ACCREDITATION

We are accreditated by BAS-Bulgarian Accreditation Service

Band of accreditation:

 1. Electrical installation and equipment up to and over 1000V

• -protective grounding resistance
• -insulation resistance
• -lightning protective grounding resistance
• -power frequency withstand tests
• -contact resistance

2. Electrical installation and the equipment next to 1000 V

• -loop impedance - Zs

3.    Safety equipment: isolate bars (manipulation, measuring, for portable grounding); isolated clamps; voltage detectors; current clamps; protective gloves, protective boots and galoshes; dielectric carpets and paths.

• -electric strength of insulation by AC voltage and leakage current and the thresholdvoltage indication 

• -insulation resistance
• -power frequency withstand tests

5.  Capacitor installation up to and over 1000V

• -value of current and evenness of loading of the individual phases
• -missing of hull earthing
• -HV withstand tests

• -insulation Resistance
• -power frequency withstand tests
• -winding resistance
• -transformer oil – breakdown voltage
• -transformer ratio
• -polarity check

• -insulation resistance
• -check of relay protection settings (direct or alternative(start up and return) current, direct or alternative(start up and return) voltage, time -delay, impedance(start up and return))
• -functional test (correct, incorrect act or functioning fail of the device)
• -active resistance
• -circuits integrity

• -insulation resistance
• -HV withstand tests
• -winding resistance (stators and rotors)
• -current and losses of idle running motor