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Motor
10.4.1.2 KTY Sensor
The frequency converter handles 3 types of KTY sensors:
•
KTY Sensor 1: 1 kΩ at 100 °C (212 °F). Philips KTY
84-1 is an example.
•
KTY Sensor 2: 1 kΩ at 25 °C (77 °F). Philips KTY
83-1 is an example.
•
KTY Sensor 3: 1 kΩ at 25 °C (77 °F). Philips
KTY-10 is an example.
4500
4000
3500
3000
2500
2000
1500
1000
500
0
-25
0
25
50
Temperature [°C]
KTY type 1
Illustration 10.5 KTY Type Selection
2
44
MK102
1
43
1
Klixon switch
2
BRF connector
Illustration 10.6 Klixon Switch Connection
MG37N102
Design Guide
75
100
125
150
KTY type 2
KTY type 3
2
2
1
1
1
2
DC+ DC-
3
–
Danfoss A/S © 6/2016 All rights reserved.
NOTICE
PELV COMPLIANCE
If short circuits occur between motor windings and the
sensor, PELV compliance is not achieved when the motor
temperature is monitored via a thermistor or KTY sensor.
Ensure that the sensor is isolated better.
10.4.1.3 Brake Resistor Thermal Switch
Installation
Each drive module has a brake fault jumper connector on
the top plate, which is used to connect the Klixon thermal
switch on the brake resistors. See Illustration 10.6. This
connector has a pre-installed jumper. The brake fault
jumper must always be in place to ensure proper
operation of the drive module. Without this jumper
connection, the drive module does not allow the inverter
to operate, and a brake IGBT fault is shown.
The thermal switch is a normally closed type. If the brake
resistor temperature exceeds recommended values, the
thermal switch opens. Use 1 mm
double insulated wire for the connection.
NOTICE
Danfoss is not responsible for the failure of any Klixon
thermal switch.
8 7 6 11 10 9
1
2
Ferrite core
–
2
(18 AWG), reinforced and
1
2
3
107
10
10
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