Frequently asked questions
From ordering and delivery to engineering projects, brand and equivalent selection to payment terms — the questions we are asked most, collected here. If you cannot find yours, write to us directly.
Ordering and delivery
How the process works, from quotation to dispatch.
What do I need to send to get a quote?
A material list, brand or model preference and your required date are enough. If you have no list, we can also make the selection from a single-line diagram, a panel photo or motor nameplate data. Quote requests are answered the same business day.
How quickly do you dispatch?
For items in stock we dispatch the same day or the next business day after order confirmation. For non-stock or custom-built items the lead time is stated per line in the quotation.
Do you ship outside İzmir?
Yes. We ship within İzmir and the Aegean region, and can deliver across Türkiye through contracted carriers.
Is there a minimum order value?
There is no fixed minimum. Wholesale price tiers apply by quantity; for small orders the shipping cost is shown separately in the quotation.
Can my order be shipped partially?
Yes. We can plan partial shipments around your site schedule, and for consumables we can set up a recurring delivery plan so you never run out.
Do you sell in small quantities too?
Our main model is wholesale and the price tier follows quantity. Even so, we supply single items needed within a project and pieces missing at the end of a job. If one terminal or one MCB is missing on a live project, we cover that too.
Can I collect material in person in an emergency?
Yes. Our base is in Halkapınar, İzmir, in the Gıda Çarşısı district and close to the Halkapınar metro interchange. For stocked items, confirming by phone or WhatsApp before you set off means the material is ready when you arrive.
Can delivery be split to match a site programme?
Yes. On bulky items such as trunking, conduit and enclosure bodies, where site storage is a problem, we split deliveries to your programme. For consumables we set up a recurring delivery plan so you do not run out.
Products, brands and stock
Which brands we work with, and how equivalents and technical selections are made.
Which brands do you distribute?
We distribute and sell Schneider Electric, Siemens, Omron, Inovance, Frecon, Sigma Elektrik, Himel, Seval Kablo, Erse Kablo, Onka, Mutlusan, Hüner, Eurowest, Konsan, IRTU, Weiller, Wepan and Tempa Pano, covering switchgear, automation, cable, enclosures and consumables under one roof.
What if you do not carry the brand on my list?
We source regardless of brand or model. We also present equivalents that meet the same function, with their technical differences and the price and lead-time impact in writing, so the decision stays with you.
Can I get help with product selection?
Yes. Our engineering team checks breaking capacity, discrimination, cable sizing and the protection chain from your single-line diagram, load list or motor nameplate. There is no separate charge for this.
How does the product warranty work?
All products carry the manufacturer's warranty. The period and terms vary by brand; your invoice serves as the warranty document and we handle the process with the manufacturer on your behalf.
Can I order cable by the drum?
Yes. Standard sizes ship from stock by the metre, and project quantities by the drum. For large quantities we give a delivery date based on the production schedule.
On what basis do you compare when proposing an equivalent?
Not just price: rated values, breaking capacity, trip curve, mounting dimensions, certificates and lead time. The differences are stated in writing, line by line, in the quotation. Where the specification mandates a brand we do not propose equivalents and follow the specification directly.
How does the product warranty process work?
The warranty process runs between us and the manufacturer; you do not deal with a separate party. Send us the faulty item with its invoice details. On products such as drives and PLCs, the manufacturer's inspection determines whether the fault came from use or from the product.
Do you share technical documentation and CAD drawings?
Yes. Catalogues, datasheets, dimensional drawings and, where available, CAD files are sent on request. For teams laying out panels these files speed the project up, and you can ask for them at quotation stage.
Engineering and projects
How we work on panel, SCADA, drive and safety projects.
Do you provide engineering as well as supply?
Yes. We deliver turnkey engineering in control panel design and build, SCADA and visualisation, drives and motor control (inverter) projects, machine safety, energy efficiency, and commissioning and service.
How does a project progress?
In four steps: site survey and needs analysis, engineering and quotation, supply and build, commissioning and handover. Each step has a written output, and the project is handed over with drawings, parameter backups and test records.
Do you charge for a site survey?
The first survey and needs analysis meeting is free of charge. For energy analysis work that requires detailed measurement, the scope and fee are agreed in writing beforehand.
Can you retrofit my existing panel?
Yes. We inspect the condition, heat load and wiring layout on site, then present a comparison of whether a retrofit or a new panel is more economical.
Do you support after commissioning?
Yes. We offer breakdown response, periodic maintenance and spare parts planning. For critical equipment we recommend a stocked spare parts agreement, and we keep parameter backups on file.
Do you share references?
We share comparable applications and site photographs during the meeting, within the limits of our confidentiality agreements.
Can I take only the engineering service and supply the material myself?
Yes. Survey, calculation, selection engineering, commissioning and training can each be taken separately. If you supply the material, we prepare the selection list brand-independently. One caveat: when material and engineering sit with different parties, responsibility for any mismatch found on site is split, which slows the fix.
Will you work on a system installed by someone else?
Yes. We start by taking an inventory: what devices are there, do drawings exist, can the program be backed up. If the PLC program is locked or there are no drawings, we say so up front; the work then takes longer because the system's logic has to be reconstructed by observation.
What documents are handed over at the end of a project?
Single-line and layout drawings, terminal and cable schedules, parameter backups, test records and the as-built file. Vision projects also include the recipe file, and safety projects the risk assessment and validation record. This file directly shortens the time of any later intervention.
Technical selection questions
The questions asked most often when selecting components.
What is the difference between B, C and D curves on an MCB?
The curve letter shows at what multiple of rated current magnetic tripping occurs: B at 3–5 times, C at 5–10, D at 10–20. Lighting and socket circuits use B or C; motors and transformers, with their high inrush, use D. The wrong curve causes either nuisance tripping at start-up or late clearing on a fault.
Should I choose 30 mA or 300 mA for the residual current device?
30 mA is for personal protection and is required on every circuit a person can touch: sockets, portable equipment, wet areas. 300 mA is fire protection and sits on the main distribution. When both are used, the upstream device must be selective (type S, time-delayed), otherwise both open on a fault.
How is panel temperature calculated, and is a fan or a cooling unit needed?
Add up the power loss (W) of every device inside and assess it against the enclosure surface area and ambient temperature. If ambient is below the target internal temperature, a fan and filter suffice; if ambient is already warm, or the panel must stay sealed at IP65, a cooling unit or heat exchanger is needed. Drives and power supplies account for most of the loss.
What determines the cable cross-section?
Whichever of three criteria is most demanding: current-carrying capacity, voltage drop and short-circuit withstand. On short runs current usually decides, on long runs voltage drop. Limits of around 3% for lighting and 5% for power circuits are accepted. Installation method, the number of cables run together and ambient temperature all reduce capacity.
What information is needed to select a PLC?
The digital and analogue I/O count, the communication protocol (Modbus, Profinet, EtherCAT and so on), whether an operator panel is needed, and any expansion planned later. Leaving at least 20% spare I/O is cheaper than adding a module afterwards. If the plant already has PLCs, staying in the same family helps with spares and training.
What do AC-1 and AC-3 mean in contactor selection?
They are utilisation categories. AC-1 is for resistive loads (heaters, lighting) and AC-3 for motor loads. The same contactor's AC-1 rating is higher than its AC-3 rating, because a motor draws multiples of rated current at start-up and the contacts close into that current. Always read the AC-3 figure when selecting for a motor circuit.
For emergency stop, a safety relay or a safety PLC?
The number of safety functions decides. With a single emergency stop and a few door switches, a safety relay is both cheaper and sufficient. As functions multiply (zone stops, speed monitoring, several doors, light curtains) the relay count and wiring grow complex, and a safety PLC becomes both tidier and easier to change. The required performance level (PL) comes from the risk assessment.
When is shielded cable needed and how should the shield be connected?
On drive output cables, analogue signal lines, encoder and communication cables. The shield should be bonded 360 degrees at both ends; a pigtail at one end does almost nothing at high frequency. Signal cables should not share a trunking route with power cables, and where they must cross, they should cross at right angles.
Invoicing, payment and accounts
The most common questions about the commercial side.
Are you registered for e-invoicing?
Yes, we are registered for e-invoicing. Our tax office is Ege V.D. and our tax number is 924 098 8223.
Do you only sell wholesale?
Our core model is wholesale: panel builders, electrical contractors, machine builders and plant maintenance departments are our main customers. We also quote single items within a project scope, with wholesale price tiers applied as quantity increases.
Which payment methods do you accept?
We accept bank transfer; our account details are published on the Contact page. Corporate customers may be offered payment terms based on account history.
Can I open a trade account?
Yes. Apply with your company details, tax certificate and signature circular. You can start the process with our accounting team at muhasebe@vektorenerji.com.tr.
Take a look at our technical articles
Articles covering selection criteria and field practice in more depth are in the blog section.
Have a project or a material list?
Send us your list; we return stock status, lead time and wholesale pricing the same day.

