What is Site Acceptance Testing?

What is a SAT or Site Acceptance Test?

A Site Acceptance Test, or SAT for short, is a process, typically conducted at the customer’s site, to ensure the supplied equipment is fit for purpose and meets the technical criteria necessary to ensure safe and effective performance once energised.

The SAT ensure that nothing has changed during transport from the factory to the end user. The measured values during the SAT can be compared and should be within close range of the test results supplied during the manufacturing process or at the Factory Acceptance Test (FAT).

What makes up a Site Acceptance Testing?

The SAT is performed at the customer’s location to verify the equipment’s specifications meet the buyer’s requirements and relevant technical standards. During a typical delivery phase in a contract the Bowers team will:

Attend the customers’ site and supervise the offloading of the transformer onto a suitable plinth or base.

site acceptance testing - transformer being offloaded

Carry out basic LV testing compromising:

    • Ratio Test – Transformer turns ratio test determines the ratio of the high voltage winding to low voltage windings. The turns ratio test is performed on all tap positions and every phase of the transformer using a Ratiometer.
    • Megger Test – Insulation resistance test that will verify the insulation resistance of the windings using a 5kV Megger. Comprising: HV – Earth 5kV LV – Earth 1000V HV- LV 5kV tests.
    • Doctor Test – Contact resistance test which detects the resistance of the windings and connections using the Low Ohms Ductor test.

Where relevant, take a liquid sample for moisture and dielectric test.

Supervise an agreed set of site commissioning and tests.

Undertake and record a detailed final visual inspection.

Site Acceptance Test (SAT) vs Factory Acceptance Test (FAT)

As the names would suggest the difference between tests is the location in which the tests take place, one is in the factory where the product is supplied from and the second is the site in which the product is being installed.

SAT Testing demonstrates that nothing has changed during transport and positioning from the FAT.

The benefits of Site Acceptance Testing: 

Ensures the equipment meets the customer’s full requirements. 

Allows the customer to check over the transformer and check that any auxiliary equipment is correct.

An additional level of quality checking.

The SAT guarantees the quality of the equipment when it has arrived on site. 

Improves the communication between the customer and the supplier.

By having the customer participate in the SAT process, the customer can provide feedback on the transformer and help ensure it meets their requirements.

Bowers Electricals Site Service and Maintenance team offer full on-site maintenance and support of all your electrical plant and power equipment and provides ongoing support 24 hours a day, 365 days a year.

Our team of engineers are available to perform Site Acceptance Testing on any new Bowers Electricals Transformers being delivered to sites all across the UK.

Sounds like an addition that will benefit your project? Contact our team here.

You can also follow Bowers Electricals on Linked In here.

Posted on: 28.05.2024
Posted in: Services Transformers,
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