Schweitzer Engineering Laboratories SEL-701 - Troubleshooting Procedure

701 Motor Protection Relay Date Code 20010719
Maintenance & Troubleshooting
Troubleshooting Procedure
10.6
Troubleshooting Procedure
Relay Enabled Front-Panel LED Dark
Table 10.3 Re lay E nabled Fron t-Panel LED Da rk
Cannot See Characters on Relay Front-Panel Display Screen
Table 10.4 Ca nnot See Chara cters on Relay Fr ont-Panel Displ ay Screen
Relay Does Not Accurately Measure Voltages or Currents
Table 10.5 Re lay D oes Not Acc urately Measu re Voltages or Currents
Table 10.3 Relay Enabled Front-Panel LED Dark
Possible Cause Solution
Input power not present or fuse
is blown.
Verify input power and fuse continuity.
Self-test failure. Check to see if the ALARM b-contact is closed. Use
the front-panel Status of Relay function to view self-
test results.
Table 10.4 Cannot See Characters on Relay Front-Panel Display Screen
Possible Cause Solution
Relay front-panel has timed-out.
Press the
{ESC}
pushbutton to activate
display.
Relay is deenergized. Verify input power and fuse continuity.
Table 10.5 Relay Does Not Accurately Measure Voltages or Currents
Possible Cause Solution
Wiring error. Verify input wiring.
Incorrect CTR, ITAP, CTRN, INTAP, or
PTR setting.
Verify signal source ratios, connections,
and associated settings.
Voltage neutral terminal (D09) not
properly grounded.
Verify wiring and connections.