Honeywell VFD CORE Installation Instructions Manual page 37

Applicable
Motors
Braking Brake Unit
HP kW Torque
(kg-m)***
VFDB Unit
60 45 25.1 4045
75 55 30.5 4045
100 75 37.2 4030
125 90 50.8 4045
*
The longest operation time for 10% ED is 10 sec. (on: 10 sec.; off: 90 sec.)
**
See Brake Performance Curve below for the relation between Running Time, ED(%) vs Braking Current.
***
The calculation of the maximum braking torque is based on a 4-pole motor (1800rpm)
****
For the heat dissipation, a resistor of 400W or lower should be fixed to the frame and keep the surface below 250
As for a resistor of 1000W and above, the surface temperature should be kept below 600
resistor's temperature limit, it will be necessary to add heat dissipating system or increase resistor's power
NOTE:
1. Definition for Brake Usage ED%
Explanation: The definition of the brake usage ED (%) is for assurance of enough time for the brake unit and brake resistor
to dissipate away heat generated by braking. When the brake resistor heats up, the resistance would increase with temper-
ature, and brake torque would decrease accordingly. Recommended cycle time is one minute.
For safety concern, install an overload relay (O.L) between the brake unit and the brake resistor together with the magnetic
contactor (MC) prior to the drive to protect the drive from abnormal functions. The purpose of installing the thermal over-
load relay is to protect the brake resistor from damages due to frequent brakes, or caused by brake unit's continuous
conductions resulted from unusual high input voltage. Under such circumstance, turn off the power to prevent damaging the
brake resistor.
R /L1
S/L2
T/L3
THERMAL
OVERLOAD
RELAY OR
TEMPERATURE
SWITCH
1
2
Table 1. 230V & 460V
10% ED
Resistor
Value Spec.
for Each
VFD
1 BR1K2W015
4800W 15Ω
1 BR1K5W013
6000W 13Ω
2 8000W 10.2Ω BR1K0W5P1
2 9600W 7.5Ω BR1K2W015
100%
BRAKE TIME
NFB
MC
R / L1
S/L2
T/ L3
O. L.
VFD
MC
SERIES
SA
SURGE
ABSORBER
WHEN USING THE VFD WITH DC REACTOR, PLEASE REFER TO WIRING DIAGRAM IN THE VFD
USER MANUAL FOR THE WIRING OF TERMINAL +(P) OF BRAKING UNIT.
DO NOT WIRE TERMINAL - (N) TO THE NEUTRAL POINT OF POWER SYSTEM.
*
Braking Resistor Series for
Each Brake Unit
Part #****
Unit Connection
2 parallel,
4
2 series
2 parallel,
4
2 series
4 4 series
2 parallel,
4
2 series
T
ED% T1/T0 X 100
T0
CYCLE TIME
U/ T1
V/ T2
IM
W/ T3
MOTOR
1
+ (P) + (P)
- (N) - (N)
2
VFDB
E. F. RA BRAKING
DCM RC
37
CHAPTER 7: OPTIONAL COMPONENTS
Max. Braking Torque
Total
Min.
Resistor
Braking
Value (Ω)
Current
50 12.7
59 12.7
76 9.5
100 6.3
°
C. If the temperature is over the
M33296
THERMAL
OVERLOAD
RELAY
B1
O. L.
BRAKING
BR
RESISTOR
B2
TEMPERATURE
SWITCH
M33297
**
Max. Total Peak
Braking Power
Current (A) (kW)
60 45.6
60 45.6
80 60.8
120 91.2
° °
C (400 F).
63-4528—04