Siemens 440 Motor temperature sensor, Alarm threshold, motor overtemperature

6 Commissioning Issue 10/06

P0335 = ...

P0601 = ...

A high thermal motor load and when the line supply is frequently switched- out/switched-in requires, for closed-loop vector control

−that a KTY84 sensor is used, or

−an external 24V power supply voltage is connected

Motor cooling (Selects motor cooling system used) 0

0Self-cooled: Using shaft mounted fan attached to motor

1Force-cooled: Using separately powered cooling fan

2Self-cooled and internal fan

3Force-cooled and internal fan

Motor temperature sensor 0

Selects the motor temperature sensor.

0No sensor

1PTC thermistor (PTC)

2KTY84

5 V

ADC

PTC

KTY

Fault

F0015

T1 = 4 s

Signal

loss

detection

Equivalent circuit data

Power dissipation

PV,mot

	P0601 = 2	&
0	No sensor
	PTC
1
	KTY
2
	ϑ
P0601		V
	Thermal	r0631
	motor	r0632
	model
		r0633

1

0

r0035

1

0

P0604

r0052

Bit13

Motor ≥ 1 temp. reaction

P0610

P0604 = ...

P0610 = ...

P0640 = ...

Alarm threshold, motor overtemperature 130.0 °C

Defines the alarm threshold for the motor overtemperature protection. This threshold, where either a shutdown (trip) or Imax reduction is initiated (P0610) always lies 10 % above the alarm threshold.

ϑtrip = 1.1⋅ ϑwarn = 1.1⋅ P0604	ϑwarn : Warning threshold (P0604)
	ϑtrip : Trip threshold (max. permissible temperature)

The alarm threshold should be at least 40 °C greater than the ambient temperature P0625.

P0604 ≥ P0625 + 40 °C

Inverter temperature reaction		2
Defines reaction when motor temperature reaches warning threshold.
0	No reaction, warning only
1	Warning and Imax reduction (results in a lower output frequency)
2	Warning and trip (F0011)
Motor overload factor [%]		150.0 %

Defines motor overload current limit in [%] relative to p0305 (rated motor current). Limited to maximum inverter current or to 400 % of rated motor current (p0305), whichever is the lower.

46	MICROMASTER 440
	Operating Instructions (Compact)