Overload Tolerance
Overload Characteristics
Cooling Ability
100
150
110
100120 167 200
55
50
0
Rated Speed=100% Speed
60 sec.
Continuous
A
D
B
(60 Hz)
Speed (%)
Torque (%)
Motor is designed to effectively cool
itself even at low speeds (as lower as 6
Hz).
Continuous operation with 100%
load from 6 Hz to 50/60 Hz.
Setting 3: Vector Motor (constant torque, 1:100)
Use this setting when operating a drive dedicated motor with a torque ratio of 1:100. This motor type is allowed to run
with 100% load from 1% up to 100% speed. Running slower speeds with full load can trigger an overload fault.
Overload Tolerance
Overload Characteristics
Cooling Ability
150
100
90
50
0 1
100120 167 200
A
B
D
Continuous
Speed (%)
(60 Hz)
Rated Speed=100% Speed
Torque (%)
60 sec.
Motor is designed to effectively cool
itself at ultra-low speeds (about 0.6
Hz).
Continuous operation with 100%
load from 0.6 Hz to 50/60 Hz.
Setting 4: PM Derated Torque Motor
This setting is for operating a PM motor. PM motors for derated torque have a self-cooling design, so the overload tolerance
drops as the motor slows. Electronic thermal overload is triggered in accordance with the motor overload characteristics,
providing overheat protection across the entire speed range.
Overload Tolerance
Overload Characteristics
Cooling Ability
150
Continuous
60 sec.
Motor Speed (%)
10
33
100
Output
frequency
120
100
80
50
0
Torque (%)
PM motors for derated torque have the
most effective cooling design when
operating at the max frequency.
Because this motor is designed for
derated torque applications, the load
needs to be limited at low speeds.
Note:
Select a method to protect the motor from overheat by setting L1-01 between 1 and 4 when running a single motor from the drive. An
external thermal relay is not needed.
n
L1-02: Motor Overload Protection Time
Sets the time it takes the drive to detect motor overheat due to overload. This setting rarely requires adjustment, but should
correlate with the motor overload tolerance protection time for performing a hot start.
No.
Name
Setting Range
Default
L1-02
Motor Overload Protection Time
0.1 to 5.0 min
1.0 min
• Defaulted to operate with an allowance of 150% overload operation for one minute.
•
Figure 5.74
shows an example of the electrothermal protection operation time using a general-purpose motor operating
at 60 Hz with L1-02 set to one minute.
5.8 L: Protection Functions
186
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
7/16/2008-13:23
Содержание V1000
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Страница 27: ...1 4 Component Names This Page Intentionally Blank 26 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 37: ...2 2 Mechanical Installation This Page Intentionally Blank 36 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 63: ...3 12 Wiring Checklist This Page Intentionally Blank 62 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 221: ...5 11 U Monitor Parameters This Page Intentionally Blank 220 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 273: ...7 5 Drive Replacement This Page Intentionally Blank 272 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 287: ...8 6 Connecting an Option Card This Page Intentionally Blank 286 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 297: ...A 6 Drive Derating Data This Page Intentionally Blank 296 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
Страница 379: ...C 13 Self Diagnostics This Page Intentionally Blank 378 SIEP C710606 20 OYMC AC Drive V1000 User Manual ...
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