E-T-A has extended its product range with the introduction of the ESX10-TC electronic circuit protector for 12 V d.c. applications.
It is DIN rail mountable and enables optimum protection in combination with switch-mode power supplies and battery systems.
The space-saving device has a width of only 12,5 mm and is 80 mm in both height and depth. Its low power consumption makes it well suited to battery-buffered 12 V d.c. applications, for instance in solar technology. It is also suitable for applications in factory automation and test equipment in car manufacturing because it allows a consistent 12 V d.c. voltage platform for the test equipment to the actual motor control units. The circuit protector also features switchable load output, significantly minimising contact wear when switching on and off.
The ESX10-TC is DIN rail mountable, either individually or in groups mounted side by side. It offers a sophisticated busbar concept for line feed and zero potential. The rail terminal side of the housing has two small plastic slides which can be removed if required and can be slid into matching slots on the side to close off busbars. This reliably prevents mutual contact of different plus potentials.
The 12 V d.c. line entry as well as the load connection to protected plus and neutral are via screw terminals up to 10 mm² directly on the devices. The screw terminal is made of a high-strength copper alloy and had been designed in accordance with the patented Reakdyn principle to ensure reliable and safe cable connection.
The selective load protection with fixed current ratings from 1 A to 10 A ensures exclusive disconnection of the faulty path in the event of an overload or short circuit in the load circuit, without repercussions on the 12 V d.c. power supply. Thus it is prevented that a failure in a single load circuit causes a voltage dip which would have all loads connected to the switch-mode power supply fail and which – as a worst case scenario – might lead to a total system standstill.
The ESX10-TC limits the short circuit current to 1,3 to 1,8 times rated current and disconnects the faulty circuit after 100 ms. Inrush peaks, however, are tolerated, so that capacitive loads of more than 20 mF can be switched. In the event of an overload the circuit protector disconnects at 1,1 times rated current after 3 seconds and signals the failure to the control unit via an integral control output.
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