BHARAT  HEAVY ELECTRICALS LIMITED, BHOPAL

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Development of new facility for Axle/Tacho generator

 

Bhopal, September 16,2005 : A newly developed facility for Axle/Tacho generator testing in TXM test plant was inaugurated the other day by GM(TPTN &CET) Shri S.C.Bhargava at Traction Division of BHEL, Bhopal. Shri S.K.Sharma , GM(TME), AGMs Shr G.D.Verma, Shri V.C.Parate and Shri V.Bhave and a number of employees were present on this occasion.

This testing facility has been developed in-house by Shri Sapan Chakraborty, Shri Shyam Lal Kachhaba and Shri R.K.Shrivastava of FNX Division entirely from internal resources and available material with active support and participation of the staff of TXM testing and EMX. This facility with thyristerized drive will reduce power consumption and noise pollution as well as increase the capacity of TXM test area. With commissioning of this facility BHEL,Bhopal would be saving approximately Rs. 12 lacs every year in this particular area.

BHEL Bhopal commissions 2*120KA rectifier equipment at M/s HEG, Mandideep

Bhopal, 14th September 2005: Control Equipment Engineering (SCR division) of BHEL Bhopal, in association with the active participation of the customer engineers, has successfully commissioned a 2*120KA, 200V DC rectifier system at M/s Hindustan Electro Graphite, Mandideep. This was the fourth such order for rectifiers executed for M/s HEG who are already equipped with BHEL Bhopal make rectifiers of 3*55KA (1977), 1*85KA (1986) & 1*120KA (1996) that are all performing satisfactorily. With this new order the customer once more reposed their faith on BHEL.

These large current rectifiers provide DC power to furnaces used for graphitization of carbon electrodes at HEG. The process involves feeding DC power based on a process dependent power profile wherein constant levels of power are fed to a furnace for fixed intervals of time. Each rectifier unit consists of 2nos. main rectifier cubicles with high current silicon diodes mounted on DM water-cooled aluminium heat sinks connected to an incoming HT AC line via a regulating transformer with OLTC and a rectifier transformer with transductors having variable voltage characteristic.

The control cubicles are equipped with state-of-art PLC based control to achieve the required time based constant power regulation, parallel operation of the two rectifiers with equal load sharing, semiconductor fuse failure monitoring, OLTC raise/lower operation, alarm annunciation, etc. This is the first rectifier installation supplied by BHEL Bhopal employing PLC based controls. The totally in-house effort by CEE engineers has thus been validated following the successful commissioning of the system.

An identical set-up of a 2*120KA rectifier system is under commissioning at M/s Graphite India Ltd, Durgapur. While one unit is already operational, the second unit alongwith parallel operation is due for commissioning shortly.

Order for another 120KA rectifier unit is currently under execution for M/s Standard Alkali, Mumbai.

BHEL, Bhopal now possesses the capability to supply large current rectifiers with state-of-art PLC based control technology. Starting from 1969, there are now more than sixty BHEL Bhopal make rectifier installations supplying about 1600MW of DC power to different industries in the field of chemicals, zinc, aluminium, graphite, etc.