Overview of UKK Power Distribution Block
UKK power distribution blocks are a cornerstone of modern electrical cabinets and control panels. These components are designed for modular applications, allowing safe and efficient splitting of a single power input into several output circuits. Common industry models such as the UKK80A and UKK125A are built for current ratings between 80A–500A, ensuring compatibility with a wide range of commercial and industrial equipment.
Ключевые особенности:
- Current range: 80 A – 500 A
- Rated voltage: up to 690 V AC/DC
- Wire range: 10 – 70 mm² (AWG 8 – 2/0)
- Screw-clamp connection for secure torque control
- Mounting: DIN-rail or direct panel
Built with copper alloy conductive parts and flame-retardant PA66 housing (UL 94 V-0), the UKK series ensures both safety and performance.
AOSI Electronics specializes in modular power solutions and certified terminal systems — Learn more about us ↗.
Understanding 1 in 6 Out and 1 in 11 Out Design
UKK distribution blocks are available in various configurations — the most common being 1 из 6 и 1 in 11 out.
1 in 6 Out (Medium Power)
Used when distributing from a single busbar to six devices, such as contactors, inverters, or PLC power modules.
Typical applications include machine controllers, lighting circuits, and distribution boxes under 100 A.
1 in 11 Out (High Density)
Preferred for multi-branch systems requiring several outputs from one main line, such as large control panels, switchboards, and building automation networks.
It provides a neat, organized layout for multiple load connections while ensuring low heat generation.
| Модель | Input × Output | Номинальный ток | Wire Range Input | Wire Range Output |
|
UKK80A，UKK125A， UKK160A |
1 × 6 | 80 A, 125A, 160A | 10–35 mm² or 6–16 mm² | 2.5–16 mm² |
|
UKK250A， UKK400A， UKK500A |
1 × 11 | 250 A, 400A, 500A |
Up to 120 mm², 185 mm², 192 mm² |
6–35 mm² *2 2.5–16 mm² *5 2.5–10 mm² *4 |
UKK Power Distribution Blocks
- Perfect for electrical engineers and panel builders seeking reliable, modular solutions for industrial power branching.
These modular configurations allow quick adaptation to different power circuits without custom fabrication.
Tools and Materials You Need Before Wiring
Before installing or servicing any UKK power distribution block, gather the correct materials and tools to ensure safety and performance.
Must-Have Tools
- Screwdrivers (Flat/Cross): For terminal screw operation
- Wire Strippers: Ensure precise insulation removal without nicking the conductor
- Torque Wrench: For correct tightening of terminal screws per manufacturer rating, often 1.2–2.5Nm for these blocks
Choosing the Right Cable
- Match cable size to input/output terminal requirements (input typically 6–35mm², output 2.5–16mm²)
- Use multi-stranded copper for flexibility and conductivity; always fit ferrules for stranded wires to ensure a solid mechanical connection
Additional Materials
- Multimeter: For continuity and final voltage checks
- Marking Labels: To record output circuit designations for future identification
Step-by-Step Wiring Guide (UKK80A Example)
The following procedure applies to most UKK models such as UKK80A and UKK125A. Follow these steps for safe and efficient wiring:
Step1. Preparation: Ensure the power is disconnected. Cut and strip cables to the recommended length.
Step2. Insert Wires: Place the prepared conductor fully into the input terminal and fix with the correct screwdriver.
Step3. Secure Connections: Apply the specified torque. For best results, use a torque wrench to avoid conductor deformation or loose contacts.
Step4. Inspection: Visually check, then use a multimeter to verify connectivity before energizing the block.
Step5. Install Cover: Fit the transparent safety cover and ensure it is locked in place.
Need wiring advice or sample support? Click below button to get more detail
Common Wiring Mistakes to Avoid
Even experienced technicians can encounter issues if installation guidelines are ignored. Avoid the following mistakes to ensure optimal safety and performance:
- Over-torquing screws: Can damage the conductor or crack the housing. Follow specified torque values.
- Under-torquing: May cause loose connections, leading to heat build-up.
- Incorrect strip length: Too long may expose metal; too short reduces contact area.
- Mixing different conductor types: Avoid combining solid and stranded wires in one terminal.
- Neglecting labels: Always mark output lines for future maintenance.
- Ignoring temperature rise: Ensure proper ventilation for high-current blocks.
FAQ — UKK Power Distribution Block Wiring
A1: Insert the main input cable into the larger terminal and tighten to rated torque; then insert each output wire into the smaller terminals. Perform a pull test to ensure secure fit.
A2: 1 in 6 out models handle medium currents (≤ 125 A); 1 in 11 out models are for dense load distribution or larger cabinets.
A3: Typically 2.5 – 6 N·m depending on model. Over-torque may damage the housing, while under-torque can loosen connections.
A4: Yes. They are rated up to 690 V AC/DC and used for industrial, automation, and renewable energy applications.
A5: Yes, models up to 250 A support standard 35 mm DIN rails; 500 A versions use panel mounting.
A6: All models meet UL, VDE, CE, and RoHS standards for global industrial applications.
Заключение
UKK power distribution blocks, particularly 1 in 6 out and 1 in 11 out models, deliver modular flexibility and robust safety in demanding industrial or commercial settings. Correct selection, careful preparation, and precision wiring—backed by the right tools and regular inspections—are essential for long-term reliability and safety.
By following detailed wiring practices and understanding the nuances of DIN rail installation, users can boost system stability while meeting both regulatory and operational demands. Always refer to technical datasheets and leverage the right accessories for specific application needs. For complex queries on torque, multi-circuit layouts, or troubleshooting, consulting factory documentation or certified technical support teams is strongly advised.
