Foreign project - FAT factory undergoing testing

For FAT Factory Acceptance Test, as a part of the ISO file system, the factory test documents are generally conducted according to the IEC standard factory test items, including special requirements for customer requirements, particularly strengthening the secondary system function inspection.

Standard format files generally include the following content:

Scope Scope The Mandatory Routine tests (refer clause 7 of IEC 62271-1 and IEC 62271-200) are as follows

The mandatory routine tests are as follows (refer to Chapter 7 of IEC 62271-1 and IEC 62271-200) Preparation before Test

Prepare EHS requirements before testing

safety requirements

List of inspection Item, standard and testing equipment

List of testing items, standards, and testing equipment

FAT test procedure FAT

Dielectric test on the main circuit

Measurement of the resistance of the main circuit through dielectric testing

Design and visual checks for measuring the resistance of the main circuit

Mechanical operation tests for design and appearance inspection

Mechanical operation testing Tests on Auxiliary and control circuits & Test of auxiliary electrical devices(interlocks) 

Auxiliary and control circuit testing and auxiliary electrical device testing (lockout) Bus bar inspection

Busbar inspection Protection level inspection

Protection level inspection

Foreign projects will pay attention to the performance parameters of components, such as the mechanical performance of circuit breakers, opening and closing time, as well as the phase sequence, inflection point voltage, and other parameters of current transformers and voltage transformers. The parameters will be verified through a current injection test, and the system function will be verified, such as the parameter setting verification of microcomputer protection devices and the accuracy of actions.

There are also requirements for surface spraying, thickness, color difference, copper bar material inspection, conductivity measurement, and silver plating thickness measurement. These require spot checks and confirmation of incoming inspection reports. If inconsistencies are found, more items may need to be inspected, which may affect integrity.

FAT Test report FAT 

The test report FAT report is officially archived and retained by the customer.

It is recommended that the manufacturer first complete the testing and verification of key factory projects on their own, such as power frequency withstand voltage, appearance inspection (surface spraying, label identification), circuit breaker rocking in and out, grounding switch operation and interlocking verification, to ensure that everything is foolproof and avoid problems in front of customers, which may affect the company's image in production management, quality control and other aspects, causing a lack of trust and inability to obtain subsequent projects.

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