The neutral grounding series

WF-B Transformer neutral grounding resistor panel

型号:WF-B系列

规格:

Description: WF-B transformer neutral grounding resistor cabinet to reduce over-voltage grid, improve network security, reliability, with good results. 6 ~ 35kV cable for power supply system grounded capacitor current larger system.



1.About us:

Baoding Weifan Electric company is a domestic professional manufacture of power system neutral grounding equipments and complete implements ISO9001 quality management system. We have a excellent sales performance all over the world and have been exported to more than 40 countries. WFBF offers a complete range of products for the necessary neutral-point connections

2.General introduction

WF-BF neutral grounding resistor cabinet (NGR or NER) are employed in medium-voltage AC distribution networks to limit the current that would flow through the neutral point of a transformer in the event of an earth fault. It connected between the neutral point of the transformer and the earth.

3. Options include: 

a. Earthing transformer or grounding transformer 

When the transformer windings adopt delta connection and a Zigzag connecting, Grounding transformer needs to be separately installed, the THT-ZT-type neutral grounding resistor cabinet can be matched.

b.Intelligent control units. 

It would not only monitor the earth fault and temperature of unbalanced current and resistors, but also record the current value, time, NGR temperature changes and grounding frequency. At the same time, it will transmit the above information to the main control room.

4.specifications:

a. Ambient temperature: -40°C~60°C

b. Altitude: less than 4000m

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

d. Codes and standards: IEEE-32 , DL/T 780-2001

e. Rated frequency: 50/60HZ

f. Location: outdoor/indoor

g. Enclosure: aluminum-zinc plates, stainless steel plates or cold-rolled steel plate 

h. according to your requirements.

j. Resistor material: stainless steel

k. Degree of protection: design as required 

l. Package:Fumigation-free woodiness packaging

m. Shen Yang Transformer Research Institute CO.LTD 

5.Regular Technical Particulars for reference

Type

System rated voltageKV

Rated voltage resistance cabinetKV

Short to allow flowA

Nominal resistanceΩ±10%

Dimensions

W×D×Hmm

Weight 

kg

B6.3-100-10

6.3

3.64

100

36.4

1167*1067*1120

320

B6.3-200-10

6.3

3.64

200

18.2

320

B6.3-300-10

6.3

3.64

300

12.1

320

B6.3-400-10

6.3

3.64

400

9.09

320

B6.3-600-10

6.3

3.64

600

6.06

325

B6.3-1000-10

6.3

3.64

1000

3.64

330

B10-400-10

10

5.77

400

14.4

1167*1067*1270

340

B10-600-10

10

5.77

600

9.6

345

B10-1000-10

10

5.77

1000

5.77

350

B10.5-400-10

10.5

6.0

400

15

1167*1067*1270

340

B10.5-600-10

10.5

6.0

600

10

345

B10.5-1000-10

10.5

6.0

1000

6

350

B10.5-600-10(high)

10.5

6.0

600

10

1000*800*2000

350

B35-200-10

35

20

200

100

2*1346*1524*2300

1250

B35-600-10

35

20

600

33.7

1250

B35-1000-10

35

20

1000

20

1250

B35-1300-10

35

20

1300

15.5

2*15241524*2845

 

B35-2000-10

35

20

2000

10

1500


Notes: manufactures various resistors according to the customer’s requirement, the design inaccuracy is ±3%, the flow time is various from 10s, 15s,30s, 60s,2h.

6. Ordering notes

(please inform us the following necessary parameters)

System voltage , rated current ,resistance value

Material of the cabinet, IP protect level ,color and the installation location.

Mood of the cable incoming and out coming

Rated time of the current

CT’s ration











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