WEG SSW-08 Manual Del Usuario página 50

Protection
Description and Activation Description
Fault Display
Internal When there is a fault with the internal
By-pass relay By-pass relay contacts at full voltage.
contact Open
E71
(LED Fault)
Flashes 3 times
(LED Ready)
Off
Overcurrent Activates before the closing of the
before the By-pass if the current is greater than:
By-pass 37.5 A for the SSW models up to 30 A;
200 A for the SSW models from 45
E72 to 85 A;
260 A for the SSW model of 130 A;
(LED Fault) 400 A for the SSW models from 171
Flashes 4 times and 200 A.
(LED Ready) 824 A for the models from 255 A to
Off 412 A.
Frequency out of When the limit is higher or lower than
tolerance the limits of 45 to 66 Hz.
E75
(LED Fault)
Flashes once
(LED Ready)
Off
Closed When the SSW-08 does not detect
By-pass contact voltage difference between the input
or shorted SCR's and output at the moment the motor
is switched off.
E77
(Fault LED)
flashes 6 times
(Ready LED)
Off
NOTE!
In the case of E04 (over temperature), it is necessary to wait a little before resetting,
in order to cool down.
In the case of E05 (motor overload), it is necessary to wait a little before resetting, in
order to cool down.
Solution and Troubleshooting
Table 6.1: Faults and possible causes (cont.)
Loose contact in the starting cables of
the Internal By-pass relays.
Defective By-pass relay contacts due to
an overload
Incorrect electronic supply voltage, only
for SSW-08 models 255-412 A
The time programmed for the
acceleration ramp is shorter than the
actual acceleration time.
Nominal motor current higher than the
current that can be supported by the
Soft-Starter.
Motor shaft is locked, rotor blocked.
The line frequency is out of range.
When the Soft-Starter + motor are
being supplied by a generator that is
not supporting the full load or the start
of the motor.
Bad contact in the relay cables.
By-pass contacts are welded.
Short-circuit Thyristor.
Input and output external short-circuit.
Disconnected motor.
Probable Causes Reset
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
6
Reset key.
Auto-reset.
DIx.
Power-on.
Manual
reset
Reset key.
DIx.
SSW-08 | 45