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POCT
Three Universal Values

Create a Risk-Free Environment

Build a low-risk power system with stable and safe protection.

Maintain Stable and Safe Power

Ensure system reliability and avoid power outage risks.

Support a Net-Zero Future

Promote green energy for a sustainable and eco-friendly world.

With Elevators, Don't Forget the Stairs

Longmen Technical Service Co., Ltd. focuses on providing efficient and safe power protection solutions to create a friendly, stable, and sustainable power environment.

The core POCT system features a revolutionary passive design with no external power needed, automatically activating protection with top-tier speed and anti-vibration capabilities. Based on three core values—risk-free environment, stable power supply, and net-zero sustainability—the company is committed to building a green and harmonious world with cutting-edge protection technology.

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Dedicated to providing innovative technological solutions that protect personnel, living environments, and electrical equipment, we aim to achieve a stable, safe, clean, and sustainable living environment. Our focus is on leading industry development and supporting enterprises in reaching net-zero carbon emissions and sustainability goals.

Inventor

HSU, Lai-Wang

Triple-Layer Safety Design

A green-energy revolution with no power use and zero risk

No Power Supply Needed

Redefines protection with an innovative, power-free system.

High-Voltage Discharge

Operates with natural edge-discharge logic for safety.

Net-Zero Sustainability

Combines low-risk, carbon-free design to protect long-term.

Featured on Discover New Taiwan
Our Story & Innovative Technology

We’re honored to be interviewed by the show “Discover New Taiwan” — a chance to present our innovations and vision. In this feature, we share how our advanced power protection technology helps companies create a safer, more stable environment, while contributing to green energy and sustainability. Click the video below to explore our journey and future goals.

Return to Nature: 10 Technical Standard Verifications

We are committed to innovation and sustainability, launching 10 leading technical inventions.

These include passive control systems, smart signal management, seismic-proof electrical systems, and layered defense technologies. These innovations significantly enhance system safety and stability, while promoting net-zero carbon use and risk-free eco-electricity, helping companies achieve ESG sustainability goals for a greener future.

  • 60Hz AC power lifecycle integrity: 1Hz = 16.6ms. Based on electrical theory.
  • CB trip safety time: < 1Hz (16.6ms) per manual.
  • Three-phase mismatch less than < 2.8ms. Maintenance manual.
  • IEEE344: Seismic durability. Short-circuit reliability tested at ≥1.8G (2018).
  • IEEE693: Non-auto CB fuse trip time verified. IEEE Xrple (2024).
  • Free Trip-Out CNS.4734 2.3.15 CB activation time verification: <2.8ms (CNS.ANSI.1979). IEC13849-1.
  • Short-circuit arc (×50) trip time with signal system: 10× rated current. IEC61508. < 1Hz.
  • POCT & CB system trip test must be less than < 1Hz.
  • Manual CB trip: Three-phase mismatch must not exceed > 2.8ms.
  • CB electric trip test: Must not exceed > 1Hz.

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