LS ELECTRIC LSLV-L100 Series, Руководство пользователя

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Detailed operation by function groups
276
Code Keypad display Name Range Unit Default setting
1 (Yes)
PRT_02 ETH 1 Min
Electronic thermal one
minute rating
PRT_03–200 % 150
PRT_03 ETH Cont
Electronic thermal
continuous rating 50–PRT_02
(150% max)
% 100
PAR_19 Rated-Curr Motor rated current 1.0–1000.0 A -
PAR_22 Cooling Mtd Motor cooling fan type
0 (Self-cool)
1 (Forced-cool)
Forced-cool
The electronic thermal level is a ratio (%) to “Motor rated Current” set at PAR_19.
“Electronic thermal one minute rating” (PRT_02) is the magnitude of input
current that is supplied to the motor for one minute until the motor is considered
as overheated.
“Electronic Thermal continuous rating” (PRT_03) is the magnitude of input
current that the motor is not overheated when the current is continuously
supplied to the motor. In general, it is set as the motor’s rated current (100%),
and it must be set to a lower value than the value of Electronic Thermal one
minute rating. The motor continuously operates to the configured value.
“Motor cooling fan type” (PRT_22) is for setting the motor’s cooling fan type for
the electronic thermal function.
•
Self-cool: Select the Self-cool mode when operating the cooling fan attached
to the motor axis. This mode is for universally designed induction motors. In
this case, the cooling capacity greatly decreases when the motor is operated
at low speed. The motor overheats rapidly at lower speed. Therefore,
depending on the motor speed, the electric thermal function operates with
reduced continuous rated current set at "ETH Cont" (PRT_02) as shown in
the graph below.
•
Forced-cool: Select the Forced-cool mode when operating a cooling fan
independently, with a separate power supply. The continuous rated current set
at "ETH Cont" (PRT_03) is applied regardless of the motor speed.