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中性点接地电阻及其配套控制柜

中性点接地电阻及其配套控制柜

产品详情

中性点接地电阻柜及其配套控制柜

Neutral Grounding Resistor and Control Cabinet

 产品描述(Product Profile)

中性点接地电阻主要用于110KV以下主要由电缆线路构成。单相接地故障电容电流较大的送配电系统及电容电流虽小但为防止谐振过电压的电厂、厂用电系统,前者多为低阻接地而后者多为高阻接地。因此,中性点接地电阻特别适用于城市配电网、大型工业园区、电厂、海上平台配电系统、大型化工企业等

百益彩票APP下载Neutral Grounding resistors are mainly applied to the electric power system under 110KV. One is the electric power distribution system which is composed by cable lines, with big fault capacitance and current (single-phase earthing). The other is the electric power system for electric power plant whose capacitance and current are little but to avoid the resonance. The former system is mostly low-resistance earthing, and later is high-resistance earthing. Therefore, neutral Grounding resistors are especially suitable for urban electric networks, large industry garden, electric power plant, maritime electric power distribution system and large chemical enterprises, etc.

 产品特点(Product Features)

1. 使用电压范围:0.33 ~110KV

  2. 故障电流:1~5000A

  3. 额定阻值范围:0.1Ω∽1500Ω

  4. 运行通流时间:5s,10s,30s,60s,10mins,连续运行

百益彩票APP下载  5。 防护等级:IP20~IP55

  6. 安装方式:户内、户外

  7. 可辅助安装隔离开关、断路器、CT、PT等

 

  8. 温升:1)当额定时间:10s,大温升≤760K

     2)当额定时间: 10s<t<10mins,大温升≤610K

     3)连续工作:大温升≤385K

    

1. Voltage range:0.33 ~110KV

2。 Rated Current: 1~5000A

3。 Resistance Range:0。1Ω∽1500Ω

4. Working time: 5s,10s,30s,60s,10mins,working continuous

5. Ingress Protection:IP20~IP55

6. Installation:Indoor、Outdoor

7。 Auxiliary parts: disconnecting switch, circuit breaker, CT, PT etc。

8。 Resistor temperature rise:  1)Rated time :10s, maximum temperature rise≤760K;  2)Rated time : 10s<t<10mins, maximum temperature rise ≤610K; 3)Working continuous, maximum temperature rise ≤385K

 接线原理图 (Wiring diagram)

   三相交流电网中性点与大地间电气连接的方式,称为电网中性点接地方式。电网中性点接地电阻工作原理图如下:

   The electrical connection mode between neutral point three-phase AC power grid and earth, called grounding mode for neutral point。 Neutral point grounding resistor principle diagram as follows:

 

 

对变压器中性点,其电阻接地有两种方式:

 对变压器副边为星型接法的变压器,中性点经电阻直接接地。(见图一)

 对变压器副边为角型接法的变压器,中性点经接地变压器经电阻接地。(见图二)

   Neutral point of transformer, the grounding resistor has two ways:

 On the secondary side the transformer is a star connection method, the neutral point grounding resistor straight. (see Figure.1)

 On the secondary side the transformer is a triangle connection method, the neutral point grounding transformer grounding through grounding transformer. (see Figure. 2)

 产品选型表(Product Selection Table)

Ⅰ)6.3KV系列中性点电阻柜选型表如下: 6.3KV series neutral grounding resistor selection table,as follows:

型号Type

中性点电压

阻值

故障电流

通流时间

防护等级

外型尺寸 Enclosure

 线电压

Line Voltage

相电压

Phase Voltage

Resistance 

 Fault

Current

Rated

Time

Protection Class

Length

Width

High

KV

KV

[Ω]

[A]

[s]

IP

[mm]

[mm]

[mm]

TNGR

6.3

3.64

72。8

50

10

IP2X

800

1000

1180

TNGR

6.3

3。64

36。4

100

10

IP2X

800

1000

1180

TNGR

6。3

3。64

18。2

200

10

IP2X

800

1000

1180

TNGR

6.3

3。64

14.6

250

10

IP2X

800

1000

1180

TNGR

6.3

3.64

12。1

300

10

IP2X

800

1000

1180

TNGR

6。3

3.64

9.1

400

10

IP2X

1000

1000

1180

TNGR

6。3

3.64

7。3

500

10

IP2X

1000

1000

1180

TNGR

6。3

3.64

6.1

600

10

IP2X

1000

1000

1180

TNGR

6.3

3.64

4.6

800

10

IP2X

1000

1000

1180

TNGR

6.3

3。64

3.6

1000

10

IP2X

1000

1000

1180

TNGR

6.3

3.64

3.0

1200

10

IP2X

1000

1000

1180

TNGR

6。3

3。64

2.6

1400

10

IP2X

1000

1000

1180

TNGR

6。3

3.64

2.3

1600

10

IP2X

1000

1000

1180

Ⅱ)10。5KV系列中性点电阻柜选型表如下: 10。5KV series neutral grounding resistor selection table,as follows:

型号

Type

中性点电压

阻值

故障电流

通流时间

防护等级

外型尺寸 Enclosure

 线电压

Line Voltage

相电压

Phase Voltage

Resistance Value

 Fault

Current

Rated

Time

Protection

Length

Width

High

KV

KV

[Ω]

[A]

[s]

IP

[mm]

[mm]

[mm]

TNGR

10.5

6.06

121.2

50

10

IP2X

800

1000

1480

TNGR

10.5

6.06

60.6

100

10

IP2X

800

1000

1480

TNGR

10。5

6.06

30。3

200

10

IP2X

800

1000

1480

TNGR

10.5

6。06

24.3

250

10

IP2X

800

1000

1480

TNGR

10。5

6.06

20。2

300

10

IP2X

800

1000

1480

TNGR

10.5

6。06

15.2

400

10

IP2X

1000

1000

1480

TNGR

10。5

6.06

12.2

500

10

IP2X

1000

1000

1480

TNGR

10.5

6.06

10.1

600

10

IP2X

1000

1000

1480

TNGR

10.5

6。06

7.6

800

10

IP2X

1200

1000

1480

TNGR

10.5

6.06

6.1

1000

10

IP2X

1200

1000

1480

TNGR

10.5

6.06

5。1

1200

10

IP2X

1200

1000

1480

TNGR

10。5

6.06

4.3

1400

10

IP2X

1200

1000

1480

TNGR

10。5

6.06

3。8

1600

10

IP2X

1200

1000

1880

TNGR

10.5

6.06

3.4

1800

10

IP2X

1200

1000

1880


Ⅲ)20KV系列中性点电阻柜选型表如下: 20KV series neutral grounding resistor selection table,as follows:

型号

Type

中性点电压

阻值

故障电流

通流时间

防护等级

外型尺寸Enclosure

 线电压

Line Voltage

相电压

Phase Voltage

Resistance Value

 Fault

 Current

Rated

Time

Protection

Length

Width

High

KV

KV

[Ω]

[A]

[s]

IP

[mm]

[mm]

[mm]

TNGR

20

11.55

231

50

10

IP2X

1300

2300

2300

TNGR

20

11.55

115。5

100

10

IP2X

1300

2300

2300

TNGR

20

11。55

57.7

200

10

IP2X

1300

2500

2300

TNGR

20

11.55

46.2

250

10

IP2X

1300

2700

2300

TNGR

20

11。55

38.5

300

10

IP2X

1300

2700

2300

TNGR

20

11.55

28.9

400

10

IP2X

1300

2500

2300

TNGR

20

11.55

23.1

500

10

IP2X

1300

2500

2300

TNGR

20

11.55

19.3

600

10

IP2X

1300

2700

2300

TNGR

20

11。55

14.4

800

10

IP2X

2100

2500

2000

TNGR

20

11.55

11.6

1000

10

IP2X

2100

2500

2000

TNGR

20

11.55

9。6

1200

10

IP2X

2100

2500

2000

TNGR

20

11.55

8.3

1400

10

IP2X

2100

2500

2000

TNGR

20

11.55

7。2

1600

10

IP2X

2100

2700

2000

TNGR

20

11.55

6.4

1800

10

IP2X

2100

2700

2000

TNGR

20

11.55

5.8

2000

10

IP2X

2100

2700

2000

Ⅳ)35KV系列中性点电阻柜选型表如下: 35KV series neutral grounding resistor selection table,as follows:

型号

Type

中性点电压

阻值

故障电流

通流时间

防护等级

外型尺寸Enclosure

 线电压

Line Voltage

相电压

Phase Voltage

Resistance Value

 Fault

 Current

Rated

Time

Protection

Length

Width

High

KV

KV

[Ω]

[A]

[s]

IP

[mm]

[mm]

[mm]

TNGR

35

20。2

404.6

50

10

IP2X

1600

2600

2524

TNGR

35

20.2

202.3

100

10

IP2X

1600

2600

2524

TNGR

35

20.2

101。2

200

10

IP2X

1600

2800

2524

TNGR

35

20.2

80.9

250

10

IP2X

1600

3000

2524

TNGR

35

20.2

67。4

300

10

IP2X

1600

3000

2524

TNGR

35

20.2

50.6

400

10

IP2X

1600

2800

2524

TNGR

35

20。2

40.5

500

10

IP2X

1600

2800

2524

TNGR

35

20.2

33。7

600

10

IP2X

1600

3000

2524

TNGR

35

20。2

25.3

800

10

IP2X

2400

2800

2144

TNGR

35

20.2

20.2

1000

10

IP2X

2400

2800

2144

TNGR

35

20.2

16。9

1200

10

IP2X

2400

2800

2144

TNGR

35

20。2

14.5

1400

10

IP2X

2400

2800

2144

TNGR

35

20.2

12.6

1600

10

IP2X

2400

3000

2144

TNGR

35

20。2

11.2

1800

10

IP2X

2400

3000

2144

TNGR

35

20.2

10.1

2000

10

IP2X

2400

3000

2524

注: 由于品种规格多,更多规格请询问本公司业务人员。

Remark: For other technical parameters & requirements, please contact with our company's business

 

以上电阻采用不锈钢电阻片,CT可选(若带接地变、真空接触器、隔离开关设备,通流时间>10S时,箱体尺寸需另外调整)

 Stainless steel resistors ,CT is optional(if other equipment like grounding transformer, isolating switch, vacuum contactor and the rated time >10S,the enclosure dimensions will be adjusted )


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