Powerbox announces the introduction of its ENR1000-PC series precharger unit designed to deliver peak power to high capacitive loads in railway applications. The precharger converts the battery nominal bus voltage of 50VDC up to 137.5VDC to a regulated output voltage of 400VDC or 600VDC to charge high voltage capacitor banks used to switch electric valves actuators such as for unlocking and lifting pantographs. The ENR1000-PC series delivers a peak power of 1000W, is able to charge a load of 5 to 35mF in two seconds and automatically switches to standby mode when charging is completed.
The series comprises two models: the ENR1000D110/400-PC is delivering 400VDC is able to charge a capacitance load of 5 to 35mF. The unit sustains a maximum voltage of 137.5VDC, a 154VDC transient voltage and an external output reverse voltage of a maximum up to 5.8kVDC.
The ENR1000D110/600-PC is delivering 600VDC to 10 to 12mF capacitive loads. The unit sustains a maximum voltage and transient of 130VDC and an external output reverse voltage of a maximum up to 2.5kVDC.
The ENR1000-PC series includes overvoltage, overload, short-circuit and thermal protection.