System for line monitoring in an energy chain

A monitoring system for monitoring condition of at least one line, comprising:

• an energy guide chain which is displaceable along a travel path and, in so doing, forms a mobile run with a connection end for a moving end, a stationary run with a connection end for a base and a deflection arc between the two runs, wherein the at least one line is guided in the energy guide chain between the base and the moving end movable relative thereto, and
• a monitoring device with at least one sensor unit arranged on the energy guide chain, which monitoring device evaluates a signal generated using the sensor unit in order to monitor occurrence of a fault condition during operation of the energy guide chain,
• wherein the sensor unit includes two electrical indicator conductors guided by the energy guide chain and extending at least along a greater part of a length of the mobile run, and
• wherein the monitoring device comprises a circuit with a measurement device for measuring resistance or conductance, and
• wherein one end point of each of the two indicator conductors is connected at one connection end of the energy guide chain to the measurement device and a respective other end point of each of the two indicator conductors are short-circuited, such that the conductors form a measurement loop, the resistance or conductance of which is measurable by the measurement device.