Instruction Leaflet DT3000
Page 36 Effective: Date 07/02 I.B. 17555D
For more information visit: www.cutler-hammer.eaton.com
Supersedes I.B. 17555C dated November 1999
TABLE 6.1 TROUBLESHOOTING GUIDE
Symptom Probable Cause Possible Solution(s) Reference
• Protective Relay’s Control
Power is Deficient or
Absent
• Verify that Control Power is Connected
Between TB1 -5 and B1 -6 and that it is
within Specifications
• Figure 3-1
and
Paragraph 2-
3
Operational LED is
Off
• Protective Relay is
Malfunctioning
• Replace the Protective Relay • Paragraph 6-
3
• Protective Relay’s Control
Power is Deficient or
Absent
• Verify that Control Power is Connected
Between TBI-5 and TBI-6 and it is within
Specifications
• Figure 3-1
and
Paragraph 2-
3
Operational LED is
On but Does not Blink
• Protective Relay is
Malfunctioning
• Replace the Protective Relay • Paragraph 6-
3
Operational LED
Blinks Red
• Internal Problem Detected • Press Reset Pushbutton
• Reprogram Set points
• Replace Protective Relay if Symptom
Persists
• Paragraph 2-
2.1 and 3-2
• Paragraph 3-
3.2
• Paragraph 6-
3
Operational LED is
NOT Definite Red or
Green
• Internal Problem Detected • Press Reset Pushbutton
• Reprogram Set points
• Replace Protective Relay if Symptom
Persists
• Paragraph 2-
2.1 and 3-2
• Paragraph 3-
3.2
• Paragraph 6-
3
• Set points are Invalid • Reprogram Set points • Paragraph 3-
3.2
“PGRM” Appears in
Settings Display
Window
• Check sum did not Match • Replace Protective Relay if “PGRM”
Reappears After Saving Settings
• Paragraph 6-
3
• There was an Error During
Set point Programming
• Make Sure DIP switch S2 is in Correct
Position
• Table 5.1
“ERR” Appears in
Setting
• There was an Error While
in the Test Mode
• More than 0.1 Per Unit of Current Cannot
Flow While in Test Mode
• Paragraph 3-
3.3
“RAM” Appears in
Settings Display
Window
• An Internal RAM Check
Failed
• Remove Power from the Protective Relay
and then Reapply Power - If the Symptom
Persists, Replace the Protective Relay
• Paragraph 6-
3
• Incorrect CT Ratio used in
Equipment
• Verify CT Ratio in Equipment • Paragraph 1-
3 and
Paragraph 3-
3.2
• Incorrect Current Wiring • Verify Connections on CT Wiring • Figure 3-1
• Incorrect System
Frequency Programmed
• Set to Correct Frequency • Paragraph 3-
3.2
Current Readings
Appear Incorrect
• Breaker Contact to trip
unit not functioning
• Insure Proper Contact Type is Connected
to Protective Relay and Functioning
• Figure 3-1
• Incorrect Settings • Check Settings • Paragraph 3-
3.2 and Table
5.1
• Phase Zone Interlocking
not used and Jumper
Missing
• Check for Phase Zone Interlocking Jumper
Between TB1 -13 and TB1 -14
• Figure 3-1
Circuit Breaker Trips
Much Faster than
Expected on Inverse
Time Overcurrent
• Ground Zone Interlocking
not Used and Jumper
Missing
• Check for Ground Zone Interlocking
Jumper Between TB1 -11 and TB1 –12
• Figure 3-1
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