Protections And Displays - WEG SSW-05 Manual Del Usuario

Installation and Operation Manual - SSW-05 Plus

14. PROTECTIONS AND DISPLAYS:

Protection/Display Display
Description
(overcurrent)
Overcurrent*
Phase Loss*
(Phase Loss)
Incorrect Phase
Sequence* (Phase Seq)
Locked Rotor* LED (Stall)
Motor overload
protection* (Overload)
Overcurrent of the
SSW-05 Plus (Internal Fault)
By-pass relay Flashes
5 times
Overcurrent before Internal Fault)
By-pass Flashes
4 times
Thyristor
overload (Internal Fault)
Flashes
6 times
Frequency out
of Tolerance (Internal Fault)
Flash Once
Internal By-pass
relay contact is (Internal Fault)
open Flashes
3 times
Undercurrent (Internal Fault)
Flashes
8 times
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.
- At start: it acts when there is no voltage at the power supply terminals
LED
(R/1L1, S/3L2 e T/5L3), or when motor is disconnected.
- In duty (full voltage – 100%). It acts after 1s after phase loss has been
detected both at the motor input and output. It acts when the current
that flows through the SSW-05 is lower than x% of current set at trimpot
Motor Current.
where:
x%= 20% for trimpot Motor Current or P105 between 50% - 100%
x%= 30% for trimpot Motor Current or P105 between 30% - 50%
It also acts when a current unbalance larger than 30% is detected
between the phases.
LED
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 compares it
LED
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%). Is activated when the current is higher than the adjusted
value for more than 1 second. The activation level is 60A for the following
SSW-05 models: 3A to 30A. For the 45A to 85A models the activation
level is 200A. The internal fault LED flashes 5 times intermittently.
This protection trips during the transition between the end of the
LED
acceleration ramp time and the contact making of the internal bypass
relays of the SSW-05 Plus, when the current flowing through the SSW-
05 Plus is higher or equal the rated level. The activation level is 37.5A for
the following SSW-05 models: 3A to 30A. For the 45A to 85A models
the activation level is 200A. The internal fault LED flashes 4 times
intermittently.
This protection monitors the current that flows through the SSW-05 Plus
LED
during the acceleration and deceleration ramp time, and compares 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 (+/- 10%),
LED
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 of
LED
the SSW-05 Plus is closed ( it operates only when the SSW-05 Plus is
operated at full voltage (100%). The internal fault LED flashes 3 times
intermittently.
Monitoring occurs only when the SSW-05 Plus reaches steady-state (100%
LED
of voltage). It acts when the current that flows throught the SSW-05 is
lower than P610% of current set at trimpot motor current, for a time period
longer than the value set in P611.
English-12
Activation