3 Position Rotary Switch p/n etc?

[MVCaprice]

I am having some shore power issues and I think it's the rotary. I had a high load dock power issue last night (3 ac units + block heaters etc) and popped short power. Only problem was that there was still power at the panel via the indicator and the 220volt light, but no pass through to the sources. The Generator position on the Rotary seems to work fine.

I am fairly certain its the rotary switch. Anyone have a part number for this 3 position switch ( I assume that is what it is?). I assume its a Krause Naimer like most Hatteras boats, but figured I would ask and post up about it.

 

[SKYCHENEY]

Those are not cheap. You had better make sure that is your problem before you buy a new one.

 

[DCMY #92]

These switches have stacked contact modules that can be removed and replace. On some the contacts are visible. If one or more contacts are burned or damaged you should be able to see it. I have a couple I removed when I installed the new breaker panels if you need parts.

 

[Boatsb]

I have a 50 amp takeout I posted a while back.

I'll look for it in the shop. I'm pretty sure I didn't sell it.

 

[MVCaprice]

I’m going to take a closer look at it tommorrow and if it’s burnt I’ll post pics. Once I get the panel out some quick continuity checks should find the problem. It’s also possible it’s the breaker. Also I assume this switch is 100amp though as it’s a 20kw genset.

 

[piripucha]

Take a look at the fuses first, if the 53 is like the 58 YF the may be in the engine room.

 

[MVCaprice]

I took a closer look today. Here is what I tried and found:

1) Replaced 50Amp slow burn fuses next to 50Amp inlet. No luck
2) Checked Source 2 shoreline B. Same situation where there is power light and 220volt but no passthrough.
3) Pulled panel and checked source 2 50Amp breaker for shoreline a and it had continuity.
4) checked the C105 A212 switch for continuity through both positions on all three terminals and there was continuity.

I am a bit stumped now. Because both shorelines are affected I am somewhat convinced its not the 50amp shore breakers. However because it looks like there is continuity across the Krause switch it seems like that is not the problem, but it has to be!?



Also its definitely a 100Amp rotary switch and not a 50Amp.

 

[MVCaprice]

I just did some research and it looks like the C80 A212 maybe the updated part for the rotary. The c105 is no longer made. I’ll need to research a bit more.

 

[SKYCHENEY]

If gen power okay and not with shore power, what about the isolation transformer? Then gen power does not go through the transformer.

Also, do you have the breakers in the Engine room to run 120v 50a inlet power? It may be at one of those breakers which switches the taps on the isolation transformer.

My boat is a 1985. I like the setup on my friends 1978 as he has indicator for voltage for transform in and transformer out. Mine does not. The volt gauge at the main panel only shows voltage coming in from shore.

 

[MVCaprice]

If gen power okay and not with shore power, what about the isolation transformer? Then gen power does not go through the transformer.

Also, do you have the breakers in the Engine room to run 120v 50a inlet power? It may be at one of those breakers which switches the taps on the isolation transformer.

My boat is a 1985. I like the setup on my friends 1978 as he has indicator for voltage for transform in and transformer out. Mine does not. The volt gauge at the main panel only shows voltage coming in from shore.

Thanks for the feedback! I'll take a look ASAP.
​

I don't think i have any input breakers in the engine room. I have one source sub panel under the seat at the help and two in the engine room. The feed breakers are all in the main panel that I showed pictures of, although i will double check. I'll post some pics of them in case others with a 61MY have this issue.

One thing I am unclear on though is how the shorelines would be working with Source 1 if there is an isolation transformer issue. Perhaps there is one isolation transformer for each Source. Easy enough to check though!

 

[racclarkson@gmail.com]

Thanks for the feedback! I'll take a look ASAP.
​

I don't think i have any input breakers in the engine room. I have one source sub panel under the seat at the help and two in the engine room. The feed breakers are all in the main panel that I showed pictures of, although i will double check. I'll post some pics of them in case others with a 61MY have this issue.

One thing I am unclear on though is how the shorelines would be working with Source 1 if there is an isolation transformer issue. Perhaps there is one isolation transformer for each Source. Easy enough to check though!

I would be very surprised if you didn't have a 50A breaker at the point your shore power enters your boat. As they age, they get weaker.

 

[MVCaprice]

I would be very surprised if you didn't have a 50A breaker at the point your shore power enters your boat. As they age, they get weaker.

Right. That is not the case. Sorry I wasn't clear. The path looks like this:

Hubbel "Source" connector -> two 50 Amp slow burn fuses -> Interior Distributon Panel -> 50Amp (220v) Breaker -> Rotary switch -> triple load panels -> Triple 70amp Breaker (with neutral as well) -> Sub Panels in Engine room and under pilot house (no input breaker IIRC)

 

[SKYCHENEY]

Each source has its own isolation transformer. Get out your wiring schematics and look at what is on there. You should also have breakers on Source 2 for the 120v 50a inlet that is under the two 240v inlets on each side of the boat. Those breakers are somewhere. Mine are in the stbd engine room. I'm not sure where they are located on a 61.

You may want to pull the cover on the transformers and check the input and output voltages there (primary and secondary).

Test across terminals X1 and X2 and compare to voltage across H1 and H2.

 

[MVCaprice]

Well all said and done it was the breaker in the generator compartment isolator panel where there are two 50amp breakers that were popped. I am very relieved that it wasn't rotary switch!

 

[racclarkson@gmail.com]

Well all said and done it was the breaker in the generator compartment isolator panel where there are two 50amp breakers that were popped. I am very relieved that it wasn't rotary switch!

That's good news. Be aware that when those breakers start load tripping, they'll likely do it again and again especially if they are original. It was a bitch finding the right ones for my boat.

 

[MVCaprice]

That's good news. Be aware that when those breakers start load tripping, they'll likely do it again and again especially if they are original. It was a bitch finding the right ones for my boat.

I hear you. I would expect the slow burn fuses to go first. On source 1 they did. It seems that on our boat source 1 may not be on the isolation transformer!? On the other hand I had a ton of load. 4 A/C units and 3 space heaters and was not paying attention. I also am reasonably sure that I have a bad compressor on the master A/C which was pulling ridiculous amounts of load on ships service 3. It was avoidable.

Where did you source the breakers from? I may get a spare or two!

 

[racclarkson@gmail.com]

You'll need to get the numbers off what you've got. No one had mine, but I found one on E-bay.

 

[MVCaprice]

You'll need to get the numbers off what you've got. No one had mine, but I found one on E-bay.

Do you know if they are common with the other 50 amp panels?

Check this out:

http://www.airpax.net/pdfs/209.pdf

My main panel had a P/N of "50-50-2-63-1" which is how I found it.

 

[SEVEN]

Don’t forget to ask Sams. If they don’t have them they can help direct you. You’re lucky.

 

[racclarkson@gmail.com]

Thanks for the feedback! I'll take a look ASAP. ​

I don't think i have any input breakers in the engine room. I have one source sub panel under the seat at the help and two in the engine room. The feed breakers are all in the main panel that I showed pictures of, although i will double check. I'll post some pics of them in case others with a 61MY have this issue.One thing I am unclear on though is how the shorelines would be working with Source 1 if there is an isolation transformer issue. Perhaps there is one isolation transformer for each Source. Easy enough to check though!

Do you know if they are common with the other 50 amp panels?Check this out:http://www.airpax.net/pdfs/209.pdfMy main panel had a P/N of "50-50-2-63-1" which is how I found it.View attachment 24611

Not the same. Given age of our boats, lots of opportunities to modify. Google pn and see what you get.