Danfoss VLT Brake Resistor MCE 101 User Manual

8.2 Selection Tables for Recommended Brake Resistors
8.2.1 Abbreviations used in the Brake Resistor Tables
Mains Voltage class
P
m
Rated motor size for frequency converter
R
min
Minimum permissible brake resistor - by frequency converter
R
rec
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
Cable cross-section
Recommended minimum value based upon PVC insulated copper cable. 30 °C ambient temperature with normal
heat dissipation
P
br,cont.
Brake resistor average rated power. The temperature switch enables at approximate 90% of continuous rated
power at brake resistors with IP54, IP21 and IP65 enclosure protection
R
br,nom
The nominal (calculated) resistor value to ensure a brake power on motor shaft of 150/160/110% for 1 minute
8.2.2
VLT
®
Micro Drive FC 51
10% duty cycle, horizontal braking, S2, T2, T4
FC 51 Horizontal braking 10% duty cycle
Frequency converter data
Brake resistor data Installation
R
rec
[Ω]
P
br,cont.
[kW]
Danfoss part number
Cable
cross-
section
[mm
2
]
Thermo
relay
[A]
Mains
type
P
m
[kW]
R
min
[Ω]
R
br,nom
[Ω]
Wire IP54
Screw
terminal
IP21
Screw
terminal
IP65
Bolt
connection
IP20
S2 1.5 60.0 70.9 70 0.200 175u3026 - - - 1.5 1.6
S2 2.2 40.0 47.6 48 0.200 175u3031 - - - 1.5 1.9
T2 1.5 60.0 70.9 70 0.200 175u3026 - - - 1.5 1.6
T2 2.2 40.0 47.6 48 0.200 175u3031 - - - 1.5 1.9
T2 3.7 23.0 27.7 27 0.360 175u3326 175u3477 175u3478 - 1.5 3.5
T4 1.5 234 274.8 270 0.200 175u3007 - - - 1.5 0.8
T4 2.2 157 184.4 200 0.200 175u3008 - - - 1.5 0.9
T4 3 113 133.7 145 0.300 175u3300 - - - 1.5 1.3
T4 4 83.0 98.9 110 0.450 175u3335 175u3450 175u3449 - 1.5 1.9
T4 5.5 60.0 71.2 80 0.570 175u3336 175u3452 175u3451 - 1.5 2.5
T4 7.5 44.0 51.8 56 0.680 175u3337 175u3027 175u3028 - 1.5 3.3
T4 11 29.0 34.8 38 1.130 175u3338 175u3034 175u3035 - 1.5 5.2
T4 15 21.0 25.3 28 1.400 175u3339 175u3039 175u3040 - 1.5 6.7
T4 18.5 17.0 20.4 22 1.700 175u3340 175u3047 175u3048 - 1.5 8.3
T4 22 14.0 17.1 19 2.200 175u3357 175u3049 175u3050 - 1.5 10.1
Table 8.1 S2, T2, T4, Horizontal Braking 10% Duty Cycle
Selection Guide Design Guide
MG90O202 Danfoss A/S © Rev. 05/2014 All rights reserved. 33
8 8

Danfoss VLT Brake Resistor MCE 101 Specifications

General

Brand	Danfoss
Model	VLT Brake Resistor MCE 101
Category	DC Drives
Language	English