Intrinsically Safe Mining safety Coupler KTJ152

The KTJ152 Mine Safety Coupler is a critical device for transitioning between safe and non-safe areas in mine communication systems. When used in conjunction with a certified intrinsically safe mine-grade telephone and a switchboard or dispatching switchboard whose output parameters match the coupler’s input requirements, it provides safety isolation, transmits various types of signals, and forms a dispatching communication system suitable for underground use in coal mines.

Widely used in：

MARINE ENVIRONMENT

HIGHWAY SHOULDER

SUBWAY STATION

TUNNEL

UNDERGROUND FACILITY

RAILWAY PLATFORM

MINING SITE

OTHERS

KEY FEATURES

Compliance Standards: Complies with MT 402-1995 “General Technical Specifications for Safety Couplers for Coal Mine Production Dispatch Telephones” and enterprise standard Q/330110 SPC D004-2021.

Explosion-Proof Design: Features intrinsically safe output for mining applications, with explosion-proof marking: [Ex ib Mb] I.

Product Configuration: 4-way passive coupler design.

Connection Method: External wiring supports plug-and-play connections for simple and convenient installation.

DIMENSIONS

KTJ152 (1)

PACKAGE

Joiwo’s packaging reflects our commitment to reliability and protection. Designed to industrial standards, it ensures secure transit and organized unpacking. Key features include:

Robust Layered Protection: Heavy-duty cartons with custom foam/EVA inserts to prevent shock and vibration damage.

Organized Interior: Components are individually packed with anti-static protection and clear documentation.

Clear Traceability: Each box is labeled with product details and a unique QR/barcode for full traceability.

Tested for Durability: Packaging undergoes simulated transport tests and can be customized for extreme conditions.

FREQUENTLY ASKED QUESTIONS

1. What is a Mine Safety Coupler, and what is its purpose?

A Mine Safety Coupler is a critical isolation device used in communication systems for explosive hazardous environments such as coal mines. Its primary function is to provide electrical isolation and a safety barrier between the "safe area" (e.g., surface dispatch room) and the "non-safe area" (e.g., underground working face). It prevents dangerous energy from entering the underground zone while ensuring reliable transmission of voice, signals, and calls, thereby forming an intrinsically safe dispatch communication system.

2. Why is a Safety Coupler required? Can telephones be connected directly?

In flammable and explosive environments like underground mines, electrical sparks or energy from standard communication equipment can pose serious hazards. The Safety Coupler is a certified "intrinsically safe" explosion-proof component that limits the current and voltage transmitted underground to absolutely safe levels. Direct connection of non-isolated telephones or switchboards is prohibited as it does not comply with explosion-proof standards.

3. What equipment must be used with the KTJ152 Coupler?

It must be used as part of a complete system with the following certified equipment: - An intrinsically safe mine-grade telephone. - A dispatch switchboard or dispatching switchboard whose output parameters strictly match the coupler’s input requirements. - A proper power supply and communication cables. Note: Incompatible equipment may lead to system failure or loss of safety protection.

Joiwo is not just a manufacturer—we are a dedicated integrator of telecommunications solutions. We deliver not only terminal equipment, but also complete, end-to-end communication systems tailored to each client’s needs. Our integrated portfolio includes:

Core Communication Systems: IP PBX and IP servers

Management & Monitoring: Telephone self-diagnostic platforms and unified network management systems

Specialized Systems: Public Address & General Alarm (PAGA) and Emergency Voice Communication Systems (EVCS)

Customization Services: Tailored OEM solutions and feature-specific customization

At Joiwo, we build seamlessly integrated communication infrastructures—designed, deployed, and supported to perform reliably in even the most demanding environments.

KTJ152 (2)