Filter
Top Products
Legend
CCW — Counter Clockwise
CFR — Current Feedback Resistor
STR — Shunt Trip Relay
Overload relay trips
when starting.
Incorrect heater coils (melting allow). Check heater coil rating.
Loose heater coil. Tighten heater coil.
Long starting time (high inertia applications
may require slow trip overload and oversize
starter).
Motor and starter thermal capabilities
must be evaluated before extending over-
load trip times.
Mechanical problems. Check machinery for binding or exces-
sive loading.
Single phasing. See ‘‘Starter or motor is noisy or vibrates
when starting’’ symptom in troubleshoot-
ing table.
Excessive starting time (current limit may
be set too low).
Increase current limit setting clockwise.
Overload relay trips
when running.
Incorrect heater coils (melting alloy). Check heater coil rating.
Mechanical problems. Check machinery for binding or exces-
sive loading.
Single phasing. See ‘‘Starter or motor is noisy or vibrates
when starting’’ problem in troubleshooting
table.
Heatsink overtempera-
ture switch opens.
Excessive current. Check motor current draw.
Defective heatsink, fan. Check that all fans are rotating freely.
Erratic operation. Loose connections. Check all connections.
Table 13 — Cutler-Hammer
Solid-State Starter Troubleshooting Guide (Continued)
Problem Probable Cause Area of Correction