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LPFI環網柜

G&WLPFI環網柜包含了負荷開關和斷路器的能力。斷路器提供有電子控制,完好的密封,過電流保護,故障保護設備。本環網柜設計用于3相系統,最高點壓值27kV, 630A額定工作電流,以及12.5kA故障跳斷值。特點是結構緊湊,前端接入。

本環網柜按標準IEEE C37.72, C37.74, 和C37.60為負荷開關和斷路器設定能力。外箱柜的設計和測試標準為IEEE C57.12.28 和C57.12.29。

Click to enlarge

Features:

  • Padmount installation
  • Compact construction with front accessible switch operators and bushings
  • 15.5kV -27kV with 40kA asymmetrical load break momentary and close into fault ratings
  • 630A continuous and load break ratings
  • 12.5kA symmetrical fault interrupting ratings

具體特點:

  箱柜安裝

結構緊湊,前部套管接入及前部操作

15.5kV -27kV及 40kA非對稱負荷峰值耐受電流以及故障關合電流。

630A額定工作電流。

12.5KA跳斷額定電流。

 

LPFI ratings

Maximum design voltage

15.5 kV

27 kV

Voltage class

15 kV

25 kV

Impulse level (BIL)

110 kV

125 kV

One minute withstand

35 AC kV

60 AC kV

One minute withstand, production test rating

34 AC kV

40 AC kV

15 minute withstand

53 DC kV

78 DC kV

Continuous and load break current

630 Amps

630 Amps

Load Break Switch Momentary current

40 kA asym

40 kA asym

Load Break Switch Fault close current, (3 times)

40 kA asym

40 kA asym

Load Break Switch One second current

25 kA asym

25 kA asym

Fault Interrupter Symmetrical interrupting rating

12.5 kA

12.5 kA

Load Break Switch Open gap withstand

200 kV

200 kV

Load Break Switch 10 operation overload interrupting capability

3000 Amps

3000 Amps

Operations load interrupting endurance at 600A for Load Break Switch

1200

1200

Mechanical endurance, operations

2000

2000

IEEE C37.60
Fault Interrupting Duty
Total number of fault interruptions: 116

Percent of Maximum Interrupting Rating

Approx. Interrupting Current, Amps

No. of Fault Interruptions

15 – 20%

2,000

44

45 – 55%

6,000

56

90 – 100%

12,500

16

 

LPFI 參數

最大設計電壓

15.5 kV

27 kV

電壓等級

15 kV

25 kV

雷電沖擊電壓(BIL)

110 kV

125 kV

一分鐘工頻交流耐壓

35 AC kV

60 AC kV

一分鐘工頻交流測試耐壓

34 AC kV

40 AC kV

十五分鐘直流耐壓

53 DC kV

78 DC kV

額定持續工作電流

630 Amps

630 Amps

額定峰值耐受電流

40 kA asym

40 kA asym

負荷開關故障關合電流, (3 次)

40 kA asym

40 kA asym

負荷開關一秒持續電流

25 kA asym

25 kA asym

斷路器開斷電流

12.5 kA

12.5 kA

負荷開關斷口耐壓

200 kV

200 kV

10次過載電流開斷能力

3000 Amps

3000 Amps

600A額定電流的開斷次數

1200

1200

機械操作壽命

2000

2000

IEEE C37.60測試
故障跳斷比率
總故障跳斷次數: 116

最大跳斷率百分比

跳斷電流Amps

故障跳斷

15 – 20%

2,000

44

45 – 55%

6,000

56

90 – 100%

12,500

16

 

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