Peter electronic VB 230-25 Training manual

electronic
Quality is our Drive.
Braking Devices
VB 230/400-25
Assembly- and Commissioning Instructions

VB 230/400-25 1
as per 12/18 11900.10004
Table of Contents Page
1. Safety notes 3
2. Conformity 3
3. General description 4
4. Usage to the intended purpose 4
5. EC Declaration of Conformity 5
6. Block diagram 6
7. Functional description (see connection diagram) 6
7.1 LED indicators 7
7.2 Fault signaling relay 7
8. Control inputs and outputs 8
8.1 Control inputs 8
8.2 Control outputs 8
8.3 Control outouts – optional 8
9. Potentiometers 9
10. Options 9
10.1 Option „B“ – Wide-voltage-range-capable 9
10.2 Option „P“ - Motor PTC monitoring 9
10.3 Option „D“ – Star-delta starting 9
10.4 Option „S“ – Standstill signaling relay 10
11. Technical data 11
11.1 Ambient conditions 11
12. Commissioning 12
12.1 Mounting instructions 12
12.2 Connection 13
12.3 Parameter settings 14
13. Dimensioning rules 15
13.1 Dimensioning of braking contactors 15
13.2 Dimensioning of pre-fuses 15
13.3 Permissible braking frequency 17
14. Dimensions 18

2 VB 230/400-25
Notes and symbols used in these instructions
Note: Notes explain the advantages of certain adjustments or settings and help
you to make use of the device in the best possible way.
Warning notices: Read them carefully and follow them strictly!
Warning notices are indicated in order to protect you against danger or to
help you to prevent the device from being damaged.
Caution: Danger to life through electric shock!
When you see this sign, always make sure that the device is de-energized
and secured against unintentional energizing.
These commissioning instructions were prepared with great care. Nevertheless, PETER
electronic GmbH & Co. KG does not assume liability for damage resulting from mistakes
possibly contained in this manual. Technical changes that serve to improve the product are
subject to change without notice.
Disposal Instructions
Equipment containing electrical components may not be disposed of
together with domestic waste. It must be collected separately as electrical
and electronic waste according to local and currently valid legislation.
15. Typical connections 19
15.1 Connection diagram 19
15.2 Connection diagram with all options 20
15.3 Connection diagramm for VB...-25DB (UL), cut off 1L1, 3L2 21

VB 230/400-25 3
1. Safety notes
The described devices are electrical equipment for use in industrial electrical power
installations. An impermissible removal of the covers during operation can cause
serious damage to your health, since these devices contain live parts with high
voltages.
Adjustment work may only be performed by trained staff observing the safety regulations.
Assembly and mounting work may only be carried out with the equipment deenergized.
Make sure that all drive components are properly earthed.
Please read these commissioning instructions carefully before putting the device into operation.
Besides, the user must ensure that the devices and associated components are fitted and
connected in accordance with the appliable local, legal and technical regulations. The VDE-
regulations VDE 0100, VDE 0110 (EN 60664), VDE 0160 (EN 50178) , VDE 0113 (EN 60204,
EN 61310),VDE 0660 (EN 50274) plus the appropriate regulations of the TÜV (Technical Control
Association) and the trade associations apply in Germany.
The user must ensure that the drive turns into a safe operating state following a device failure, in
the event of maloperation, or if the control unit has failed etc..
Caution: Even if the motor is at rest, it is not physically separated from the mains.
2. Conformity
In industrial linguistic usage the electronic brakes of the type series VersiBrake... are called
"devices", however, in the sense of the "device-safety-law", the "EMC-law" or the "EC machinery
directive" they are not devices or machines ready for use or connection but they are components.
It is only possible to define their final function, when these components are integrated into the
design and construction of the user.
To be able to use the devices to their intended purpose, it requires power supply networks
according to DIN EN 50160 (IEC38).
The user takes the responsibility that the user’s design and construction comply with the appli-
cable legal provision.
The commissioning is strictly forbidden as long as the conformity of the final product with the
guidelines 2006/42/EC (Machinery directive) and 2006/95/EC (Low voltage directive) is not
proved.

4 VB 230/400-25
3. General description
The electronic braking devices of the VersiBrake type enable a non-wearing braking of three-
phase and a.c. asynchronous motors. The braking devices are used for drives that due to safety
and functional reasons have to be reliably slowed down. After the motor has come to a standstill,
an integrated standstill detection switches the braking current off. A potential-free relay contact
indicates if the motor has not come to a standstill within the maximum braking time.
Special features
• controlled by microcontroller
• wear-resistant and maintenance-free
• retrofitting into existing plants possible
• also available for special voltages
• for all asynchronous motors
• integrated braking contactor (devices up to 60A)
• automatic remanence time optimization
• overcurrent detection
• motor PTC monitoring with option „P“
• start-delta starting control with option „D“
• standstill signaling relay with option „S“
• wide-voltage-range-capable with option „B“
Warning note:
Prior to using the standstill signaling contact for safety-directed purposes, it
is necessary to subject the application to a risk assessment according to
EN 1050 (ISO 14121).
4. Usage to the intended purpose
The devices of the VersiBrake series are electrical equipment that is used in industrial electrical
power installations. They are designed for the application in machines, in order to slow down
rotating masses on drives with three-phase induction motors.
Typical applications
• sawing machines
• centrifuges
• wood working machines
• conveying machines
• textile machinery

VB 230/400-25 5
5. EC Declaration of Conformity
EC Declaration of Conformity
The manufacturer / company placing the product on the market
(authorized representatives of the manufacturer / companies placing the product on the market
that are established within the Community)
Name / Address: PETER electronic GmbH & Co. KG
Bruckäcker 9
92348 Berg
hereby declares that the following product (device, component, unit) in the version as supplied
Product designation: Braking device
Series / type designation: VB ... - 25 ..
Article number: 219..., 252..., 262..., 298...
Year of manufacture: 2001
complies with the provisions of the following EU-directives:
2014/30/EU
2014/35/EU
2011/65/EU
This EC Declaration of Conformity is no longer valid, if the product is modified or changed
without our agreement.
This declaration is issued under the sole responsibility of the signatory.
Berg, 15.04.2016 Dr. Thomas Stiller, Managing director
(place, date) (signatory and function of the signatory) (signature)
Electromagnetic compatibility
Electrical equipment designed for use within certain voltage limits
The restriction of the use of certain hazardous substances in
electrical and electronic equipment
The following harmonized standards have been applied:
EN 60947-1:2007+A1:2012
EN 60947-4-2:2012
Low-voltage switchgear and controlgear General rules
Low-voltage switchgear and controlgear
Contactors and motor-starters - AC semiconductor motor
controllers and starters

6 VB 230/400-25
6. Block diagram
7. Functional description (see connection diagram)
After switching on the operating voltage on 1L1 and 3L2, the main contactor interlock X5, X6
(lock) and the fault signalling contact X7, X8 (alarm) close. The motor can be started.
A starting logic makes sure that braking is not yet initiated when the plant is switched on with the
master switch while the motor is still switched off.
The fully automatic run of the braking interval starts with the switch-off of the motor contactor
which at the same time closes the contact X3, X4 (start). In the case of very dirty or corroded
control contacts, it may happen that the current of 10mA required for starting cannot flow via the
contacts X3 and X4, as a result of which a braking operation is not started either. In such cases, it
is necessary either to change the control contact or to connect a relay as a link between the
control contact of the motor contactor and the starting contacts X3 and X4. During braking, the
main contactor is interlocked via the contact X5, X6 (lock). After a delay time which, dependent on
the amount of the remanent voltage of the motor, optimizes itself, the braking relay pulls in. Then
an adjustable d.c. voltage is applied to the motor winding. The magnetic field resulting from this
has a braking effect on the still rotating rotor. The d.c. voltage is generated by a thyristor phase
control. Special circuits protect the power semiconductors against overvoltage. With the potentio-
meter "I" the braking torque can be adjusted in wide ranges. Experience shows that a braking
current 2.5 times as high as the rated motor current has a good braking effect.
Adjustments exceeding the rated motor current are indicated by a flashing „ready“-LED.
1L1 3L2 MOTORCONTACTOR
24V
5V
Controller
Braking relay
Remanence
detection
Standstill
detection
2T1 4T2 6T3
Motor contactor
interlocking
Y - Contactor
- Contactor
Standstill
indication
optional
Fault
indication
optional
PTC
X1 X2
optional

VB 230/400-25 7
Approx. 1.5s after a motor standstill has been detected, the integrated standstill detection function
switches the braking current off.
If during the maximum braking time (15s in the case of standard devices) no motor standstill is
detected, the fault signaling contact on the terminals X7, X8 (alarm) opens. When restarting the
motor, the signaling contact will be reset.
Warning note:
In the case of some motor types no standstill will be detected if the braking
current exceeds four times the amount of the rated motor current. In this
case it is possible that a very high braking current flows over the maximum
braking time. Therefore, in order to protect the motor and the braking
electronics, it is absolutely necessary to check the braking current with a true
r.s.m. measuring instrument when putting the device into operation. In this
case, simple multimeters and clamp-on probes give wrong measurements,
since they are only suitable for pure sine-wave forms and not for phase
control.
Note: If, due to the fact that heavy rotating masses are to be slowed down, the
braking time at rated device current is still too long, a device of the next
higher performance category is to be used.
7.1 LED indicators
7.2 Fault signaling relay
The following states on the fault signaling contact (terminal X7, X8) are possible:
LED – ready- illuminated
- flashing
Mains voltage is applied, braking device is ready.
Braking current is higher than rated device current.
LED – I - illuminated Braking current flows.
No voltage applied to VersiBrake Contact X7, X8 open
Voltage applied to VersiBrake, no fault Contact X7, X8 closed
Overtemperature at the motor, only with option „P“ Contact X7, X8 open
No standstill is reached during monitoring time Contact X7, X8 open a
a. Closes at motor restart.

8 VB 230/400-25
8. Control inputs and outputs
8.1 Control inputs
Caution: Danger to life through electric shock!
The terminals X3 and X4 carry mains potential. If a switch or contactor
contact is connected to these terminals, it must have a test voltage of 2.5kV.
8.2 Control outputs
8.3 Control outouts – optional
Control
terminals
Designation Description
X3, X4 Starting contact Connection of a break contact of the motor contactor
Control
terminals
Designation Description
X5, X6 Interlock The interlock prevents the motor from being switched on
during braking.
Loop the normally closed contact into the branch of the
motor contactor.
X7, X8 Fault signal In the case of a fault this fault signaling contact opens.
For closer details on the tripping characteristics please
see chapter 5.2, page 6.
Control
terminals
Designation Description
X16, X17 Standstill indica-
tion in the case of
option „S“
In the case of standstill-dependent braking, a contact
can be evaluated. For closer details regarding the trip-
ping behavior please refer to chapter 8.4 on page 9.
X12, X11 Υ - contactor with
option „D“
Control contact for the star contactor. For closer details
please refer to chapter 8.3 on page 9.
X12, X13 Δ - contactor with
option „D“
Control contact for the delta contactor. For closer
details please refer to chapter 8.3 on page 9.

VB 230/400-25 9
9. Potentiometers
10. Options
For special applications there are various options in order to extend the functionality of Versi-
Brake-devices.
The following is available: Wide-voltage range 200-575V (480V) - Option „B“
Motor PTC monitoring - Option „P“
Star-delta starting control - Option „D“
Standstill signaling relay - Option „S“
10.1 Option „B“ – Wide-voltage-range-capable
With this option it is possible to use the VersiBrake–devices within a mains voltage range from
200 to 575V (UL-certificated devices: 200...480V).
This requires a AC-control voltage that is to be connected to the terminals X1, X2. The height of
the control voltage is on the nameplate an on the terminals (24VAC / 230VAC).
Note! In the case of standard devices these options are not available, even if the
terminals are there.
The required options have to be expressly ordered.
10.2 Option „P“ - Motor PTC monitoring
This option enables a simple monitoring of the motor temperatur. It is possible to evaluate up to
6PTC-thermistors or thermostats (normally closed contact) connected in series.
The contact X7, X8 (alarm) opens when the cut-out temperature value is reached. The contact
remains open until the temperature falls below this value again, at least, however, for a period of
240s.
This monitoring function is able to detect overtemperatures and open circuits, but no short circuits
of the PTC thermistors or thermostats.
Caution: Danger to life through electric shock!
The terminals X14 and X15 carry mains potential; when laying the
connecting leads make sure to protect them against inadvertent contact.
10.3 Option „D“ – Star-delta starting
If star-delta starting is requested, it is possible with this option to control the power contactors.
In this case, a normally closed contact of the mains contactor is connected to X3, X4 (start) (see
connection diagram with options).
„I“ Adjusting the braking current.

10 VB 230/400-25
The closing of the mains contactor starts the following sequence:
1. The potential-free contact X11, X12 will be closed (control of the star contactor).
2. After a period of 6s X11, X12 will be opened.
3. After a delay of 60ms the potential-free contact X12, X13 will be closed (control of the delta
contactor).
The opening of the mains contactor starts the following sequence:
1. The contact X12, X13 will be opened (delta contactor will be switched off).
2. After the drop of the remanent voltage, X11, X12 will be closed (control of the star
contactor).
3. When the contact bounce time is over, the braking current will flow for approx. 1.5s after
the motor standstill.
In the case of star-delta starting, even if not implemented via the VersiBrake device, the star
contactor should be controlled via the contact on the terminals 11 and 12 (option „D“) to initiate
braking. Thus, the motor windings are interconnnected in time before the actual braking
operation.
Note: To ensure that, in the case of external star-delta control, the starting
operation is not influenced by the VersiBrake, a break contact of the motor
contactor K1 has to be connected in series before the terminals 11 and 12.
10.4 Option „S“ – Standstill signaling relay
This option makes the motor standstill signal available on a potential-free contact (X16, X17).
Possible states on X16, X17:
Warning note:
Prior to using the standstill signaling contact for safety-directed purposes, it
is necessary to subject the application to a risk assessment according to
EN 1050 (ISO 14121).
No voltage applied to VersiBrake Contact X16, X17 opened
Voltage applied to VersiBrake Contact X16, X17 closed
Motor contactor K1 pulled in (X3, X4 opened),
motor runs
Contact X16, X17 opened
Motor contactor K1 dropped out (X3, X4 closed),
motor brakes
Contact X16, X17 opened
Motor contactor K1 dropped out (X3, X4 closed),
motor stands still
Contact X16, X17 closed

VB 230/400-25 11
11. Technical data
11.1 Ambient conditions
Note: Please pay attention and consider for the operation of IE3 motors while
dimensioning of dc brakes the resulting higher starting currents.
For the use of IE3 motors we highly recommend to dimension and design
the needed braking devices one size higher.
Type designation VB .... 230-25
400-25
Mains voltage
according to DIN EN 50160 (IEC 38)
220/240V ±10% 50/60Hz (standard)
380/415V ±10% 50/60Hz (standard)
200 - 575V ±10% 50/60Hz (wide-voltage range)
Power draw of the electronics 6 VA
Recommended for rated motor currents
up to
12,5A
Recommended for rated motor currents
on IE3 Motors up to
9A
Rated device current 25A
c.d.f. at max. braking current 8%
I²t - Value power semidonductor 1250 A²s
Braking voltage 0 ... 130VDC at 220/240V (standard)
0 ... 220VDC at 380/415V (standard)
0 ... 310VDC (wide-voltage range) (575V)
max. Braking time 15sec. (other times upon request)
Contact rating of the output relays 6A/250V AC
Delay time for reduction of residual e.m.f. self-optimizing
(100 ... 2500ms)
max. Cross-sectional area /
connecting cable 2 x 2,5mm² per terminal
Tigthening torque max. 0.8Nm
Storage temperature -25 ... 75°C
Operating temperature 0 ... 45°C
Degree of protection IP 20
Environment Overvoltage category III, pollution degree 2

12 VB 230/400-25
12. Commissioning
:The device is to be put into opteration in 3 steps:
1. Mounting
2. Connection and
3. Parameter setting
12.1 Mounting instructions
Caution: Danger to life through electric shock!
The following conditions are to be complied with in order to ensure a safe
and reliable operation of the VersiBrake:
1. The device series VersiBrake is to be used under overvoltage conditions of the
category III.
2. Make sure that pollution degree 2 or better, in accordance with IEC664, is
complied with.
3. The device is to be installed into a housing (min. degree of protection: IP54).
4. The device must be operated without being exposed to contamination by
water, oil, carbon deposits, dust, etc.
5. Insert in North America, UL and CSA-listed.
5.1 „Suitable For Use On A Circuit Capable Of Delivering Not More Then 5kA rms
Symmetrical Amperes, 480 Volts Maximum.“
5.2 „Use Copper Conductors 60/75°C or 75°C only.
Warning:
Make sure that a minimum distance to adjoining devices is kept. Above and
underneath the housing a minimum distance of 50mm is to be kept.

VB 230/400-25 13
12.2 Connection
The braking device is to be installed according to the attached connection diagram. For other
connections please consult Peter electronic GmbH & Co. KG.
Note: Further connection proposals for special circuit arrangements are available
via our homepage at www.peter-electronic.com.
Note: Prior to putting the motor brake into operation, the wiring has to be checked.
To ensure a reliable function it is necessary to comply with the interlocking conditions:
1. To initiate braking, a potential-free normally closed contact of the main contactor is
necessary, i.e., when the motor contactor is dropped out, the terminals X3, X4 (start) of the
braking device are connected.
2. The interlocking contact of the braking device (terminals X5, X6 (lock)) has to be looped
into the control circuit of the motor contactor, so that the motor contactor cannot pull in
during braking.

14 VB 230/400-25
12.3 Parameter settings
Sequence of commissioning:
1. Disconnect the plant from the supply mains.
2. Connect the current measuring instrument between the braking device, terminal „2T1“, and
the motor terminal „U“.
3. Turn the potentiometer "I" to a position in the first third of the adjustment range (factory
setting) (please see chapter 7 on page 8).
4. Switch on the plant.
5. Initiate braking by switching the motor contactor ON and OFF.
Note: The adjustment of the braking current requires a moving-iron instrument.
Clamp-on probes or digital multimeters may only be used if they can
measure the true r.m.s..
Adjusting the braking current
The braking current is to be adjusted to a value as small as possible, in order to avoid
unnecessary heating of the power semiconductors and the motor. This is especially important in
the case of frequent operation. We recommend to limit the maximum braking current to 2.5 times
the rated motor current.
The requested braking torque is to be adjusted with the potentiometer "I". It is important that the
braking current does not exceed the rated device current which is indicated on the nameplate of
the device.
A braking current higher than the rated device current causes a flashing „ready“-LED. In this
case, the potentiometer „I“ has to be turned back to a position where the flashing goes over into a
steady light.
The braking current can be measured with a clamp-on ammeter (True RMS) or a corresponding
moving iron amperemeter at the output terminal "4T2" of the braking device.
Attention:
When the „ready“-LED is flashing, the current flowing in the device is approx.
1.3 times as high as the rated device current. Operating the device with the
LED flashing and utilizing the permissible braking frequency will cause that
the braking device is overloaded and consequently destroyed.
Adjusting the braking time
An adjustment is not necessary, since 1.5s after the motor has come to a standstill the braking
current will be automatically switched off.
If during the maximum braking time (15s in the case of standard devices) no standstill is detected,
the braking current will be switched off after this time. This case will be indicated by an opening of
the potential-free contact (X7, X8).
Note! All data sheets and commissioning instructions are available on our
homepage at www.peter-electronic.com.

VB 230/400-25 15
13. Dimensioning rules
13.1 Dimensioning of braking contactors
The braking contactor is switched on or off via a control contact of the braking device (no-load
switching).
When selecting the braking contactor, it must be ensured that the contacts are able to carry the
maximally occuring braking current (nominal/rated device current). Therefore, the value „conven-
tional thermal current“ (Ith) is decisive when selecting the braking contactor.
If this value is not indicated, the rated operational current for AC1-operation may be used instead.
Tip: By connecting contacts in parallel it is often possible to use a lower-priced
contactor of a smaller design.
13.2 Dimensioning of pre-fuses
Basically, two types of fuse protection are available for the user:
1. Fusing according to allocation type „1“, DIN EN 60947-4-2.
After a short circuit, the braking device is allowed to be inoperative.
2. Fusing according to allocation type „2“, DIN EN 60947-4-2.
After a short circuit, the braking device must be suitable for further use. However, there is
the danger that the contacts of the braking relay (braking contactor) weld. Therefore, if
possible, these contacts are to be checked prior to reconnecting the device to the supply. If
this check cannot be carried out by the user, the device has to be returned to the producer
in order to have it checked.
The following dimensioning information refers to the below operating conditions:
• Use of standard asynchronous motors
• Braking time not exceeding 20s, for braking devices up to 36A.
• Braking time not exceeding 40s, for braking devices from 40A up.
• Braking current not exceeding 2.5x INOM of the motor.
• Cyclic duration factor (c.d.f.) not exceeding the value indicated in the data sheet.

16 VB 230/400-25
Fusing according to allocation type „1“:
As pre-fuses, we recommend to use line protection fuses (utilization category gL) or automatic
circuit-breakers with tripping characteristic B, C, D or K.
Taking into account the maximum braking currents that occur (normally the nominal/rated device
current), we recommend fuses according to table 2, column 3.
Note: Wiring cross-sectional area according to DIN VDE 0100-430,
DIN EN 57100-430.
Fusing according to allocation type „2“:
The power semiconductors are to be protected by fuses of the utilization category gR/aR
(semiconductor fuses, high-speed fuses). However, since these fuses do not ensure line
protection, it is necessary to use additionally line protection fuses (utilization category gL/gG).
As for the dimensioning of the line protection fuse (gL/gG), please refer to table 2, column 3.
To protect the semiconductors it is necessary to select gR/aR-fuses featuring cutoff-I²t-values of
the ranges indicated in table 2, column 4. In this connection, the current value of the selected fuse
should not be smaller than the braking current to be expected (nominal/rated device current).
Note 1: On the basis of the recommended I²t-value, braking current, and possibly the
c.d.f., the fuse supplier is able to select a suitable type. Due to the great
variety of producers, sizes and types, PETER electronic does not
recommend any particular fuses.
Note 2: If the value of the fuse or cutoff-I²t-value is selected too small, it may happen
that the semiconductor fuse reacts during braking.
Table 2
Fusing according at UL/CSA
Column 1 Column 2 Column 3 Column 4
max. Braking
current /
Nominal/rated
device current
Device type Fuse value
iallocation type „1“
Recommended range for
cutoff-I²t-value of semiconductor
protection fuses allocation type „2“
25A VB …-25 20A 500… 900 A²s
Rated device cur-
rent
Device type Fuse value prescribed fuse
25A VB …-25...UL 25A SIBA aR
Order number 60003305.25

VB 230/400-25 17
13.3 Permissible braking frequency
The braking frequency depends on the adjusted braking current.
Please find below some typical values for braking devices of the VersiBrake type:
For intermediate values please refer to the load curve below.
Warning:
When setting up the machine or during commissioning it is possible to carry
out 10 braking operations in succession with the rated device current at a
braking time of 15s. After these operating conditions, however, the device
needs a recovery time of 20 minutes.
Braking current Braking time Braking frequency
25A 5s
15s
1 braking per 60s
1 braking per 180s
20A 5s
15s
1 braking per 40s
1 braking per 120s
15A 5s
15s
1 braking per 25s
1 braking per 70s
10A 5s
15s
1 braking per 17s
1 braking per 50s
7,5A 5s
15s
1 braking per 10s
1 braking per 28s
Reduction of the permissible max. braking current
in the case of braking times exceeding 20 secound
0
10
20
30
40
50
60
70
80
90
100
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160
Braking time in secounds
Permissible max. braking current in % of the rated device current

18 VB 230/400-25
Table 3
tB = Braking time, Cycle time = Braking time + Non-braking time
14. Dimensions
Alle dimensions indicated in mm.
A B C D E
VB ... - 25 100 73 120 - -
Load curve for VB 230/400-25
0
10
20
30
40
50
60
70
80
90
100
0 102030405060708090100
Cyclic duration factor (c.d.f.) in %
Permissible max. braking current in % of the rated device current
Cyclic duration factor (c.d.f.) tB
Cycle time
100
A C
B
VB 230-25
VB 400-25

VB 230/400-25 19
15. Typical connections
15.1 Connection diagram
Option
Motor
temperature
X14 X15
X6 X5 X8 X7
X13 X12 X11
Fault signalling relay
Interlocking contact
Option
Y
EMERGENCY OFF
OFF
ON K1
K1
Motor
contactor
X3 X4
Start
1L1 3L2 2T1
4T2
6T3
VersiBrake
L1.1 N.1 Control voltage
L1 L2 L3 N PE
K1
M
3
~
K1
F4
F1 F2
F3
X17 X16
Option Standstill signalling relay
Y
The correct terminal-phase connections must be ensured between the braking device input (L1, L2) and the braking device output (T1, T2).
VB 230 - ...
The limit values for emitted according to the applicable device standards do not rule out the possibility that receivers and susceptible electronic devices within a radius af 10m are subjected to interference. If such interference, which is definitely to the operation af the braking devices "VB", occurs, the emitted interference can be reduced taking appropriate measures. Such measures are, e.g.:
To connect reactors (3mH) or a suitable mains filter in series before the braking device, or to connect X-capacitors (0,15μF) in parallel to the supply voltage terminals.
EMC