Surge arrester for high voltages
View Patent ↗An overvoltage arrester for high voltages having a high-voltage terminal that is connected to an arrester block forming a nonlinear resistor, and a temperature sensor for detecting the temperature of the arrester block. In order to enable a simple and reliable detection of the temperature of the arrester block continually during the operation thereof, the temperature sensor detects a change of the longitudinal extent of the arrester block.
1. A surge arrester for high voltages, comprising:
an arrester block forming a nonlinear resistance;
a high-voltage connection connected to said arrester block; and
a temperature sensor for sensing a temperature of said arrester block, said temperature sensor sensing a change in a longitudinal extent of said arrester block, wherein said temperature sensor has a pressure pickup, said arrester block resting on said pressure pickup.
2. The surge arrester according to claim 1 , wherein said temperature sensor has a strain gage or means for sensing a mechanical tension.
3. The surge arrester according to claim 1 , further comprising means for optically monitoring a protuberance, expansion or tension of said pressure pickup.
4. The surge arrester according to claim 1 ,
wherein said arrester block has a stack of arrester elements; and
further comprising tensioning elements for bracing said arrester elements.
5. A surge arrester for high voltages, comprising:
an arrester block forming a nonlinear resistance;
a high-voltage connection connected to said arrester block; and
a temperature sensor for sensing a temperature of said arrester block, said temperature sensor sensing a change in a longitudinal extent of said arrester block, wherein said temperature sensor is disposed at a point on the surge arrester which is close to ground potential.
6. The surge arrester according to claim 1 , further comprising:
a monitoring unit; and
a signal line, said temperature sensor connected to said monitoring unit via said signal line.
7. A surge arrester for high voltages, comprising:
an arrester block forming a nonlinear resistance;
a high-voltage connection connected to said arrester block; and
a temperature sensor for sensing a temperature of said arrester block, said temperature sensor sensing a change in a longitudinal extent of said arrester block;
wherein said temperature sensor has a pressure pickup; and
further comprising a rigid transmission element supporting said arrester block, said rigid transmission element resting on said pick up.