CALL US

(+971 ) 505372144

MAIL US

info@alittihadswitchgear.com

Welcome to Al Ittihad Electrical Switchgear 

Pre-Qualification 

Pre-Qualification 

We are pleased to introduce Al Ittihad Electrical Switchgear Industries L.L.C. as one of the leading LV switchgear manufacture and supplier serving since the last 23 years in the U.A.E. and the gulf region. Our main office and modern manufacturing facility is based in industrial area 11 , Sharjah , U.A.E. Al Ittihad is a successful industrial partner throughout the U.A.E. providing after sales customer service facility. Al Ittihad has a separate designing and manufacturing department equipped with professional and experienced technicians who have the capacity to assemble ASTA Certified panels like MDB, SMDB and final DBs. In addition to all types of power quality and control panels like ATS , VFDs , STAR-DELTA , DOL panels and Capacitor banks as per the standards specified by the local authorities such as SEWA , DEWA, FEWA and honorable consultants. We are using switchgear components like ABB, Schneider, Dorman Smith , Siemens , Legrand , Hager and Himel from recognized suppliers assembled according to the standards of ASTA with proper testing for various parameters like the flash test, primary and secondary injection test , Megger testing …etc. Our motto is to maintain high quality standard in the market which will enable us to meet and satisfy our clients requirements. We hope the above information is sufficient for your satisfaction and analyzing to our credibility, and we are willing to render our services to your valuable organization.

LIST OF EMPLOYEES

ORGANIZATION CHART

TESTING OF LV SWITCHGEAR

In line with providing the best quality LV switchgear panels & accessories to our clients , it is of utmost necessity to perform quality inspections and test all panels before delivery. The purpose of this document is to summarize the tests that are done in our factory on the low voltage electrical switchboards before being delivered to the site.

These include 6 tests, they are:


1. Visual Inspection
2. Functional and Operational Test.
3. Torque Test
4. Continuity Test
5. High Voltage Injection Test
6. Insulation Test
7. Primary Injection Test

1. Visual Inspection


Visual inspection with the customer will be carried out on the LV switchboard to:

  •  Check the layout of fitted components
  •  Check the overall dimension of the switchboard, size of busbars, cables, and earthing conductors, and location of feeder entry point.
  •  Check and verify the brand, model, and circuit identification of components installed such as breakers, current transformers, fuses, ammeters, voltmeters,  power meters, and protection relays, etc.
  •  Check the rating of the components matches the approved drawings.
  •  Check overall paintwork, door locking device, door gasket, door hinges, door cut-out holes
  •  Check the busbar and cable tightening, the marking, busbar clearance, base angle bar, and plinth
  •  Check the labels, nameplate and phase identification

2. Functional and Operational Test


Make sure the entire switchgear device in an open position. Check the incoming voltage and phase sequence. Energize the switchboard power circuit one by one. Check the measuring instrument showing the correct readings. Ensure padlocks are in position. Check the operation of the breaker.

3. Torque Test:


Tightness of the bolts will be tested with torque wrench to ensure proper tightness.

4. Continuity Test:


Continuity testing is the act of testing the resistance between two points. If there is very low resistance (less than a few Ωs), the two points are connected electrically, and a tone is emitted. If there is more than a few Ωs of resistance, than the circuit is open, and no tone is emitted. This test helps ensure that connections are made correctly between two points. More specifically, it helps detecting any broken conductor, damaged components (breakers) or excessive resistance.

5. High Voltage Injection Test:


With all breakers in ‘ON’ position, apply 2.5kV AC voltage between each stressed phase and all other phase connected to exposed conductive parts for 60 seconds and measure the leakage current. This test will help to test the insulation.

6. Insulation Test.


Carry out 1000V meggar test for phase to earth, neutral to earth, phase to neutral and phase to phase to measure the insulation resistance with all breakers in ‘ON’ positions.

7. Primary Injection Test


Primary current injection testing is utilized in high current/high voltage scenarios found at large electrical installations such as substations. A large current (between 100A and 20,000A depending on system specifications and test requirements) is injected directly on the primary side of the electrical system such as a circuit breaker. The objective of the test is to identify how the panel operates under various levels of current load. Primary injection testing is suitable for testing over-current trip relays attached to a circuit breaker. By injecting the current into the panel, we can measure if the breaker will trip or fail, and how long the current is live before the circuit is broken. Circuit breakers can go long periods of time without activation, and failure at the moment of activation can cause
catastrophic damage to the electrical system. Circuit breaker testing with primary current injection on a breaker that has not triggered in some time is the best way to recreate the real operating conditions of a current spike.

FACTORY ACCEPTANCE TEST CHECKLIST