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How to Test Bimetalic Overload Relay Made by Sneider Electric?

02/24/2012 3:14 AM

Hii everyone i'm santosh , i want to test a BIMETALIC OVER LOAD RELAY but i know how to test it , it having name plate details like this I = 9-13A and it is having a plug type setting like 9,11,13 and no time is mentioned , plz anyone can help me , this my first post in this thread i think i will get reply ?

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#1

Re: How to test bimetalic overload relay made by sneider electric ?

02/24/2012 3:37 AM

Well most of these I think have a test button usually red, and are classed 10,20,30, the class indicating the number of seconds for the breaker to trip out....If you have the part number I can probably give you specific info...I think this link is the one you have, it's trip time is listed 6 - 20 seconds...It's listed as LRD16

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#2
In reply to #1

Re: How to test bimetalic overload relay made by sneider electric ?

02/24/2012 3:54 AM

@solareagle thanks for u'r comment , the specific model is LRD06

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#4
In reply to #2

Re: How to test bimetalic overload relay made by sneider electric ?

02/24/2012 4:13 AM

Here it is, it's the same...

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#3

Re: How to test bimetalic overload relay made by sneider electric ?

02/24/2012 4:02 AM

As you mentioned it has 9-13A setting this is nothing but the allowable current setting through LRD. you can adjust the knob any where between 9-13. let say knob is at 10 it means the LRD will break the circuit when current following through it goes beyond 10A.

For test you can connect different loads to LRD and gradually increase the load it should trip the circuit as drawing current goes beyond 10A. This is what you can do at your end.

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#5

Re: How to Test Bimetalic Overload Relay Made by Sneider Electric?

02/24/2012 1:27 PM

When you say "test", what do you specifically mean? Do you intend to test the functionality of the auxilliary contact in terms of it dropping out the contactor? Or are you wanting to test the thermal trip point of the bimetal element inside?

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#6

Re: How to Test Bimetalic Overload Relay Made by Sneider Electric?

02/25/2012 2:43 PM

To my understanding, the Bimetalic Over Load Relay, are settings to protect the motor, if it locks over 6 times its rla, if the motor at its inrush, does not return to its normal operation, then the circuit will open. I belive that there is no way you can test, only if the CB has a Testing Button, that will indicate that the relay is working.

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#7

Re: How to Test Bimetalic Overload Relay Made by Sneider Electric?

03/12/2024 8:22 AM

A <...test...> without a previously established pass/fail boundary, is merely a measurement. The test protocol document, established beforehand, should give details of what is required of the test, for the Tester to follow and report.

Why is a <...test...> taking place if none of that has been determined beforehand (rhetorical question - NNTR)?

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