Insulation fault location: The concept

• Start insulation fault location by activating the insulation fault test device ISOMETER®. 
   
• The insulation fault test device briefly connects the live conductors to earth.
   
• Electronic current limiting, this connection and the insulation fault create a closed circuit, in which a test current IT idetermined by the system voltage flows. The test current is limited to a maximum value.
   
• The test current pulse flows from the insulation fault test device via the live conductors, the insulation fault Rf and the earth wire (PE conductor) and back to the insulation fault test device.
   
• The test current signal is detected by all measuring current transformers on the circuit and evaluated by EDS insulation fault evaluators.
   
• The fault location can be identified using the assignment between measuring current transformers and circuit.

Optimised maintenance

• Insulation fault location without disconnecting the electrical installation
• Selective fault location by fast and precise localisation of the faulty sub circuit
• Centralised indication and operation with LC text display
• Reduced maintenance costs

Improved economic efficiency

• Time and costs for maintenance are reduced
• Weak points in the installation are recognised

Increased operating reliability

• Electrical installations are kept at a high level of availability
• Increased productivity because interruptions to operation are avoided
• More comfort for customers (service area)

Flexible and configurable solutions

• Cost-effective construction by modular system components
• Measuring current transformers are available in different sizes and shapes (round, rectangular, split core, flexible)