Contacts in Circuit

 Number of contacts in a circuit shall not exceed 45 Nos,due to voltage drop consideration.The voltage across R1 & R2 of a relay shall not be less than 22 V.

Comments

Post a Comment

Popular posts from this blog

CRS , CST and PCE sanction

  Validity of CST sanction   is six months .Required when we are doing any changes in existing interlocking.e.g commissioning of BPAC Validity of CRS and PCE sanction are same (01 year). PCE sanction is required only for closing the LC gate.Earlier it was with CRS, now delegated to PCE. ESP,SIP,SWRD,PD and SWR required to be attached with PCE sanction.  CRS sanction is must when do any change in interlocking,e.g.any new line is opened. Validity of CRS sanction is 01 year. CRS permission is required in following cases. a) Additions/extensions or alterations to the existing block, Signalling and interlocking installations b) Change in Block, Signalling and Interlocking installations. c) New stations temporary or permanent. d) Interlocking of level crossings, catch siding and slip sidings etc. CST Sanction   CST Sanction required in following works 1) Provision of Telephone at already Manned level crossings. 2) Provision of electrical & mechanical lifting barrier including emergency
Read more

Catch Siding and Slip Siding

  Catch Siding is provided to protect the station section, if the gradient is steeper than 1 in 80 falling towards the station section. Slip Siding is provided to protect block section if the gradient is steeper than 1 in 100 towards Block Section. Normal permissible gradient for Block Section is 1:1200 and for Station Section is 1:400. Reception of Trains in Catch Siding Stations- (a) Either a minimum of two Stop Signals shall be provided in rear of the Catch Siding points or the First Stop Signal shall be at an adequate distance equal to Block overlap from the catch siding points. (b) A train shall first be brought to a stop at the First Stop Signal, before the Catch Siding points are set for the main line and the reception signals shall not be taken 'OFF' unless the following conditions are satisfied. (1) The line on which the train is to be received is clear and the train is to be received on the main line.  (ii) The points leading to the Catch Siding as well as all the Poi
Read more

Railway Establishment and Stores

  Max LAP approved one time - 180 days .( if available in his account). Max LHAP approved one time - 24 months ( if available in his account). Leave not due - Max 360 days in service. Can be sanctioned on medical grounds  Compensatory casual leave granted to Group C &D employees other than supervisory staff for attending on Sundays and holidays. Special casual leave    It is sanctioned for participation in sporting events/events of national importance,for scouting duties and family welfare. Special casual leave can be granted in following cases. Administration of operative society members. Participation in scouts . Participation in sports activities  Participation in railway union activities etc In bandh,curfew and national calamity. A railway Servant,who has taken CL for half a day on the afternoon of a working day due to unexpected sickness or compelling grounds and he has no CL at his credit, may as an exception to general rule,be permitted to combine half a day’s CL with regu
Read more