Testing an existing ATS

[warraich]

Hi Everyone,

I’m currently working on a project where we are installing a standby generator in a dedicated room within an existing sewage lift station building. The existing MCC is equipped with an ASCO 7000 Automatic Transfer Switch, and the new generator will be a Cummins model. I have attached a photo of the transfer switch controls and indicators.

Before the generator is connected and commissioned, I want to test the functionality of the ASCO 7000 ATS. Could anyone advise on how to properly test or simulate the ATS operation without having the standby generator physically connected?

Any tips on safely verifying the ATS logic, transfer mechanism, and start signals would be greatly appreciated!

Thanks in advance.

 

[warraich]

Hi Everyone,

I’m currently working on a project where we are installing a standby generator in a dedicated room within an existing sewage lift station building. The existing MCC is equipped with an ASCO 7000 Automatic Transfer Switch, and the new generator will be a Cummins model. I have attached a photo of the transfer switch controls and indicators.

Before the generator is connected and commissioned, I want to test the functionality of the ASCO 7000 ATS. Could anyone advise on how to properly test or simulate the ATS operation without having the standby generator physically connected?

Any tips on safely verifying the ATS logic, transfer mechanism, and start signals would be greatly appreciated!

Thanks in advance.

Is the simplest thing to turn the utility breaker feeding the ATS off and see if the ATS attempts to transfer? Then turn the breaker on to confirm if the ATS retransfers? Will this be sufficient?

 

[hillbilly1]

Is the simplest thing to turn the utility breaker feeding the ATS off and see if the ATS attempts to transfer? Then turn the breaker on to confirm if the ATS retransfers? Will this be sufficient?

I believe the op is saying there is not an existing generator, and this is a new install with existing transferswitch.

 

[hillbilly1]

Hi Everyone,

I’m currently working on a project where we are installing a standby generator in a dedicated room within an existing sewage lift station building. The existing MCC is equipped with an ASCO 7000 Automatic Transfer Switch, and the new generator will be a Cummins model. I have attached a photo of the transfer switch controls and indicators.

Before the generator is connected and commissioned, I want to test the functionality of the ASCO 7000 ATS. Could anyone advise on how to properly test or simulate the ATS operation without having the standby generator physically connected?

Any tips on safely verifying the ATS logic, transfer mechanism, and start signals would be greatly appreciated!

Thanks in advance.

From the sound of it, existing switch was for a rollup generator. The only way to test it is to have voltage on source 2, which could be a small roll up generator, with all loads turned off, then turn main off.

 

[garbo]

At the large hospital that I retired from they had over 70 ATS,switches . Most were ASCO brand. When they performed yearly cleaning & testing of them the ASCO Tech's would disconnect one of the two generator start buttons while performing yearly PM'S.