AC Supply Source Considerations
PowerFlex®
drive products and bus supplies are suitable for use on a circuit capable of delivering up to a maximum of 100,000 rms symmetrical amperes at 400/480V and 65,000 rms symmetrical amperes at 600/690V.PowerFlex®
drive products and bus supplies must not be used on undersized or high-impedance supply systems. The supply system kVA must be equal to or greater than the product-related kW, and the system impedance must be less than 10%. Operation outside these limits can cause instability and product shutdown.System Impedance = (kVA ÷ Transformer kVA) x Transformer % Impedance
You must account for the kVA of all
PowerFlex®
drive products and bus supplies on the distribution system and the system impedance of upstream transformers.
ATTENTION:
Risk of injury or equipment damage exists.
To guard against personal injury and/or equipment damage that is caused by improper
fusing or circuit breaker selection, use only the recommended line fuses/circuit
breakers.
If a Residual Current Detector (RCD) is used as a ground fault monitor, use only Type B (adjustable) devices to avoid nuisance tripping.
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