Withdrawable diode rectifier offers compact solution to traction substations

ABB extends its ENVILINE range of diode rectifiers with a compact withdrawable unit for new-build or retrofitting to trackside substations.
September 20, 2016 –A withdrawable diode rectifier for installing into compact spaces within traction substations and which significantly reduces maintenance time and costs, is launched by ABB at InnoTrans 2016, 20 - 23 September, Berlin.

ENVILINETM WDR diode rectifier is the latest addition to the company’s solutions for DC wayside infrastructure, converting alternating current into direct current. Withdrawable diode rectifiers are used to provide DC traction power to trams, streetcars, light rail, metros and trolleybuses.

The WDR offers the same functionality of a traditional traction diode rectifier (TDR), with the difference that the diode modules are installed on a removable trolley, accessible from the front of the unit.

The rectifier's cabinet contains two withdrawable trolleys, each of which contain 12 or 18 diode modules, fuses and other protection devices. The 800 and 1000 mm width cubicles – which can be connected in parallel – are of a modular construction and are available in 6- or 12-pulse with output voltages of 750 VDC or 1500 VDC. Transformer-rectifier connections are aligned for ease of installation. A range of safety options include a door locking system, diode temperature monitoring, DC current and voltage measurement and ground fault relay.

With front access, the rectifier can be positioned against the wall making it suitable for retrofitting or as part of a new, smaller substation design. The withdrawable trolley also reduces maintenance time and costs as it can be rapidly replaced, thereby shortening any power outage.

The modular, building block approach using standardized modules speeds up procurement and delivery at a competitive price.

ABB (www.abb.com) is a leading global technology company in power and automation that enables utility, industry, and transport & infrastructure customers to improve their performance while lowering environmental impact. The ABB Group of companies operates in roughly 100 countries and employs about 135,000 people.