1.About us:

Baoding Tianwei Hengtong Electric Co., Ltd is a one of leading manufacture in China specialize in NER or NGR neutral grounding equipments for electrical system.

 2. Purpose:

THT-FZG Neutral Grounding Resistors Enclosure is a complete set of equipment specially used for the power generator’s neutral point adapts the high resistance grounding.

 3.Design principle:

The arc grounding over-voltage occurs when the Generator main circuits have a high earth fault current. While the generator usually capable of loading low withstand voltage and easier to damage. The generator coil will sever burns if the earth current is too high. The –FZG type generator neutral grounding resistor is the most popular and safe in the practice by high resistance connecting to the earth.

4.Site condition:

(1)    Ambient temperature: -40°C~60°C

(2)    Altitude: less than 4000m

(3)    Relative humidity: less than 95% (25°C)

(4)    Rated frequency: 50/60HZ

 5.Properties:

(1)    Material of enclosure: stainless steel or aluminum zinc plate with high      corrosion-resistance.

(2)    Intellect controlled unit: monitor the unbalanced current, the resistor plate, the grounding transformer and the enclosure temperature, It can also transmit the earth fault information to the controlling room.

 6.Normal Parameter Table

Voltage Grade

10.5

10.5/0.23KV

Below 20

1400 x1450 x H

(height of cubicle depends on flange)

13.8

13.8/0.23KV

15.75

15.75/0.23KV

20

20/0.23KV

24

24/0.23KV

10.5

10.5/0.23KV

20-30

1500 x1550 x H

(height of cubicle depends on flange)

13.8

13.8/0.23KV

15.75

15.75/0.23KV

20

24

10.5

10.5/0.23KV

30-80

1700 x1750 x H

(height of cubicle depends on flange)

13.8

13.8/0.23KV

15.75

15.75/0.23KV

20

24

 7. When order, please supply:

(1)  the rated voltage, capacity and capacitive reactance of the system;

(2)  the type of the grounding transformer;

(3)  whether needs zero sequence current transformer, and its transformation ratio and capacity?

(4)  material of the enclosure, IP protectional grade, the color, installing place and the line mode.