Rockwell Automation 193-EC4 EC4 Current Monitoring Relay User Manual - Manual (Page 45)

46 Rockwell Automation Publication 193-UM011A-EN-P - September 2010
Chapter 3 Protective Trip and Warning Functions
• The outputs will be placed in their Protection Fault State (if so
programmed).
Preventive Maintenance
Diagnostics The purpose of this section is to provide detailed information regarding the
Preventive Maintenance Diagnostic functions of the EC4 Current Monitoring
Relays. In this section programming and monitoring parameters as they relate to
these functions will be discussed. For complete descriptions of the programming
parameters, refer to Programmable Parameters on page 5-58.
Monitoring
Parameter 95, Elapsed Time, logs the hours of motor operation — the time
period that the EC4 Current Monitoring Relay is sensing motor current present
(must be greater than 30% of the minimum Full Load Current (FLA) setting).
Parameter 96, Starts Counter, logs the number of starts, defined as the number of
times motor current transitions from zero to a reported non-zero value (motor
current must be greater than 30% of the minimum Full Load Current (FLA)
setting).
Preventive Maintenance Flags
The EC4 Current Monitoring Relay offers preventive maintenance flags in the Warning
Status parameter based on the number of start cycles or the number of operating hours
(motor current must be greater than 30% of the minimum Full Load Current (FLA)
setting). These can be used to send the user a warning message that the number of starts
or number of operating hours has been reached and that it is time to perform preventive
maintenance. The preventive maintenance warning function can be set by:
PM - # Starts
and/or PM – Oper. Hours.
The EC4 Current Monitoring Relay will give a PM - # Starts warning indication
when:
• PM - # Starts warning is enabled
IMPORTANT The Protection Fault state of OUT A and OUT B is defined by Parameter
65 (OUTA Pr FltState), Parameter 66 (OUTA Pr FltValue), Parameter 71
(OUTB Pr FltState) and Parameter 72 (OUTB Pr FltValue).
IMPORTANT The EC4 Current Monitoring Relay will report 0 A or 0% FLA if the
current is below 30% of the minimum FLA setting.
IMPORTANT The EC4 Current Monitoring Relay will report 0 A or 0% FLA if the current
is below 30% of the minimum FLA setting.