LV Contactor
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SİGMA ELEKTRİK Do Not Risk Your Safety LOW VOLTAGE CONTACTORS ISO 9001 : 2008 www.sigmaelektrik.com

PROFILE COMPANY PROFILE Sigma Elektrik is one of the leading company focused on designing, manufacturing and marketing of Low Voltage switchgear components such as MCCB, MCB, RCCB, AC Contactors, Instrument Transformers, Motor Protection Switches, etc…. in Turkey. Sigma Elektrik is a leading supplier of solutions and services for electrotechnical installation in residential and commercial buildings as well as for industrial applications. Quality assurance and customer satisfaction are among SIGMA’s top priorities. The quality of products and services are constantly aimed at achieving...

SHORT CIRCUIT TESTING LABORATORY LABORATORY Sigma Elektrik owns the most comprehensive low voltage short circuit testing laboratory in which all the type test of low voltage switchgear and LV distribution board can be made. This laboratory which accelerates the company in product development studies, still provides services for many customers at home and abroad and contributes to the national economy. This guarantees the highest quality standards of our products. Since 2003 October it has been used by TSE (Turkish Standards Institution) as a Subcontractor laboratory and accredited by...

LOW VOLTAGE CONTACTORS LVC General Sigma Contactors are used to remotly control and protect ( in combination with thermal O/L relays ) electric motors and other electrical loads such as lamps,capacitors,transformers,pumps,etc.. with Nominal power up to 75 kW ( at 400 V AC-3 duty). These contactors feature compact, effcient designs that cover a comprehensive current range. Built-in auxiliary contacts are standard on every frame, and a broad range of control voltages are available. Easy to install and economically priced. Advantages • Mounting on DIN rails and on mounting plates • Technical...

Technical Specifications

LOW VOLTAGE CONTACTORS LVC Contactor Parts And Accessories 53NO 61NC 71NC 83NO 53NO SİGMA SİGMA SAC4-22 54NO 62NC 61NC SAC2-11 72NC 6 84NO R/1/L1 SİGMA U/2/T1 S/3/L2 54NO T/5/L3 62NC SCM-65 V/4/T2 W/6/T3 R/1/L1 S/3/L2 U/2/T1 V/4/T2 SİGMA T/5/L3 SCM-65 W/6/T3 SİGMA 1. Contactor 2. Interlock Unit Contactor 3. InterlockMechanical Locking Block Holder 4. Side-on Auxiliary Contact (2 Contacts) Mechanical Lock Holder Auxiliary Contact Mounting To Aside 5. Terminal Cover Terminal Cover 6. Head-on Auxiliary Contact (2 Contacts) Upper Mounting Auxiliary Contact (2 contact) 7. Head-on Auxiliary...

LOW VOLTAGE CONTACTORS LVC Utilization Categories Category Of Use Typical Use AC Current, cosp= P/S (-) AC-1 Non-inductive or slightly inductive load, resistance furnace Indudes all appliances supplied by AC current with power factor (cos.) 0,95. Examples of use: resistance furnace, indrustrial loads AC-2 Motor with slip-ring armature, switching off AC-3 Motor with short-circuit armature, switching when in operation This category applies to switching off motors with short-circuit armature while in operation while switching, contactor switches current which is 5 up to 7 times rated current...

LOW VOLTAGE CONTACTORS LVC Definition Of Utilization Categories IEC contactors should be selected according to the utilization category which is a combination of application and duty cycle rates defined by the following: • The type of application (inductive motor loads or resistive loads) • The conditions under which making or breaking current takes place (motor starting or running, reversing, plugging or jogging, locked rotor or stalled motor) • Number of making and breaking operations (or cycles) required for the life of the contactor Utilization Categories For Contactors Conforming To...

LOW VOLTAGE CONTACTORS LVC The follwing tables show the results of tests performed according to standart utilization categories conforming to IEC 60947 based on rated operational current (le) and rated operational voltage (Ve) Contactors Making and Breaking Conditions (normal operation) AC Supply Utilization Category Typical Applications Motors Squirel cage or slip ring motors starting.plugging ınching cos Breaking Ic/Ie U/Ue cos Marking Ic/Ie Ur/Ue cos Breaking Ic/Ie Ur/Ue cos AC-1 1 1 0.95 1 1 0.95 1.5 1.05 0.8 1.5 1.05 0.8 AC-2 2.5 1 0.65 2.5 1 0.65 4 1.05 0.65 4 1.05 0.65 AC-3 le < 17 A...

When a contactor is intended to control a resistive or slightly inductive AC load, its standard utilization category is stated as AC-l. Performances are valid for contactors without thermal 0/L relay and connected with conductor cross sections as indicated. Rated Power Utilization Categories For Contactors Conforming To IEC 60947-4

LOW VOLTAGE CONTACTORS LVC Switching Of DC Loads Sigma contactors are used for applications involving DC control circuits. It does not matter whether the power circuit is AC or DC. There are two considerations when using these contactors in applications involving a DC power circuit: 1. You can use the AC inductive/resistive rating as long as the voltage does not exceed 75 volts per pole., you can multiply the number of poles in series by the maximum voltage allowed per pole. 75 volts 150 volts 225 volts 300 volts 2. L/R ≤ 15 ms without derating. A time constant is defined as the length of...

REVERSING CONTACTORS LVC Reversing Contactors • • A Reversing Magnetic Contactor is the product built by combining two standard magnetic contactors by use of a highly reliable mechanical interlock unit. It is suitable for use in direct-reverse operation, plugging and transfer between commercial and noncommercial power source for a motor. L1 L2 L3 5 2 4 3 5 4 6 A2 22 A2 K2 Guide Groove 1 2 K1 6 21 3 22 1 A1 A1 Lever pin 21 Crossbar Groove Groove Protrusion U Guide Rail V W M 3~ Holder Reversing Application AC-3 Utilization Categories Type SCR-9 SCR-12 SCR-18 SCR-22 SCR-32 SCR-40 SCR-50...

CAPACITOR SWITCHING CONTACTORS LVC Capacitor Switching Contactors Sigma Capacitor Contactors are specifically designed to handle the unique application requirements for single or group PFC. The resistors work in conjunction with a special early-make auxiliary contact to pre-charge the capacitors so the main contacts do not see the peak inrush. After the pre-charge, the maincontacts then close after a time lag and conduct continuous current. 3 T/5/L 2 S/3/L A 1 GM R/1/L Sİ -03 KB M G Sİ A -05 GM KB Sİ In case of individual capacitor load, charging current peaks that are 30-time greater than...