YNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor
  • Air ProYNGR Series Neutral Grounding Resistor

YNGR Series Neutral Grounding Resistor

YNGR series neutral grounding resistor is suitable for the operation mode of neutral point through resistance grounding. It is widely used in transformers of 6 ~ 66KV alternating current power grids such as power system of power plant, power supply system of substation, power distribution system of industrial and mining enterprises Or generator neutral point.

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Product Description

YNGR Series Neutral Grounding Resistor


Product

YNGR Series Neutral Grounding Resistor

Application 

Range

YNGR series neutral point grounding resistance cabinet is suitable for the operation mode of neutral point through resistance grounding. It is widely used in transformers of 6 ~ 66KV alternating current power grids such as power system of power plant, power supply system of substation, power distribution system of industrial and mining enterprises Or generator neutral point.

Working 

Principle

When a fault occurs in the power system (such as a partial short circuit or open circuit in the power grid), the neutral point of the power distribution system will be shifted. At this time, the neutral point ground resistance will force the neutral point of the power distribution system to ground and limit its failure. Electrical currents allow the power system time to detect, diagnose, protect, and switch over, thereby avoiding possible line or equipment damage. Since the neutral point resistance can absorb a large amount of resonance energy, in the grounding method with a resistor, the fundamental suppression of the system resonance overvoltage. The neutral point grounding resistance is very small when the power transmission and distribution system works normally, and when the power system fails, the current flowing through the neutral point grounding resistance is large and the time is very short. It is usually used for short-term work system. The neutral point grounding resistance of our company is designed in accordance with ANSI / IEEE 32.1972 and IEC625 and related standards.

Use Environment

1.Installation site: The altitude does not exceed 1000m.

2.The highest ambient air temperature does not exceed + 40℃, and the lowest ambient temperature is not lower than -15℃.

3.Environmental humidity: daily average relative humidity W95%, monthly average relative humidity W90%.

4.The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc .

5.No serious pollution and frequent severe vibration.

Technical Performance And Characteristics

1.The resistance element is made of stainless steel, high temperature resistance and strong oxidation resistance.

2.Resistance element error V±5%, resistance temperature coefficient .

3.Temperature rise: no more than 760K within 10s of power-on time.

4. Can be installed with isolation switch, convenient maintenance.

Implementation Standards

1.DL/T780-2001:Neutral point resistors for power distribution systems.

2.DI/T620-1997:Overvoltage protection and insulation coordination of AC electrical devices.

3.GB/T16927:High voltage test technology.

4.GB1208-1997:Currenttransformer.

5.GB4208-93:Enclosure protection level (IP code).

6.IEEE32-1972 Standard:Techniques, terminology and tests for neutral grounding devices.




Common Model Selection of YNGR Series Neutral Grounding Resistor​:


Model

System rated 

voltage (KV)

Rated voltage of 

resistance 

cabinet(KV)

Allow flow for 

a short time(A)

Short-time flow 

time (s)

Nominal 

resistance (±5%)

YNGR6. 0-100-10

6.0

3.46

100

10

34.6

YNGR6. 0-200-10

6.0

3.46

200

10

17.3

YNGR6.0-400-10

6.0

3.46

400

10

8.6

YNGR6. 0-600-10

6.0

3.46

600

10

5.7

YNGR6.3-100-10

6.3

3.64

100

10

36.4

YNGR6. 3-200-10

6.3

3.64

200

10

18.2

YNGR6. 3-400-10

6.3

3.64

400

10

9.1

YNGR6.3-60010

6.3

3.64

600

10

6.0

YNGR10.5-200-10

10.5

6.0

200

10

30

YNGR10.5-400-10

10.5

6.0

400

10

15

YNGR10.5-600-10

10.5

6.0

600

10

10

YNGR10.5-1000-10

10. 5

6.0

1000

10

6

YNGR22-100-10

22

12.7

400

10

31.7

YNGR22-600-10

22

12.7

600

10

21.2

YNGR22-1000-10

22

12.7

1000

10

12.7

YNGR35-400-10

35

20

400

10

50

YNGR35-600-10

35

20

600

10

33.3

YNGR35-800-10

35

20

800

10

25

YNGR35-1000-10

35

20

1000

10

20

YNGR35-1250-10

35

20

1250

10

16

YNGR35-1600-10

35

20

1600

10

12.5

YNGR35-2000-10

35

20

2000

10

10

YNGR66-1000-10

66

38

1000

10

38

YNGR66-1250-10

66

38

1250

10

30.4

YNGR66-1600-10

66

38

1600

10

23.7

YNGR66-2000-I0

66

38

2000

10

19




Views And Parts of YNGR Series Neutral Grounding Resistor​:


Project Nnumber

Part Number

Quantity

1

SUS Siding

8

2

ZN-12-4-120mm(Indoor pillar insulator)

16

3

Bakelite laser

2

4

Screw SUS304 M8X408 full tooth

23

5

Porcelain tube Q70X310

23

6

Φ70 bend snap ring

46

7

Φ70 round bracket

46

8

Mica ring(bore:50mm,outer diameter:80mm,thick;1mm)

46

9

SUS304M8 Spring washer flat washer

24

10

SUS304M6 Spring washer flat washer

12

11

SUS304 M6*16

12

12

SUS304 M12 Spring pad flat pad

16

13

SUS304 M12*25

16






Installation Drawing of YNGR Series Neutral Grounding Resistor​:


Electrical Data

System Voltage (Ur)

10.5

KV

Rated Voltage (Un=Ur/√3)

6.0

KV

Resistance® 25 V

44

Ω

Rated Fault Current

137

A

Rated Fault Time

10

Sec

Rated Continuous Current

-

A

Insulation Level

12

KV

Power Frequency Withstand Voltage

42

KVrms

Impulse Withstand Votage (BIL)

75

KVpeak

Max Temperature Rise

760

°C

Resistance Material:

Nickel-Chromium Stainless Steel AISI304

Tenninal

 

Top

Bottom

Direct On Grid

On Isulator

On Bush

In

Yes

-

Yes

-

-

Out

-

Yes

Yes

-

-

Enclosure 

Painted

Galvanized

Other

Yes

- 

-

Color

Grey

Protection Degree

IP30

Dimension

900x1010x1604

MM

Approx. Net Weight

350

KG

Accesories

1.CT:12KV, 200/1, 5P10,20VA

2.RELAY:0.5A-9.99A AC

Standards  

IEEE-32

Dimension tolerance: ±5mm


 





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