DE202006006713U1 - Vacuum contactor used e.g. as motor starter, incorporates all components associated with switching point control and motor protection in front head end of unit - Google Patents

Abstract

Components for electronic control, i.e. of switching point- and motor protection management, which ensure long operational life, are gathered together and installed within the casing. The signal detection and analysis systems for these functions, employ similar algorithms and hardware. Electronic control of the protection, operating components and connections are all integrated into the front head-end of the unit.

Description

The The invention relates to a power contactor, in particular vacuum contactor, the together with electronic sensor, evaluation and control electronics has a compact design.

• 1. Grundfunktion Schalten – Sichere Durchleitung hoher Energieströme für elektromotorische Verbraucher, – sehr häufiges Schalten hoher Energieströme; sehr hohe elektrische Lebensdauern, – Sicherung einer dauerhaften Zuverlässigkeit der erforderlichen Funktionen und Handlungen, – minimale Verluste bei der Durchleitung hoher Energieströme, – Sicherheit gegen Umwelteinflüsse, – Magnetantriebs- und Schaltmanagement zur optimalen Materialausnutzung. Einzelerzeugnisse für diesen Komplex sind: Leistungsschalter, Leistungs-(Motor-)schütze.
• 2. Zusatzfunktion Anlagen-Schutz – Erfassung von Betriebszuständen im Energiestrom; Sensorik, – Erfassung von nicht betriebsmäßigen (fehlerhaften) Zuständen im Energiestrom; Sensorik, – Umwandlung der physikalischen Messgrößen in nutzbare Signale, – Verarbeitung und Auswertung der Signale, – Organisation der Handlungen, Auslösung von Schalthandlungen in Leistungsgeräten zum Schutz der elektrischen Anlage, – Systemkommunikation über Fernleitung mit zentralen Kommandosteilen und zwischen den Komponenten, – Parametrierung der Signalerfassung und Signalausgabe nach Kundenwunsch.

The prior art can be described as follows:
The most important functions for switching devices in the field of motor outlets in electrical installations are:

• 1. Basic function switching - safe transmission of high energy flows for electromotive consumers, - very frequent switching of high energy flows; very high electrical lives, - ensuring lasting reliability of the required functions and actions, - minimal losses in the passage of high energy flows, - environmental protection, - magnetic drive and switch management for optimal material utilization. Individual products for this complex are: circuit breakers, power (motor) contactors.
• 2. Additional function plant protection - recording of operating states in the energy flow; Sensor technology, - detection of non-operational (faulty) states in the energy flow; Sensor technology, - conversion of the physical measured variables into usable signals, - processing and evaluation of the signals, - organization of the actions, triggering of switching operations in power devices to protect the electrical system, - system communication via remote line with central command sections and between the components, - parameterization of the signal acquisition and signal output according to customer requirements.

Single products For this Complex are: current sensors, converters, electro-mechanical overload relays, Bimetallic relays, electronic overload relays, motor protection switches, Motor starters, undervoltage relays, phase failure relays, phase balancing relays, Earth-Fault.

• – Elektromechanischer Kompakt-Motor-Abgang Leistungsschalter, Schütz, Motorschutzrelais als Kombination separater Komponenten in einem Gehäuse,
• – Elektromechanischer Kompakt-Motor-Abgang Leistungsschalter, Schütz, Motorschutzrelais als integriertes Design in einem Gehäuse,
• – Elektronischer Motorschutz Separates elektronisches Motorschutzrelais kombinierbar mit Schütz; Sensorik und Elektronik kann dem Schütz beigestellt werden,
• – Schützkombinationen, Starter, Stern-Dreieck-Starter Schütz und Steuerrelais, Motorschutzrelais Kombination separater Komponenten auf einer Montageplatine oder in einem Gehäuse,
• – Elektronisches Magnetmanagement Elektronisches Steuermodul zum energiearmen, optimalen Magnetmanagement,
• – Elektronisches Schaltpunktmanagement Elektronisches Steuermodul zum optimalen Management des Schaltzeitpunktes; damit fassen sich außerordentlich hohe elektrische Lebensdauern erreichen.

The following partial solutions from the mentioned complexes 1 and 2 are known in a separate construction:
Based on the intention of several manufacturers to install several functions in a compact unit, it was possible to assemble discrete switching devices on mounting boards or in additional housings.

• - Electromechanical compact motor output circuit breaker, contactor, motor protection relay as a combination of separate components in a housing,
• - Electromechanical compact motor output circuit breaker, contactor, motor protection relay as integrated design in a housing,
• - Electronic motor protection Separate electronic motor protection relay combinable with contactor; Sensors and electronics can be provided to the contactor,
• - contactor combinations, starters, star-delta starters contactor and control relays, motor protection relay combination of separate components on a mounting board or in a housing,
• - Electronic magnetic management Electronic control module for low-energy, optimal magnetic management,
• - Electronic switching point management Electronic control module for optimal management of the switching time; This means that extraordinarily high electrical lives can be achieved.

These solutions were the first attempt, the customer a finished switchgear assembly to be installed with little effort in the system can.

As an an example:
Compact motor starter, MSE system, 4kW, by Klöckner-Moeller, 1990:
Electromechanical compact motor output (starter) as a combination of separate components on a mounting plate or in a box housing: circuit breaker, contactor, motor protection relay.

Of the next Step was the union of several functions in one extra constructed housing construction.

As an an example:
Self-Protected Starter, System PKZ 2, 42 A, by Klöckner-Moeller, 1990:
Electromechanical compact motor output (starter) as integrated design in one housing: Disconnector, circuit breaker, contactor, motor protection relay.

Of the next Step was the development of electronic components for capture and for signaling faults in the electrical network. In the Combination with modern sensor components was thus extraordinarily diverse solutions for the Detection of errors and triggering of safety reactions (Switching operations) in further required high-performance switching devices.

The electronic systems and the switching devices are physically still separated. Also, these switching devices are limited in their life. There is a discrepancy in the life between the electronic protection relay and the sensors on one side and the contactor on the other side.

As an an example:
Electronic motor protection system ZEV, 620 A, by Moeller, 1999:
Electronic motor protection as a separate electronic motor protection relay:
combinable with contactor. Sensors and electronics can be provided to the contactor.

When The latest development is intelligent, electronic control the contactor drive, so that the switching operations always take place in the best possible time.

As an an example:
EVSi (2), 320 A, by EAW-Relaistechnik GmbH, 2006:
Contactor with electronic switching point management module:
Switch point control for long-term stable switching of operational currents.

outgoing The prior art was based on the object of the invention various functions that were previously outside a contactor, with in contactors, especially vacuum contactors, to integrate as a compact design.

The solution the task is carried out according to the features of claim 1.

The under claims give appropriate measures to completion the inventive solution at.

the Aim for more compact construction comes the last development the merger of Functions contrary. For example, in the device series EVSi (3) of EAW-Relaistechnik GmbH a merger of the Functions electronic switch point management and electronic engine protection management in a contactor provided that the signal acquisition and evaluation for both similar to the above functions Algorithms and a similar one Use hardware.

According to the present Invention are the components for the electronic control of the contactor, i. for the functions electronic switching point management for a very long life and electronic motor protection management, within the housing area of the contactor summarized and installed.

In expedient manner The electronic control of the contactor is integrated in the front head section of the contactor and are the operating and connection elements of the contactor in the front head part of the contactor arranged.

The in the figure illustrated embodiment relates to the developed by the company EAW-Relaistechnik GmbH vacuum contactor EVSi (3) from 100A to 300A, within the housing dimensions an extensive sensor and control electronics is integrated.

The Measurements of the sensors are made in three channels of the input part of the electronic module and used in the subsequent processing and evaluation unit analyzed. The comparison with specified setpoints (Parameter values) leads to a rating.

From greater Importance is the realization of a high signal quality. Disturbing influences from external fields have to be avoided and eliminated. In the cramped installation conditions at the contactor special efforts are required in the design.

in the Warning case is a visual error message.

in the In case of danger, the switch-off signal is forwarded to the magnetic drive. This is in the execution of the "high end "MOT-Modules also a synchronization of the switching action of the reference phase performed to the phase angle of the network. The magnet switches intelligently controlled so that the occurring arc energy their minimum value Has.

With But help of the 3-phase sensors can also outside the protection functions are actively controlled by other current-dependent processes become.

Claims (4)

Power contactor, in particular vacuum contactor, characterized in that the components for the electronic control of the contactor, ie for the functions electronic switching point management for a very long life and electronic motor protection management, are summarized and installed within the housing area of the contactor. contactor according to claim 1, characterized in that the signal detection and evaluation for the functions electronic switching point management for a very long life and electronic engine protection management similar algorithms and a similar Use hardware. Power contactor according to one of Claims 1 or 2, characterized in that the electronic control of the contactor is integrated in the front head part of the contactor. contactor according to one of the claims 1 to 3, characterized in that the operating and connection elements of the contactor in the front head part of the contactor are arranged.