Danfoss VLT 2800 Design Manual page 23

Introduction to VLT 2800
Illustration 1.12 Frequency Converter with Brake Resistor and
Thermal Switch
Some of the Danfoss brake resistors contain a thermal
switch (see chapter 1.11.13 Brake Resistors). This switch is
NC (normally closed) and can be used e.g. coasting stop
reverse between terminal 12 and 27. The frequency
converter coasts, if the thermal switch is opened.
CAUTION
The thermal switch is not a protective device. To protect
people and equipments from the risk of fire and
overheating, use a thermal switch as shown in
Illustration 1.12.
MG27E402
Design Guide
Danfoss A/S © Rev. May/2014 All rights reserved.
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