5 A, 2.2-sec IDMT रेटिंग और 125% रिले समायोजन के लिए रिले की संचालन धारा निर्धारित करें।

  1. 11 A
  2. 4 A
  3. 12.5 A
  4. 6.25 A

Answer (Detailed Solution Below)

Option 4 : 6.25 A
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Detailed Solution

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संकल्पना:

किसी रिले के प्लग समायोजन गुणक को द्वितीयक दोष धारा से पिक-अप धारा के अनुपात के रूप में परिभाषित किया जाता है।

PSM = द्वितीयक दोष धारा / रिले धारा समायोजन

पिक-अप धारा या संचालन धारा = (CT में रेटेड द्वितीयक धारा) x (धारा समायोजन)

गणना:

दिया है कि,

धारा समायोजन = 125% = 1.25, रेटेड द्वितीयक धारा = 5 A

इसलिए, रिले की संचालन धारा = 5 x 1.25 = 6.25 A

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