Minsktelecomstroy

• Communication cable lines with metal strands
     - electric capacity of a circuit
     - electric resistance of strands (loop)
     - resistances asymmetry of strands
     - electric insulation resistance
     - crosstalk attenuation between circuits;
• Ground connection of station and line communication structure
     - resistance of ground grid
• Optical cable communication lines
     - optical cable attenuation
     - attenuation on connectors
     - optical length
• Electrical installations to 1 kV, including cable lines
     - insulation resistance
     - contact voltage
• Ground connections of electrical installations
     - resistance of ground connections
     - ground specific resistance
     - testing presence of circuit between:
                        - grounding electrode and grounding elements
                        - grounding installations and elements of the grounding installations
     - testing of protection in electrical installations up to 1 ê at a power supply system 
       with deaf grounding of neutral by measurement of a current of single-phase locking on
       the case or the neutral wire
• Grounding electrode intended for protection against storm voltage surges
     - resistance of grounding connections