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Thermal Level 1
This setting parameter is intended to be used for alarm only. When Thermal Capacity exceeds the set value,
and if enabled, the MPS3000 sets an alarm signal. A host computer can use this signal to read "Time to Trip"
and determine the time left until the MPS3000 will trip.
Stall Time Factor
It is possible to connect a Speed Switch to improve the thermal protection of a motor. When the speed switch
detects that the motor is not turning, Curve Multiplier value is automatically decreased, according to "Stall Time
Factor" setting.
Stall Time Factor is the ratio between motor heating thermal time constant when Speed Switch is closed
(indicating slow speed) to the time constant in normal starting process. The Speed Switch setting is one of the
possible settings for any one of the discrete inputs A, B, C or D. For the MPS3000-C there is also an additional
special input for the speed switch.
Range: 20 - 100 %. Increments of: 1%
The last value of the Thermal Capacity is stored in the non Volatile memory during auxiliary supply failure or
disconnection. On restoration of supply, the former value will be re-established.
Note: "Thermal Level 2" overrides "Current Inhibit" settings.
Next Figure and Table specify overload trip time delay for Curve Multiplier = 6..
CURVE MULTIPLIER = 6
1.0
10.0
100.0
1000.0
10000.0
100000.0
1.0 10.0 100.0
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