VRIOGS 010.3 RevA - Public Transport Victoria

VRIOGS 010.3 Revision A 27maintained by a 5 to 95 percentile person.e) Safe and unrestricted access to all parts of equipment whereoperations and settings have to be carried out.f) Safe and unrestricted access to all maintainable parts for inspectionand maintenance.8.11 SAFETY CLEARANCESClearances from electrical equipment, to other electrical equipment, to building walls,switchyard fences and other equipment shall be at least to AS 2067.In addition, sufficient clearances to allow for initial construction and futuremaintenance, operating and earthing as outlined below shall be observed:a) At least 900mm from rear of metal clad switchgear to walls. Thisspace shall be sufficient to allow for maintenance and inspections bypersonnel.b) There shall be sufficient space at the front of the metal clad switchgearto easily and comfortably carry out any inspections and routinemaintenance recommended by the manufacturer. For example thereshall be sufficient space in front of the DCCBs to rack in and out thecircuit breakers. There shall also be additional space for manoeuvringof the circuit breaker earthing truck by a person.c) A break of at least 900mm in a metal clad switchgear bus, or analternative means of egress, where it is considered that the totalassembled length of the bus may present a hazard to the operators.d) The minimum clearance between the metal clad 1500V DC CircuitBreaker Bus and any earthed structure shall be 2000mm.e) The minimum clearance between the metal clad 1500V DC circuitbreaker that is in the isolated position and AC circuit breakers that hasbeen racked out shall be 2000mm.f) At least 1200mm of unobstructed space between equipment (otherthan cable trays, cables and cable terminations) to ceiling lining orgreater if so stipulated by equipment manufacturers.Any deviation from these clearance requirements shall be subject to the approval ofthe Department.8.12 MAINTAINABILITY8.12.1Maintenance requirements are determined during the detailed design process. Thedesign of the Substation, the equipment selection and layout of equipment shall besuch as to permit ease of maintenance and emergency repairs.NOTE:This document is controlled only when viewed on the DOT Engineering Standards website.Any other copy of this document is uncontrolled, and the content may not be current.