Shanghai Grandtop Electrical Technology Co., Ltd

Founded 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 for the low voltage and high voltage electrical apparatus, such as lightning conductors, aircraft devices, SPD, MOV, GDT, power transformers, insulators, switchgears, power cables, voltage transformer, current transformer, bushings, etc.

Our products include the below range:

1. Impulse test equipments

1.1 impulse current generator (8/20μ S, 4/10μ S, 30/80μ S, 10/350μ S, 10/250μ S, 10/1000μ 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.

1.3 horizontal and vertical sphere gaps upto 1000mm

1.4 damped capacitive voltage divider upto 3000kV

1.5 resistive voltage divider upto 1600kV 12k Ohm

2. Withstanding voltage test

2.1 Cylinder Type Test Transformer upto 2250KV

2.2 Tank Type Test Transformer upto 900kV 900kVA

2.3 SF6 gas filled test transformer,

2.4 AC resonant system upto 1600KV

2.5 Coupling Capacitor upto 800kV

3. High voltage construction kit AC, DC and impulse in one equipment.

4. Partial discharge measuring meter online and offline

5. C &Tan delta measuring bridge

6. Load losses and short circuit impedance measurement

7. DC high voltage generator

8. Transformer turns ratio meter

9. TOV test set

10. Thermal stability test

11. Combination wave generator (1.2/50us and 8/20us waveform )

12.2ms square waveform

We try our best to provide advanced technology, reliable products and thorough services to our customers. Our products are stable and of high quality. We have supplied our products to many famous SPD manufacturers, Provincial SPD centers and laboratories, MOV manufacturers, universities, high voltage laboratories and research centers, such as HK polytechnic university, Guizhou University, CITEL France, littel fuse, EPCOS, China academy of railway sciences, lightning protection center of Shanghai, Beijing testing center of SPD, Hubei SPD center, and Intertek, etc.

Below is a list of some of our customers.