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Posted: 2024-08-14 12:11 AM
Hi,
What is the preferred method of performing the Automatic Trip Curve tests (secondary injection test) on NSX 630A MCCBs with Micrologic 2.3 trip units, as the Service Interface kit does not seem to support connectivity with the trip?
I seem to remember in the very recent past that I was able to carry out the test prior to a firmware upgrade on the SIK.
Thanks for any assistance,
Brian Whelan
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Posted: 4 weeks ago
Hi Brian,
The preferred method for performing the Automatic Trip Curve tests (secondary injection test) on NSX 630A MCCBs with Micrologic 2.3 trip units, is via Service interface kit.
User experience on SIK Connectivity issue may be due to below reason
1. LED's on Service interface may not blink due to Communication loss from Breaker cable to Service interface.
2. LED's on Service interface may not blink due to Communication loss from USB cable to Computer through SIK(Service interface kit).
3. Front plug pins damaged which provides connection from Breaker to SIK, Due to Which Breakers will not get connected.
4. Kindly check USB ports of the Computer is not blocked due to Security Concern.
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Posted: 4 weeks ago
Hi Gopi,
Thank you for the reply. Unfortunately, although the SIK works perfectly well with any Micrologic 5 and higher trip units, I simply cannot connect to the older Micrologic 2.3 type trips, which we are using on many NSX 630A MCCBs at the moment.
The connection seems to be fine to the MCCBs when trying to discover them with EPC, the LED flashes on the trip as per normal, but running the Discover Serial devices page discovers the SIK itself no problem, eliminating an issue with the USB connectivity, but when I continue to try to Find Devices, I continually get No Device found. As a sanity check, I try connection with MCCBs with Micrologic 5 trip units and the connection is perfect, the Find Device function works immediately.
Resorting back to the older USB Maintenance Module TRV00911 and the antiquated LTU software can connect to the MCCBs, but this is far from ideal as operation of this is sporadic in nature and the process quite lengthy to continue, especially with volumes of secondary injection testing required.
I seem to remember that the SIK did actually work previously with the 2.3 trips, but not since upgrading the SIK firmware to version 001.001.040.
I would appreciate any other suggestions and thank you in anticipation,
Regards,
Brian
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Posted: 3 weeks ago
Hi Brain,
Kindly share the application log file, i can trouble shoot from my end.
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Posted: yesterday
Hi Gopi,
I was wondering if there is any update to my query after submitting the logs as requested. We are now seeing quite an issue when trying to use the Service Interface Kit on site to carry out maintenance on MCCBs and our engineers are having to resort to using the older Maintenance Module kit which, albeit it dreadfully slow and tedious to use, does work, but its adding so much time to the procedures.
Basically the older Micrologic trip units, such as 2.3, etc., are not working at all with the SIK, but Micrologic 5 and 6 trips work perfectly.
We do need a solution as soon as possible.
Regards,
Brian
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