Cooperation with SGCC on Fuses – GRL Group

Safer Power Distribution box, Safer Grid

GRL fuse links, isolator switches, and busbar systems enable the assembly of safer distribution boxes.

Customer Profile

State Grid of China is the largest grid builder and operator in China, supplying power to more than 1.1 billion people. State Grid has thousands of suppliers, a large part of which are low-voltage electrical complete plants that provide distribution boxes for State Grid.

GRL provides fuse link, fuse switch, and busbar system products for these power distribution boxes, providing a guarantee for the security of the power grid.

Plateau Use

In western China, the poster height is generally higher than 3000 meters, which poses a great challenge to the fuse disconnector in the distribution box. For the plateau project of the State Grid, GRL has launched a special fuse-type disconnector.

Use self-produced fuse to ensure product quality

GRL fuse-type isolator switches all use self-produced fuses. A wide range of fuse coverage includes the following：

• 3 amp fuse, 5 amp fuse, 15 amp fuse, and other small current.
• Regular NT fuses like NT 100 amp fuse, 150 amp fuse, 200 amp fuse, and 250 amp fuse.
• In the field of new energy, the DC1500 fuse link, DC1000V fuse link, 10*85 fuse, and so on are all important products of GRL.

Adopt derating treatment in the plateau area

In the high poster area, GRL applies the NT3 fuse disconnector to the 400a circuit and uses the NT3 400amp fuse to ensure product performance.

Toughened DMC materials for complex environments

The commonly used 400a fuse disconnector and 630a fuse disconnector in plateau areas use DMC-toughened materials. The casing can still be sturdy and durable in a low-temperature environment of -40 degrees Celsius.

Optimum electrical connection

The installation method of the integrated distribution cabinet at the lower end of the transformer has always been a problem that electrical engineers want to solve. In this regard, GRL assisted China Power Grid in launching an integrated solution for transformers and integrated distribution boxes.

The GRL bus bar in the power system fixes the copper bar in the box through the bus bar bracket. It is also possible to mount the circuit breaker to the adapter. Hang it on the copper bar through the bus bar, and use the fuse switch as the main switch. (200KVA transformer uses 400 amp fuse, 400KVA transformer uses NT 630 am use)

The electrical busbar system can be divided into a 30mm bus system, a 60mm busbar system, and a 185mm busbar system, which can be applied to energy distribution in the control cabinet.

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