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Requirements for Switchroom/Substation

  • Requirements for Switchroom/Substation

     

    (1)  Facilities for locking

    Every switchroom  or  substation  should  have  suitable  means  of entrance/exit, which should be so arranged as to prevent unauthorised  entry but give authorised persons ready access at all times. For the purpose of preventing unauthorised  entry, or access to low voltage installations, the display of suitable warning  notice is acceptable provided that the equipment  is not readily accessible to the general public.  In the case of high  voltage installations, locked enclosure with suitable warning  notice should be provided.

     

    Where  an entrance or exit of a switchroom/substation is provided with locked doors or gates, the arrangement  of the lock should be such that it requires a key to open the door or gate from outside.

     

    Every  high   voltage   (H.V.)  switchroom/substation,  except  when manned,   should  be  kept  locked.  A  duplicate  key for  each  H.V. switchroom/substation should be available, for emergency purposes, in a key box at a designated location. All other keys for use in the H.V. switchroom/substation should  be kept under the control of a responsible person.

     

    Exceptionally, a key may be held by a person whose duties require him  to have frequent  access to an H.V. switchroom/substation. In such a case, that person should obtain a written authorisation from the responsible person stating the duties for which  the person is required to hold the key.

     

    (2)  Arrangement of entrance/exit

     

    Every switchroom  or  substation  should  have  suitable  means  of entrance/exit, which should be so arranged as to prevent unauthorised  entry but give authorised persons ready access at all times. For the purpose of preventing unauthorised  entry, or access to low voltage installations, the display of suitable warning  notice is acceptable provided that the equipment  is not readily accessible to the general public.  In the case of high  voltage installations, locked enclosure with suitable warning  notice should be provided.

     

    Where  an entrance or exit of a switchroom/substation is provided with locked doors or gates, the arrangement  of the lock should be such that it requires a key to open the door or gate from outside.

     

    Every  high   voltage   (H.V.)  switchroom/substation,  except  when manned,   should  be  kept  locked.  A  duplicate  key for  each  H.V. switchroom/substation should be available, for emergency purposes, in a key box at a designated location. All other keys for use in the H.V. switchroom/substation should  be kept under the control of a responsible person.

     

    Exceptionally, a key may be held by a person whose duties require him  to have frequent  access to an H.V. switchroom/substation. In such a case, that person should obtain a written authorisation from the responsible person stating the duties for which  the person is required to hold the key.

     

    (2)  Arrangement of entrance/exit

     

    At least one exit of a switchroom/substation should open outwards and this emergency exit should be identified clearly.

     

    Conductors near the entrance/exit of a switchroom/substation must be  so arranged  or  protected  that  there is no  risk of  accidental contact of any live metal by any person entering or leaving

     

    In  order  to  provide  free  and  ready  access at  all  times  for  the maintenance  and  operation  of the electrical equipment  contained in  a switchroom/substation,  every entrance/exit of  a switchroom/ substation should be kept free of any obstruction includingム

    (i) locking  facilities other  than  those in  accordance with  para- graph (1);

    (ii) structures/goods/materials and

    (iii) litter or waste,

    which  impedes  the  access to  the  switchroom/substation  from  a public area.

     

    (3)  Illumination  and ventilation

     

    (a)   Suitable lighting  giving  a minimum illumination level of  150  lux measured  at  floor  level  in  each  switchroom/substation  and  an average vertical illumination level of 120  lux minimum should  be provided to allow  for the proper operation of electrical equipment. Where electrical equipment  in the switchroom/substation is required to be operated in case of mains power failure, adequate emergency electric lighting  independent  of the mains  supply and  capable of operation for a minimum period of 30 minutes should be provided. Additional  lighting  should  be provided  during  maintenance  if only the above minimum level of illumination is provided

     

    (b)  Suitable ventilation or air-conditioning should be provided so as to prevent the development  of high  ambient  air temperatures around the electrical equipment  in  excess of  those permissible  for  such equipment.

     

    (4)  Prohibition of storage

     

    Switchroom/substation, other than the tools used for the operation and maintenance  of the switchgear inside it, must not be used for storage purposes

     

    Reference: Code of Practice for the Electricity (Wiring) Regulations 2015 Edition

Comments

1 comment
  • Chet Allman
    Chet Allman https://lnkd.in/dUgsmJR
    November 19, 2019

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