Undervoltage Thresholds

Default value

• Dropout: 85% of the rated voltage.

• Pickup: 90% of the rated voltage.

Range

• Range for falling voltage (dropout) is 70%-95% of the rated voltage.

• Range for return voltage (pickup) is 85%–100% of the rated voltage.

Adjustable

The adjustable step for an undervoltage threshold is 1%.

Differential

• The differential between dropout and pickup is equal to 2% of rated voltage.

On LCD display

• If minimum 2% differential of rated voltage rule is broken during dropout setting, the pickup value will be modified dynamically (pickup = dropout + 2%) to keep the rule.

On Modbus

Modbus register write: The dropout value is always accepted. The pickup value will be modified to a value (pickup = dropout + 2%) when the pickup value does not comply the minimum differential.

Sequence of events

• When a sensor detects a voltage below the dropout set voltage for a period longer than the time delay, it will deem the voltage for out of range.

• When a sensor detects a voltage at or above the pickup point, it will deem the voltage as acceptable.