Fu1-50: Electronic Thermal Selection; Fu1-51: Electronic Thermal Level For 1 Minute; Fu1-52: Electronic Thermal Level For Continuous; Fu1-53: Electronic Thermal Characteristic (Motor Type)N Selection - LG SV-iS5 Instruction Manual

Output Voltage
100%
80%
[When Energy Save Level is set at 20%]
☞ Note: This function is not recommended for a large load
or for an application that need frequent acceleration and
deceleration.
☞ Note: This function does not work when ' Sensorless' is
selected in FU2-40 [Control Mode].
FU1-50: Electronic Thermal (Motor i

FU1-51: Electronic Thermal Level for 1 Minute

FU1-52: Electronic Thermal Level for
Continuous
FU1-53: Electronic Thermal Characteristic
(Motor type) selection
These functions are to protect the motor from
overheating without using additional thermal overload
relay. Inverter calculates the temperature rising of the
motor using several parameters and determines whether
or not the motor is overheated. Inverter will turn off its
output and display a trip message when the electronic
thermal feature is activated.
FU1? ETH select
50 --- No ---
Factory Default:
No
This function activates the ETH parameters by setting
' Yes' .
FU1? ETH 1min
51 180 %
Factory Default:
180 %
This is the reference current when the inverter
determines the motor has overheated. It trips in one
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Output
Frequency
Reference Frequency
(Steady Speed)
t) Selection
2
50 0
0
51 180
180
Chapter 6 - Parameter Description [FU1]
minute when 150% of rated motor current established in
FU2-33 flows for one minute.
☞ Note: The set value is the percentage of FU2-33 [Rated
Motor Current].
FU1? ETH cont
52 120 %
Factory Default:
120 %
This is the current at which the motor can run
continuously. Generally, this value is set to ' 100%' and
which means the rated motor current set in FU2-33. This
value must be set less than FU1-52 [ETH 1min].
☞
Note: The set value is the percentage of FU2-33 [Rated
Motor Current].
Load Current [%]
FU1-51
[ETH 1min]
FU1-52
[ETH cont]
1 minute
[Motor i t Characteristic Curve]
2
FU1? Motor type
53 Self-cool
Factory Default:
Self-cool
To make the ETH function (Motor i
motor cooling method must be selected correctly
according to the motor.
[Self-cool] is a motor that has a cooling fan connected
directly to the shaft of the motor. Cooling effects of a
self-cooled motor decrease when a motor is running at
low speeds. The motor current is derated as the motor
speed decreases.
[Forced-cool] is a motor that uses a separate motor to
power a cooling fan. As the motor speed changes, the
cooling effect does not change.
95
52 120
120
Trip Time
53 0
0
t) work correctly, the
2