The WITT EscS 6 (EKS8) is an auto-resetting earth short-circuiting device after DIN VDE 0115 part 300 and part 320. Parameter driven and to survey tension differences between return conductor and the earthing. The Combination of anti-parallel arranged thyristors and a power contactor guaranties a low shuttering time and a high ampacity. This device is built in an especially compact design.
There are dangers with stray currents due to the straight connection to the return conductor with the earthing by a rail system with a DC traction, which need to be prevented. Stray currents could damage buildings, bridges and other metallic (electrically conducting) facilities and parts of them via corrosion. Danger also evolve through improper contact voltage. A temporary short-circuit is one action to protect people against improper contact voltage (DIN EN 50122-1, VDE 0115 part 3).
If the set voltage curve is exceeded, the earthing short-circuiting device reacts. That means that if the criteria are fulfilled, the thyristors and the contactor will be ignite at the same time. The thyristors switch in microseconds, the contactors have a shuttering time of about 90 ms. By ignition of the thyristors the tension will collapse to little voltage. The thyristors stay ignited until the closing of the contactor with the help of contactors position of auxiliary contacts will be identified. Afterwards the thyristors will be cleared, and the contactor adopt the load.
The Witt EscS 6 (EKS8) is built on two channels in its essential modules and has self-test functions. Thereby, malfunctions are very rare and reported directly if they occur.
Witt Solutions GmbH provides different power monitoring systems for the respective task - DC voltage monitoring, monitoring cable systems, short-circuit systems...
The WITT EPM 4 measurement device monitors the potentials of the connected grounds and evaluates the occurring voltages.
The SAM device monitors the surge arrestor (SA) within a certain railway section and reports broken ones via an integrated GSM-Modem.
The WITT EPM 3 measurement device monitors the potentials of the connected grounds and evaluates the occurring voltages.
The WITT TVM 4 device monitors the driving voltage of individual sections and supplies information about the voltage values.
WITT CM 3 is a self-resetting cable monitoring device for the detection of cable errors. Between signal and triggering a time delay of 4.8 sec is integrated.
WITT CM 4 is a self-resetting cable monitoring device for the detection of cable errors., used for insulation monitoring of cable systems in DC Systems.
The WITT EscS 7 is an auto-resetting earth short-circuiting device that accords to EN 50122 regulations for the protection of public and infrastructure.
Use the form opposite to get in touch with Witt Solutions GmbH directly to discuss any requirements you might have.