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21-07-2020
North Central Railway using “Head on Generation (HOG)” in 16 LHB rakes to save 75000 liters HSD annually

North Central Railway

Headquarter

Public Relations

Prayagraj

 

No. 11PR/07/2020Press ReleaseDate: 18.07.20

 

North Central Railway using “Head o­n Generation (HOG)” in 16 LHB rakes to save 75000 liters HSD annually

 

“Test Switch” for HOG -Innovation by Kanpur Electric Loco Shed for reliability improvement of HOG system in locomotives

 

Conventionally trains with LHB coaches have two generator cars at both end of rake to meet power demand of coaches for lighting, fans, air conditioning and other o­n-board equipment. However, these HSD based DG sets consume substantial diesel besides occupying large space and operation is not eco-friendly and generates noise at platform.

 

To overcome this limitation of LHB design coach, power supply arrangement to coaches throughlocomotive has been made, called “Head o­n Generation” (HOG). Under this arrangement part of traction energy from 25000 Voltsoverhead wire(OHE) is stepped down using transformer and converter at 750 volts to meet power need of LHB coaches. Power couplers connecting each coach is also connected to locomotive and ensures electricity supply to run fans, lights, ACs and other o­n-board equipment without need of running diesel generator. Withreduced requirement of o­n-board DG set, released space in power car cum guard van can be used for making compartment for differently abled person and additional space for parcel. Such coaches are already under manufacture by railway coach factories and expected in service very soon.

 

North Central is leading Railway in use of HOG technology and 16 out of total 17 primary LHB rakes are HOG compliant and saving 75000 liters diesel annually through reduced running of DG sets.Similarly,41 locomotives of North Central railway are fitted with HOG convertor to cater all HOG rakes in different primary train o­n NCR including Prayagraj, Shramshakti, Humsafar, Shatabdi, Chambal,etc.

 

With power supply arrangement in HOG rake from locomotive it is utmost important that HOG system of rake and locomotive are fully functional and free from defect to avoid any detention and inconvenience to passengers. Since locomotive and coaching rakes are maintained at different locations hence combined testing of HOG system is possible o­nly when locomotive is attached to rake and in case of any defect chances of train getting late increases.

 

To overcome this constraint an innovative solution has been found by Electric locomotive shed Kanpur through provision of “test switch” in HOG circuitry which bypasses need of rake being attached to loco to test functioning of HOG convertor. Through this innovative arrangement now locomotive HOG system can be tested independently thus any possible defect can be rectified in time.

This innovation by maintenance engineers of NCR is part of coveted 20 items list of “Good Work” issued by Railway board selected from 2645 entries. NCR is leading Zonal Railway with 08 items in total 20 “Good works” identified by Railway Board for wider implementation.

 





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