Topselvi, Kartal

Vibration under the E-5 loosens the gland. This is not Şeyhli 24 V hoist; that note sits at the OSB gate. This is not a Sanayi oily wall; that note is the lathe street. Here the ground workshop drops onto a dwelling kofra. If the gland is loose, moisture runs onto the NYY lug; that moisture is not coast salt, it is E-5 condensation and stair dust. Kordonboyu IP44 sits on that note. The Soğanlık sheet-steel box sits on that note; a Topselvi hall is not a new site. If three-phase sits the label is read. Schneider NSX, Siemens 3VA and ABB Tmax torque the same job differently. If a contactor sits the label is read; an OSB MCC is not invented. An aluminum–copper joint is not torqued without a ferrule. A soft starter and a VFD are not left in parallel on the same motor; on most calls neither sits.

The most frequent call in Topselvi is a residual current device that trips again the instant it is reset. The technician disconnects every branch at the board and resets the device; if it holds the fault is in the installation, if not the device itself has failed. Branches are energised one at a time until the offending leg is certain, and that leg is measured with a 500 V megohmmeter. This separates leakage from a damp bathroom junction box, a charred kitchen terminal or a defective appliance.

Inverter air conditioners, induction hobs and LED drivers generate high frequency harmonics that trip a standard Type AC device for no apparent reason; in those flats it is replaced with a Type A or a harmonic-immune Type F unit. At Topselvi addresses a single 30 mA device commonly protects the whole flat, so lighting, sockets and wet rooms are split onto separate devices. After installation the trip time is measured in milliseconds with a dedicated tester and written onto the service report.

If a concealed run in Topselvi breaks or starts leaking, there is no need to chase the wall end to end. The fault is first narrowed branch by branch at the board, then the route is followed from the surface with an inductive cable tracer and a FLIR thermal imager. A terminal heating under load shows as a clear hot spot on the thermal image and the area to be opened drops to centimetre scale.

Where the leakage is in an under-screed or underground run, a cable fault locator usually narrows the point to within a metre and only that area is opened. If the existing conduit is sound the cable is renewed along the same route with a draw wire; if the conduit is crushed, fire-retardant surface trunking is used. Where breaking is unavoidable its extent and cost are reported in writing first, and nothing is cut at a Topselvi address without approval.