Jimrody
Hi Everyone,

Is anyone familiar with the MEN (Multiple Earth Neutral) connection supply system and how it is connected into the Generac ATS?

The generator is a Generac 22kw, bought recently. The ATS is a single phase 200A service switch

Thanks in advance for your inputs.
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Birken Vogt
What country, what voltage, what code?
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george6488
He is on an island...... The Island is Antigua and Barbuda in the Caribbean....
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george6488
This was his post on the DIY forum and I suggested he come here:



Anyone here ever heard of a single phase 220 volt 2 wire utility supply, one live and the other neutral, and the neutral bonded to ground at the service switch panel? This is the case on the island where I live.

Most utility companies in the USA, in contrast, provide a 3-wire supply i.e. 2 live conductors and a ground, where 240 volt exists between both live conductors and 110 V measured between each live conductor and neutral.

I've just bought a 22 KW guardian series Generac generator and it comes with an ATS, having a 200A service switch.

The utility lugs at the service switch in the ATS enclosure are labelled N1 and N2. I plan on connecting the live (remember I'm referring here to the 220 V system that exists on my island) to N1 and the neutral to the neutral bar provided at the ATS and bond the neutral and ground bars.

I observe there exists what appear to be signal/sensor wires connected to both N1 and N2 .

I reiterate, if the ATS was installed in the USA these 2 signal/sensor wires connected to N1 and N2 respectively, would be fed 120 V each with respect to ground.


My question: Will my stated method of hook-up for the 2 wire (1 live and 1 neutral), 220 v system as per above, result in frying the control circuitry of the ATS or worse, the generator control circuitry? Especially to you guys familiar with the Generac ATS What could be a possible down side and what recommendations would you offer in helping me avoid such an eventuality/catastrophe?
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Birken Vogt
It is a bit of a difficult situation because normally you would want an "international" generator and transfer switch for 230V 2 wire service but you also are 60 Hz, not 50 Hz.

Beware of unintended consequences. Do at your own risk. Contact Generac for ideas also.

It looks like if you feed 230 V into N1/N2, it would sense and switch correctly. Some modification required to the transfer switch. No current flowing in the N2/T2/E2 side.

You would also need to modify how the battery charge T1/00/T2 gets its power but it appears it can handle 240 volts at least.

Leave the 22/33 unconnected to system neutral and remove the battery charge neutral from that and hook to system neutral.

Bypass the second side of the generator main breaker to keep neutral solid to the system.

There may be something I am missing. I would want to be on site to do this.
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Jimrody
Connecting a Generac ATS to an MEN supply system

Jimrody;52969 wrote:
Hi Everyone,

Is anyone familiar with the MEN (Multiple Earth Neutral) connection supply system and how it is connected into the Generac ATS?

The generator is a Generac 22kw, bought recently. The ATS is a single phase 200A service switch

Thanks in advance for your inputs.


Thanking you guys for the the suggestions/contributions you're making. I do appreciate your inputs

Jim
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Jimrody
Connecting a Generac ATS to an MEN supply system

Anything from the guys at Generac frequenting this forum?
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Jimrody
RE: Connecting a Generac ATS to an MEN supply system

Birken Vogt;52973 wrote:
It is a bit of a difficult situation because normally you would want an "international" generator and transfer switch for 230V 2 wire service but you also are 60 Hz, not 50 Hz.

Beware of unintended consequences. Do at your own risk. Contact Generac for ideas also.

It looks like if you feed 230 V into N1/N2, it would sense and switch correctly. Some modification required to the transfer switch. No current flowing in the N2/T2/E2 side.

You would also need to modify how the battery charge T1/00/T2 gets its power but it appears it can handle 240 volts at least.

Leave the 22/33 unconnected to system neutral and remove the battery charge neutral from that and hook to system neutral.

Bypass the second side of the generator main breaker to keep neutral solid to the system.

There may be something I am missing. I would want to be on site to do this.


Birken,

Would you have a wiring diagram of the ATS (RXSW200A3) at your disposal to share, so that I can follow along and attempt the modifications you are suggesting?

When you say "It looks like if you feed 230V into N1/N2..." Do you really mean N1 or N2, as you later suggest that I leave one side of the breaker vacant and tied the neutral solid?

Jim, in anticipation of your reply
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