Product Overview
ZHEJIANG SIPUN ELECTRIC CO., LTD. presents the ST3-2.5/3-3PV, an advanced triple-deck spring clamp terminal block engineered for maximum wiring density and electrical safety in complex industrial applications. This multi-level terminal block incorporates a sophisticated three-in-three-out configuration with integrated equipotential bonding functionality, providing twelve independent connection points across three vertical levels. It is specifically designed for demanding electrical distribution systems where space optimization, reliable potential equalization, and high-density wiring are critical requirements.
Technical Specifications
Product Applications & Usage
The innovative three-in-three-out triple-deck design with equipotential bonding makes the ST3-2.5/3-3PV an ideal solution for sophisticated electrical systems:
- High-Density Control Cabinets with Safety Bonding: The triple-deck vertical structure accommodates up to twelve connections in the footprint of a single traditional terminal while providing integrated equipotential bonding -1. This is essential for control cabinets, PLC systems, and safety circuits requiring reliable potential equalization.
- Complex Circuit Distribution with Safety Grounding: This terminal block excels in managing multiple circuits while maintaining safety bonding, enabling:
- Multi-Circuit Branching with Bonding: Efficiently distributing three input circuits into three separate outputs each on different levels while maintaining continuous equipotential bonding across all decks.
- Safe Signal Aggregation and Distribution: Combining multiple input signals and distributing them to various output devices while ensuring all exposed conductive parts remain at equal potential, crucial for automation systems and sensor networks.
- Potential Equalization: Facilitating the maintenance of equal electrical potential across all connected devices and decks, critical for personnel safety and equipment protection.
- Space-Optimized Panels Requiring Bonding: By integrating both high-density connections and equipotential bonding in one unit, it eliminates the need for separate bonding components, making it perfect for complex panels in industrial automation, process control, and power distribution where both space and safety are paramount.
Equipotential Bonding Functionality
The integrated equipotential bonding feature provides significant safety and operational advantages:
- Enhanced Personnel Safety: By maintaining all exposed conductive parts at equal potential, it prevents dangerous potential differences that could cause electric shock, ensuring compliance with electrical safety standards.
- Equipment Protection: Prevents circulating currents and potential differences that could damage sensitive electronic equipment connected to different parts of the system.
- Simplified Compliance: The integrated bonding functionality helps meet electrical installation standards requiring equipotential bonding in industrial control systems and electrical enclosures.
- Reduced Wiring Complexity: Eliminates the need for separate bonding wires between terminal levels, reducing installation time and potential wiring errors.
Spring Clamp Technology Advantages
The ST3-2.5/3-3PV utilizes reliable spring clamp technology, which offers significant benefits over traditional connection methods:
- Tool-Free, Rapid Installation: Conductors can be connected quickly and securely with a simple push-in action, eliminating the need for torquing tools and drastically reducing wiring time. This is particularly valuable when dealing with a high number of connections across three decks.
- Exceptional Vibration Resistance: The constant force exerted by the stainless steel spring ensures a stable, gas-tight connection that is highly resistant to loosening caused by vibration or thermal cycling.
- Long-Term Reliability: The spring mechanism automatically maintains optimal contact pressure on the conductor over time, preventing cold flow and oxidation, which leads to a maintenance-free connection with consistent electrical performance.
- Easy Inspection and Maintenance: The design allows for visual verification of proper wire insertion. A standard tool can be used to open the clamp via the test opening for easy circuit testing or wire modifications.
- High Safety and Durability: The housing is made from flame-retardant PA66 material (UL94 V-0), and the tin-plated copper contacts provide excellent conductivity and corrosion resistance, ensuring safe operation in various environmental conditions.
Comprehensive System Solution
This terminal block is part of a complete wiring system and is compatible with a range of accessories from ZHEJIANG SIPUN ELECTRIC CO., LTD.:
- Protective End Cover / Barrier: Cover ST3-2.5/3-3G provides finger safety and helps meet IP20 protection requirements.
- Bridging Components: Fork type Jumper FBS 10-5 allows for the creation of continuous potential groups across multiple terminal blocks on the same level.
- Identification: Marker ZB5 enables clear and permanent circuit identification across all three decks for easy maintenance and troubleshooting.
Compliance and Quality Assurance
The ST3-2.5/3-3PV Triple Deck Spring Terminal Block is manufactured in compliance with international and national standards, including:
Manufactured by ZHEJIANG SIPUN ELECTRIC CO., LTD. under a strict quality management system, the product undergoes rigorous testing to ensure consistent performance, electrical safety, and long-term durability.
Post time: Nov-18-2025