Summary of Contents for Danfoss VLT Brake Resistor MCE 101
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MAKING MODERN LIVING POSSIBLE Design Guide ® Brake Resistor MCE 101 ® Frequency Converters • FC 51 • FC 102 • FC 202 • FC 301 ® FC 302 • FC 360 • FCD 302 • VLT 2800 www.danfoss.com/drives...
• Programming. the 50-1000 V AC and the 75-1500 V DC voltage ranges. Danfoss CE-labels in accordance with the directive and As an alternative to using a brake resistor, other braking issues a declaration of conformity upon request. methods can be applied depending on the braking profile 1.3 Safety Precautions...
When the speed reference of a frequency converter is reduced, the motor acts as a generator and the frequency converter brakes. When a motor acts as a generator, it The Danfoss brake resistor range consists of 2 groups: supplies energy to the frequency converter which is •...
3.3 Protective Functions 3.3.1 Overtemperature Protection Illustration 3.18 Temperature Switch in Brake Resistor The Danfoss brake resistor MCE 101 is equipped with a galvanic isolated temperature switch (PELV) that is closed NOTICE under normal operating conditions and open if the brake resistor is overheated.
System Integration Design Guide 4.1.4 Calculation of the Brake Resistor Peak Danfoss offers brake resistors with a duty-cycle of max. Power 10% and 40%. If a 10% duty-cycle is applied, the brake resistors are able to absorb P for 10% of the period peak time.
Danfoss selection tables selection tables Illustration 8.1 Brake Resistor Selection Flow Chart 1) When contacting Danfoss, provide the following data: • Nominal power 100% • Maximum power during brake cycle • Braking time/duty cycle •...
Voltage class Rated motor size for frequency converter Minimum permissible brake resistor - by frequency converter Recommended brake resistor resistance of Danfoss brake resistors Thermo relay Brake current setting of external thermo relay Danfoss part number Danfoss brake resistor order numbers Recommended minimum value based upon PVC insulated copper cable.
8.3.1 Abbreviations used in the Brake Resistor Tables Mains Voltage class Rated motor size for frequency converter Minimum permissible brake resistor - by frequency converter Recommended brake resistor resistance of Danfoss brake resistors Duty cycle x100/Pm br,cont. Danfoss part number Danfoss brake resistor order numbers Brake resistor average rated power br,cont.
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