Protections And Displays - WEG SSW 05 Plus Guia Del Usuario

14. PROTECTIONS AND DISPLAYS:

Protection/Display
Description
(overcurrent)
Overcurrent*
Phase Loss*
(Phase Loss)
Incorrect Phase LED
Sequence* (Phase Seq)
Locked Rotor* LED (Stall)
Motor overload
protection*
(Overload)
Overcurrent of the
SSW-05 Plus
(Internal Fault)
By-pass relay
Overcurrent before
Internal Fault)
By-pass
Thyristor
overload (Internal Fault)
Frequency out
of Tolerance (Internal Fault)
Internal By-pass
relay contact is
(Internal Fault)
open
Undervoltage in the
Control Supply
(Internal Fault)
Ready to operate
(Ready)
In Operation
* These protections may be enabled/disabled through the respective dip-switches.
Display
Monitoring is activated only when the SSW-05 Plus is in rated duty
LED
(100% voltage). It trips, when the motor current exceeds 3 times the
value set with the trimpot (Motor Current) during a time longer than 1
second.
LED
It trips after 1s elapses with phase loss, both at the input and at the
output (Motor).
It trips when the current flowing through the SSW-05 is lower than
30% of the current set with trimpot (Motor Current).
The error trips when in incorrect phase sequence.
This protection trips during the transition between the end
of the acceleration ramp time and the contact closure of the internal
by-pass relays of the SSW-05 Plus, when the current flowing through
the SSW-05 Plus is higher than or equal to 2 times the current set
with trimpot (Motor Current).
This protection monitors constantly the motor current and compa-
LED
res it with the value set by the trimpot (Motor Current).
See Item 15.
This protection monitors only when SSW-05 Plus is operating at full
LED
voltage (100%). It trips when the current becomes higher than
times the rated current of the SSW-05 Plus and is present for more
than 1 second. The internal fault LED flashes 5 times intermittently.
This protection trips during the transition between the end of the
acceleration ramp time and the contact making of the internal by-
LED
pass relays of the SSW-05 Plus, when the current flowing through
the SSW-05 Plus is higher or equal to 2 times the rated current of the
SSW-05 Plus. The internal fault LED flashes 4 times intermittently.
This protection monitors the current that flows through the SSW-05
Plus during the acceleration and deceleration ramp time, and com-
LED
pares it with the rated current of the SSW-05 Plus. Fig. 15.2 shows
the trip time curves when thyristors are overloaded. The internal fault
LED flashes 6 times intermittently.
This protection trips when the line frequency is out of range (+/-
LED
10%), when compared with the rated frequency (50 Hz or 60Hz). The
internal fault LED flashes 1 time intermittently.
This protection monitors, if the contact of the internal by-pass relay
LED
of the SSW-05 Plus is closed ( it operates only when the SSW-05
Plus is operated at full voltage (100%). The internal fault LED fla-
shes 3 times intermittently.
This protection monitors the control supply voltage of the electronics
LED
(A1 and A2) constantly and trip always when Vac voltage become
lower than 80% of the rated voltage. The internal fault LED flashes 2
times intermittently.
- ON: SSW-05 Plus has been powered, and is waiting for the enable
LED
command, or with full voltage at output. - Flashing: SSW-05 Plus in
acceleration/deceleration ramp time.
LED
It is On only when SSW-05 Plus is operating (motor is operating with
(Run)
full voltage).
English-11
Activation
2