Sigma Laboratory Tec. has established an advanced high-voltage and large-capacity testing laboratory in the United Kingdom, providing product certification testing, quality inspection, commissioned testing, and technical evaluation services for high-voltage switchgear and control gear to clients worldwide.
In the field of high-voltage electrical testing, Sigma Laboratory Tec. has adopted a high-current test power source integrated with advanced measurement and control systems, multiple sets of large-capacity impulse generators, and dedicated high-voltage test circuits. This system is capable of meeting the high-power requirements for conducting short-circuit tests on 11kV, 33kV, 132kV, 275kV, and 400kV class electrical equipment, with future expansion capability for higher-voltage transmission applications.
The testing system allows flexible adjustment of test voltage and current according to the specific requirements of tested products and applicable international standards. Sigma Laboratory Tec. is able to support a wide range of testing programs for manufacturers, utilities, EPC contractors, and industrial clients worldwide, helping to shorten testing cycles and improve the efficiency of technical evaluation and test reporting services.




Direct Test—three-phase 40.5kV/50kA、24kV/80kA、12kV/250kA、AC420V/500kA、DC440V/320kA
High current test---long-term thermal current 35kA
High voltage insulation test—550kV, 1200kV
Synthetic Test: 550kV 63kV full pole
Three-phase: 252kV 63kA and below
Three-phrase synthetic test: 1200kV/150kA(WIP)
Capacitive current making and switching test:------40.5kV and lower three-phase back to back 2000A,72.5kV ~ 252kV single phase back to back 2000A
Power-frequency withstand voltage---2400kV
Impulse withstand voltage—7200kV
