Engineering Support Center
The central repository for Yuanhui’s technical documentation. Select your role to access curated resources, wiring schematics, and installation protocols.
Technical Downloads
Official engineering files for architects, lighting designers, and safety inspectors.
Photometric Data (IES/LDT)
Essential for DIALux/Relux simulations. Our IES files contain verified polar curves generated by our GO-2000 Goniophotometer.
- .IES: Standard North American format (LM-63).
- .LDT: EULUMDAT format for European projects.
- Spies: Zip includes UGR tables and isoline charts.
Installation & Wiring Manuals
Step-by-step instructions for electrical contractors. Includes safety torque values and cable stripping lengths.
- High Bay: Chain vs. Surface Mount procedures.
- Tri-proof: Linkable connection guide.
- Wiring: 0-10V, DALI, and Emergency Kit diagrams.
Compliance & Certificates
Download valid certificates for tender submission. Authenticity guaranteed for global market access.
Installation University
1. Safety Protocols & Pre-Installation Check
Before unboxing Yuanhui industrial fixtures, verify the site conditions. LED drivers are sensitive electronic devices; improper grid conditions can cause immediate failure.
Never connect the LED load to the driver while the driver is powered on. This creates a voltage spike that will destroy the LED chips immediately. Always turn off the main breaker before wiring.
Pre-Check Checklist:
- Voltage Verify: Confirm grid voltage matches the driver label (e.g., 100-277V vs 347-480V). Connecting 480V to a standard driver will cause catastrophic explosion.
- Transient Check: If installing in a facility with heavy motors (CNC, Cranes, Welding), ensure external Surge Protection Devices (SPD) are installed on the distribution panel.
- Inspection: Check specifically for “transportation rattle.” Shake the fixture gently; if you hear loose screws inside, do not install.
2. Wiring Diagram: 0-10V Dimming
Standard industrial dimming uses a 5-core cable configuration. The most common failure mode is shorting the low-voltage dimming wires (DIM+/DIM-) with high-voltage AC lines.
5-Core Cable Standard (IEC/UL)
Critical Installation Rules for 0-10V:
- Isolation: If you are NOT using dimming, you must cap the Purple and Gray wires separately with wire nuts. Do not twist them together (this will force the light to 0% brightness). Do not leave them touching the metal housing (short circuit).
- Polarity: 0-10V is DC voltage. Reversing polarity will simply result in the light staying at 100% or 0%, but usually won’t damage the driver.
- Class 1 vs Class 2: Most 0-10V wires in our fixtures are Class 2 (Low Voltage). Do not run them in the same conduit as high-voltage mains unless the cable insulation rating allows it (check local electrical codes).
3. Wiring Protocol: DALI / DALI-2
Digital Addressable Lighting Interface (DALI) offers individual fixture control. Unlike 0-10V, DALI is digital and non-polarized.
- Polarity Free: You cannot mess up DA+/DA-. The driver auto-detects polarity.
- Topology: Supports Star, Daisy-chain, or Tree topology. (Ring topology is NOT allowed).
- Cable Length: Max 300 meters from the DALI controller to the last fixture (using 1.5mm² cable) to prevent voltage drop below 9.5V.
4. Mechanical Mounting: Industrial High Bays
Proper mechanical fixation is crucial for safety, especially in vibration-prone zones (factories with stamping presses) or areas with thermal fluctuation.
Option A: Suspension Chain (The Warehouse Standard)
- Drill into the ceiling truss or concrete. Install an expansion hook capable of holding 4x the fixture weight (Safety Factor 4.0).
- Attach the supplied chain to the fixture’s eye-bolt. Torque the eye-bolt to 15Nm.
- CRITICAL: Use pliers to crimp the “S” hooks closed. Open hooks can vibrate loose over time.
- Attach the secondary safety cable (steel wire) to a separate structural point, not the same hook as the chain.
Option B: Surface Bracket (Low Ceilings)
When mounting directly to the ceiling, you must maintain a minimum 100mm air gap behind the driver box. Yuanhui brackets are designed with this offset. Do not remove the bracket to flush-mount the driver against insulation material; this will trigger Over-Temperature Protection (OTP) and cause the light to shut off.
Visualize the Light
Before You Install.
Don’t guess on Lux levels. Our certified lighting engineers use DIALux evo to build a 3D digital twin of your facility. We simulate the exact performance of our fixtures to ensure compliance with EN 12464-1 (Europe) or OSHA (USA) standards.
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Isoline Maps & False Color Rendering:Visual proof of light uniformity. Identify dark spots before purchasing.
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UGR Glare Analysis:Ensure visual comfort for workers. Critical for assembly lines (UGR<19) and offices.
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Energy ROI Report:Calculate the exact Payback Period (e.g., 14 months) compared to Metal Halide.
Engineering Knowledge Wiki
Defining the standards of industrial lighting. Understand the metrics that matter.
IP Ratings: IP65 vs IP67 vs IP69K
The Ingress Protection (IP) code is often misunderstood. For industrial lighting, higher isn’t always better; it depends on the application.
| Rating | Definition | Target Application |
|---|---|---|
| IP65 | Low-pressure jets (6.3mm nozzle). | General Warehousing, Workshops. |
| IP66 | High-pressure jets (12.5mm nozzle). | Outdoor Floodlights, Coastal Areas. |
| IP67 | Immersion (1m depth for 30 min). | Ground Recessed, Flood-prone areas. |
| IP69K | High-temp (80°C) steam jets @ 100 bar. | Food Processing (Washdown). |
Note: Our standard Tri-proof lights are IP66. Our specialized Food series is IP69K.
IK Impact Ratings (IEC 62262)
IK ratings measure kinetic impact resistance. In a factory with forklifts or a sports hall with balls, low IK ratings lead to immediate breakage.
- IK07 (2 Joules): Protected against a 0.5kg object dropped from 40cm. Standard for office panels.
- IK08 (5 Joules): Protected against 1.7kg dropped from 30cm. Minimum for industrial use.
- IK10 (20 Joules): Protected against 5kg dropped from 40cm. Mandatory for Vandal-Proof Outdoor and Sports applications.
Yuanhui High Bays use Polycarbonate or Tempered Glass to achieve IK08/IK10.
Color Consistency: MacAdam Ellipse (SDCM)
Have you ever seen a row of lights where some look pinkish and others greenish, even though they are all “4000K”? This is a binning issue.
SDCM (Standard Deviation Colour Matching) measures this variance:
- 1-Step: No visible difference (Lab standard).
- 3-Step: Virtually invisible to human eye. Yuanhui Standard.
- 5-Step: Noticeable difference. Common in cheap commercial LEDs.
- 7-Step: Very obvious mismatch.
UGR (Unified Glare Rating)
Glare isn’t just annoying; it reduces productivity and safety. UGR is a calculated value based on the room layout.
Common Benchmarks (EN 12464-1):
- UGR < 19: Precision work, Electronics Assembly, Drafting. (Requires Micro-Prismatic Lens).
- UGR < 22: Fine industrial work.
- UGR < 25: General warehousing and heavy industry.
We offer Low-Glare Linear Lights specifically for assembly lines.
Troubleshooting & Repair
Identify the root cause before requesting an RMA. 90% of issues are installation-related.
- Loose Neutral: In 3-phase systems, a floating neutral can cause voltage fluctuation. Check the distribution board.
- Dimmer Incompatibility: Are you using a TRIAC dimmer on a 0-10V driver? This will cause strobing. Ensure wiring matches the protocol.
- Over-Temp Protection: Is the fixture covered by insulation? The driver might be cycling on/off to protect itself from heat (OTP).
This is usually due to the “Vacuum Effect.” When a hot light turns off, it sucks air in. If the cable gland isn’t sealed, it sucks water through the wire.
Fix:- Check the Breather Valve. Is it painted over or blocked by dirt?
- Verify cable diameter matches the gland spec (e.g., PG11 gland needs 5-10mm cable). Using a thin cable creates a gap.
In 0-10V logic, an “Open Circuit” (wires not connected) = 100% Brightness. A “Short Circuit” (wires touching) = 0% Brightness.
- If lights are stuck at 100%, your purple/gray wires are likely disconnected or broken.
- If lights are stuck at 0%, the wires are likely shorted together or touching the housing.
Are you in a factory with Sulfur or Chlorine? Standard LEDs use silver plating which turns black (sulfurization) when exposed to sulfur gases.
Solution: You need our Harsh Environment Series with gold-wire bonding and gas-tight PMMA sealing. Standard lights will not survive this environment.
