GrandtopFounded in 2004, Shanghai GrandTop Lightning Technology Co., Ltd aims to provide power impulse equipments and test solutions. We can provide SPD test equipments, high voltage test equipments, control and measurement systems based on computer and special pulse power source.With a professional R&D team of the pulse power technique, our company integrates with the high engineering, power electronics and measuring techniques, the high voltage electrical engineering, power electronics and measuring technique fields. We try our best to provide advanced technology, reliable products and thorough services to our customers.We can provide professional solutions to test the low voltage and high voltage electrical apparatus.Our products include the below range:1. impulse test equipments 1.1 impulse current generator (8/20?s, 4/10?s, 30/80?s, 10/350?s, 10/250?s, 10/1000?s and 2ms etc.) for testing the SPD, MOV, gas discharge tube, ZnO Varistor and surge arrestor.1.2 impulse voltage generator (1.2/50us lightning waveform, 250/2500us switching waveform, chopping gap, steep waveform ) on medium-voltage and high voltage apparatus, such as circuit breakers, power transformers, current transformers, power cables, insulators, bushings, etc.2. Withstanding voltage test 2.1 Cylinder Type Test Transformer2.2 Tank Type Test Transformer,2.3 SF6 gas filled test transformer,2.4 AC resonant system;3. Coupling Capacitor 4. Special Power Apparatus -----plasma/laser power source irradiation equipment/electrostatic dust collector/VF power source and other DC HV electrical source;5. Thermal Stability Test Set and Combination waveform generator