One.Overview

Generator in operation, the single-phase earth fault occurs is the most common, the grounding fault arc will further expand the stator winding insulation damage even core burn sintering, the generator neutral point via high resistance grounding, can limit the fault current to the appropriate value, thus inhibiting generator grounding fault current, effectively prevent the stator winding insulation damage, and can reduce the arc grounding transient overvoltage.

There are several schemes for high resistance grounding of neutral point, which is the optimal combination of single-phase grounding transformer and resistor structure. Our jt-fz generator grounding resistance cabinet is compact, compact, light in weight and excellent in components. Grounding transformer anti - impact, flame retardant, small. The resistance is made of nickel-chromium alloy, stainless steel and other materials, with high resistivity, high temperature resistance, corrosion resistance, stable performance, strong flow capacity, and suitable for various complex environments.

Two.Model specification

Three.Technical indicators

The altitude is no more than 3000m.

The air humidity is no more than 95%, no conductive dust exists.

Voltage grade: 6.3kV-20kV generator set.

The resistance value, rated current and flow time are provided by the user and can be designed by us.

The shape, size, material and color of the resistance cabinet can be designed according to the user's requirements.

Four.Product features

The combination of ground and resistor is optimal in the high resistance grounding scheme.

The resistance is small and light. Ground change impact, flame retardant, small.

The resistance is made of nickel-chromium alloy or stainless steel material with high resistivity, high temperature resistance and good corrosion resistance. Suitable for all kinds of complex environments.

It can be equipped with isolation switch, current transformer, fault signal interface and protection interface.

Five.Using the environment

When the environment temperature: - 40 ℃ ~ + 55 ℃.

The height is customized according to customer's requirement.

When relative humidity: no more than 95% (25 ℃).

Power grid frequency: 58-62hz (60Hz system), 48-52hz (50Hz system).

The air in the installation site should not contain chemical etching gas and steam, no explosive dust.