Inspection Body
Inspection body "type C"
The inspection body of type C to "TriEl" ltd, is. a separate independent structural unit within the company. The control body is accredited by the Executive Agency “Bulgarian Accreditation Service” according to BDS EN ISO/IEC 17020:2012. and has an ACCREDITATION CERTIFICATE reg. number 173 OKS valid until 2027 ., according to BDS EN ISO / IEC 17020: 2012.”.
The Inspection Body at TriEl carries out activities for control in new and/or in operation objects and facilities in the following areas:
Electrical switchgear and equipment up to and over 1000 V
Power and instrument transformers up to and over 1000 V
Apparatuses, relays, secondary wiring and electrical installations for voltage up to 1000 V
The controlled parameters for each area are shown in Accreditation Order "A221 2023"
Highly qualified specialists with proven theoretical and practical knowledge are a prerequisite for the professional and correct execution of control activities., as well as modern equipment, calibrated in Bulgarian and European laboratories, accredited under BDS ISO/IEC 17025.
Technical resources
Three-phase relay protection tester FREJA 300
Automated testing of relay protections
Multifunctional tester Omicron CPC 100
-Automated testing of power transformers
-Measurement of contact resistance and winding resistance -Primary and secondary testing of relay protections
Insulation resistance tester KYORITSU 3125
Insulation resistance measurement with voltage up to 5000 V
Earthing resistance tester KEW 4106
Measurement of resistance of grounding and lightning protection installations
Electrical installations tester . KYORITSU 6050
-Mesuring of operating current and time of RCD protections
-Touch voltage measurement
Digital microohmmeter M2420A
Contact resistance measurement in range 1 mOhm – 200 Ohm
Request for control
You can send a request for control to the Head of the Control Authority on site at the company's office or by filling out and sending a Control Request FK 701-1
Complaints and objections
Every client/interested party has the right to submit a written complaint or objection in connection with the control activities carried out by Independent Control Body type C to "TriEl" ltd on site at the company's office. Complaints or objections are considered within one week from the date of their receipt, according to the Control Body type C management system. A written response is given to the person or organization, filed the complaint or objection, according to Feedback Card FK 706-1