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TECHNICAL MEASUREMENTS AND EVALUATION

TECHNICAL MEASUREMENTS AND EVALUATION
Grounding Measurement and Examinations
Grounding system can be described as establishing of a conductive connection between the specified points of panels, devices and machinery and the ground electrode. The ground electrode is buried into the ground as a conductive part, and an electrical connection is realized with the ground.
Grounding is establishing a conductive connection between the devices and the earth, and connection of the device body with the earth due to reasons such as insulation breakdowns that might occur in devices. This way, there will be no problem for people, because the fault current will flow to the earth. Since fault flows would flow through a person touching the device in case of no grounding, death incidents may occur depending on the level of the current.

Therefore, thanks to grounding, leakage currents are safely channeled to the earth, and if connected with an automatic switch system, the electricity system is safely cut. Therefore, right grounding is not only significant for protection of people’s lives, but also protection of devices and investments.

Article 3 of the Regulation on Grounding in Electrical Facilities that took effect on publication on the Official Gazette dated 21.08.2001 and numbered 24500 stipulates grounding measurements in facilities established or to be established. According to Annex-P of the same regulation, test and resistance measurements with regard to grounding in the industrial plants should be made periodically every year.

All electrical components in the plant such as the transformer, distribution switchboards, production machinery, generator, compressors, network sockets and combined sockets etc. should be periodically measured annually.

The control of the grounding installation is made by our authorized and expert engineers with Chamber of Electrical Engineers (EMO) certificates and having made necessary warnings, reporting will be made and delivered to the firm.

Lightning Rod Measurement and Examinations
Periodic measurement and examinations should be made periodically every year within the framework of the standard numbered TS EN 62305 and Regulation on Grounding in Electrical Plants. Components regarding the lightning rod installations are examined in detail and resistance value is reported by measurement. For measurement of the lightning rod grounding resistance, resistance is measured using the grounding megger from the test connector of exit conductives.

Internal Electricity Network Controls
In accordance with the Regulation on Health and Safety Conditions in Use of Work Equipment that took effect on publication on the official gazette numbered 28628 and dated 25.04.2013, internal electricity network should be periodically checked annually.

Internal electricity network controls are made by experienced electrical engineers with experience as expert in the concerned chambers of engineering in accordance with the Regulation on Grounding in Electrical Facilities, Regulation on Strong Electricity Current Facilities and Regulation on Internal Electrical Facilities as well as the matters set forth in TS EN 60079 standard.
 
In this context, the controls and compliance with regulations of all devices in the electrical network such as power room, cable shaft, counter and distribution panels, engines, lighting, weak current network, switches, hot water bottles, sockets, compensation system, fault current protective relays are checked. In addition to the report, the warming of the panels is checked via the thermal camera, and any dangerous condition is notified to the firms with a thermal report.

Generator Controls
In periodic controls of the generators, controls of manufacturer data, mechanical system controls, warning signs, other expressions in the concerned checklist form are made and controlled by our specialized engineers according to TS ISO 8528, and reporting is made having made necessary warnings and it is delivered to the firm.

Illumination Level Measurements
The illumination level measurements should be made within the scope of Labor Health and Safety in all plants such as production plant, warehouse, AVM, hospital, office, school, etc. Illumination is a factor that affects both physiologic and psychological condition and work performance of the people in an environment. It is important not only to meet visual requirements but also in terms of safety and comfort. Measurements are taken from necessary points according to the TS EN 12464 standard using cutting-edge measurement devices and our experienced specialist engineers, and measured values are reported back to the firm.

Noise Level Measurements
Noise level measurements should be made in enterprises to take necessary measures for protection of the employees from health and safety risks due to exposure to noise, particularly risks with regard to hearing.Measurement and investigation works are realized in accordance with the Regulation on Protection of Employees from Noise-Related Risks numbered 28721 and TS 2607 ISO 1999 standard.

Thermal Camera Controls
One of the most important applications of thermal cameras in engineering is checking the soundness of electrical systems. The test of electrical systems, one of the most widespread fields of use, is realized very fast without contact.

Sometimes a little electrical problem may cause big fires. Warming up may occur causing burning of a cable through which cable excessive current passes in a way you may not notice. This may cause big fires. It should be remembered that approximately 35% of industrial fires are caused by electrical fires. Not only routine controls can be made where electricity is, necessary controls should be done before interference in emergency cases. We can realize temperature control reliability using a thermal camera. Thermal cameras are used to determine warming ups in network components such as electricity panels, transformers, engine and pumps, switchyards, switches, contactors, power cables, breaker and fuses etc.
The temperatures in the panel are checked by our experienced electrical engineers using cutting-edge thermal camera and delivered to the firm in the form of a thermal report.

Cathodic Protection Measurements
Cathodic protection is significant for fuel tanks and pipes buried underground. Protection level tests are conducted to determine cathodic protection compliance of metallic buildings with cathodic protection system. Cathodic protection measurements are realized in accordance with TS 4363, TS 5141 EN 12954, TS 8591 and TS 9234 standards.
 
Insulation – Permeability Measurements
In case of utilization of platform vehicles in all kinds of works to be conducted on electrical transmission lines;

TEDAŞ Labor Safety Directive
Article 47 – If it is not possible to leave low voltage facilities out of voltage, then the following labor safety measures shall be taken because works on or around the facility are Work under Voltage Conditions.
b) If platform vehicles are used, the insulation level of the platform will be at least 2,5 kV.

Article 57 – All kinds of work in High Voltage facilities shall be held after the following transactions. f) In case of operation with platform vehicles, then the insulation level of the platform shall be at least 70 kV.

Almost all of the platform vehicles manufactured in our country unfortunately do not meet desired insulation conditions. Vehicle owners willing to have an insulation test on existing platform vehicles should first consider “…” standard as a guide, cut approximately 1,5 m on the arm carrying the bucket, and add high-resistance insulation material instead.

It should be remembered that the hydraulic hoses of platform vehicles with a hydraulic control rod on the bucket should feature insulation and also that their hydraulic oil should be non-conductive synthetic oil.
The insulation test can be made as described in TS EN 61057 standard only after all those transactions.

Bucket Insulation Test
Dielectric experiment on insulator buckets and coating materials:
Boring and Surface Resistance Experiments should be made on the bucket as described in TS EN 61057 standard to meet those features.

Boring Experiment
Insulator bucket or coating material is filled with mains water up to 0,15 m from the top (resistivity 50 Ω m at most). The bucket or coating material are placed within a grounded metal tank vertically as in the following figure, and the high voltage electrode is placed within the bucket or coating material. 20kV effective voltage should be applied for a period of 1 minute ±5 s for the buckets.

20kV effective voltage should be applied for a period of 1 minute ±5 s for the buckets.

No skip or penetration should take place as a result.

Surface Resistance Experiment
Surface resistance experiment should be made on the outside of the bucket or coating material. Two electrodes are placed at 0,30 m distance from each other. 50 kV effective voltage with network frequency should be applied between electrodes, and kept for a period of 1 minute ± 5 s.
No skip or penetration should take place as a result.

Note: The leakage current value is specified with its size, and in general it is less than 0,5 mA.

 
Leakage Current (Residual Current) Protection Relay Test
Leakage current protection relay is vitally important in preventing electricity shocks, and it is obligatory to add them to the network where grounding is not adequate according to the Regulation on Grounding in Electrical Facilities. The concerned regulation imposes placement of leakage current protection relays of 300 mA to main switchboards and of 30 mA to supplementary switchboards.

In preparation of the leakage current protection relay test report, it is checked whether the relays connected to the network provide necessary protection and the turn-on period of the relay.

The test of the relay is made by our authorized and expert engineers with Chamber of Electrical Engineers (EMO) certificates and having made necessary warnings, reporting will be made and delivered to the firm.

Electrical Panel Controls
Controlled use about electricity is significant. Safety is a significant factor besides use under control. The hardware in enterprises ensuring safe operation of all equipment producing electricity and ensuring safe operation of electrical network is called an electrical panel. For consumers with building type transformer station, the transformer low voltage output goes directly to the main switchboard, and its power distribution to supplementary switchboard is made from that point.

For consumers with a pole type transformer station, the electrical power from the measurement panel enters the main switchboard, and from there an output is made from the switches to supplementary switchboards. For work places without a transformer, the power from the main conduit box is inputted to the switchboard to distribute power to the facility from there. The power of the main switchboard and the facility can be controlled from a single board. Installation is made along with the compensation panel in big facilities.

The controls of the electrical panels are made within the framework of the Regulation on Internal Electricity Network, Regulation on Electricity Strong Current Networks and Regulation on Groundings in Electrical Plants. In this context, pre-test visual inspections, panel settlement controls, physical controls of the panel, physical controls within the panel, switchgear controls, controls of the connection ends of bars, controls of fixed cabling, controls of measurement devices, grounding controls of the panel, controls of leakage current protection relay, controls of switches and sockets are made.
The board controls are made by our authorized and expert engineers with Chamber of Electrical Engineers (EMO) certificates and having made necessary warnings, reporting will be made and delivered to the firm.

GERİ

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