Road traffic signal systems Ingestion-build-189776 IEC 61951-1

IEC 61951-1

excluding austenitic or austenoferritic steels

Welding operators and co-ordinators

e) The bags of cement now supplied by the manufacturers have been halved in weight to 25 kg so mix calculations have been modified

The main changes in this British Standard from the previous edition take account of the following

Road traffic signal systems Ingestion-build-189776 IEC 61951-1BS 7987: 2001+A1: 2006 Road traffic signal systems BS 7987 is a standard that specifies requirements for Road Traffic Signal Systems, including their development, design, testing, installation and maintenance. In particular, it forms the electrotechnical part of the following two standards issued by CEN: BS EN 12368 Traffic control equipment Signal heads BS EN 12675 Traffic Signal Controllers Functional safety requirements Each of these standards