Parallel switchgear provides back-up power when utilities fail
Back-up power is provided during a utility power loss by the emergency power system developed by Russelectric, a Siemens business. The paralleling switchgear systems offer redundant programmable logic controller (PLC) controls and manual back-up capability.
The power system is suitable for use in hospitals, data centres, telecommunications and banking facilities, as well as airports, water and wastewater treatment plants, and renewable energy facilities, said Russelectric.
The company custom designs and manufactures systems which are UL listed. Systems can incorporate control functions as peak shaving and load curtailment. The paralleling systems also incorporate dual, redundant, hot synchronised PLCs for system control. The system design allows manual start and synchronisation of generator sets if automatic controls malfunction. Discrete switches, meters and control devices are standard and allow manual control capability in the event that both system PLCs fail.
The systems are supervisory control and data acquisition (SCADA)-capable and include a 23-inch LCD HMI touchscreen display which enables operators to view system one-line diagrams, alarms and setpoints.
Load demand sensing determines the number of engine generators in operation. The system permits first priority loads to transfer to the connected engine generator set, while delaying the transfer of lower priority loads until additional generator capacity has been connected. Lower priority loads then transfer to the emergency power system as generator sets are added to the bus.
Founded in 1955, Russelectric, a Siemens business, provides high integrity power control for mission critical applications in the healthcare, information technology, telecommunication, water treatment, and renewable energy markets. The company maintains vertically integrated manufacturing facilities in Massachusetts and Oklahoma, USA, where it designs and builds a full line of automatic transfer switches, switchgear, and controls.
Siemens Smart Infrastructure (SI) provides customers with products, systems, solutions and services from the point of power generation all the way to consumption.
Siemens Smart Infrastructure has its global headquarters in Zug, Switzerland, and its US corporate headquarters in Peachtree Corners, Georgia, USA.
