3UG4622-1AW30 Datasheet, PDF (11/114 Pages) List of Unclassifed Manufacturers – Monitoring and Control Devices

SIMOCODE 3UF Motor Management and Control Devices
■ Function
Multifunctional, solid-state full motor protection
Current-dependent electronic overload protection with
adjustable tripping characteristics (Classes 5, 10, 15, 20, 25, 30,
35 and 40)
• SIMOCODE pro protects three-phase or AC motors according
to IEC 60947-4-1 requirements. The trip class can be adjusted
in eight steps from Class 5 to Class 40. In this way, the break
time can be adapted very accurately to the load torque which
allows the motor to be utilized more effectively. In addition, the
time until the overload tripping operation is performed is
calculated and can be made available to the I&C system. After
an overload tripping operation, the remaining cooling time can
be displayed (characteristic curves for 2-pole and 3-pole
loading in SIMOCODE pro System Manual).
Phase failure/unbalance protection
• The level of the phase unbalance can be monitored and trans-
mitted to the I&C system. If a specified limit value is violated,
a defined and delayable response can be initiated. If the
phase unbalance is larger than 50 %, the tripping time is also
automatically reduced according to the overload characteris-
tic since the heat generation of the motors increases in unbal-
anced conditions.
Stall protection
• If the motor current rises above an adjustable blocking
threshold (current threshold), a defined and delayable
response can be configured for SIMOCODE pro. In this case,
for example, the motor can be shut down independent of the
overload protection. The blocking protection is only enabled
after the configured class time has elapsed and avoids
unnecessarily high thermal and mechanical loads as well as
wear of the motor.
Thermistor motor protection
• This protection function is based on direct temperature
measurements by means of temperature sensors in the stator
windings or in the enclosure of the motor. These protective
functions should be used, in particular, in motors with high
operating frequencies, heavy-duty starting, intermittent and/or
braking operation, but also in the case of speeds lower than
the rated speed. SIMOCODE pro supports connection and
evaluation of several PTC sensors connected in series on the
basic unit. In addition, the sensor measuring circuit can be
monitored for short-circuits and wire breakages. If the
temperature of the motor increases beyond a defined limit or
if there is a fault in the sensor measuring circuit, a defined
response can be configured.
Ground-fault monitoring (internally) with a current measuring
module or current/voltage measuring module
• SIMOCODE pro acquires and monitors all three phase
currents. With vector addition of the phase currents, the motor
feeder can be monitored for possible fault currents or ground
faults with the help of internal calculations. Internal earth fault
monitoring is only available for motors with three-phase
connections in directly grounded networks or in networks
grounded with low impedance. The response of
SIMOCODE pro when a ground fault is detected can be
parameterized and delayed as required.
Ground-fault monitoring (external) with summation current
transformer¹⁾²⁾
• External ground-fault monitoring is normally implemented for
networks that are grounded with high impedance. Using an
additional summation current transformer (3UL2 20.-.A), even
extremely low ground-fault currents can be measured. The
response of SIMOCODE pro when a ground fault is detected
can be parameterized and delayed as required. Fault current
measurement is performed for each summation current
transformer for the following fault currents: 0.3/0.5/1 A
SIMOCODE pro 3UF7
motor management and control devices
Monitoring of adjustable limit values for the motor current
• Current limit value monitoring is used for process monitoring
independent of overload protection. Violation of a current limit
value below the overload threshold can be an indication for a
dirty filter in a pump or for an increasingly sluggish motor
bearing, for example. Violation of the lower current limit value
can be a first indication of a worn drive belt. SIMOCODE pro
supports two-step monitoring of the motor current for freely
selectable upper and lower current limit values. The response
of SIMOCODE pro can be freely configured and delayed if it
reaches an alarm or tripping threshold.
Voltage monitoring³⁾
• By measuring the voltage directly at the circuit-breaker or at
the fuses in the main circuit, even when the motor is
deactivated, SIMOCODE pro can also obtain information
about the reclosing capability of the feeder and signal it if
required.
• SIMOCODE pro supports two-stage undervoltage monitoring
for freely selectable limit values. The response of
SIMOCODE pro can be freely configured and delayed if it
reaches an alarm or tripping threshold.
Monitoring the active power³⁾
• The active power characteristic of a motor provides an
accurate statement of the actual loading over the complete
range. Excessive loading will cause increased wear in the
motor and can result in early failure. Insufficient active power
can be an indication of, for example, motor idling.
• SIMOCODE pro supports two-step monitoring of the active
power for freely selectable upper and lower current limit
values. The response of SIMOCODE pro can be freely
configured and delayed if it reaches an alarm or tripping
threshold.
Monitoring the power factor³⁾
• Especially in the low-end performance range of a motor, the
power factor varies more than the motor current or active
power. Monitoring of the power factor is therefore particularly
useful for distinguishing between motor idling and fault events
such as a tear in a drive belt or a crack in a drive shaft.
• SIMOCODE pro supports two-stage monitoring of power
factor undershoot for freely selectable limit values. The
response of SIMOCODE pro can be freely configured and
delayed if it reaches an alarm or tripping threshold.
Temperature monitoring¹⁾⁴⁾
• The temperature can be monitored, for example, in the motor
windings or at the bearings through up to three resistance
sensors connected to the temperature module.
• SIMOCODE pro supports two-stage monitoring of overheating
for freely selectable limit values. The response of
SIMOCODE pro can be freely configured and delayed if it
reaches an alarm or tripping threshold. Temperature
monitoring is always performed with reference to the highest
temperature of all sensor measuring circuits used.
1) Using basic unit 2.
2) An additional ground-fault module with a 3UL22 summation current
transformer is required.
3) Using basic unit 2 with current/voltage measuring module.
4) An additional temperature module is required.
Siemens LV 1 T · 2006
7/11