Surge arresters
Surge arresters for over voltage protection
About surge arresters
Plant availability is very important as even short failures in production may cause high losses in sales. Therefore respective protection of the devices e.g. surge protection as well as a high availability of plant parts needs to be ensured. Direct and indirect lightning as well as switching operations within a process can produce voltage overloads into supply lines and communication circuits, such as fieldbus systems.
Portfolio description
Our portfolio of surge arresters provides:
- Surge arrester for DIN rail mounting
- Surge arrester for field mounting
- Surge arrester for signal cables
- Surge arrester for communication lines of fieldbuses
- Surge arrester for power lines
Surge arresters are primarily used in process automation and in measuring and communication technology within the chemicals, pharmaceuticals, water and wastewater sectors as well as in the food industry.
©Endress+Hauser
Measuring principle
Surge arresters are used to protect electronic components in field devices from being destroyed. It ensures that overvoltage surges which occur in signal cables (e.g. 4 to 20 mA), in communication lines of fieldbuses (HART, PA, FF) and in power lines are safely passed into the ground. The functionality of the electronic component to be protected is not affected as, using the impedance-free connection of the protection unit, interference voltage drops cannot be introduced.
Benefits
- Optionally available with ATEX and SIL2 intrinsically safe approvals
- Surge arrester for field or DIN rail mounting available
- Surge arrester for power lines, signal cables and communication lines of fieldbuses available
- Increased plant availability as surge arrester is perfectly matched to the electronic components involved in process automation and process measuring technology
