Rockwell Automation 193-EC1_2_3_5, 193-ECPM,592-EC1_2_3_5 E3 and E3 Plus Solid-State Overload Relay User Manual - Manual (Page 220)

220 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 12 Troubleshooting
Table 12: Trip/Warn LED Troubleshooting Procedures, Continued
E3 Plus Model EC5 Only
Trip Description Possible Cause Corrective Action
Under Real Power
(kW) 1. Real power has exceeded the programmed under real power
level.
2. Improper parameter settings.
3. Relay is applied to the output of a variable frequency drive.
1. Check power system
2. Verify that current is flowing from the line side (L Terminals) to the
load side (L Terminals or contactor mounting stabs) of the relay.
3. Inspect contactor or circuit breaker for proper operation.
4.
Verify that Parameter 243, UW Trip Level, is set properly for the
application.
5. The E3 Plus model EC5 is not intended to be used on the output of a
variable frequency drive.
6. Check to ensure that Parameters 289 and 290, PT Primary and PT
Secondary , are set properly if applicable.
Over Real Power
(kW) 1. Real power has exceeded the programmed over real power
level.
2. Improper parameter settings.
3. Relay is applied to the output of a variable frequency drive.
1. Check power system
2. Verify that current is flowing from the line side (L Terminals or
contactor mounting stabs) to the load side (T terminals) of the relay.
3. Inspect contactor or circuit breaker for proper operation.
4. Verify that Parameter 247, OW Trip Level, is set properly for the
application.
5. The E3 Plus model EC5 is not intended to be used on the output of a
variable frequency drive.
6. Check to ensure that Parameters 289 and 290, PT Primary and PT
Secondary , are set properly if applicable.
Under Reactive
Power Consumed
(+kVAR) 1. Reactive power has exceeded the programmed under reactive
power consumed level.
2. Improper parameter settings.
3. Relay is applied to the output of a variable frequency drive.
1. Check power system
2. Verify that current is flowing from the line side (L Terminals or
contactor mounting stabs) to the load side (T terminals) of the relay.
3. Inspect contactor or circuit breaker for proper operation.
4. Verify that Parameter 251, UVARC Trip Level, is set properly for the
application.
5. The E3 Plus model EC5 is not intended to be used on the output of a
variable frequency drive.
6. Check to ensure that Parameters 289 and 290, PT Primary and PT
Secondary , are set properly if applicable.
Over Reactive
Power Consumed
(+kVAR) 1. Reactive power has exceeded the programmed over reactive
power consumed level.
2. Improper parameter settings.
3. Relay is applied to the output of a variable frequency drive.
1. Check power system
2. Verify that current is flowing from the line side (L Terminals or
contactor mounting stabs) to the load side (T terminals) of the relay.
3. Inspect contactor or circuit breaker for proper operation.
4. Verify that Parameter 255, OVARC Trip Level, is set properly for the
application.
5. The E3 Plus model EC5 is not intended to be used on the output of a
variable frequency drive.
6. Check to ensure that Parameters 289 and 290, PT Primary and PT
Secondary , are set properly if applicable.
Under Reactive
Power Generated
(-kVAR) 1. Reactive power has exceeded the programmed under
reactive power generated level.
2. Improper parameter settings.
3. Relay is applied to the output of a variable frequency drive.
1. Check power system
2. Verify that current is flowing from the line side (L Terminals or
contactor mounting stabs) to the load side (T terminals) of the relay.
3. Inspect contactor or circuit breaker for proper operation.
4. Verify that Parameter 259, UVARG Trip Level, is set properly for the
application.
5. The E3 Plus model EC5 is not intended to be used on the output of a
variable frequency drive.
6. Check to ensure that Parameters 289 and 290, PT Primary and PT
Secondary , are set properly if applicable.