New Industry Products

Powerbox Introduces Precharger Solution for Railway Applications

October 05, 2018 by Powerbox

This article highlights Powerbox ENR1000 PC series precharger unit designed to deliver peak power to high capacitive loads in railway applications.

ENR1000 PC is an intro series of Powerbox precharger unit designed to deliver peak power to high capacitive loads in railway applications. This unit converts the battery nominal bus voltage of 50VDC up to 137.5VDC and to a regulated output voltage of 400VDC or 600VDC.

This power conversion charge high voltage capacitor banks is used to switch electric valves actuators such as for unlocking and lifting pantographs. 

The series delivers a peak power of 1000W that is able to charge a load of 5 to 35mF in two seconds and automatically switches to standby mode when charging is completed. It is part of PRBX’s Enhanced Rail Power Solutions (PRBX-ERPS).

Within operating input voltage range as wide as 50VDC to 137.5VDC, the ENR1000-PC series is covering the 72V, 96V and 110V system voltages according to EN50155.

The series comprises two models:

  1. The ENR1000D110/400-PC delivers 400VDC and is able to charge a capacitance load of 5-35mF. 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.
  2. The ENR1000D110/600-PC delivers 600VDC and is able to charge a capacitance load of 10-12mF. 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.

Designed for indoor and outdoor applications, the ENR1000-PC series can be operated within a wide range of temperature from -40 to +70 degrees C and EN50155 temperature class TX and up to +85 degrees C in storage conditions.

The precharger unit is designed according to EN50155, EN50124-1 and IEC61287-1. Its secondary to ground and primary to secondary insulation resistance is up to 8.5kVDC, and its primary to ground is 1.5kVDC for one minute.The clearance and creepage distances are designed in accordance with IEC664, and the overvoltage achieves category II with a pollution degree II rating. The ENR1000-PC series belongs to material group IIIa, CTI 175-400.

The ENR1000-PC series is designed in accordance to EN50155 EN50121-3-2 and EN50121-5, ESD to IEC61000-4-2 and IEC62236- 3-2, fast transient immunity to IEC61000-4-4 and IEC62236-3-2, surge to EN61000-4-5 and IEC62236-3-2, practically built for demanding railway applications and EMC environments.

The precharger is built in a metal case of 229 x 184 x 86mm. Input connection is via a standard H15 connector, and the output is via threaded shafts or high isolated cables on request. The unit weighs a maximum of 2.5 kg.


About Powerbox

Founded in 1974, with headquarters in Sweden and operations in 15 countries across four continents, Powerbox serves customers all around the globe. The company focuses on four major markets – industrial, medical, transportation/railway and defense – for which it designs and markets premium quality power conversion systems for demanding applications. Powerbox’s mission is to use its expertise to increase customers’ competitiveness by meeting all of their power needs. Every aspect of the company’s business is focused on that goal, from the design of advanced components that go into products, through to high levels of customer service. Powerbox is recognized for technical innovations that reduce energy consumption and its ability to manage full product lifecycles while minimizing environmental impact. Powerbox is a Cosel Group Company.


This article originally appeared in the Bodo’s Power Systems magazine.