GE GEK-106465A Visual Inspection, General Considerations on the Power Supply Network

ACCEPTANCE TESTS

6. ACCEPTANCE TESTS

6.1.VISUAL INSPECTION

Verify that the relay has not suffered any damage during transportation, and that all screws are correctly fixed, and all relay terminal boards are in good condition.

6.2.GENERAL CONSIDERATIONS ON THE POWER SUPPLY NETWORK

All devices running on AC current are affected by frequency. As a non-senoidal wave is the result of a fundamental wave plus a series of harmonics from this fundamental wave, it can be deducted that devices running on AC current are influenced by the applied waveform.

For a correct testing of devices running on AC current, it is fundamental to use a current and/or voltage senoidal waveform. The pureness of a senoidal wave (lack of harmonics) cannot be expressed specifically for a specific device. However, any relay incorporating sintonized circuits, R-L and R-C circuits, will be affected by non-senoidal waveforms.

These devices respond to the voltage waveform in a different way to the majority of AC current voltmeters. If the power supply network used for the testing contains wide harmonics, the voltmeter and relay responses will be different.

When the device is tested, a power supply network with no harmonics in its waveform must be used.

It is important to point out that the accuracy with which the test is performed depends on the network and on the instruments used. Functional tests performed with unsuitable power supply network and instruments are useful to check that the device operates properly and therefore its operating characteristics are verified in an approximate manner.

The following sections detail the list of tests for verifying the device functionality.

GEK-106465A CIO Remote CAN Digital I/O Module 39