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Electrical contactors are electromechanical devices used to control the flow of electricity in a circuit. They are commonly used in industrial and commercial applications to switch electrical loads on and off, such as motors, lighting, and heating systems. Here are some key points about electrical contactors: Components of a Contactor 1. Coil: The coil is an electromagnetic component that, when energized, creates a magnetic field to close the contacts. 2. Contacts: These are the conductive parts that open or close the circuit. They can be normally open (NO) or normally closed (NC). 3. Frame: The structure that houses the coil and contacts. 4. Auxiliary Contacts: Additional contacts that can be used for signaling or interlocking purposes. ypes of Contactors 1. AC Contactors: Designed for alternating current applications, typically used in motor control and lighting circuits. 2. DC Contactors: Designed for direct current applications, often used in battery systems and electric vehicles. 3. Magnetic Contactors: Use electromagnetic force to operate the contacts. 4. Solid-State Contactors: Use semiconductor devices to switch loads without moving parts, providing faster switching and longer life. Working Principle When a voltage is applied to the coil, it generates a magnetic field that pulls the armature, closing the contacts and allowing current to flow through the load. When the voltage is removed, the magnetic field collapses, and the contacts open, stopping the current flow. Applications - Motor Control: Starting and stopping electric motors. - Lighting Control: Switching on and off lighting circuits. - Heating Systems: Controlling electric heaters or HVAC systems. - Automation Systems: Used in conjunction with relays and timers in automated processes. Selection Criteria When selecting a contactor, consider the following factors: - Voltage and Current Ratings: Ensure the contactor can handle the load's voltage and current. - Number of Poles: Choose based on the number of phases in the circuit (single-phase or three-phase). - Type of Load: Consider whether the load is resistive, inductive, or capacitive. - Control Voltage: The voltage required to energize the coil. - Environmental Conditions: Consider factors like temperature, humidity, and exposure to dust or chemicals. ### Maintenance Regular maintenance is essential for ensuring the reliability and longevity of contactors. This may include: - Inspecting for wear and tear. - Checking for proper operation of the coil and contacts. - Cleaning contacts to prevent arcing and pitting. ### Safety Considerations - Always ensure that the contactor is rated for the specific application. - Follow proper electrical safety protocols when installing or servicing contactors. - Use appropriate protective devices, such as fuses or circuit breakers, to prevent overloads. Electrical contactors play a crucial role in controlling electrical systems, and understanding their operation and application is essential for anyone working in electrical engineering or maintenance.
Electrical contactors Κατασκευαστές
Μονάδα σύνδεσης XSL 511 CE Θωράκιση LON 3 Θωράκιση LON Fusht Honeywell AG Made in Germany
Honeywell - Connector Module XSL 511 CE LON shield 3 LON shield
S_Bin: PO Bin: D0806D UOM: EA SB95204 FORM 275 Old No: Desc: TRANSMIT MPN: 2333010030 TAIDICATOR, PRESSURE, 0, 30, MFG: PO Bin: D1 O Bin: Bin: Bin: S_Bin: D15 PN: MPN: Desc: esc: D1502A UOM EA SB95204 Old No: FORM 275 2333010030 TRANSMITTER, INDICATOR, PRESSURE, 0, 30, MFG: 233301003v TRANSMITTER, INDICATOR,Messgeräte le with care The Messgate dl are
WIKA Alexander Wiegand SE & Co. KG - D1502A
2 Al, 4-20mA, HART, Series 2 LocalBus Power Rating 12VDC, 150mA Bussed Field Power Rating 24VDC, 300mA Field Circuit Rating Ambient Temperature 24VDC, 30mA -40 to 70°C SCB B 2P2 EMERSON Process Management 4-WIRE I 4-Wire I Terminationl I Odd#> T1 Even# I 24 VDC Bussed Field Power Carrier + Al Card Standard Term. I 2-WIRE 24 VDC Bussed Field Power Carrier + I Al Card Odd# Current Limit A/D Conv. Στ...
Rosemount Analytical / Emerson - 4-WIRE I
BE DO, 24 VDC, απομονωμένο Βαθμολογία ισχύος τοπικού διαύλου Βαθμολογία ισχύος διαύλου πεδίου Βαθμολογία κυκλώματος πεδίου Θερμοκρασία περιβάλλοντος 12 VDC, 45 mA Κανένα 60 VDC, 1 A/Ch. 0 έως 60°C Σύστημα EMERSON. Μοναδιαίο 23 Προαιρετική ασφάλεια Φορτίο τροφοδοσίας συνεχούς ρεύματος Μοναδιαίο FM APPROVED CL. I Div. 2 GP.A,B,C,D HAZ.LOC. TEMP. Rating T5 Βλέπε εγχειρίδιο για πλήρεις προδιαγραφές Ex...
Rosemount Analytical / Emerson - EEx IIC T4
CE0518 Ex Διακόπτης Τύπος Serial No. ASHCROFT R SNAP ACTION SWITCH 111 GD T85 °C IP6X EEx ia IIC T4 T: -20 °C...60 °C Μην ανοίγετε όταν υπάρχει εκρηκτική ατμόσφαιρα αερίου/σκόνης D-7-31-8-CEN4-07 050800386 SIRA 04 ATEX 2081 Εύρος Proof 2 BAR El. rating U₁ = 30 V = 100 mA DRESSER. struments Deadband 14-0,34 manufactured by/hergestellt von DRESSER EUROPE GmbH 52499 Baesweiler, Germany
Ashcroft - ASHCROFT R SNAP ACTION SWITCH
SIEMENS Εξαερισμός χώρου μετασχηματιστή Τύπος μετασχηματιστή Φαινόμενη ισχύς [KVA] Ονομαστική τάση OS [KV] Ονομαστική τάση US [KV] Ελ. τάση βραχυκύκλωσης [%] GEAFOL Neo Απώλειες μειωμένες 630 Ομάδα διανυσμάτων Dyn5 20 Απώλειες ανοικτού κυκλώματος μετασχηματιστή PO [W] 1.350 0,4 Απώλειες βραχυκύκλωσης μετασχηματιστή PK120 [W] 7.700 4 Συνολικές απώλειες μετασχηματιστή QV [W] 9.820 Ύψος χώρου Εγκατεσ...
Siemens - GEAFOL Neo 630KVA
M EHENDRESS+HAUSER LIQUIPHANT M IP66/1P67/NEMA 4X Κωδικός παραγγελίας: FTL51- BAE2BB4G5C 660 Σημείο διακοπής: 647 mm mm Ser.-No.: 7506D701027 10129881/000230 000 000 113G EExn C II T6 Il 3D T85°C AXA182F-B Made in Germany 79889 Maulburg CE Z-85.11-230 05.05 D01487-A
Endress+Hauser - LIQUIPHANT M
100 00 στη Γερμανία, D-79689 Maulburg Κωδικός παραγγελίας: 8B03AB01027 Um 8,2VDC ±20% MUR IEC 60947-5-6 A/2.2...3,5mA Ta<=+70°C CTp<= +150°C CE (T&Ta +5 K Endress+Hauser E L = 250mm switchpoint= 237mm (IP66/67/ NEVA MWP 275ps Dat: 1908
Endress+Hauser - FTL51-AAE2BB8G4C
100 00 στη Γερμανία, D-79689 Maulburg Κωδικός παραγγελίας: 8B03AB01027 Um 8,2VDC ±20% MUR IEC 60947-5-6 A/2.2...3,5mA Ta<=+70°C CTp<= +150°C CE (T&Ta +5 K Endress+Hauser E L = 250mm switchpoint= 237mm (SIL IP66/67/ NEVA MWP 275ps Dat: 1908
Endress+Hauser - FTL51-AAE2BB8G4C
Mettler-Toledo GmbH Business Area Load Cells CH-8606 Nänikon Made in Switzerland TBRICK 15-EX 4225213370 42101035 2004 Τύπος S/N ANR Έτος κατασκευής Ex 20 EEx lb IIC T4 -10°C T +40°C 2D IP 66/67 T +55°C KEMA 03ATEX1130 X Ανατρέξτε στα ακόλουθα σχέδια ελέγχου 507244, 506382, 2-86-202-451-00 22006397, 22006477, 22006478 - Αυτή η κυψέλη φορτίου είναι mandfaste σύμφωνα με ένα ή περισσότερα από τα Spel...
Mettler Toledo - TBRICK 15-EX
