Sigma Miniature Circuit Breakers are produced in Türkiye in accordance with TS 5018-1 EN 60898-1 standards and CE norms, with short circuit breaking capacities of 4.5kA, 6kA 10kA and 16kA. Motor mechanism, trip coil, auxiliary contact and low voltage coil can be added to Sigma Miniature Circuit Breakers upon request, thanks to the wide range of accessories available. • Protection against overloads • Protection against short circuit currents • Opening and closing the circuit

The Ground Fault Circuit Interrupter (GFCI) is a life-saving protective device that detects current imbalances in electrical circuits and instantly cuts off the circuit within milliseconds in the event of an electrical leak. Its primary function is to measure the current difference between the phase and neutral in electrical installations, protecting people from electric shock and structures from fire risks caused by ground faults. Sigma Ground Fault Circuit Interrupters, which make a difference with domestic production technology, protect human life in direct or indirect contact with electrical leaks while also preventing fire risks caused by insulation faults, ensuring life and property safety. Produced in full compliance with TS EN 61008-1 standards and CE norms, Sigma Residual Current Protection Switches combine quality with domestic engineering power. The new Sigma 10mA Threshold Residual Current Circuit Breaker; The new Sigma 10mA threshold Residual Current Circuit Breakers are specially designed to protect people from electric shocks in water environments with high conductivity, such as swimming pools, ornamental pools, baths, and saunas. When a person is floating in water and exposed to a current of 15mA - 20mA, their muscles lock up and they become unable to move.  If a person is exposed to a current of 15mA - 20mA while swimming in water, their muscles lock up and they become unable to move. This limit, known as the “Release Threshold,” is around 10mA for the average adult. The new Sigma residual current protection switch ensures complete safety in hazardous water environments by cutting off power at just 7-8mA levels, even before reaching the critical threshold of 10mA.

  Sigma Surge Protection Devices are sensitive electrical protection tools that protect the devices connected to the network, the network and the installation against lightning-induced impacts (impacts penetrated into the network) and sudden impacts occurring within the facility. Sigma Surge Protection Devices are produced in accordance with TS EN 61643-11 standard with their ability to absorb overcurrents up to 100kA and overvoltages up to 1.4kV.  

Dome Switching Switches are circuit switching elements used to control lighting circuits from multiple points. They allow users to control connected lighting systems with simple buttons, offering economical and easy solutions for lighting large areas. Thanks to the special switching mechanism inside the impulse current switch, when the light switch is pressed once, the lighting circuit switches from the open position to the closed position if it is open, and from the closed position to the open position if it is closed. This switching operation is provided from multiple points using light switches.

Sigma Thermal-Magnetic Compact Circuit Breakers are manufactured in Turkey in accordance with TS 1058 EN 60947-2 standards and CE norms, with 1, 2, 3, and 4 poles in the 16A-1600A nominal current range. The most important function of thermal-magnetic compact circuit breakers, also known as circuit breakers, is to provide protection in the event of possible short circuits and overload conditions, in addition to opening and closing the circuit. The service breaking capacity (Ics), which indicates that the switch can continue to operate without performance loss after a short circuit, is 100% in our product range. (Ics: 100% Icu)

  Residual current protection relays, one of the critical equipment of electrical installations, are protection equipment that protect living beings from electric shocks and fire hazards in case of a possible leakage current. Sigma Residual Current Protection Relay provides holistic protection by using it with LV circuit breaker, trip coil and toroidal transformer in the residual current protection combination.  

Open-type circuit breakers serve as main disconnectors in electrical systems and effectively protect electrical equipment against overcurrent, short-circuit currents, and ground faults. They are ideal for safe and efficient use in power plants, industrial facilities, mines, and smart building distribution systems with high energy consumption. Sigma Open-Type Power Circuit Breakers are manufactured in accordance with the TS EN 60947-2 standard and CE norms. With fixed or drawer-type options as needed, and motorized or manually operated models, they offer safe and flexible use in different electrical systems. Sigma Open Type Power Switches, thanks to LSIG Protection; (Long Time Delay), long-term reverse time-delayed overcurrent protection (Short Time Delay), short-term delayed overcurrent protection (Instantaneous Tripping Delay) short-circuit current opening feature (Ground Fault Delay) ground fault protection features Provide superior protection for your system. Sigma New 42kA SCA/SMA Series Thanks to their much smaller and more compact dimensions compared to standard power circuit breakers, they allow you to save valuable space in your panels. Its smaller size and optimized design enable you to develop much more cost-effective solutions without compromising on quality. Sigma Open-Type Circuit Breaker Accessories Opening Coil: Used to remotely open the open-type circuit breaker. Closing Coil: Used to remotely close the open-type power switch. Instantaneous Undervoltage Coil: Opens the open-type power switch when the voltage drops below 70% of the operating voltage. Delayed types are available. Delayed low voltage coil + Closing Coil + RTC switch combination (SRTC): When performing a transfer operation on open-type power switches, the low voltage coil and the closing coil must not be activated simultaneously. To prevent this situation, it is recommended to use a delayed low voltage coil + closing coil + RTC switch combination. Motor Mechanism: Enables the circuit breaker to be opened and closed remotely or to be re-energized after tripping due to a fault. Mechanical Interlocking: A safety system that prevents two open-type power circuit breakers from closing simultaneously, thereby preventing the collision of different power sources (such as mains and generator).

  Sigma Automatic Transfer Switches are an electromechanical disconnector that automatically enables the transfer between two power sources. With the mechanical lock system inside, it prevents the other source from being activated while one of the two energy sources is active. In case the energy source feeding the load is cut off for any reason in the enterprises, it prevents the system from being de-energized by performing the transfer process between the two energy sources. With Sigma Automatic Transfer Switches, transfer operations can be done between mains-mains, mains-generator, mains-UPS, generator-generator, etc. is carried out between. It is used safely in places such as factories, plazas, shopping malls, hospitals, airports, metro and train stations, where energy outages may cause material and moral damage to the workforce, production and continuous services.  

  Sigma Horizontal Type Fuse Switch Disconnectors, when used with NH fuses, are electrical circuit protection and control elements that enable you to open and close the circuit manually, as well as to safely interrupt the circuit in case of any short circuit or overload current. Sigma Horizontal Type Load Breakers are produced in accordance with TS EN 60947-3 standards and CE norms. The body material consists of 960 degree heat resistant thermoplastic material, and the current-carrying parts are electrolytic copper with 99.9% purity.  

  Sigma Vertical Type Fuse Switch Disconnectors are manufactured in accordance with TS EN 60947-3 standard and CE norms up to 630 A, suitable for use with NH blade fuses in sizes NHC00, NH00, NH1, NH2 and NH3. Vertical type fuse switch disconnectors provide safe separation of nominal currents under load and protection against overcurrents when used with NH blade fuses.  

  Sigma NH fuses are produced in Türkiye with the latest technology in accordance with TS EN 60269-1 standard. Increased safety is provided by the steatite body material, which is extremely resistant to high temperatures, short circuits and pressure. Thanks to the dual indicator mechanism, it is easy to observe that the NH fuse is disabled, thus ensuring less downtime and less cost. In case of any short circuit, Sigma NH fuses quickly cut off the electrical transmission and isolate the section where the short circuit occurs.  

  Motor Protection Switch is an electrical control, command and protection element designed to protect electric motors against overload current (thermal current), short circuit currents and to manually activate and deactivate the electric motor.  

  Sigma Thermal Relays protect the motor circuits they are connected to against overcurrents and phase losses. Thermal relays produced according to TS EN 60947-4 1 can be used connected to contactors, as well as being used independently with a 35 mm DIN rail mounting adapter.  

  Sigma Low Voltage Contactors, from 9A to 800A, are produced in Türkiye  in accordance with the IEC/TS EN 60947-4-1 standard and are used safely in the switching and control of motors, lighting systems, compensation systems and various inductive loads in various usage categories.  

  Sigma Current Transformers convert primary currents ranging from 20A to 5000A into secondary currents (1A and 5A) with high accuracy. They offer both space-saving and economical solutions with their compact dimensions. Produced in Turkey in accordance with the TS EN 61869-2 standard, Sigma Current Transformers are used with measuring devices such as ammeters, multimeters, power meters, network analyzers, and reactive power control relays. Upon request, they can be produced with a seal from the Ministry of Industry and Trade for meter panels.  

  Rotary Cam Switches are mechanical switching elements that work with the effect of rotation. They are widely used in controlling electrical circuits in industrial facilities, electrical panels, large electrical machinery, residential and commercial buildings.  

  Digital measuring instruments measure the electrical parameters in your facility with high precision and reliability. Digital Voltmeters and Digital Ammeters Digital voltmeters measure voltages and digital ammeters measure currents; They perform digital processing, conversion and imaging. They can also compare input values to set values, transfer data, and perform other functions. Digital Multimeter Sigma Multimeters are produced in accordance with TS EN 60051-2 standards and measure the electrical parameters of the network to which it is connected. Technicial Specifications: – 3 Phase current, voltage and frequency measurement – Minimum and maximum demand values of current and voltage – Class 0.5 measurement accuracy – Production in 96*96mm size Power Meter Sigma Power Meters are produced in accordance with TS EN 60051-2 standards and measure the electrical parameters of the network to which they are connected. Thanks to its communication feature, it allows energy to be monitored and recorded. Technicial Specifications – RS 485 communication feature -Class 0.5 measurement accuracy – Production in 96*96mm size – Two products suitable for DIN rail mounting and panel cover mounting – Alarm output, dry contact output Energy analyzer Sigma Multi-Functional Network Analyzers are produced in accordance with TS EN 60051-2 standards and measure the electrical parameters of the network to which it is connected. Thanks to its communication feature, it allows energy to be monitored and recorded. Technicial Specifications Average - max-min voltage and current values, frequency, active power - reactive power - apparent power, power factor, active and reactive demand values of current, total harmonic distortion (THD) of current and voltage, percentage harmonic current and voltage up to the 31st harmonic allows measurement. – RS 485 communication feature – Production in 96*96mm dimensions – Two products suitable for DIN rail mounting and panel cover mounting – Alarm output, dry contact output – Measurement up to the 31st harmonic  

Sigma Industrial Relays are switching devices that control electrical circuits. The most common reason for using relays, which operate with an electromechanical system, in electrical and electronic circuits is to control both low and high currents.

Sigma's new generation Reactive Power Control Relays are a technological product that balances active power and reactive power ratios according to facility requirements by switching capacitors and shunt reactors on and off. It offers users comprehensive solutions for all compensation needs in balanced or unbalanced loads, rapidly changing or normally changing loads, facilities requiring SVC, and facilities operating outside inductive and capacitive limits. The Sigma Reactive Power Control Relay analyzes the system and system requirements. As a result, if there is an error in the system, such as a polarity error, it changes the connections internally. If there is a situation such as the number of stages or power of the capacitor-shunt reactor of the relay being insufficient, it provides recommendations to the user via the LCD screen.

The Sigma SVC System is an innovative solution developed to meet the needs of modern businesses with rapidly changing reactive loads and high capacitive characteristics, where classic compensation using capacitor stages is insufficient. Sigma Electric easily meets the compensation needs of businesses and factories with its 5, 10, 20 and 50 kVAr Sigma Electric Inductive Load Drives.

Shunt reactors are compensation elements used in compensation systems to balance capacitive loads. They are activated by a reactive power control relay when the capacitive load increases, thereby creating an inductive effect. The capacitive effect caused by long underground power lines, UPSs, computers, electronic ballasts, and LED lighting is compensated and balanced by the use of shunt reactors. Sigma Shunt Reactors are manufactured in single-phase stages from 0.25 kVAr to 10 kVAr and in three-phase stages from 0.25 kVAr to 50 kVAr.

Capacitors are used in facilities with inductive reactive loads such as motors, transformers, and coils to prevent the drawing of inductive reactive power from the grid and to avoid penalties. These capacitors are designed and implemented to compensate for the facility's reactive power under all conditions through various fixed or automatic applications depending on the load condition. Sigma Low Voltage Power Capacitors range from 0.25 kVAr to 5 kVAr in 230V single-phase capacitors, and from 0.25 kVAr to 50 kVAr in 400V, 415V, 440V three-phase capacitors from 0.5 kVAr to 50 kVAr, and additionally with 525V heavy-duty capacitors from 10kVAr to 30 kVAr, offering reliable and long-lasting solutions for the reactive power needs of compensation systems.

Sigma Compensation Contactors are contactors specially manufactured for compensation systems. High inrush currents occur when capacitors are switched on and off in compensation systems. These currents can reach values high enough to damage the contacts of standard power contactors. Therefore, special compensation contactors with the capacity to withstand the high currents that occur instantaneously in compensation systems must be used. The excessive current drawn when the capacitors are first energized is reduced by current limiting resistors before it reaches the main contacts of the contactor. This ensures that the contactor contacts are not exposed to the high currents generated during the energization of the compensation system. This prevents mechanical and electrical stress. Furthermore, the special V0 flame-retardant macaron used on the outer surface of the current limiting resistors prevents any fire risk during the passage of high currents. Sigma Compensation Contactors ensure that the compensation system has a longer electrical and mechanical life.

Uninterrupted energy, maximum safety and intelligent residual current management with Sigma SCRC03 Recloser for Residual Current Circuit Breaker! Sigma SCRC03 is an accessory that automatically re-energizes the circuit breaker to ensure system continuity in the case of a residual current circuit breaker failure. Sudden pulses, transient voltage fluctuations and harmonic components in the power grid can be misinterpreted by the residual current circuit breaker as system leakage. When such transient cases cease, there is no more leakage current in the system. Sigma SCRC03 Recloser for Residual Current Circuit Breaker waits for 10 seconds after the initial trip and then automatically recloses the circuit breaker when a transient case occurs that disables the residual current circuit breaker. If the leakage current continues, the residual current circuit breaker will open the circuit again and Sigma SCRC03 will reactivate, this time waiting for 60 seconds. If the leakage current is still at presence, the third and final reset will occur at 300. second. If the residual current circuit breaker opens the circuit at this point, the fault in the system must be intervened.

The sound produced when the contactor's contacts change position is inaudible thanks to the special internal design of modular contactors. Modular contactors absorb any noise that may occur during switching, ensuring maximum silence in the working environment. These features make them the ideal solution in areas where comfort and silence are a priority, such as hospitals, hotels, residential buildings, schools, and offices. With their long mechanical life and high switching capacity, they are reliably preferred as the main component of remote control and control systems across a wide range of applications, from shopping centers to production facilities.

Current protection relay protects the circuits against overcurrents; voltage protection relay protects the devices against sudden increases or decreases in voltage and prevents damage to the devices. Sigma Single Phase Adjustable Current Voltage Protection Relay provides space advantage in the board, providing both current and voltage protection in a single device. In this relay, both current and voltage parameters as well as opening and closing times can be set individually, so providing protection suitable for all operating conditions. Advantages - Space saving in the board- Easy installation & time saving- Easy maintenance and repair- Monitoring over and under current/voltage faults on the display Areas of Use - Industrial facilities- Power distribution systems- Electrical boards- Medical devices- Protection of motors against current

Sigma Isolation Transformers ensure the safe operation of your devices by isolating the primary input voltage from the secondary. Sigma Isolation Transformers have fixed input and output voltages of 230VAC or 400VAC and are manufactured to CE compliant and IEC/EN standards.

Sigma Control Transformers provide safe operation in devices with 400V AC or 230V AC input voltage and 24V output voltage, and are manufactured in accordance with CE and IEC/EN standards.

Sigma Electronic Type Compact Circuit Breakers provide protection against overload and short-circuit currents via an electronic control unit. They offer faster detection and tripping compared to thermal-magnetic compact circuit breakers in cases of overload and short-circuit, and their thermal-magnetic setting ranges are wider. They are unaffected by ambient temperatures up to 60°C. Electronic compact circuit breakers measure the current in each phase separately. Sigma Electronic Compact Circuit Breakers start measuring above 30A. An alarm signal activates when the current reaches 95% of the rated current.  It indicates that the switch is close to its nominal current value. When it reaches 105% of the nominal current, the overcurrent signal activates. It indicates that the switch has reached its opening limit. Model-based product versions with short-circuit delay and earth fault protection features (LSIG protected) provide superior protection.

Leakage Current Protected Compact Circuit Breakers (Fire Protection Circuit Breakers) provide protection against leakage currents in addition to thermal-magnetic protection. Since they have an internal detection mechanism, they do not require a combination of an external toroidal current transformer, residual current detection relay, and trip coil. This minimizes the complexity of panel wiring, resulting in significant savings in both labor and installation space.

Ground fault protected circuit breakers incorporate the protective functions of both ground fault protection switches and circuit breakers. Thus, they provide protection against both overloads and short circuits as well as ground faults in a single compact device. Ground fault protected circuit breakers save on cost and space, as well as time due to their ease of installation.

Wide Range of AccessoriesTrip Coil: Used to remotely trip the circuit breaker (move it to the trip position). Remote tripping is achieved by supplying 220V to the phase and neutral terminals of the trip coil.Low Voltage Coil: Opens the circuit breaker when the voltage drops below 70% of the operating voltage.Motor Mechanism: Enables remote opening and closing of the circuit breaker or reclosing of a switch that has tripped due to a fault.Auxiliary Contact: Provides information on whether the circuit breaker contacts are open or closed.Alarm Contact: Sounds an alarm when the circuit breaker trips.

Premium Series Compact Circuit Breakers MLT, SLT, ULT, XLT Series Premium Series Electronic Compact Circuit Breakers MLE, SLE, ULE, XLE Double Break Short Circuit Breaking System  Sigma Premium Series Compact Circuit Breakers can safely interrupt high short circuit currents up to 150kA thanks to their Double Break short circuit breaking system and current limiting technology. This technology enables the switch to extinguish the arc formed on the arc extinguishing plates much more quickly and easily at the moment of circuit interruption by creating a high pressure increase in the area where these plates are located.  In addition to traditional technologies, the Double Break breaking system; In the Double Break breaking system, since the pair of movable rotating arms moves with a rotating system, the inertia moment on the movable arm is reduced. In such a system, the breaking operation will be very fast and easy, thus directly increasing the breaking performance.  As shown in the figure, during contact, the movable contact bar, which has a rotation axis at the center, and the rotor, which is connected to the switching mechanism via a movable connection pin at each end of the conductor, are held. When the current supply mechanism is manipulated, the connection pin causes the rotor to move in a circular motion, and then the moving contact arm rotates counterclockwise to open the connections. In contrast, when the contacts are to interrupt a high current in the instantaneous opening function, the movable contacts, previously directed by electromagnetic force, move in the opening direction, and the operation is completed by opening the contacts with the clockwise rotation of the rotor to which they are connected. The fixed contact holder is positioned facing each end of the moving contact bar, and the fixed conductor is placed along the side surface of the moving contact bar, creating a magnetic opening field. As a result, when a current flows, the opposing magnetic fields generated by the magnetic opening field intersect perpendicularly with the conductor arm of the movable contact bar and apply an electromagnetic force to the arm in the contact opening direction. The combination of the movable contact bar with reduced inertia moment and the more advanced electromagnetic thrust increases the switching speed.  Additionally, the magnetic flux from the opening field also intersects perpendicularly with the arc generated between the contacts during interruption, causing a repulsive force to move toward the arc-preventing plate. When the arc reaches the plates and is broken at an early stage, the current limiter (limiter) exhibits high performance.