FREQUENTLY ASKED QUESTIONS

ONESTEP POWER'S GENERATOR VOLTAGE RESPONSE TESTER

How does the GVRT work?

The GVRT takes control of the field winding of the generator. This allows us to control the output voltage of the generator. For more details click here to go to the GVRT section of our website.

Can it be permanently Installed?

The GVRT is not designed for permanent installation.

What are the benefits?

It is fast, no interpretation required it takes the guesswork out of testing providing an exact answer. For more details click here. 

What are the risks?

We have removed human intervention during testing which actually reduces the risks inherent in power management system testing.  All power management system testing holds some risk. OneStep Power do not test on vessels connected to live wells. There is a potential for blackout and other power related risks if the vessel fails a test.

 

The GVRT itself has been threat assessed as part of technology qualification and the risks mitigated.

How long does it take to do the testing?

The tests generally take between 150ms to 5 seconds depending on the test. Generally, it will be 1 day for set up, 1-2 days for testing and 1/2 day to remove the equipment. Times can increase depending on permitting and access.

How soon can you mobilize to a vessel?

 A facility-specific program needs to be developed and engineered for the vessel before testing can commence. This program will take approximately two weeks once the required information has been provided.

What information is needed to make a test program for the GVRT?
  • General Arrangement

  • Single Line Diagram

  • Protective Relay Coordination Study

  • Short Circuit Calculation

  • DP FMEA & Test Program

  • Connection diagrams 

  • Load list

  • Generator datasheets

  • Photos of connection points

What testing can be performed with the GVRT?

As there is a great call for it, our main focus at present is:

  • Voltage dip ride-through testing

 

We are also able to provide:

  • Loss of field,

  • Loss of sensing,

  • High-speed circuit breaker switching

What if my power system fails the test?

If required, we have the ability to assist in figuring out why it failed. If further testing is required after rectification works, the test program for your vessel is ready to be performed again.

How much does a test program cost?

There is a fee for the development of a vessel-specific Onsite Test Plan and a fee for site testing. The fees vary depending on the vessel size and type.

 

Please contact us so we can provide an accurate quotation for your vessel.

Is there a discount for repeat testing?

Yes, provided there are no changes to the vessel requirements, the vessel-specific testing program only needs to be developedonce per vessel, therefore that portion of the cost will not be required for subsequent tests on that vessel.

What other services does OneStep Power provide?

We are happy to discuss all your power needs.

  • Validation/Testing Development & Review

  • Closed Bus Equivalent Integrity

  • Post-Failure Solutions

  • Software & PLC Programming & Support

  • Project Support, Commissioning & Reactivation

1.   How does the GVRT work?

It takes control of the field winding of the generator. Which allows it to adjust the output voltage of the generator. For more details click here to go to the GVRT section of our website.

2.   Can it be permanently installed?

The GVRT is not designed for permanent installation.

3.   What are the benefits?

It is fast, no interpretation required it takes the guesswork out of testing. The GVRT provides an exact answer, for more details click here to go to the GVRT benefits section on the website.

4.   What are the risks?

We remove human intervention during testing which actually reduces the risks inherent in power management system testing.  All power management system testing holds some risk. OneStep Power does not test on vessels connected to live wells. Should a vessel’s power system fail to ride-through the testing there is a potential for blackout and other power-related risks.

 

The GVRT itself has been threat assessed as part of technology qualification and the risks mitigated.

5.   How long does it take to do the testing?

The tests generally take between 150ms to 5 seconds depending on the test. Generally, it will be 1 day for set up, 1-2 days for testing and 1/2 day to remove the equipment. Times can increase depending on permitting and access.

6.   How soon can you mobilize to a vessel?

A vessel-specific program needs to be developed and engineered for the vessel before testing can commence. This program will take approximately two weeks once the required information has been provided.

7.   What information needs to be provided to make a test program for the GVRT?

A vessel-specific testing program must be developed and engineered for each vessel. This requires:

  • General Arrangement

  • Single Line Diagram

  • Protective Relay Coordination Study

  • Short Circuit Calculation

  • DP FMEA & Test Program

  • Connection diagrams 

  • Load list

  • Generator datasheets

  • Photos of connection points

8.   What testing can be performed with the GVRT?

As there is a great call for it, our main focus at present is:

  • Voltage dip ride-through testing

 

We are also able to provide:

  • Loss of field,

  • Loss of sensing,

  • High-speed circuit breaker switching

We are also looking to include the following at a later date to add value to our core product:

  • Undervoltage,

  • Overvoltage,

  • KVAR imbalance,

  • Total harmonic distortion.

9.   What if my power system fails the test?

If required, we have the ability to assist in figuring out why it failed. If further testing is required after rectification works, the test program for your vessel is ready to be performed again.

10. How much does a test program cost?

There is a fee for vessel-specific program development and a fee for site testing. The fees vary depending on the vessel size and type.

 

Please contact us so we can provide an accurate quotation for your vessel.

11. Is there a discount for repeat testing?

Yes, provided there are no changes to the vessel requirements, the testing program only needs to be developed once per vessel, therefore that portion of the cost will not be required for subsequent tests on that vessel.

12. What other services does OneStep Power provide?

 

We are happy to discuss all your power needs.

  • Validation/Testing Development & Review

  • Closed Bus Equivalent Integrity

  • Post-Failure Solutions

  • Software & PLC Programming & Support

  • Project Support, Commissioning & Reactivation

Visit our Engineering solutions page to find out more.