Periodic tests and inspections in electrical installations
Checking protection against direct touch
- Checking the protective hulls
- Check the integrity of the apparent insulation
- Verify the integrity of the enclosures
Verification of protection against indirect touches
- Verify separation of the neutral conductor (N) from the protective conductor (PE)
- Check the absence of interruptions on PE and PEN conductors
- Verify the continuity of the equipment connection to the protective conductor (PE)
- Verification of grounding of PE bars
- Check for fuses and check for short-circuit protection (fuses, automatic switches)
- Verification of the protection of the defective (ground / ground) fault-free protection, including automatic protection against fault currents (differential)
- Check the marking of protective conductors
- Verify the existence of protective links to distribution boards, equipment and sockets
- Verify the existence of additional protection measures
- Verify that the connecting bolts are tightened on the protective conductor circuits and that they are secured against unscrewing
- Check the connection of a single protective conductor to a screw
- Verify the continuity of protection bindings from the equipment masses to the earth terminals
- Verification of the ground dispersion resistance of the masses of electrical equipment
- Checking the continuity of the equipotential bonding
- Checking the corrosion of electrodes of artificial earth plugs
Verification of protection by additional insulation - Class II protection
Verification of protection by very low voltage supply - Class III protection
Verification of protection by separation - zero protection class
Testing of low and medium voltage electrical installations
- Testing the continuity of the electrical circuits
- Measurement of insulation resistance of electrical circuit circuits
- Measurement of earthing resistance dispersion resistances
- Test for TFJS (very low security voltage) or TFJP protection (very low protection voltage)
- Measurement of resistance / impedance of floor and wall insulation
- Protective test by automatic power cut
- Testing for additional protection
- Polarity test
- Sequence sequence sequencing
- Functional tests
- Attempt to voltage drop
- Enhanced voltage test
Equipment tested
- Electric switches and circuit breakers
- Electric contactors
- Protective relays
- Automatic fuses
- Fuses
- Capacitors for power factor improvement
- Electrical distribution boards of 0,4 kV
- Control-command installations
- Earthing installations
- Installations for protection against atmospheric overvoltages
- Transformers for medium and low voltage
- Medium and low voltage power transformers