question

john-strein avatar image
john-strein asked

Why no Torque specs from Victron on bolts on their equipment?

I bought a Smart Shunt that has "beefy" M10 bolts for the electrical connections. No where in the manual is there a torque spec for these bolts. Furthermore, a search on this forum reveals others have requested a torque value for this device and other Victron components and not gotten any official responses from the company representatives.

So, given most of these questions were asked a couple years ago I am asking again. What value should I torque these bolts to? There has to be some sort of range that is acceptable. Can anyone answer this question?


SmartShunt
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3 Answers
wkirby avatar image
wkirby answered ·

Sometimes with these components, not even the OEM lists these specifications. Since they are just brass blots, then standard tourque values would apply. M10 brass bolts, 20Nm is a good ballpark.

I did find one OEM who does have the torque values in their datasheet.
Check out a similar sized shunt from muRata (500A/50mV):
1647034366242.png

Seems to agree, with 19-20Nm for a 3/8 inch - which sounds like an American size to me and so would be equivalent to standard M10 size.

Taken from muRata shunt manual here:
https://docs.rs-online.com/18e7/0900766b813bb936.pdf


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Trevor Bird avatar image
Trevor Bird answered ·

7694659b-472e-4ee2-af0f-f5825049f5ae.pngThis is a Victron Specification. I googled Victron Torque settings..





7694659b-472e-4ee2-af0f-f5825049f5ae.png (421.9 KiB)
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Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @john strein

I have made it a pet project to see that all torque specs are in all product manuals. So if anyone sees any others missing, please make a new post and let me know.

The torque spec for the SmartShunt M10 is here - https://www.victronenergy.com/media/pg/SmartShunt/en/installation.html#UUID-3eae5fe6-4e6d-4a9b-f3b7-13808b83552d

Moderation note - I cleaned up a few of the other posts to make this answer clearer.

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Brian Finley avatar image Brian Finley commented ·

Hi Guy -- it would be awesome to have one place to go for all Victron torque specs for all products.

I'm trying to find the torque specs for the Autotransformers, including the chassis ground bolt, and can't find them anywhere...

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andy156 avatar image andy156 commented ·

I installed an RS450/100, Quattro 10000. It seems that the maximum torque is often listed. The 450/100 has a solar input torque but nothing for the main DC connections.

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bartrs avatar image bartrs andy156 commented ·
@Andy156 RS450/100, page 7 of the manual. DC bolts: 14Nm.
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andy156 avatar image andy156 bartrs commented ·
Unfortunately that's a maximum not an actual.
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