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5 Common Mistakes in Battery System Capacity Testing

5 Common Mistakes in Battery System Capacity Testing

IEEE and NERC both require battery capacity testing as a means of predicting a battery system’s ability to perform when called upon during a loss of AC power, for acceptance of new installations, and in determination of end of life criteria for system replacement. While NERC is very vague and just states that “Capacity testing must be done at said interval”, IEEE 450, 1106 and 1188 have clearly defined frequencies, prerequisites and instructions on how these tests should be conducted.

From results that are submitted to us for warranty consideration or review, a group of common errors have come to light. Below are the top 5 most common mistakes that are seen in capacity testing.

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Part 1: Can your generation plant survive an unplanned or emergency trip without sustaining major damage?

Part 1: Can your generation plant survive an unplanned or emergency trip without sustaining major damage?

INTRODUCTION

Good question, and one your insurance company or investors are likely to ask and want documentation on.

The heart of the safety system that allows for an orderly and safe generating unit shutdown is the station battery and associated DC system. The generating unit will sustain major or even catastrophic damage if the station battery and associated DC system fail to perform as specified in the system design criteria.

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