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Electronic DC braking, suitable for all asynchronous motors, especially suitable for retrofitting into existing plants, extending the life of drive units by infinitely variable braking torque, wear-resistant and maintenance-free
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¨ Rapid braking of three-phase induction motors fed by frequency inverters without an integrated braking chopper
¨ Elimination of production stops due to unwanted inverter tripping caused by overvoltage in the DC link
Applications
Braking of three-phase drives fed from frequency inverters,
in particular:
¨ Drives with a large inertia, e.g. large fans, centrifuges
¨ Drives with requirement for rapid braking, e.g. saws, planing and milling machines
¨ Drives for transport, long travel and hoisting applications
¨ Retrofit to existing inverters without a braking chopper e.g. to avoid nuisance tripping with link overvoltage.
¨ Often a price advantage compared to braking choppers of original inverter manufacturer
Features
¨ Compatible with all frequency inverters with a DC voltage link operating at input voltages up to 3 AC 690 V
¨ Simple wiring without control voltage - only two cables to the DC link required
¨ Integrated braking resistor with TRANSOMIK B
¨ External braking resistors with overtemperature protection (OPTION BR) with TRANSOMIK BC
¨ Adjustable brake threshold-voltage;
- TRANSOMIK B: • Factory adjustable
- TRANSOMIK BC: • Switchable preset values
¨ TRANSOMIK BC is especially suitable for quasi- continuous braking duty (e.g. heavy-duty braking for crane drives)
¨ Special monitoring functions with TRANSOMIK BC:
- Heat sink overtemperature trip
- Additional with TRANSOMIK BC2:
- Monitoring LED's
• Electronic overload-monitoring of brake resistor
• Fault latch with relay output
¨ TRANSOMIK BC2 can be paralleled for higher braking powers
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PETER electronic has added the compact type series VersiBrake 230/400-25 L (LP) to its tried and tested product line of electronic DC brakes. The device, which features an upgraded power section designed for a rated device current of 25 A, is available either as a housing version or as a circuit-board version for rated motor currents up to 12.5 A. In preparation for the certification by the German Trade Association (Technical Committee for Wood), VersiBrake 230/400-25L (LP) already now meets the association's requirements for category 2 acc. to EN 954-1. VersiBrake 230/400-25 L (LP) features double safety protection: i.e., control via motor contactor and motor voltage detection. In addition, a surge suppressor circuit and a braking current infinitely variable between 0 and the rated device current reduces the failure probability of the braking device and thus indirectly that of the machines, too. An integrated overload monitoring function, which, if the braking frequency is too high, prevents motor restart, provides safety both for the VersiBrake and the operator. The integrated and adaptable motor standstill detection gives the user flexibility with regard to the motor types available.
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These expansion modules fits into the integrated ac servo motors MAC50, MAC95, MAC140, MAC141 and MAC750 to adapt the motor to a specific application. This is a cost-saving approach as you only pay for what you need.
The unique module concept:
There are now modules for:
• Profibus-DP
• CANopen DS301/402
• Devicenet
• Nano PLC
• High speed 230kbit serial
RS485
•Wireless Bluetooth and WLAN
With D-sub connectors, cable glands or M12 connectors.
Modules can also be developed to customer specifications.
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MCM - Motor Condition Monitor
MCM Motor Condition Monitor is a device that can be used for monitoring of 3 phase electric motors and motor-based machinery and equipment used in industrial processes, especially where motor failure can cause critical damage to the process.
It is a software and hardware-based product, operating on unique model-based monitoring technology, that has the ability to detect impending mechanical and electrical failures such as unbalance, misalignment, bearing and rotor faults, static and dynamic eccentricity, core damage, leakages, valve and vane misadjustments, stator isolation problem,... on the motor or motor driven process. Therefore it helps preventing unexpected failures to occur, planning and scheduling maintenance work, lowering maintenance costs and enables to run equipment with high productivity and performance levels.
Features:
- Early and accurate alarms
- Continuous monitoring and maintenance scheduling
- Standard current and voltage transformers can be used
as sensors
- The degree of fault is presented on simple sliding scale
by LEDs
- Detecting both electrical and mechanical fault by single
device
- There are no external or background effects that can
interfere MCM capability to monitor
- Ideal solution for inaccessible motors
- Measurement of I, U, PF, PA, P, f, THD...
- Phase order indication
- RS485 or RS422 communication via MODBUS protocol
- Easy integration in to specially designed MCMSCADA system
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Hall-effect sensors
Hall-effect sensors are suitable for proximity rotational speed recording on gears with a small module and high resolution. The various models can be used in a wide range of applications, even under extreme conditions. SH type rotational speed sensors are used in a wide variety of applications in mechanical engineering, vehicles and mobile working machines, as well as in hydraulic drives.
The sensor detects the movement of ferromagnetic structures such as gears using the change in the magnetic flux. The sensor is biased using a permanent magnet. Teeth and gaps which moves past the sensor affect the magnetic field in different ways. This changes the Hall voltage on a hall-effect sensor.
This means the changes to the magnetic field can be converted to electrical values, and then filtered and processed. The output signal of the sensor is a square wave voltage which reflects the change in the magnetic field.
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U/min, m/sec, m/min, m
•Measurement of rpm (non-contact and mechanical), speeds and lengths
•Storage of mean/min./max. values, last reading
•Battery check “Low Batt”
•Robust design with SoftCase (protective cover)
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DZ 210: Simple Monitor for Standstill and Direction of Rotation
Simple monitor for control of clockwise or
anti-clockwise rotation and standstill
Versatile impulse inputs for operation with all common
incremental encoders and sensors
High maximum input frequency (500 kHz) and very fast
response time (1 kHz)
Two output relays (dry change-over) and
two fast-responding transistor outputs
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The DSW3 type speed and standstill monitor can be used in apllications requiring monitoring of rotational movements.
The fully digital and microprocessor controlled device monitors rotational speed pulses and signals a fault via 1 of 2 floating change over contacts.
Using a 4 digit LED display the user can set 7 parameters e.g. upper and upper and lower pulse limit values, the time between starting after powering-up and measurement start.
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ROSTA engine jack MT 27
ROSTA engine jack MT 38
ROSTA engine jack MT 50
ROSTA engine jack MT 70
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Accessories for electric motors
