Low-voltage distribution is the layer where energy reaches the end user within the facility, and it is the system that most directly affects day-to-day operational continuity. Every decision — from panel layout to cable cross-sections, from reactive power compensation to lighting levels — determines energy efficiency, occupational safety, and compliance in periodic inspections.
In LV design, Miratek treats the facility as a whole. Main and sub-distribution panels are defined within the IEC 61439 framework; cable sizing and voltage drop calculations, the residual current protection scheme, and selectivity are prepared in accordance with the Electrical Indoor Installations Regulation. Lighting design is based on room-by-room illuminance calculations against the relevant TS EN standards.
Projects begin with a site survey and load analysis and conclude with an approved execution design. On request, execution, testing, and commissioning are delivered turnkey by the same team.
Technical Scope Summary
| Voltage Level | Low voltage of 1000 V and below |
| Application Areas | Industrial facilities, commercial buildings, warehouse and logistics buildings, infrastructure facilities |
| Design Scope | Main and sub-distribution panels, power and socket installations, lighting, reactive power compensation |
| Calculation Scope | Cable sizing and voltage drop, short circuit, selectivity, illuminance levels |
| Compliance Framework | Electrical Indoor Installations Regulation, IEC 61439, relevant TS EN lighting standards |
| Delivery Model | Turnkey process from site survey to approved execution design |
How We Work
Site Survey and Load Schedule
All facility loads are listed room by room; diversity factors and growth margins are determined.
Distribution Architecture Design
The distribution backbone of main panel, sub-panels, and feeder lines is structured with selectivity in mind.
Calculations and Panel Designs
Cable sizing, voltage drop, and short-circuit calculations are performed; panel single-line diagrams and label schedules are prepared.
Lighting and Special Systems Design
The lighting design with room-by-room illuminance calculations, together with emergency lighting and reactive power compensation design, is completed.
Approval and Delivery
The design passes through the approvals of the relevant authorities and institutions, and is delivered with the detail sheets the execution team will use.
Scope of Work
- LV main and sub-distribution panel designs
- Power, socket, and feeder installation design
- Indoor and outdoor lighting design with illuminance calculations
- Emergency lighting and exit guidance designs
- Reactive power compensation system design
- Cable sizing, voltage drop, and selectivity calculations
- Management of authority approval processes
Frequently Asked Questions
Our existing installation failed the periodic inspection — can a design resolve it?
A large share of non-conformities stems from undesigned or off-design modifications. Miratek surveys the as-is condition, prepares a revised design that resolves the non-conformities, and on request also takes on its execution.
What drives the decisions in lighting design?
For each room, a target illuminance appropriate to its use is set, and luminaire selection and layout are calculated against that target. LED conversion and automation scenarios for energy efficiency are evaluated within the same study.
Why is reactive power compensation addressed at the design stage?
To stay within the reactive penalty limits, the compensation system must be sized to the load profile. A system structured correctly at the design stage removes the penalty risk in operation and the cost of retrofitting later.
