DL28 Series Birth Background
When connectors carry currents reaching tens or hundreds of amperes, safety transitions from optional to mandatory. A single connection failure can cause overheating fires or electrocution accidents. Thus, uncompromising safety is non-negotiable for high-current connectors.
Safety: The Lifeline of High-Current Connectors?
Compared to low-current connectors, high-current variants face more severe thermal and insulation challenges, with risks primarily in two areas:
01. Overheating Risks
Abnormal heat generation is a fire hazard root cause. Per Joule’s Law (Q = I²Rt), the squared amplification effect of current (I) combined with abnormally increased contact resistance (R) produces dangerous heat (Q). Resistance increases due to:
①Poor contact: Oxidation/flaking of plating or abnormal wear from loose mating significantly raises resistance.
② Connection loosening: Insecure mating or vibration-induced separation creates high-energy arcing, vaporizing contacts and igniting surrounding materials. Consequences include: Sharp local temperature spikes, melted insulation, and connector fires.
02. Electrocution Risks
Inadequate safety protection transforms high-current connectors into potential hazards. Accidental contact with live terminals carrying tens/hundreds of amperes can have catastrophic consequences. Robust safety design is essential for operator protection.
CNLINKO DL28 Series: Safety-Engineered High-Current Connectors
Compared to IEC60309 plugs, the CNLINKO DL28 series offers not only a more compact size (nearly 50% smaller) and higher current capacity (double), but also makes safety its defining feature—ideal for demanding high-current applications.
Safety Design Advantages Over IEC60309
01. Touch-Proof Male/Female Terminals
Unlike IEC60309 plugs with insufficient touch protection, DL28 connectors feature:
✓ Integrated touch-proof structures on all terminals
✓ Physical barriers blocking finger access to live contacts
✓ Compliance with standard finger safety tests Eliminating electrocution risks even during accidental contact.
02. Dual-Locking Mechanism: Rock-Solid Connection
DL28’s proprietary safety system employs:
✓ Spiral bayonet + anti-retreat collar dual-locking
✓ High-strength spiral bayonet ensures tight initial engagement
✓ Anti-retreat collar reinforces primary lock via mechanical interlock This dual system surpasses IEC60309’s single-lock design by:
✓ Preventing accidental disconnection under vibration
✓ Eliminating arcing/overheating risks from loose mating
✓ Dramatically increasing overall safety margins
Conclusion
The DL28 series’ popularity stems not only from its compact high-current capabilities but from safety principles embedded in its design. From physical touch barriers to dual-locking reliability, DL28 delivers trustworthy protection for industrial and outdoor high-current applications—truly making safety its lifeline.