Kendrion INTORQ BFK470 Quick guide

INTORQ BFK470
Spring-applied brake with electromagnetic release
Translation of the Original Operating Instructions
www.intorq.com

Document history
Material number Version Description
33001439 1.0 01/2012 TD09 First edition
33001439 1.1 03/2012 TD09 Supplemented the technical data
33001439 1.2 10/2012 TD09
Added to the "Brake assembly" chapter
Updated the "Abbreviations used" table
Supplemented the characteristics, rated data and switching times
33001439 2.0 05/2013 TD09
Degree of protection changed
Note with regard to the end shield characteristics included
Shaft characteristic defined, "Mechanical installation" chapter
"Checking the brake" chapter (maintenance and repair) supple-
mented
33001439 3.0 05/2013 TD09 Text with regard to the disengagement time updated
33001439 3.1 03/2014 SC Restructured FM; note concerning brake sealing
33001439 4.0 01/2015 SC Harmonized connection diagrams
33001439 5.0 07/2016 SC Additional sizes: 06, 08, 10, 12
33001439 6.0 03/2017 SC Corrosion protection class, change in table
33001439 7.0 03/2020 SC
Migration to ST4
Revision of the chapter "Application range of the INTORQ spring-
applied brake"
33001439 8.0 10/2020 SC Update of name plate and packaging sticker
Legal regulations
Liability
¾
The information, data and notes in these Operating Instructions are up to date at the time of printing.
Claims referring to drive systems which have already been supplied cannot be derived from this infor-
mation, illustrations and descriptions.
¾
We do not accept any liability for damage and operating interference caused by:
– inappropriate use
– unauthorized modifications to the product
– improper work on or with the drive system
– operating errors
– disregarding the documentation
INTORQ | BA 14.0199 | 10/2020 2

Warranty
Notice
The warranty conditions can be found in the terms of sale and delivery from INTORQ
GmbH & Co. KG.
¾
Warranty claims must be made to INTORQ immediately after the defects or faults are detected.
¾
The warranty is void in all cases when liability claims cannot be made.
Product key
Product group: Brakes
Product family: Spring-applied brake
Type: 470
Size: 06, 08, 10, 12, 14, 16, 18
INTORQ B FK
Not coded: Connection voltage, hub bore hole, options
Checking the delivery
After receipt of the delivery, check immediately whether the items delivered match the accompanying pa-
pers.
INTORQ does not accept any liability for deficiencies claimed subsequently.
¾
Claim visible transport damage immediately to the deliverer.
¾
Claim visible deficiencies or incomplete deliveries immediately to INTORQ GmbH & Co. KG.
NOTICE
Labeling of drive systems and individual components
¾
Drive systems and components are unambiguously designated by the labeling on their
name plates.
INTORQ | BA 14.0199 | 10/2020 3

Inhalt
1 General information................................................................................................................................................... 6
1.1 Using these Operating Instructions...................................................................................................................... 6
1.2 Conventions in use............................................................................................................................................... 6
1.3 Safety instructions and notices ............................................................................................................................ 6
1.4 Terminology used................................................................................................................................................. 7
1.5 Abbreviations used............................................................................................................................................... 8
2 Safety instructions................................................................................................................................................... 10
2.1 General safety instructions................................................................................................................................. 10
2.2 Disposal ............................................................................................................................................................. 10
3 Product description ................................................................................................................................................. 11
3.1 Proper and intended usage................................................................................................................................ 11
3.1.1 Standard applications............................................................................................................................ 11
3.2 Layout ................................................................................................................................................................ 11
3.3 Function ............................................................................................................................................................. 12
3.4 Braking and release ........................................................................................................................................... 12
3.5 Project planning notes........................................................................................................................................ 12
3.6 Optional configuration ........................................................................................................................................ 12
3.6.1 Optional CCV......................................................................................................................................... 12
3.6.2 Hand-release (optional)......................................................................................................................... 12
4 Technical specifications.......................................................................................................................................... 13
4.1 Possible applications of the INTORQ spring-applied brake ............................................................................... 13
4.2 Rated data.......................................................................................................................................................... 13
4.3 Switching times .................................................................................................................................................. 20
4.4 Friction work / operating frequency.................................................................................................................... 22
4.5 Electromagnetic compatibility............................................................................................................................. 22
4.6 Emissions........................................................................................................................................................... 23
4.7 Labels on product............................................................................................................................................... 23
5 Mechanical installation............................................................................................................................................ 25
5.1 Design of end shield and shaft........................................................................................................................... 25
5.2 Tools .................................................................................................................................................................. 26
5.3 Preparing the installation.................................................................................................................................... 26
5.4 Installing the hub onto the shaft ......................................................................................................................... 27
5.5 Mounting the brake ............................................................................................................................................ 28
INTORQ | BA 14.0199 | 10/2020 4

6 Electrical installation ............................................................................................................................................... 32
6.1 Electrical connection .......................................................................................................................................... 32
6.1.1 AC switching at the motor – extremely delayed engagement ............................................................... 33
6.1.2 DC switching at the motor – fast engagement....................................................................................... 34
6.1.3 AC switching at mains – delayed engagement...................................................................................... 35
6.1.4 DC switching at mains – fast engagement ............................................................................................ 36
6.2 Technical data for inductive proximity sensors .................................................................................................. 37
6.3 Minimum bending radius for the brake connection cable................................................................................... 38
6.4 Bridge/half-wave rectifier (optional).................................................................................................................... 38
6.4.1 Assignment: Bridge/half-wave rectifier – brake size.............................................................................. 38
6.4.2 Technical specifications......................................................................................................................... 39
6.4.3 Reduced switch-off times ...................................................................................................................... 40
6.4.4 Permissible current load at ambient temperature.................................................................................. 40
7 Commissioning and operation ............................................................................................................................... 41
7.1 Possible applications of the INTORQ spring-applied brake ............................................................................... 41
7.2 Function checks before initial commissioning .................................................................................................... 42
7.2.1 Function check of the brake .................................................................................................................. 42
7.2.2 Release / voltage control....................................................................................................................... 42
7.2.3 Checking a brake with proximity switch................................................................................................. 43
7.2.4 Testing the hand-release functionality................................................................................................... 44
7.3 Commissioning................................................................................................................................................... 44
7.4 Operation ........................................................................................................................................................... 45
8 Maintenance and repair........................................................................................................................................... 46
8.1 Wear of spring-applied brakes ........................................................................................................................... 46
8.2 Inspections......................................................................................................................................................... 47
8.2.1 Maintenance intervals............................................................................................................................ 47
8.3 Maintenance....................................................................................................................................................... 47
8.3.1 Checking the components..................................................................................................................... 48
8.3.2 Checking the air gap.............................................................................................................................. 48
8.3.3 Release / voltage................................................................................................................................... 49
8.3.4 Brake replacement ................................................................................................................................ 49
8.4 Spare parts list ................................................................................................................................................... 50
9 Troubleshooting and fault elimination................................................................................................................... 51
INTORQ | BA 14.0199 | 10/2020 5

General information
INTORQ | BA 14.0199 | 10/2020 6
1 General information
1.1 Using these Operating Instructions
¾
These Operating Instructions will help you to work safely with the spring-applied brake with electro-
magnetic release. They contain safety instructions that must be followed.
¾
All persons working on or with electromagnetically released spring-applied brakes must have the Oper-
ating Instructions available and observe the information and notes relevant for them.
¾
The Operating Instructions must always be in a complete and perfectly readable condition.
1.2 Conventions in use
This document uses the following styles to distinguish between different types of information:
Spelling of numbers Decimal separator Point The decimal point is always used. For ex-
ample: 1234.56
Page reference Underscore, orange _____
Reference to another page with additional
information
For example: Using these Operating In-
structions,Page6
Symbols
Wildcard □
Wildcard (placeholder) for options or selec-
tion details
For example: BFK470-□□ = BFK470-10
Notice Important notice about ensuring smooth op-
erations or other key information.
1.3 Safety instructions and notices
The following icons and signal words are used in this document to indicate dangers and important safety
information:

General information
INTORQ | BA 14.0199 | 10/2020 7
Structure of safety notices:
CAUTION
Icon
Indicates the type of danger
Signal word
Characterizes the type and severity of danger.
Notice text
Describes the danger.
Possible causes
List of possible consequences if the safety notices are disregarded.
Protective measures
List of protective measures required to avoid the danger.
Danger level
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death or seri-
ous injury.
WARNING
WARNING indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE
Notice about a harmful situation with possible consequences: the product itself or sur-
rounding objects could be damaged.
1.4 Terminology used
Term In the following text used for
Spring-applied brake Spring-applied brake with electromagnetic release
Drive system Drive systems with spring-applied brakes and other drive compo-
nents
Cold Climate Version (CCV) Version of the spring-applied brake suited for particularly low
temperatures

General information
INTORQ | BA 14.0199 | 10/2020 8
1.5 Abbreviations used
Letter symbol Unit Designation
FRN Rated frictional force
F N Spring force
I A Current
IHA Holding current, at 20 °C and holding voltage
ILA Release current, at 20 °C and release voltage
INA Rated current, at 20 °C and rated voltage
M4Nm Torque that can be transmitted without slippage occurring (DIN VDE 0580)
MANm Tightening torque of fastening screws
Mdyn Nm Average torque from initial speed to standstill
MKNm Rated torque of the brake, rated value at a relative speed of rotation of
100 rpm
nmax rpm Maximum occurring speed of rotation during the slipping time t3
PHW Coil power during holding, after voltage change-over and 20 °C
PLW Coil power during release, before voltage change-over and 20 °C
PNW Rated coil power, at rated voltage and 20 °C
Q J Quantity of heat/energy
QEJMax. permissible friction energy for one-time switching, thermal parameter of
the brake
QRJ Braking energy, friction energy
QSmax JMaximally permissible friction energy for cyclic switching, depending on the
operating frequency
RNOhms Rated coil resistance at 20 °C
Rzμm Averaged surface roughness
Sh1/h Operating frequency: the number of switching operations evenly spread over
the time unit
Shue 1/h Transition operating frequency, thermal parameter of the brake
Shmax 1/h Maximum permissible operating frequency, depending on the friction energy
per switching operation
sLmm Air gap: the lift of the armature plate while the brake is switched
sLN mm Rated air gap
sLmin mm Minimum air gap
sLmax mm Maximum air gap
t1ms Engagement time, sum of the delay time and braking torque: rise time
t1 = t11 + t12
t2ms Disengagement time, time from switching the stator until reaching 0.1 Mdyn

General information
INTORQ | BA 14.0199 | 10/2020 9
Letter symbol Unit Designation
t3ms Slipping time, operation time of the brake (according to t11) until standstill
t11 ms Delay during engagement (time from switching off the supply voltage to the
beginning of the torque rise)
t12 ms Rise time of the braking torque, time from the start of torque rise until reach-
ing the braking torque
tue s Over-excitation period
U V Voltage
UHV DC Holding voltage, after voltage change-over
ULV DC Release voltage, before voltage change-over
UNV DC Rated coil voltage; in the case of brakes requiring a voltage change-over,
UN equals UL

Safety instructions
INTORQ | BA 14.0199 | 10/2020 10
2 Safety instructions
2.1 General safety instructions
¾
Never operate INTORQ components when you notice they are damaged.
¾
Never make any technical changes to INTORQ components.
¾
Never operate INTORQ components when they are incompletely mounted or incompletely connected.
¾
Never operate INTORQ components without their required covers.
¾
Only use accessories that have been approved by INTORQ.
¾
Only use original spare parts from the manufacturer.
Keep the following in mind during the initial commissioning and during operation:
¾
Depending on the degree of protection, INTORQ components may have both live (voltage carrying),
moving and rotating parts. Such components require the appropriate safety mechanisms.
¾
Surfaces can become hot during operation. Take the appropriate safety measures (to ensure contact/
touch protection).
¾
Follow all specifications and information found in the Operating Instructions and the corresponding
documentation. These must be followed to maintain safe, trouble-free operations and to achieve the
specified product characteristics.
¾
The installation, maintenance and operation of INTORQ components may only be carried out by quali-
fied personnel. According to IEC 60364 and CENELEC HD 384, skilled personnel must be qualified in
the following areas:
– Familiarity and experience with the installation, assembly, commissioning and operation of the
product.
– Specialist qualifications for the specific field of activity.
– Skilled personnel must know and apply all regulations for the prevention of accidents, directives,
and laws relevant on site.
2.2 Disposal
The INTORQ components are made of various differing materials.
¾
Recycle metals and plastics.
¾
Ensure professional disposal of assembled PCBs according to the applicable environmental regulations.

Product description
INTORQ | BA 14.0199 | 10/2020 11
3 Product description
3.1 Proper and intended usage
3.1.1 Standard applications
INTORQ components are intended for use in machinery and facilities. They may only be used for pur-
poses as specified in the order and confirmed by INTORQ. The INTORQ components may only be oper-
ated under the conditions specified in these Operating Instructions. They may never be operated beyond
their specified performance limits. The technical specifications (refer to Technical specifica-
tions,Page13) must be followed to comply with the proper and intended usage. Any other usage is con-
sider improper and prohibited.
3.2 Layout
Fig.1: Design of the INTORQ BFK470 spring-applied brake: Complete stator + rotor + flange
AStator BBore holes (optional) CSocket-head cap screw
DHand-release (optional) ECoil FRotor
GHub HPressure spring IArmature plate
JFlange (optional) KSetting screw for the factory-set
adjustment of the spring force
(sealed), applies only to sizes
12–18

Product description
INTORQ | BA 14.0199 | 10/2020 12
3.3 Function
This brake is an electrically releasable spring-applied brake with a rotating brake disk (rotor) that is
equipped on both sides with friction linings. In its de-energized state, the rotor is clamped with braking
force applied by pressure springs between the armature plate and a counter friction surface. This corre-
sponds to a fail-safe functionality.
The brake torque applied to the rotor is transferred to the input shaft via a hub that has axial gear teeth.
The brake can be used as a holding brake, as an operating brake, and as an emergency stop brake for
high speeds.
The asbestos-free friction linings ensure a safe braking torque and low wear.
To release the brake, the armature plate is released electromagnetically from the rotor. The rotor, shifted
axially and balanced by the spring force, can rotate freely.
3.4 Braking and release
During the braking procedure, the pressure springs use the armature plate to press the rotor (which can
be shifted axially on the hub) against the friction surface. The braking torque is transmitted between the
hub and the rotor via gear teeth.
When the brakes are applied, an air gap (sL) is present between the stator and the armature plate. To re-
lease the brake, the coil of the stator is energized with the DC voltage provided. The resulting magnetic
flux works against the spring force to draw the armature plate to the stator. This releases the rotor from the
spring force and allows it to rotate freely.
3.5 Project planning notes
¾
When designing a brake for specific applications, torque tolerances, the limiting speeds of the rotors,
the thermal resistance of the brake and the effects of environmental influences must all be taken into
account.
¾
The brakes are dimensioned in such a way that the specified rated torques are reached safely after a
short run-in process.
¾
However, as the organic friction linings used do not all have identical properties and because environ-
mental conditions can vary, deviations from the specified braking torques are possible. These must be
taken into account in the form of appropriate dimensioning tolerances. Increased breakaway torque is
common in particular after long downtimes in humid environments where temperatures vary.
¾
If the brake is used as a pure holding brake without dynamic load, the friction lining must be reacti-
vated regularly.
3.6 Optional configuration
3.6.1 Optional CCV
The Cold Climate Version (CCV) allows the brake to be operated at lower ambient temperatures.
3.6.2 Hand-release (optional)
To temporarily release the brake when there is no electricity available, a hand-release version is available
as an option.

Technical specifications
INTORQ | BA 14.0199 | 10/2020 13
4 Technical specifications
4.1 Possible applications of the INTORQ spring-applied brake
¾
Degree of protection:
– The brake is designed for operation under the operating conditions that apply to IP66 protection.
Because of the numerous possibilities of using the brake, it is still necessary to check the function-
ality of all mechanical components under the corresponding operating conditions.
¾
Ambient temperature:
– -20 °C to +50 °C (Standard)
– -40 °C to +50 °C (Cold Climate Version: CCV)
4.2 Rated data
Size Max. speed 1)
nmax
Temperature
class
stator
Duty
cycle
Moment of inertia
of rotor
JRotor
Weight of brake
without hand-release with hand-release
[rpm] [%] [kg cm2]
without
flange
With
flange
without
flange
With
flange
[kg] [kg] [kg] [kg]
06 6000 F (155 °C) 100 0.15 1.3 1.5 1.4 1.6
08 5000 F (155 °C) 100 0.61 2.0 2.2 2.1 2.3
10 4000 F (155 °C) 100 2.0 3.5 3.9 3.7 4.0
12 3600 F (155 °C) 100 4.5 5.0 5.6 5.3 5.8
14 3600 F (155 °C) 100 6.3 7.7 8.5 8.1 8.9
16 3600 F (155 °C) 100 15.0 11.9 13.1 12.5 13.7
18 3600 F (155 °C) 100 29.0 17.6 19.1 18.6 20.0
Tab.1: General data
1) Maximum speed of rotation when installed horizontally (for higher speeds, contact the manufacturer)

Technical specifications
INTORQ | BA 14.0199 | 10/2020 14
Size Air gap Rotor thickness
SLN
1) SLmax Min. New state
[mm]
Operating brake
[mm]
Holding brake
[mm]
Operating brake
[mm]
Holding brake
[mm] [mm]
06 0.2 +0.08 / -0.05 0.5 0.3 5.73 5.93 6.0 -0.05
08 0.2 +0.08 / -0.05 0.5 0.3 6.73 6.93 7.0 -0.05
10 0.2 +0.13 / -0.05 0.5 0.35 8.73 8.88 9.0 -0.1
12 0.3 +0.08 / -0.10 0.6 0.45 9.68 9.83 10.0 -0.1
14 0.3 +0.10 / -0.10 0.75 0.45 9.55 9.85 10.0 -0.1
16 0.3 +0.15 / -0.05 0.80 0.50 11.05 11.35 11.5 -0.1
18 0.4 +0.20 / -0.10 1.0 0.65 12.50 12.85 13.0 -0.1
Tab.2: Air gap and rotor thickness
1) The default (as delivered) air gap results from the sum tolerances of the individual components.
Size Outer diameter Screw hole circle Fastening screws 1) Minimum thread depth
of motor end shield
Tightening
torque
Diameter
(Ø)
Thread1) without
flange
With
flange
without
flange
With
flange
MA
[mm] [mm] [mm] [mm] [mm] [mm] [Nm]
06 89 72 M4 3x M4x40 3x M4x45 7.5 9.0 3.0
08 106 90 M5 3x M5x45 3x M5x50 10.5 10.0 5.9
10 130 112 M6 3x M6x55 3x M6x60 14.0 13.5 10.1
12 148 132 M6 3x M6x60 3x M6x65 12.5 12.5 10.1
14 168 145 M8 3x M8x75 3x M8x80 19.5 18.5 24.6
16 200 170 M8 3x M8x80 3x M8x85 18.0 17.0 24.6
18 226 196 M8 6x M8x90 6x M8x100 19.5 23.0 24.6
Tab.3: Mounting data
1) Fastening screws (socket-head cap screws according to DIN EN ISO 4762) are included in the scope of delivery

Technical specifications
INTORQ | BA 14.0199 | 10/2020 15
CAUTION
Functional incapacity of the brake
It is very important to comply with the minimum thread depth of the end shield (refer to the
Mounting data,Page14 table).
If the required thread depth is not maintained, the fastening screws may run onto the
thread root. This has the effect that the required pre-load force is no longer established –
the brake is no longer securely fastened!
The material of the end shield must have a tensile strength of Rm > 250 N/mm2 !
Size Rated torque
[Nm]
100 rpm
Braking torque at Δn0 [% of the rated
torque]
Max. rotation
speed Δn0max
1500 3000 Max. [rpm]
06 2.0 / 2.5 / 3.0 / 3.5 / 4.0 / 4.5 / 5.5 / 6.0 /
6.5 / 7.0 / 7.5 87 80 74 6000
08 3.5 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 14 / 15 85 78
73
5000
10 7 / 9 / 11 / 14 / 16 / 18 / 21 / 23 / 25 / 28 /
30 / 33 / 36 83 76 4000
12 12 / 14 / 15 / 16 / 18 / 23 / 27 / 32 / 36 /
40 / 45 / 46 / 48 / 50 / 55 81 74
3600
14 25 / 35 / 40 / 45 / 50 / 55 / 60 / 65 / 70 /
75 / 80 / 100 / 110 80 73 72
16 35 / 45 / 55 / 60 / 70 / 80 / 90 / 100 / 105 /
125 / 150 79 72 70
18 65 / 80 / 100 / 125 / 130 / 150 / 165 /
185 / 200 / 235 / 250 77 70 68
Tab.4: Brake torques

Technical specifications
INTORQ | BA 14.0199 | 10/2020 16
Size Electrical power
P20
1)
Rated voltage
UN
Rated current
IN
Coil resistance
RN
[W] [V] [A] [Ω] ±8%
06
20
12 1.667 7.2
20 1.000 20.0
24 0.833 28.8
32 0.625 51.2
42 0.476 88.2
70 0.286 245.0
96 0.208 460.8
103 0.194 530.5
127 0.158 806.0
21 150 0.140 1071.0
20
170 0.118 1445.0
180 0.111 1620.0
190 0.105 1805.0
205 0.098 2101.0
215 0.093 2311.0
225 0.089 2531.0
23 250 0.092 2717.0

Technical specifications
INTORQ | BA 14.0199 | 10/2020 17
Size Electrical power
P20
1)
Rated voltage
UN
Rated current
IN
Coil resistance
RN
[W] [V] [A] [Ω] ±8%
08
25
12 2.083 5.76
24 1.250 16.0
20 0.833 28.8
32 0.781 40.96
42 0.595 70.56
70 0.357 196.0
96 0.260 368.6
103 0.194 530.5
27 127 0.213 597.4
25
150 0.167 900.0
170 0.147 1156.0
180 0.111 1620.0
190 0.132 1444.0
205 0.098 2101.0
215 0.116 1849.0
225 0.111 2025.0
27 250 0.108 2314.0

Technical specifications
INTORQ | BA 14.0199 | 10/2020 18
Size Electrical power
P20
1)
Rated voltage
UN
Rated current
IN
Coil resistance
RN
[W] [V] [A] [Ω] ±8%
10
30
12 2.500 4.8
20 1.500 13.33
24 1.250 19.2
32 0.938 34.1
42 0.714 58.8
70 0.429 163.3
31 96 0.323 297.3
32 103 0.311 331.5
30
127 0.236 537.6
150 0.200 750.0
170 0.176 963.3
32 180 0.178 1013.0
30 190 0.158 1203.0
33 205 0.161 1273.0
30 215 0.140 1540.83
32 225 0.142 1582.0
30 250 0.120 2083.0
12 40
12 3.333 3.6
20 2.000 10.0
24 1.667 14.4
32 1.267 25.16
42 0.952 44.128
70 0.571 122.5
96 0.417 230.4
103 0.388 265.2
127 0.315 403.2
150 0.267 562.5
170 0.235 722.5
180 0.222 810.0
190 0.211 902.5
205 0.195 1051.0
215 0.186 1156.0
225 0.178 1266.0
42 250 0.168 1488.0

Technical specifications
INTORQ | BA 14.0199 | 10/2020 19
Size Electrical power
P20
1)
Rated voltage
UN
Rated current
IN
Coil resistance
RN
[W] [V] [A] [Ω] ±8%
14
61 24 2.542 9.443
60 103 0.583 176.817
180 0.333 540.0
63
205 0.307 667.063
288 0.219 1316.571
310 0.203 1525.4
16 68
24 2.833 8.471
103 0.660 156.015
180 0.378 476.471
205 0.332 618.015
288 0.236 1219.765
18 85
24 3.542 6.776
103 0.825 124.8
180 0.472 381.176
205 0.415 494.412
Tab.5: Coil data
1) Coil power at 20°C in W, deviation up to +10% is possible depending on the selected connection voltage.

Technical specifications
INTORQ | BA 14.0199 | 10/2020 20
4.3 Switching times
The operating times listed here are guide values which apply to DC switching with rated air gap sLN, warm
coil and standard characteristic torque. The operating times given are mean values and subject to varia-
tions. The engagement time t1 is approximately 8 to 10 times longer for AC switching.
t
t
M
t2
t12
t11
t1
Mdyn
U
0.1Mdyn
Fig.2: Operating/switching times of the spring-applied brakes
t1Engagement time t11 Delay time during engagement
t2Disengagement time (up to M = 0.1 Mdyn)t12 Rise time of the braking torque
Mdyn Braking torque at a constant speed of rotation UVoltage
Size Rated brake torque
at Δn=100 rpm
MK
QEShue Operating times 1)
DC engagement2) Disengaging
t11 t12 t1t2
[Nm] [J] [1/h] [ms] [ms] [ms] [ms]
06 4 3000 79 16 25 41 32
08 8 7500 50 30 26 56 52
10 16 12000 40 40 46 86 107
12 32 24000 30 47 34 81 121
14 60 30000 28 30 47 76 162
16 80 36000 27 46 62 109 225
18 150 60000 20 62 92 155 343
Tab.6: Switching energy - operating frequency - operating times
1) The switching times listed are guide values for brakes with standard characteristic torques for switching on the DC
side, with rated air gap sLN and warm coil. Brakes with a lower characteristic torque enable the brakes to open more
quickly (t2), but also take longer to build up torque (t1). Brakes with a higher characteristic torque exhibit the corre-
spondingly reverse behavior.
2) Measured with induced voltage limitation of -800 V DC