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L.V Moulded Case Circuit Breakers, SIGMA

Moulded Case Circuit Breakers are produced according to IEC /EN 60947-2 and CE standards and used for protecting the circuits which have different characteristics like cable, motors, lighting, generators etc.)

Air Circuit Breakers

Air Circuit Breakers (ACB) are produced according to IEC/EN 60947-2 and CE standards as fixed type and drawout type. When requested , it fullfils closing or tripping functions from remote by adding motor operators as well.

Residual Current Circuit Breakers

Residual Current Circuit Breakers (RCCB) are used in order to protect the human life against hazardous electrical shock and prevent the fires caused from insulation failures by predetermining the insulation failures in system. Sigma RCCBs are produced according to IEC/EN 61008-1 and CE Standards.

LV Surge Protection Devices

Surge protections are manufactoring for protect the electrical machines which are faced with high voltage due to lightning. It provides full protection with opportunity of assemblying to main panels which are very high, high, standard capacity protection and secondary panels and also near to power sockets for sensitive protection as well.

L.V Power Contactors

Low voltage contactors are produced according to IEC/EN 60947-4-1. They are used remotely to control and protect (in combination with thermal O/L Relays) electrical motors and other electrical Loads such as lamps,capacitors, transformers, pumps etc.. when the contactors are used together with thermal O/L relays, they protect the circuits against overload current.

L.V Instrument Transformers

Low Voltage Current Transformers convert the primary currents which are from 20A to 5000A into 1A or 5A as secondary current in requested Accuracy and power Value . Sigma Current Transformers are produced in 9 different frame for various busbar sizes according to IEC/EN 60044-1.

Modular Din Rail

Sigma led rail type indicator lamps are produced in accordance with EN 60947-5-1.

Motor Protection Switches

Sigma motor protection switches designed for overload induction motors protection against load and short circuit conditions.


Measuring with analog measuring instruments is done by reading the position on a graduated scale of a moving ibn. Such devices are often used for AC current and voltage measurement because they are highly efficient

Rotary Cam Switches

Rotary Cam Switches are a mechanical power switches. It works by manually turning the control knob. In general, electric power circuits are used for multipurpose purposes such as switching on and off, pole change, star triangulation, commutator in the base control circuits.


Designed to follow the wells, pools, warehouses, tanks etc. level.

Automatic Transfer Switches

Automatic Transfer Switches (ATS) are produced according to IEC/EN 60947-2 and CE standards and fulfill transfering functions between network and Generator. ATS s are consisted of 2 pcs 4 poles MCCB 

Developed & Designed By:
Eng. Haitham Abdelraouf @2021