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Initial Release
TABLE 5.1 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
•
Paragraph 2-3
Operational LED is
Off
•
Protective Relay is
Malfunctioning
•
Replace the Protective Relay
•
Paragraph 5-3
•
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
•
Paragraph 2-2
Operational LED is
On but Does not Blink
•
Protective Relay is
Malfunctioning
•
Replace the Protective Relay
•
Paragraph 5-3
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
•
Paragraph 3-3.2
•
Paragraph 5-3
•
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 5-3
“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 3-4
“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 5-3
•
Incorrect CT Ratio used in
Equipment
•
Verify CT Ratio in Equipment
•
Paragraph 1-3
•
Incorrect Current Wiring
•
Verify Connections on CT Wiring
•
Figure 1-3
Current Readings
Appear Incorrect
•
Incorrect System
Frequency Programmed
•
Set to Correct Frequency
•
Paragraph 2-1.4
•
Improper Wiring from
Protective Relay
•
Check Trip Relay Wiring
•
Check that Trip Contact on Protective
Relay makes
•
Figure 4-3
Protective Relay
Indicates a Trip, but
Circuit Breaker
Doesn’t Open
•
Unit in Test Mode with “No
Trip Test Selected”
•
Select Trip Test while in the Test Mode
•
Check Wiring from Protective Relay to
Circuit Breaker Trip Coil
•
Check that Circuit Breaker has Source of
Tripping Power
•
Paragraph 3-4
•
Wiring Plan
Drawing
•
Wiring Plan
Drawing
Manual Reset
Function not
Operational
•
Damaged Reset
Pushbutton
•
Replace Protective Relay
•
Paragraph 5-3
Caution: When the MD-3000 Protective Relay is Powered, it Supplies Voltage to the “b” Contacts
