IEEE C37.20.1b-2006 PDF

This amendment addresses additional requirements of auxiliary power wiring and control wiring within dc switchgear of traction power substations up to 3200 volts dc nominal output. This amendment provides control and power wiring methods for dc traction power switchgear intended to increase reliability of the operation of the equipment, improve protection, reduce maintenance cost and initial cost, and improve overall performance of the dc traction power switchgear. Amendment Standard - Superseded. This amendment addresses additional requirements of auxiliary power wiring and control wiring within dc switchgear of traction power substations with rated maximum voltage up to 3200 volts dc. This amendment provides control and power wiring methods for dc traction power switchgear intended to increase reliability of the operation of the equipment, improve protection, reduce maintenance cost and initial cost, and improve overall performance of the dc traction power switchgear.