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Need help with equipment selection

Created by: woosterstring at: 3/16/2013 4:45 PM (2 Replies)

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3/16/2013 4:45 PM	Rate (0)
woosterstring Posts: 1 Rating: (0)	Hello guys need your advice. I have two three-phase generators – one with power about 20 kW, and other with bigger power (about 50 kW). But I always must use the bigger one because of phase unbalancing near 40-50% (which I could not correct for lots of reasons). From my calculating, for all loads smaller generator is quite enough. So, what I need is a device for balancing three-phase system to reduce cost of fuel, etc. Are there some systems from Siemens that will do the job? Anyway, all references and suggestions should be helpful.
woosterstring Posts: 1 Rating: (0)
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6/20/2013 6:13 AM	Rate (0)
Vithani Platinum Member Joined: 7/8/2009 Last visit: 8/5/2024 Posts: 1976 Rating: (477)	well i dont think there will be any device which can correct load balance Unbalance you mentioned is very very high You must take major steps to correct load distribution. This may turn in to high in terms of time and cost, but it will be helpful for future, and increase in life of Generator and other equipments Regards, Devesh Vithani
	I dont Like people driving Fast, thats the reason I overtake them ;)
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6/24/2013 6:57 AM	Rate (1)
Valli Posts: 262 Rating: (45)	Hi, Siemens provides a few products, the combination of which can help you in acheiveing the perfect load balancing:- 1) Since, you have two Generators you can keep them connected via a Controller ( S7- 1200 CPU ) when i say connected i am Not referring to DG synchronization. 2) You have to use a few PAC 3200 (energy meters). Control philosophy will as follows:-1) PAC 3200 energy meters shall be placed in the outgoing of DG i.e. just above the LT ACBs/ MCCBs installed.2) Both the PAC 3200 shall provide vital power quality data to S-1200 directly on Ethernet.3) Power Quality data will include THD, Unbalance, Limits of Voltage and Frequency.4) All the switching devices like ACBs/ MCCBs etc should be used Electrically operated and must have 1NO contact/ Trip Signaling switch & a Shunt coil.5) S-7 1200’s Digital input will be connected with ACBs/ MCCBs in the below fashion - NO contact of Device will send ON/ OFF information to S-7 1200 - Trip signaling switch of device will send Trip status of device. - based on Power Quality or time S-71200 will switch ON/ OFF the ACBs/MCCBs through the Digital outputs which are connected with its motorized mechanism and shunt coil repectively.6) You can use Sentron Power Manager software for Monitoring all these operation on line and can get the cost centre wise reports also to analize.7) In Sentron Power Manager, there is one screen which is known as Load Management/ Monitoring. These things will help you in optimizing your operating cost. Attachment Powermanager_Screenshots.pdf (820 Downloads)
Valli Posts: 262 Rating: (45)
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