Why flexible expansion joints are used in IPBD?

Why flexible expansion joints are used in IPBD?
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1 Answer

Answer :

To cater thermal expansion and contraction due to heating and to eliminate mechanical vibrations to the equipment. 
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Related questions

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Last Answer : a) Physical inspection of bus for any spark or overheating or discoloration. b) Physical inspection of copper braided flexibles for discoloration. c) Physical inspection of inspection window gaskets, seal off ... Tan-delta test of IPBD m) IR value measurement n) Cleanliness checks entire IPBD. 

What are the torque settings used in IPBD connection?

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Last Answer : M12 (Nut bolt) 4506 100 kg-cm or 55 NM M16 (Nut bolt) 9006 250 kg-cm or 80 NM M20 (Nut bolt) 18006300 kg-cm or 100 NM 

What are the isolations required for working on IPBD/ Generator?

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Last Answer : a. Generator field breaker open and tagged. b. GT breaker open and earth switch closed.  c. Barring gear motor stopped and tagged. d. Generator PT's isolated and tagged. e. CB 472 and CB 474 open ... 's are isolated and tagged. f. Before doing any work on brush gear 64F1 relay to be taken out. 

What is the protection for IPBD?

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Last Answer : Generator – GT overall differential protection.  

What is use of hot air blower in IPBD?

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Last Answer : To remove moisture and to prevent moisture condensation inside the duct at commissioning time or in long shutdown periods. 

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Description : Why seal-off bushings are used in IPBD?  

Last Answer : To prevent interchange of air at different temperature and leakage of hydrogen or infiltration of dust into the bus duct. 

Why aluminium bus bars are silver-plated in IPBD?

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Last Answer : Aluminium bus bars are silver-plated at flexible connection to prevent the galvanic corrosion ant also for low contact resistance. 

Why neoprene rubber bellows are used in IPBD?

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Last Answer : Neoprene rubber bellows are used near the terminals of the equipment and also at building wall from indoor to outdoor area to allow thermal expansion and to minimise vibrations. 

What are the salient features of IPBD?

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Last Answer : a. This for a vital link between generator, GT, UAT, SPPT, SET and neutral grounding transformer. b. The continuous enclosure operating at ground potential limits the leakage flux outside the enclosure ... maintenance is nil. j. Separate parts erected IPBD. Hence changing parts makes it easy. 

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Last Answer : Non-magnetic stainless steel nut and bolts are used in IPBD to restrict magnetic effect at joints.  

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