Generators Variable Speed Drives and Hire Options Quantum

Generators, Variable Speed Drives and Hire Options Quantum Controls Presentation Peter Stelling Sales Director

What do Generators have to do with Quantum Controls? Sizing of diesel generators is critical to avoid low-load or a shortage of power and is complicated by modern electronics, specifically non-linear loads.

What is a generator? A diesel generator is the combination of a diesel powered engine with an electric generator (often an alternator) to generate electrical energy Why would we use diesel over grid mains? • No mains available from grid • Temporary installation / application • Not enough power from existing mains grid supply • Loss of grid supply

Generators & Variable Speed Drives Have you the right size? Generating sets are selected based on the electrical load they are intended to supply, the electrical loads total characteristics (k. We, k. VA, var's and Harmonic Content including starting currents (normally from motors) and non-linear loads. Sized too small…. . Generators stall’s, trips on overload and Ultimately will not power the application Sized too big. . . Look what the experts say!

Generators & Variable Speed Drives n Does size matter…Yes!! n Diesel engines should be run at least 60% to 75% of their maximum rated load. Short periods of low load running are permissible providing the set is brought up to full load, or close to full load on a regular basis. n Why? Internal glazing and carbon build up is due to prolonged periods of running at low speeds or low load n Such conditions may occur if the engine powering the set is over-powered for the load applied to it, causing the diesel unit to be under-loaded, or as is very often the case, when sets are oversized to accommodate a motor starting peak current

So back to the motors!! n How does over sizing occur and how do we size a generator for motor starting? Normally: n DOL Starting = up to 7 x Peak full load current n Star delta = up to 6 x Peak full load current n Auto TX = up to 5 x Peak full load current n Soft start = up to 4 x Peak full load current So with a DOL motor starter rated at 110 KW a generator set rated to approximately 850 Kva would be required Motor absorbed running = 150 Kva approximately Result = Generator is oversized by 80%

VSD Control & Implications n Motor control using variable speed drives will typically give you 100% torque from zero speed and as the unit controls frequency rather than voltage then most motor applications such as pump, fan etc. can be started within the full load current of the motor. n Generator sizing can be vastly reduced to match the maximum required power the drive requires for the load n Low harmonic option drives to further reduce sizing of generator sets from Quantum Controls Ltd

VSD V’s DOL n So to compare to the DOL example: n 110 KW VSD motor starter, a 200 Kva generator could be used n Motor absorbed running = 150 Kva approximately Generator oversized by 25% (should be run at least 60% to 75% ) Sizing is acceptable: Generator size reduction V’s DOL = 75% reduction

Would you power this? Low power requirement car With this amount of power?

Only if you want to end up in trouble!!

So why would we power this? 22 KW Fan Motor with DOL Control With this oversized generator set. .

We worry about mpg, so why not fuel per k. Wh? n A generator typically will use between 0. 28 to 0. 4 litres of fuel to per KWH n Fact – A larger generator set will cost you more to run, bigger the engine the more fuel it consumes! n More space to store n More CO 2 Used n More generator rental costs

Here Is a typical saving example n 110 KW DOL Motor with an 850 Kva set example: n Per hour operation = 110 KW x 0. 4 litres of fuel = 44 litres of fuel per hour n 44 litres x 70 p per litre (approx. ) = £ 30. 80 p per hour to run n CO 2 = 61 kg per hour n Rental cost for set of approximately £ 950 per week

Here Is a typical saving example n 110 KW VSD Motor with an 200 Kva set example: n Per hour operation = 77 KW x 0. 28 litres of fuel = 21. 56 litres of fuel per hour n 21. 56 litres x 70 p per litre (approx. ) = £ 15. 09 p per hour to run n CO 2 = 43 kg per hour n Rental cost for set of approximately £ 450 per week

Here Is a typical saving example n So the summary of savings: VSD V’s DOL n Per hour operation = 33 KW of power saved n Litres x 70 p per litre (approx. ) = £ 15. 71 p saved per hour to run n CO 2 = 18 kg per hour saved n Rental cost for set of approximately £ 500 per week

Here’s a typical guide from QC QUANTUM CONTROLS HIRE FLEET SERVICES GENERATOR SIZING ON VSD APPLICATION BASED ON 415 V DIRECT ON LINE AND STAR DELTA GENERATOR SIZING RECOMMENDED IS ALSO SHOWN FOR COMPARRISON VARIABLE SPEED DRIVES POWER RATING 500 KW 400 KW 315 KW 250 KW 200 KW 160 KW 110 KW 90 KW 75 KW 55 KW 45 KW 37 KW 30 KW 22 KW 18. 5 KW 11 KW 7. 5 KW 5. 5 KW 2. 2 KW CURRENT RATING 880 AMPS 720 AMPS 560 AMPS 521 AMPS 360 AMPS 316 AMPS 216 AMPS 170 AMPS 147 AMPS 112 AMPS 85 AMPS 76 AMPS 56 AMPS 47 AMPS 37 AMPS 24 AMPS 17 AMPS 12 AMPS 5 AMPS VSD GENERATOR SIZE RECOMMENDED KVA 700 KVA 600 KVA 450 KVA 300 KVA 250 KVA 200 KVA 125 KVA 120 KVA 80 KVA 75 KVA 60 KVA 50 KVA 40 KVA 30 KVA 20 KVA 15 KVA 10 KVA 7. 5 KVA DOL START GEN SIZE 4000 KVA 3500 KVA 2700 KVA 2100 KVA 1800 KVA 1500 KVA 850 KVA 750 KVA 500 KVA 360 KVA 300 KVA 250 KVA 180 KVA 120 KVA 90 KVA 60 KVA 50 KVA STAR/DELTA GEN SIZE 2100 KVA 1800 KVA 1350 KVA 1050 KVA 900 KVA 750 KVA 550 KVA 375 KVA 360 KVA 240 KVA 225 KVA 180 KVA 150 KVA 120 KVA 90 KVA 60 KVA 45 KVA 30 KVA 25 KVA

What else can we offer? The latest new technology from The UK’s largest VSD, motor and Power options hire fleet Fractional to 1500 KW, 240 V to 11 Kv as standard Not just motors we control but power Supplies too. . How?

Power Supplies: n As an example; Client requires: 200 Kva at 3, 300 V variable frequency 0 -70 Hz supply is required on a test rig from a 415 V generator supply n How do we do it? We can offer: 415 V 250 Kva generator → 250 Kva 415 V VSD → 250 Kva sine filter → 415/3300 V 250 KVA TX → 250 Kva @ 3300 V variable frequency supply with a clean wave form and voltage stabilisation capabilities Result = a medium voltage variable frequency supply at low voltage pricing!

Our Newest panels. . IP 65 VSD 400 KW

What can we Hire? n n n n n Variable speed drives IP 65 rated Soft start panels IP 65 rated AC motors up to 500 KW Motor control starters Diesel Generators Mains cable Flow meters Switchgear UPS Turn key solutions

So what is your best practice? Lower cost diesel power: Lower CO 2 Lower running costs Lower rental rates Smaller generator sets Higher voltage at lower costs Wider supply range A viable solution A one stop solution Use Quantum Controls VSD

Confused? Ask us… Quantum Controls have hired VSD units over 10 years with an unrivalled fleet of units We have won 3 national energy reduction awards in last two years, all evolving around hire trials How can you hire 24/7/365 Call 0330 900 0247

Quantum Controls Ltd