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2.6.4
Enhanced protective functions
The enhanced protective functions complement the functionality of the ETU600
electronic trip unit and can be added in sub-packages or as a complete function
package:
• Phase unbalance current, phase unbalance voltage
• Total harmonic distortion for current and voltage
• Undervoltage, overvoltage
• Forward power, reverse power
• Underfrequency, overfrequency
• Reverse-phase sequence protection
2.6.5
Second set of protection parameters
A second parameter set (parameter set B) enables switching between two
characteristics of the ETU600 electronic trip unit.
2.6.6
Metering values
The integrated metering function of the circuit breaker can be extended by means of
function packages. This provides additional metering values. A metering function type
PMF-I (Energy Efficiency) can be extended to type PMF-II (Basic Power Monitoring). It is
also possible to upgrade to type PMF-III (Advanced Power Monitoring).
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
Description
2.6 Function packages
129
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Troubleshooting
