalent loading of both generator and prime mover. Inductive: Inductive loads consist of iron-core reactive elements. Capacitive: A capacitive load bank creates leading p factor loads. Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China

2 Resistive Load Bank Resistive Load Bank Load Bank for AC & DC System 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 horsep) 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 p 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 p 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 p 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 p 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 p equipment such as UPS systems and generators up to 1000 kw. AC Stationary: A resistive load bank for testing and maintaining AC p 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 p 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

3 100kW 0VAC 3P Phase fo or Resisttive Loa ad Bank k AC Small Po ortable Page 4 M Main Applicatio on Engine Test Switch, Contacttor Test eneratorr System UPS, Ge Prroduct Specification Small Size, S High h P Portablle uous Wo orking Continu Ca apacity Rate Rate Pow wer kw 3P kW Reso olution kw 5, 10, 1 10, 25 5, 50 Volttage olling Contro oving Mo V 3P 50Hz-60Hz switch Wh heel Worrking Po y We eight 220V V@50Hzz 1P 280 0kG Protecttion Dim mension n High Te emp. Wa arn Short 850 0x550x L*D D*H Circuit Protection Donggguan Nengyi Eleectrical Technology Co., Ltd No 2, Youyi Roaad, Houjie Town n, Dongguan Citty, Guangdong Province, Chinaa nengyitecch@126.com Teel Ph

4 Resistive Load Bank 3Phase for AC Large Portable Page 5 Main Application UPS System Generator System Engine Product Specification High P Portable Continuous Working Capacity Rate Rate P(kW) Resolution( kw) 3P 500kW 5, 10, 10, 25, 50, 100, 100, 100, 100 Voltage 3P 50Hz-60Hz Controlling switch Moving Wheel Working 3P Weight 980kG Protection High Temp. Warn Short Circuit Protection Dimensionn 1850*1550* *1550(L*D*H) Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China

5 1200k 0VAC 3Phase for f Resisttive Loa ad Bank k AC C Station nary P Page 6 M Main Applicatio on UPS System em Generator Syste Engine Prroduct Specification High Po Stationary uous Wo orking Continu Ca apacity Rate Rate Pow wer kw 3P kW Reso olution kw 5, 10,, 10, 25, 50, 100, 100, 100 0, 200, 00, 200, Volttage olling Contro oving Mo V 3P 50Hz-60Hz Compu uter Liftt eye, fo ork lift Worrking Po y We eight V@50Hzz 3P kG Protecttion Dim mension n High Te emp. Wa arn Short *1900**1850 L L*D*H Circuit Protection Donggguan Nengyi Eleectrical Technology Co., Ltd No 2, Youyi Roaad, Houjie Town n, Dongguan Citty, Guangdong Province, Chinaa nengyitecch@126.com Teel Ph

6 1200kW 00VAC 3Phase e for Resisttive Loa ad Bank k A Mediium/Hig AC gh Volta age Pa age 7 M Main Applicatio on UPS System em Generator Syste Engine Prroduct Specification High Po Stationary uous Wo orking Continu Ca apacity Rate Rate Pow wer kw 15000V 3P 1200kW Reso olution kw 5, 10,, 10, 25, 50, 100, 100, 100 0, 200, 00, 200, Volttage olling Contro oving Mo V 3P 50Hz-60Hz Compu uter Liftt eye, fo ork lift Worrking Po y We eight V@50Hzz 3P kG Portecttion Dim mension n High Te emp. Wa arn Short *1900**1850 L L*D*H Circuit Protection Donggguan Nengyi Eleectrical Technology Co., Ltd No 2, Youyi Roaad, Houjie Town n, Dongguan Citty, Guangdong Province, Chinaa nengyitecch@126.com Teel Ph

7 Resistive Load 1Phase for 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 P Resolution(kW) L*W*H(mm) Weight(kg) 1kW 0.5, *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 3P 50Hz-60Hz Controlling Switch, Software Moving Handle Working P 220V@50Hz 1P Connection R485 Protection High Temp. Short Cooling Air forced Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China

8 Reactive Load Bank Reactive Load Bank Load Bank for AC & DC System Load Bank for AC & DC System Page 9 Reactive A reactive load includes inductive (lagging p factor) and/or capacitive (leading p 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 p 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 p 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 p 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 p 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 p 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

9 30kW VAC 3P Phase fo or Reacttive Loa ad Bank k Inductiive Load d bank Page 10 M Main Applicatio on Inductiv ve Simullation Switch, Contacttor Test eneratorr System UPS, Ge Prroduct Specification Small Size S Portablle uous Wo orking Continu Ca apacity Ratte Voltag ge Rate e 3 3P 30 0kW Re esolution n kw 10, 2 20 Volttage olling Contro oving Mo V 3P 50Hz/60Hz Switch Wh heel Worrking Po y We eight 220V V@50Hzz 1P 180 0kG Protecttion Dim mension n High Te emp. Short 500 0x1000x1200 L L*D*H Circuit, E-stop Donggguan Nengyi Eleectrical Technology Co., Ltd No 2, Youyi Roaad, Houjie Town n, Dongguan Citty, Guangdong Province, Chinaa nengyitecch@126.com Teel Ph

10 60kW VAC 3P Phase fo or Reacttive Loa ad Bank k Capacittive Loa ad bank k Page e 11 M Main Applicatio on Capacittive Simu ulation Switch, Contacttor Test eneratorr System UPS, Ge Prroduct Specification Small Size S Portablle uous Wo orking Continu Ca apacity Ratte Voltag ge Rate e 3 3P 60 0kW Re esolution n kw 5, 5, 10, 20, 20 Volttage olling Contro Mo oving V 3P 50Hz/60Hz Switch Wh heel Worrking Po y We eight V@50Hzz 3P 280 0kG Protecttion Dim mension n High Te emp. Short 850 0x550x L*D D*H Circuit, E-stop Donggguan Nengyi Eleectrical Technology Co., Ltd No 2, Youyi Roaad, Houjie Town n, Dongguan Citty, Guangdong Province, Chinaa nengyitecch@126.com Teel Ph

11 Load Bank Purchase How to order & Contact information Load Bank for AC & DC System Page 12 1 Ordering Information 1) Environment Indoor outdoor 2) P Active P KW Reactive P KVAR 3) P Factor or other 4) Voltage Alternating Current: 110V 220V 400V 690V 6.3KV 10.5KV or other Direct Current: 100V 200V 400V 600V 750V 1.0KV or other 5) Frequency 50HZ 60HZ 400HZ or other 6) Resolution KW; A; Ω 7) Connection 1phase2wires 3phase3wires 3phase4wires or other 8) Control Local Manual Local Touch Screen Remote Software or other 9) Blowing Down in, Up out Side in, Side out 10) Type Portable Stationary 2 Contact Information Tel.: Mol.: nengyitech@126.com Dongguan Nengyi Electrical Technology Co., Ltd No. 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China Web: Dongguan Nengyi Electrical Technology Co., Ltd No 2, Youyi Road, Houjie Town, Dongguan City, Guangdong Province, China