The SVS09 system approach offers clear advantages for the manifold requirements of measuring and controlling in a power plant with its thousands of transducers and valves which have to be embedded systematically, rationally and safely into the control and communication system. The SVS09 allows cascading several 10-way distributors to the master-slave-principle and is therefore ideally suited to comprehensive protection concepts where a great number of I/O units and transducers can be involved in the end protected against overcurrent. The master-slave-principle offers the possibility - in addition to single alarms – to combine group signalling for logical functional groups on the field level.
The plugged-in circuit breaker trips in the event of overload or short circuit and the SVS09 master unit will create a group signal for itself and all assigned slave units which will be acknowledged directly in the control cabinet or peripherally in the block control room. After remedy of the failure the circuit breaker will be manually reset and the group signalling function will in the meantime be again ready for use. The signalling logic is fitted in a plug-on type signalling module and features a stable relay technology unsusceptible to ESD. The compact SVS09 is track-mountable and with a width of only 140mm it accommodates ten circuit breakers of the thermal-magnetic series as well as the electronic series with integral current limitation. Mounting, wiring and system enhancements are child’s play due to the spring-loaded terminals and loop-through terminals for the DC24 V supply and reduce space and wiring requirements in the control cabinet to a minimum. Last but not least the combination of rational wiring, selective protection and reliable signalling of the SVS09 is the best foundation for easy and systematic trouble-shooting and thus enhances system availability.