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July 1994
Wuhan E'dian Power Test Equipment Co., Ltd. was officially founded.
1995
Established the R&D Department and independently developed the first ED0202 integrated transformer performance test bench.
1996
1996
1997
1997
Obtained ISO9001 Quality Management System Certification.
1998
Independently developed and manufactured the GTB series dry-type lightweight test transformers.
1998
Successively launched YDQ series SF6 gas-insulated test transformers and YDQW series SF6 gas-insulated partial discharge-free test transformers.
1999
Took the lead in launching the high-capacity & high-voltage JY series insulated cylinder type test transformers, raising the single-unit voltage rating up to 400KV.
2000
Released TPXB variable frequency series resonant transformers, with the voltage level and capacity upgraded to 600KV.
2001
Launched partial discharge test system, transformer winding deformation tester and other professional testing equipment.
2001
Developed and put into mass production the impulse voltage generator.
2002
Independently developed the 0.1Hz ultra-low frequency high voltage transformer, reaching the leading domestic technical level in the industry.
2004
Officially launched the industry portal — China Power Test Equipment Network, and set up the editorial department of E'dian Express corporate magazine.
2005
E'dian Express magazine was officially launched.
2005
Independently developed a complete series of SF6 gas testing equipment, including SF6 gas trace moisture analyzers (dew point meters), high-precision quantitative leak detectors, gas purity analyzers, decomposition product analyzers, density relay calibrators, multi-functional comprehensive analyzers, as well as SF6 vacuuming, purification, recovery and inflation devices. All products have reached advanced domestic industry standards.
2006
Developed and put into production SF6 gas leakage monitoring & alarm systems and online SF6 micro-water & density monitoring devices.
2007
Self-developed portable hydrogen testing instruments, including portable hydrogen micro-water analyzers, hydrogen leak detectors, thermal conductivity hydrogen purity analyzers and multi-functional comprehensive hydrogen analyzers, with leading domestic technical performance.