Product launch - Built-in Digital Monitoring and Controlled Switching

This new Alstom Grids point-on-wave switching controller, RPH 3, offers an electronic alternative to conventional solutions with increased security and protection of the electrical equipment. It can be used for configuration, monitoring, data logging and diagnostics. It provides a more reliable way of stopping transient over voltages from damaging networks than traditional devices. Traditionally, circuit breakers have been equipped with closing resistors to minimize the level of over voltage generated during closing or re-closing operations. This solution is expensive because a lot of equipment has to be installed and secondly it is inherently less reliable since its mechanical parts can be affected by external disturbance such as severe climatic conditions.  RPH 3 reduces the stress create by switching operations caused by lightning strikes and transient surges. It is suitable for protecting circuit breakers and transmission circuits from 362 kV power networks and above and can be applied to closing and auto-reclosing of uncompensated or shuntcompensated transmission lines as well as dual switching of high voltage lines and transformers.  RPH 3 uses sophisticated algorithms and fast digital signal processing to close contacts in under a millisecond, when the voltage across the breaker is close to zero. It increases reliability, requires less maintenance, is very easy to install and is smart grid ready (fully IEC 61850 compliant) with its integrated web server.  RPH 3 fully supports the optimization of the customers network design, operation and maintenance and reduces the total cost of ownership.

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