Trane TR200 Series Programming Manual page 67

Parameter Description
Trip at Motor Speed Low Limit
In par.4-11 Motor Speed Low Limit [RPM]
mum speed for the motor in order to ensure proper oil distribution.
In some cases e.g. if operating in current limit because of a defect in the compressor, the output motor speed
can be suppressed below Motor Speed Low Limit. To prevent damage to the compressor it is possible to set
trip limit. If the motor speed drops below this limit, the frequency converter will trip and issue an alarm (A49).
Reset will take place according to the selected function in par.14-20
If the trip must take place at a rather exact speed (RPM), it is recommended to set par.0-02
for RPM and use slip compensation, which can be set in par.1-62
Note
To achieve the highest accuracy with the slip compensation, an Automatic Motor Adaptation (AMA) should be
performed. To be enabled in par.1-29
Note
Trip will not be active when using a normal stop- or coast command.
1-86 Trip Speed Low [RPM]
Range:
0 RPM* [0 - par. 4-13 RPM]
NOTE: This parameter is only available if par.0-02
1-87 Trip Speed Low [Hz]
Range:
0.0 Hz* [0.0 - par. 4-14 Hz]
NOTE: This parameter is only available if par.0-02
1-9* Motor Temperature
Parameters for setting the temperature protection features for the motor.
1-90 Motor Thermal Protection
Option:
[0] No protection
66
and par.4-12 Motor Speed Low Limit [Hz]
Automatic Motor Adaptation
Function:
If the Trip Speed is set to 0, the function is not active.
If the speed at any time after the start (or during a stop) falls below the
value in the parameter, the drive will trip with an alarm [A49] Speed
Limit. Function at stop.
Motor Speed Unit
Function:
If the Trip Speed is set to 0, the function is not active.
If the speed at any time after the start (or during a stop) falls below the
value in the parameter, the drive will trip with an alarm [A49] Speed
Limit. Function at stop.
Motor Speed Unit
Function:
The frequency converter determines the motor temperature for motor
protection in two different ways:
• Via a thermistor sensor connected to one of the analog or digital
inputs (par.1-93
• Via calculation (ETR = Electronic Thermal Relay) of the thermal
load, based on the actual load and time. The calculated ther-
mal load is compared with the rated motor current I M,N and
the rated motor frequency f M,N . The calculations estimate the
need for a lower load at lower speed due to less cooling from
the fan incorporated in the motor.
If the motor is continuously overloaded and no warning or trip of fre-
quency converter is wanted.
it is possible to set a mini-
Reset Mode.
Motor Speed Unit
Slip Compensation.
(AMA).
is set to [RPM].
is set to [Hz].
Thermistor Source).
TR200 Programming Guide