ISOUSB111: How to measure differential leakage current?（IEC60079-11:2023, Section 7.10.2）

Shinichi Inoue

Guru 21646 points

Part Number: ISOUSB111

Tool/software:

Dear Specialists,

My customer is still interested in ISOUSB111.

They are considering measuring the differential leakage current themselves.

If it is less than 50μA, they would like to continue considering it.

Could you please let us know how to measure differential leakage current?

（IEC60079-11:2023, Section 7.10.2）

I appreciate your great help in advance.

Best regards,

Shinichi

3 months ago

0 Varun Kumar 3 months ago

TI__Expert 7495 points

Hi Shinichi

Thanks for pushing ISOUSB111 to the customers.

I believe this to be a continuation from this e2e post few months back : https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1465849/isousb111-does-isousb111-comply-with-the-explosion-proof-standard-iec60079-11-2023-section-7-10-2

Shinichi Inoue said:
Could you please let us know how to measure differential leakage current?

The Measurement Setup for Differential Leakage measurement for isolators is mentioned in the IEC60079-11(2023) Standard Document itself under 9.9:

The Setup is pretty straight forward but if the customer still has any questions, feel free to reach out. Keep us posted on the leakage numbers observed.

Regards
Varun

0 Shinichi Inoue 3 months ago in reply to Varun Kumar

Guru 21646 points

Hi Varun,

Thank you for your reply and sending the information.

Exactly.

The customer likes the ISOUSB111 and is considering measuring it himself.

I have shared the specifications you sent( IEC60079-11(2023) Standard 9.9) with the customer.

When the customer has an additional question, I consult you again.

Also I'll share the measurement result I could obtain.

I appreciate your great help and cooperation.

Best regards,

Shinichi

Isolation

Isolation forum

ISOUSB111: How to measure differential leakage current?（IEC60079-11:2023, Section 7.10.2）