Peter electronic VB 230-6 L Training manual

electronic
Quality is our Drive.
Braking Devices
VB 230/400-6/25/30L (LP)
Assembly- and Commissioning Instructions

VB230/400-6/25/30L (LP) 1
as per 06/19 1B000.10001
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) 7
7.1 LED indicators 8
7.2 Fault signaling relay (only available with circuit-board version) 8
8. Control inputs and outputs 9
8.1 Control input 9
8.2 Control outputs 10
9. Potentiometers 11
10. Technical data 12
10.1 Environmental conditions 13
11. Commissioning 13
11.1 Mounting instructions 13
11.2 Connection 14
11.3 Parameter settings 14
11.4 Possible fault indications during commissioning 16
12. Dimensioning rules 17
12.1 Dimensioning of braking contactors 17
12.2 Dimensioning of pre-fuses 17
12.3 Permissible braking frequency 19
13. Dimensions 22
14. Typical connections 23
14.1 Connection diagram 23

2 VB230/400-6/25/30L (LP)
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.

VB230/400-6/25/30L (LP) 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 VersBrake…-L (LP) are called
„devices“, however, in the sense of the „law on the safety of equipment“, 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 VB230/400-6/25/30L (LP)
3. General description
The electronic braking devices of the VersiBrake-L-type are available both as a housing version
and as a circuit-board version (LP). They enable non-wearing braking of three-phase
asynchronous motors and mono-phase motors. The braking devices are used for drives that, due
to safety and functional reasons, have to be reliably slowed down. Braking is initiated by
measuring the motor voltage. It is not necessary to connect the motor contactor contact, but this
is possible if double detection (redundant system) is required. An integrated standstill detection
function switches the braking current off after the motor has come to a standstill.
Various fault conditions are indicated via LEDs and, in the case of the circuit-board version, additi-
onally via a fault signalling contact.
Special features
• controlled by microcontroller
• wear-resistant and maintenance-free
• for three-phase asynchronous motors
• for mono-phase motors
• retrofitting into existing plants possible
• no normally closed contact on motor contactor required
• integrated braking contactor
• printed circuit-board version with fault signalling contact
• automatic remanence time optimization
• integrated motor standstill detection
• integrated overload monitoring
• braking current control
• meets trade assoc. requirements for PL = b,
acc. to DIN EN ISO 13849-1
4. Usage to the intended purpose
The devices of the VersiBrake…-L (LP)-series are electrical equipment that is used in industrial
electrical power installations. They are designed for application in machines, in order to slow
down rotating masses on drives with three-phase a.c. motors.
Typical applications
• sawing machines
• centrifuges
• wood working machines
• conveying systems
• textile machines

VB230/400-6/25/30L (LP) 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 230/400-6/25/30L (LP)
Article number: 2B0..., 2B1...
Year of manufacture: 2005
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 VB230/400-6/25/30L (LP)
6. Block diagram
Explanation: The designations for the housing variant are indicated without brackets,
whereas those applicable for the circuit-board version are put into brackets.
Brems-
relais
Controller
(L1)
1L1
(L2)
3L2
2T1
(T1)
4T2
(T2)
6T3
(T3)
X5
X6
(X10)
(X11)
Current detection
(X1)
X3
(X2)
X4
Fault
only available with circuit-board version (LP)
24V
5V
X7
Interlocking

VB230/400-6/25/30L (LP) 7
7. Functional description (see connection diagram)
After the operating voltage on 1L1 (L1) and 3L2 (L2) has been switched on, the main contactor
interlock X5 (X5), X6 (X6) and, in the case of the circuit-board version, the fault signaling contact
(X10), (X11) closes. The motor can be started.
A starting logic makes sure that, when switching the plant on with the master switch while the
motor is still switched off, braking is not initiated.
The fully automatic run of the braking interval starts when a drop of the motor voltage is detected
on the terminals 2T1 (T1), 4T2 (T2) and 6T3 (T3). During braking, the main contactor is inter-
locked via the contact X5 (X5), X6 (X6). After a delay time which, dependent on the amount of the
remanent voltage of the motor, optimizes itself, the integrated braking relay pulls in. After the
contact bounce time has been waited out, a controlled d.c. current is fed into the motor winding.
The magnetic field resulting from this has a braking effect on the still rotating rotor. The d.c.
current is generated by a thyristor phase control. Special suppressor circuits protect the power
semiconductors against overvoltage. With the potentiometer I (P2), the braking current (and thus
the braking torque) can be adjusted within a range of 10 … 100% of the rated device current. The
integrated motor standstill detection, which, if the 6T3 (T3)-terminal is connected, functions via
the amount of the remanent voltage and, if the 6T3 (T3)-terminal is not connected, via the brake
current waveform, switches the braking current off approx. 1.5s after a motor standstill has been
detected. To be able to adapt the device to a variety of motors, it is possible to adjust the stand-
still threshold via the potentiometer n0 (P1).
Faults, that occur during braking, are indicated via a signaling light (LED), and, in the case of the
circuit-board version, additionally via a fault signaling output (X10), (X11).
If more safety (redundant system) is required for initiating braking, it is possible to additionally
connect a normally closed contact of the motor contactor to the terminals X3 (X1), X4 (X2). Then,
braking will be initiated by two processes which are independent of each other.
Warning:
To ensure a reliable standstill detection function, it is necessary to comply
with the following:The braking current must not exceed (3) three times the
amount of the rated motor current. The VB …-L (LP) must be operated with
the 6T3 (T3)-terminal being connected for feedback.
If the VB-L is operated without the 6T3 (T3)-terminal beeing connected,
which always applies in the case of single-phase applications, it is to be
ensured that braking current flows at least for a period of 1.5 s before the
motor comes to a standstill, as no motor standstill is detected within this
period of 1.5s and the braking current would then flow over the total
maximum braking time. This could cause destruction of the motor and fault
indications of the braking device.
Note: If the braking time at rated device current is too short, due to the fact that the
centrifugal masses to be slowed down are too large, either a device with a
longer braking time can be inquired of the producer or a device featuring a
higher rated current has to be used.

8 VB230/400-6/25/30L (LP)
7.1 LED indicators
7.2 Fault signaling relay (only available with circuit-board version)
The following states on the fault signaling contact (X10), (X11) are possible:
LED – ready (V9)
- Illuminated
- Flashing 1xa
- Flashing 2xa
- Flashing 3xa
- Flashing 5xa
a. ... repeated with a short pause
Operational status
- Mains voltage is applied, braking device is ready
- No motor standstill detected
during max. braking time
- Adjusted braking current was not reached
- Braking frequency too high
- 3x in succession no motor stillstand detected
LED – I (V16)
- Illuminated
Operational status
- Braking current is flowing
No voltage applied to VB-L Contakt (X10), (X11) open
Voltage applied to VB-L, no fault Contakt (X10), (X11) closed
No standstill during the max.braking time Contakt (X10), (X11) opena
a. Fault is reset when restarting the motor (voltage on T1, T2, T3).
Adjusted braking current was not reached Contakt (X10), (X11) opena
Braking frequency too high Contakt (X10), (X11) openb
b. Fault is reset by shortly disconnecting (5s) the mains voltage on L1, L2.
3x no standstill during monitoring time Contakt (X10), (X11) openb

VB230/400-6/25/30L (LP) 9
8. Control inputs and outputs
8.1 Control input
Information on operation without connected starting contact:
The braking delay time (remanence time) may prolong itself by up to 50%.
The interlocking relay does not open immediately after the motor contactor has dropped out, but
only shortly before the braking relay closes. In contrast to an operation with connected starting
contact this means that the motor can be restarted during the braking delay time (remanence
time).
Caution: Danger to life through electric shock!
The terminals X3 (X1), X4 (X2) carry mains potential; when laying the
connecting lines, be sure to provide protection against accidental contact.
Control terminals Designation Description
X3 (X1), X4 (X2) Starting contact Connection of a normally closed contact of the motor
contactor.
In standard applications not required.
Connection is only required, if more safety is required
(redundant system) to initiate braking.

10 VB230/400-6/25/30L (LP)
8.2 Control outputs
Behavior of the changeover contact on X5, X6, X7
Control
terminals
Designation Description
X5 (X5), X6 (X6),
X7 (X7)
Interlock (potential-
free changeover
contact, common
contact on X5)
During braking, the contact between X5 and X6 is
open. This contact is to be looped into the control
circuit of the motor contactor. Therefore, the motor
cannot be started during braking.
The contact between X5 and X7 is closed during
braking. Thus, it is, e.g. in the case of star-delta-
connections, possible during braking to control the
star contactor in order to interconnect the motor
winding.
For more detailed information, please see connection
diagram on page 20.
(X10), (X11) Fault signal
(potential-free
relay contact)
In case of a fault this concact opens. For closer
details on the tripping characteristics please see
chapter 5.2., page 7.
This contact is only available with the circuit-board
version.
Status Interlocking contact
X5 – X6
Star contactor
contact X5 – X7
Reset by
Motor off closed open
Motor is running closed open
Motor is being
decelerated
open closed
Braking correctly
finished
closed open
Braking frequency
too high
open
S02, S05 closed
closed
S02, S05 open
short disconnection
from mains (5s)
3x no standstill
during
max. braking time
open
S02, S04 closed
closed
S02, S04 open
short disconnection
from mains (5s)

VB230/400-6/25/30L (LP) 11
9. Potentiometers
With the potentiometers it is possible to adjust the following parameters. The designations for the
circuit-board version (LP) are indicated in brackets ().
Warning:
The setting of the n0 potentiometer is only permitted in operating mode
"Standby". Adjusting the n0 potentiometer while the motor is running (motor
contactor closed) or when the VersiBrake-L is in "Braking" mode may cause
a safety critical condition.
Note! If the potentiometer is adjusted to a position too far in clockwise or counter-
clockwise direction (e.g., end stop position), it may happen that no standstills
are detected. In this case, braking current flows until the end of the max.
braking time. The LED indicates „no standstill during the max. braking time“.
„I“, „(P2)“ Adjusting the braking current.
The braking current can be adjusted in the range from approx. 10% - 100% of the
rated device current. The adjustment is roughly linear.
„n0“, „(P1)“ Adapting the standstill threshold and braking behavior at motor standstill.
In a setting range of 20% - 100%, this potentiometer can be used to adapt the motor
standstill threshold to various motor types and applications, and to influence the
behavior of the braking current at motor standstill.
If the n0 potentiometer is set to less than 20%, the braking current generally flows
until the end of the max. braking time. The fault "no standstill during the maximum
braking time" is signaled .
The potentiometer has to be adjusted so that the braking current is switched off
approx. 1-1,5s after the motor has come to a standstill.
Factory-setting: approx. 40%.

12 VB230/400-6/25/30L (LP)
10. Technical data
Type designation VB 230-6
L (LP)
VB 230-
25 L (LP)
VB 230-
30 L (LP)
VB 400-6
L (LP)
VB 400-
25 L (LP)
VB 400-
30 L (LP)
Mains voltage
according to DIN EN
50160 (IEC 38)
220/240V ±10% 50/60Hz 380/415V ±10% 50/60Hz
Power draw of electro-
nics 3 VA
Recommended for
rated motor currents
0.3...3A 2...12.5A 2...15A 0.3...3A 2...12.5A 2...15A
Recommended for
rated motor currents
on IE3 Motors
0.3...2A 2...9A 2...12A 0.3...2A 2...9A 2...12A
Rated device current 6A 25A 30A 6A 25A 30A
c.d.f. at max. braking
current 60% 8% 5% 60% 8% 5%
I²t -value of power
semiconductors 310 A²s 1250 A²s 1350 A²s 310 A²s 1250 A²s 1350 A²s
Braking voltage 0 ... 110VDC 0 ... 220VDC
max. Braking time 12s
Contact rating of out-
put relays 3A/250V AC 3A/24VDC
Delay time for reduc-
tion of residual e.m.f. self-optimizing 0.2 ... 2s
max. Cross-sectional
area for connection
- Enclosed version (w.
housing):
- Circuit-board ver-
sion:
2 x 2.5mm² per terminal
FASTON connector 6.3 x 0.8mm

VB230/400-6/25/30L (LP) 13
10.1 Environmental 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.
11. Commissioning
The device is to be put into operation in 3 steps:
1. Mounting
2. Connection and
3. Parameter setting
11.1 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…-L (LP).
1. The device series VersiBrake…-L (LP) 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..
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.
Storage temperature -25 ... 75°C
Operating temperature 0 ... 45°C
Degree of protection
- Enclosed version (w. housing):
- Circuit-board version:
IP 20
IP 00
Environment Overvoltage category III, pollution degree 2
Weight
- Enclosed version (w. housing):
- Circuit-board version:
0.6kg
0.25kg

14 VB230/400-6/25/30L (LP)
11.2 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 is to be checked.
To ensure reliable function is it necessary to comply with the interlocking conditions:
The interlocking contact of the braking device, terminal X5 (X5), X6 (X6), has to be looped into the
control circuit of the motor contactor, in order to prevent the motor contactor from pulling in during
braking.
11.3 Parameter settings
Sequence of steps during commissioning:
(the designations/details indicated in brackets refer to the circuit-board version)
1. Disconnect the plant/system from the supply mains.
2. Adjust the requested braking current with the potentiometer „I“, „(P2)“.
Since the potentiometer reacts roughly linear, it is possible to infer the braking current from
the potentiometer setting.
Left stop (counter-clockwise direction) roughly equals 10% of the rated device current.
Mid-position roughly equals 50% of the rated device current.
Right stop (clockwise direction) equals 100% of the rated device current.
3. Adjust potentiometer „n0“, „(P1)“ to approx. 40%.
4. Switch on the plant.
5. Initiate braking by switching the motor ON/OFF.
Note: When putting the device into operation for the first time, the braking current
can be checked with a true r.m.s. measuring instrument.
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 motor. This is especially important in the
case of high switching frequencies. We recommend to limit the max. braking current to 2.5 times
the rated motor current.
The requested braking torque can be adjusted with the potentiometer „I“, „(P2)".
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

VB230/400-6/25/30L (LP) 15
Adjusting the braking time
No adjustments are required, since the braking current is automatically switched off approx. 1.5s
after a motor standstill has been detected.
If no standstill is detected during the max. braking time (10s in the case of standard devices), the
braking current is switched off when this time is over. This case is indicated by the LED „ready“,
„(V9)“ (flashing 1x).
Adjusting the standstill threshold
In most applications, the factory-setting (40%) produces good results.
If the braking current is switched off before the motor has come to a rest, or if the braking current
is not switched off approx. 1.5s after the motor has come to a rest, it is possible to make an
adjustment with this potentiometer. Turn to the left --> Detection becomes more sensitive (Brake
current may switch off too soon). Turn to the right --> Detection becomes less sensitive (Braking
current may not switch off when the motor is stopped. The optimum setting has to be found by
carrying out several braking operations. The potentiometer should be changed only in little steps
(10%). For a more detailed functional description please refer to page 9.
Warning:
If the 6T3-terminal is not connected, the motor has to be supplied with
current for a period of at least 1.5s prior to the standstill. During this period of
1.5s no motor standstill is detected. The braking current then flows until the
maximum braking time has elapsed. If this is the case, the braking current
has to be adjusted to a slightly lower value.

16 VB230/400-6/25/30L (LP)
11.4 Possible fault indications during commissioning
During commissioning, and in normal operation too, fault indications can occur. The following
explanation is to give you assistance in the localization and correction of faults.
Note: All data sheets and commissioning instructions are available via our
homepage at www.peter-electronic.com.
Fault
indication on
LED „Ready“,
„(V9)“
Fault Possible cause Fault correction
Flashing 1x No motor standstill
during max. braking
time
Braking current adjusted to a
too small value.
Adjust braking current to a
higher value.
Too large centrifugal mass. Use a braking device with
longer max. braking time or
higher rated device current.
Terminal „6T3“ „(T3)“ is not
connected and the motor is not
suplied with current for a period
of 1,5s prior to the standstill.
If possible, connect 6T3 (T3) or
adjust the braking current to a
slightly lower value.
Standstill threshold is not
adapted.
Adapt standstill threshold with
„n0“.
Flashing 2x Adjusted braking
current was not
reached.
Interruption in the braking
circuit. Possibly the motor is
started with star-delta
connection.
Check circuit. Possibly the star
contactor has to be closed
during braking.
The resistance of the motor
winding is too high for the
adjusted braking current.
Turn braking current back so
that the fault does not occur
any more.
Flashing 3x Braking device is
overloaded.
Braking frequency is
too high.
The specified max. braking
frequency is exceeded.
Reduce braking current or
braking frequency.
During commissioning,
4 braking operations in
succession can be initiated
without an overload being
indicated.
Flashing 5x 3x in succession no
standstill detected
Braking current adjusted to a
too small value.
Adjust braking current to higher
value.
Centrifugal mass is too large. Use braking device with longer
max. braking time or higher
rated device current.
Cable „6T3“ „(T3)“ is not
connected.
Connect or check cable.
Standstill threshold is not
adapted.
Adapt standstill threshold with
„n0“.
See “Potentiometers” on
page 11.

VB230/400-6/25/30L (LP) 17
12. Dimensioning rules
Note! All data sheets and commissioning instructions are avaialble on our
homepage at www.peter-electronic.com.
12.1 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.
12.2 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 applying again mains voltage to the
device. 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
• 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.
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 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.

18 VB230/400-6/25/30L (LP)
Fusing according to allocation type „2“:
The power semiconductors are to be protected by fuses of the utilization category gR (semicon-
ductor 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).
As for the dimensioning of the line protection fuse (gL), please refer to table 2, column 3.
To protect the semiconductors it is necessary to select gR-fuses featuring cutoff-I²t-values of the
ranges indicated in table 2, column 4. In this connection, the fuse rating of the selected fuse
should not be smaller than the braking current to be expected (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 fuse or cutoff-I²t-value is selected too small, it may happen that the
semiconductor fuse reacts during braking.
Table 2
Column 1 Column 2 Column 3 Column 4
max. Braking
current / Rated
device current
Device type Fuse value
in the case of
allocation type 1
Recommended range for
cutoff-I²t-value of semiconductor
protection fuses in the case of
allocation type „2“
6A VB …-6L
(LP)
6A 150… 250 A²s
25A VB …-25L
(LP)
20A 500… 900 A²s
30A VB …-30L
(LP)
25A 600… 900 A²s

VB230/400-6/25/30L (LP) 19
12.3 Permissible braking frequency
The braking frequency depends on the adjusted braking current.
The braking devices of the VB …-25 L (LP) type allow the following braking frequencies:
For intermediate values please refer to table 3.
Warning:
When setting up a machine or during commissioning, it is possible to carry
out 4 braking operations in succession, i.e., with rated device current and at
a braking time of 10s. After such operating conditions, however, the device
needs a recovery time of 15 minutes.
Braking current Braking time Braking frequency
VB ...-6 L 6A 5s
10s
1 braking operation per 8s
1 braking operation per 16s
VB ...-6 L 3A 5s
10s
1 braking operation per 5s
1 braking operation per 10s
VB ...-30 L 30 5s
10s
1 braking operation per 90s
1 braking operation per 180s
VB ...-25,30 L 25A 5s
10s
1 braking operation per 60s
1 braking operation per 120s
VB ...-25,30 L 20A 5s
10s
1 braking operation per 40s
1 braking operation per 80s
VB ...-25,30 L 15A 5s
10s
1 braking operation per 25s
1 braking operation per 50s
VB ...-25,30 L 10A 5s
10s
1 braking operation per 17s
1 braking operation per 35s