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GREINER compensation systems
The reactive-power compensation system developed by Greiner in 2007 sets new standards in terms of durability, operational reliability and energy-saving.The cabinets can be operated without forced ventilation and with up to 280 kvar compensation capacity, either as an individual power factor correction unit or as a compensation cubicle in an MCC system.High-quality capacitors and reactors – all made in Germany – guarantee the necessary safety and extended durability of the components fitted here.In the event of a fault, the components are protected by specially selected capacity contactors in conjunction with 690 V fuses or, in specific instances, circuit breakers with high short-circuit strength.A possible reactor capacity of up to 14 % rounds off the equipment’s protection.The special arrangement of the components and design of the cabinet as a dual-chamber system with unbeatable spacing between heat-sensitive components and heat sources as part of an equally compact design allow maximum ambient temperatures of up to 40 oC to apply in the switchroom.The dual-chamber system is made possible by a modular construction where the heat-sensitive capacitors are located at the front and the reactors, physically separated by a partitioning panel, are exposed to the air stream in the rear section of the cabinet.This prevents the capacitors from being heated by the reactors.A thermal type test has been carried out to DIN EN 60439 - 1 to determine the different ambient temperatures in the front and rear flue, depending on the installation position.This demonstrated the flue effect which the configuration endeavours to create.A parallel measurement, taken when the equipment was fully connected, determined the mean THD (total harmonic distortion) during the temperature-rise test by means of a harmonics analysis of all three phases and the PEN conductor.
The power loss of the entire unit is minimised by using copper rails with larger cross sections, by avoiding looping of the conductors, by selecting suitable components and, in particular, by the low power loss of the reactors and by preferring direct paths.
If the pressure-relief device has been triggered, the capacitors can also be replaced quickly and with simple tools.Each individual capacitor can be released directly from the front and replaced without the module having to be removed.The system can be reconnected very quickly indeed.
Customers have a choice between fixed compensation and compensation with a 6-stage controller.