We work jointly with High-voltage Laboratory of the Technical University of Sofia, which is a convenient place for the design of complex solutions and tests of completed products in the field of electrical power distribution. The laboratory gear includes:

• an auto-transformer 40kVA,
• an AC testing transformer 700kV / 0,5A,
• light impulse voltage generator 750kV and
• measuring equipment up to 750kV.

Automated laboratories for conducting various electric tests

Automated and autonomous laboratories for conducting electric tests are a very good solution when a manufacturer wants to certify that his products meet certain quality standards. This is applicable to manufacturers producing wire and cables, electric motors, transformers and other electrotechnical products.

Energy management systems (EMS)

The energy management systems designed by us include measurement, monitoring, analysis, control and management. Furthermore, we can conduct an analysis of the current state and offer possible energy-saving solutions.

Reports:

• Monthly reports on consumption
• Consumption reports on machines and workshops
• Reports on a 10-minute basis
• Reports for any period of time – for emergencies
• Report on the Common Energy Balance
• Alarming in case of disturbance of energy parameters
• Load Schedules
• Parameters
• RMS I1, I2, I3
• RMS U1, U2, U3
• Active power
• Reactive power
• Full power
• Network Frequency
• Phase angles
• Cos phi
• Power factor
• Harmonics analysis
• Min, Max, Average values
• Etc

• Standard high voltage testing
• Testing and evaluation of porcelain, glass and composite insulators (dry and wet, withstand and flashover)
• Testing of bushings
• Testing of switchgear, disconnecting switches, and circuit breakers
• Testing and commissioning of power cables and accessories
• Testing of power transformers (partial discharge and impulse tests)
• Testing of SF6 insulated equipment
• Testing and evaluation of instrument transformers
• Partial discharge testing of equipment
• Evaluation and analysis of transformer condition and faults
• Correspondence to standards
• 50 Hz dry & wet voltage flashover test
• Lightning impulse voltage withstand and flashover test
• Corona test (electrical and visible image detection)
• Tan delta measurement (24kV; 0,1Hz)
• Insulation watts loss test

High Voltage Lab Testing Services

• Maximum impulse voltage: 750 kV
• Maximum 50 Hz voltage: 700 kV

Test Facilities

• Indoor HV lab dimensions: 17 m (l) x 10 m (w) x 11m (h)

AC Test Equipment

• Test transformer: 50Hz, 700 kV, 0.5 A Cont.
• Capacitive voltage divider: 700 kV
• Resistive voltage divider: 750 kV
• Digital oscilloscope
• Radio interference voltage (RIV) meter
• Impulse Voltage Test Equipment
• Impulse generator: 750 kV, 1,2 kJ
• Capacitive voltage divider: 750 kV
• Resistive voltage divider: 750 kV
• A high-resolution digital recording system
• Digital oscilloscope
• Storage analogue oscilloscope

DC Voltage Test Equipment

• DC generator: 125 kV, 100 mA
• Resistive voltage divider: 750 kV