Type Tests

That's what type test means - Testing is done on one unit which represents the common design for a "type" of equipment, and the results are valid for all the units of that "type." Thus the use of the word "typical" to mean valid for all of a certain type.

Thanks. I will register and give GA.

If you mean whether all type tests are to be carried out on the SAME sample, the answer is no. For example, a LV circuit breaker needs to be tested as per IEC 60947-1&2, where at least 4 test sequences are to be followed to certify the Circuit Breaker. Normally 4 to 6 samples undergo different tests.

Ok. I understand. Where can I find the supporting documents including the standards as like clause no etc?..Just give me a hint. I will find out. I have to support supplier to fight with consultant

i already gave - IEC 60947- part 1 and 2 for Circuit Breakers. If you are in India, you can use IS 13947 - 1 and 2 which are identical and far cheaper. You can also ask CPRI and ERDA, who are testing authorities in India.

One advice - never fight with a consultant. He can always throw a spanner in the works.

KVS, I think IS 13947 is renamed (or is it re-numbered) as IS 60947, to be in line with IEC. Pl. confirm. I very recently received a mail from my seniors in this regard.

As per your suggestion, I read the following standards in the last three days.

1.IEC 60947-part 1 LV switchgear - geberal

2.IEC 60947-part 2 - Circuitreakers.

3.IEC 60694-Highvoltage switchgear and control

and the below mentioned Type Test standards

4. IEC 61436 part 1 to 7 for LV switchboards, Busbars.etc

5. IEC 60227-200 for MV switchgear.

I could not find (or understand) anywhere it said that multiple samples are required mandatory for type testing.

Sir, could you give me more clarification on this reagrds.

i give a small extract of Table X of IS 13947-2. You will notice that tests are specified on sample 1, sample 2 etc. This is a small part of the table, you will get more data from the IEC.

Thank you. I saw almost similar to this in IEC.