jost JB10 Series, JB16 Series, JB26 Series, JB40 Series, JB52 Series Operating Manual
JB10/... JB16/... JB26/... JB40/... JB52/...
OPERATING MANUAL for
BRAKE UNITS
(Installation set)
JB
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JB
JÖST GmbH & Co. KG
P.O. Box 1253
D - 48233 Dülmen - Buldern
Tel.: 0 25 90 / 98 - 0
Fax: 0 25 90 / 98 - 101
Telex: 89888
JB10/... JB16/... JB26/... JB40/... JB52/...
OPERATING MANUAL for
BRAKE UNITS
(Installation set)
JB
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1 ELECTRICAL SAFETY
THE JB BRAKE UNIT CARRIES DANGEROUS VOLTAGE WHEN IT
IS CONNECTED TO THE MAINS.
THE JB BRAKE UNIT MUST BE EARTHED BY AN EARTH
CONDUCTOR CONNECTED TO THE PE EARTH TERMINAL OF THE
HEAT SINK.
DANGEROUS VOLTAGE MAY ALSO BE PRESENT EVEN WHEN
THE JB BRAKE UNIT IS SWITCHED OFF.
BEFORE STARTING WORK, CHECK THAT THE JB BRAKE UNIT IS
ISOLATED BY CHECKING THE CONNECTING TERMINALS WITH A
VOLTMETER.
Warning symbols
THE ELECTRICAL INSTALLATION
WORK MUST ONLY BE CARRIED OUT
BY AN AUTHORIZED QUALIFIED
CRAFTSMAN.
For your own safety, please pay particular attention to the
instructions marked with the following symbols:
!
Danger! High voltage
General warning
JB10/... JB16/... JB26/... JB40/... JB52/...
OPERATING MANUAL for
BRAKE UNITS
(Installation set)
JB
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2 NOTES ON EMC LEGISLATION
The CE mark refers to Directive 72/73/EEC (93/68) on low voltage and
to [German] legislation on electromagnetic compatibility (EEC §5.2 9/92).
JB brake units are designed in accordance with standard IEC 947-4-2
for category B public mains and are within the published electromagnetic compatibility (EMC) limits.
The limits for emissions under the European standard do not preclude
interference with receivers within 10 m.
Installation of JB brake units must be carried out by staff trained in EMC.
The JB brake unit meets the requirements of the following standards or
equivalent documents:
1. IEC 947-4-2
2. EN 50081-2
3. EN 50082-2
JB brake units may be used only in "industry" without
further measures.
JB10/... JB16/... JB26/... JB40/... JB52/...
OPERATING MANUAL for
BRAKE UNITS
(Installation set)
JB
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3 TABLE OF CONTENTS
1 ELECTRICAL SAFETY.....................................................................................................................2
2 NOTES O N E MC LEGI S L ATION.............................................................................................................3
3 TABLE OF CONTENTS.............................................................................................................................4
4 PREFACE.....................................................................................................................................................5
5 PURPOSE.....................................................................................................................................................6
6 OPERATING PRINCIPLE.........................................................................................................................6
7 INSTALLATION .........................................................................................................................................7
7.1 CONSTRUCTION ....................................................................................................................................7
7.2 NOTES ON INSTALLATION..................................................................................................................7
8 NOTES ON CONNECTION AND USE.....................................................................................................8
8.1 POSITION OF THE ADJ. ELEMENTS AND COMPONENTS...................................................................8
8.2 CONNECTIONS.......................................................................................................................................8
8.3 ADJUSTMENT ELEMENTS ....................................................................................................................9
8.4 MOTOR CONTROL SYSTEM AND BRAKE UNIT................................................................................9
8.5 OVERHEATING PROTECTION (ONLY JB26/... JB40/... JB52/...)..............................................................9
9 COMMISSIONING .....................................................................................................................................9
9.1 CHECKS BEFORE SWITCHING ON THE MAINS VOLTAGE..............................................................9
9.2 INTERLOCKING TEST WITHOUT BRAKING CURRENT .................................................................10
9.3 SETTING THE BRAKING CURRENT IBR..............................................................................................11
10 MAINTENANCE .......................................................................................................................................11
11 FAULT FINDING......................................................................................................................................12
12 APPENDIX .................................................................................................................................................13
12.1 TECHNICAL DATA...............................................................................................................................13
12.2 TYPE KEY ..............................................................................................................................................15
12.3 DIMENSIONS.........................................................................................................................................15
12.4 LINE REACTOR - ALLOCATION / DIMENSIONS / WEIGHT .....................................................................16
12.5 CONNECTION DIAGRAMM (EXAMPLE FOR 1 MOTOR)........................................................................17
12.6 CONNECTION DIAGRAMM (EXAMPLE FOR 2 MOTORS)......................................................................18
12.7 CONNECTION DIAGRAMM JB10/...E000 (EXAMPLE 2 MOTORS EACH WITH IN <1,5A) .............19
JB10/... JB16/... JB26/... JB40/... JB52/...
OPERATING MANUAL for
BRAKE UNITS
(Installation set)
JB
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4 PREFACE
The information contained in this manual refers exclusively to JB brake
units.
It is essential that you read this manual before installation and
commissioning.
The limits specified in the technical data must be observed when using
the brake unit.
The guarantee for manufacturers' drives/machinery does not cover
defects caused by misuse or incorrect use of the brake unit.
The manual is divided into individual sections in accordance with the
table of contents.
Section 1 "Electrical Safety" and Section 2 "Notes on EMC legislation"
must be read before working with the brake unit.
It is essential that the user familiarieses himself with the manual before
using the drive/equipment or before carrying out adjustment work
specific to the operations.
Please contact the manufacturer directly if you have any questions about
the JB brake unit.
The manufacturer reserves the right to make product changes without
prior notice.
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OPERATING MANUAL for
BRAKE UNITS
(Installation set)
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5 PURPOSE
JB brake units are intended to brake manufacturers' unbalanced motors
or three-phase motors used in conjunction with vibrating machineries.
In conjunction with an existing motor control system, or one to be
installed separately, the JB brake unit is used to shorten the coasting
period of the machine after it is switched off. Generally, machines with
one or two drives can be braked. More than two drives are possible in
special cases.
By virtue of its design, vibrating machinery can generate very high,
undesirable vibrations if motor coasting is unbraked, when passing the
transient frequency. When a JB brake unit is used, the motors can be
braked to a standstill quickly and effectively, so that the undesirable
frequencies are either strongly attenuated, or do not occur at all.
6 OPERATING PRINCIPLE
The JB brake unit operates fully electronically. A thyristor in a phase
controlled system generates an adjustable direct current in conjunction
with the electronic control logic. The control logic ensures that the direct
current does not reach the stator, through a braking contactor, until the
motor has been switched off. Said direct current creates a static
magnetic field, which counters the rotary movement of the rotor.
Automatic detection of standstill ends the braking process.
Stator windings are connected in series through the braking contactor, if
more than one motor is to be braked (see connection diagram in the
appendix).
Operating sequence:
(One motor application; on the basis of the connection diagram in the appendix):
If the brake unit is live from the mains, the LED "P" (mains) will light.
Contact 3/4 is broken and n2/n4 made. When the motor starts,
contactor K2 is locked. The brake unit receives the "motor on" signal
from the motor contactor through connection 6/7. LED "M" (motor on)
thus also lights. Contact n2/n4 (= restart lockout) breaks
simultaneously.
When the motor stops, contactor K2 drops out. The contact at 6/7
breaks. LED "M" goes out. After a short delay, contact 3/4 closes and
LED "B" (braking on) lights. Contactor K1 picks up and the braking
current flows through the motor winding, initiating braking. LED "S"
(standstill display) lights during the braking process until the motor
comes to a standstill. The braking process will be ended, unless the
braking time has been extended with trimming potentiometer "T".
Contact 3/4 breaks, contactor K1 drops out and LED "B" goes out.
Contact n2/n4 is then made again. Only now is it possible to restart the
motor.
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