VRIOGS 012.7.15 RevA - Train Protection Warning Systems - Public ...

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6 VRIOGS 012.7.15 Revision ASECTION 4.0OPERATING ENVIRONMENT4.1 Environmental Conditionsa) The TPWS shall comply with the category conditions specified in VRIOGStandard “Environment Conditions” VRIOGS 012.7.25.(i)(ii)(iii)The control modules shall be subject to the condition specified forCategory B4 equipment if housed in trackside enclosures.The control modules shall be subject to the condition specified forCategory B1 equipment if housed in relay rooms.The track mounted equipment shall be subject to the condition specifiedfor Category C equipment.4.2 Life Expectancya) The TPWS under those conditions specified in Section 3.1 of thisspecification shall have a minimum life expectancy of 25 years.4.3 Lightning and Surge Protectiona) The application of the TPWS equipment shall comply with VRIOG Standard“Lightning and Surge Protection - General Requirements” VRIOGS 012.7.9.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 be inaccurate.
VRIOGS 012.7.15 Revision A 7SECTION 5.0TECHNICAL REQUIREMENTS OF TPWSThis section of the specification outlines the minimum technical requirements to beconsidered for the design and manufacture of the TPWS.5.1 Electrical RequirementsPower Supply (Trackside):Inrush Current:Power Factor:Signalling Interface:Earthing Requirements:88 – 121V AC, 47 to 60Hz• 75mA typical for single function cabinet• 150mA typical for single signal enclosure• 300mA typical for four function doublesignal2.5A at 121 V AC typical0.88 at 88V AC to 0.78 at 121V AC110VAC energised when main stop signal lit< 4Ω• 3.5mA min• 5mA maxLoop Frequencies (kHz): F1 - 64.25F2 - 65.25F3 - 66.25F4 - 64.75F5 - 65.75F6 - 66.75Table 2 - Electrical Requirements5.2 Voltage Input Requirementsa) Each TPWS OSM or TSM shall be fed from an associated TPWS SIM.b) The SIM shall require the following inputs from the signalling system:-• 110V AC Power Supply;• 110V AC Main Input (normally permanent);• 110V AC Suppression InputNOTE: 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 be inaccurate.
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VRIOGS 012.7.15 RevA - Train Protection Warning Systems - Public ...

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