German Hegwein plug, Hegwein model, Hegwein price

Hegwein plug terminal blocks, as a type of connector, are an important component in the electrical industry, playing an irreplaceable and critical role. Since engineering technicians begin troubleshooting by inspecting interfaces, specifically the terminals, the design of terminal blocks is particularly important. Terminal blocks can be classified into: European-style terminal block series, pluggable terminal block series, transformer terminal blocks, building wiring terminals, barrier-type terminal blocks, spring-type terminal blocks, DIN rail-mounted terminal blocks, wall-through terminal blocks, and optocoupler-type terminal blocks. The plastic insulation materials and conductive components of terminal blocks directly affect their quality, determining the insulation performance and conductivity of the terminals, respectively.

Hegwein plug applications

Mainly applied in lighting, communications, security, and other industries. Pluggable terminal blocks have the widest range of applications, such as in variable frequency drives, explosion-proof equipment, CNC panels, access control controllers, sensors, PLC, instruments and meters, power supplies, servo drives. The common requirements for pluggable terminal blocks in these industries are: smooth insertion and extraction force, low contact resistance, and the ability to meet specific service life and fatigue endurance requirements, which imposes high demands on the material of the metal spring contacts. This requires product designers to have considerable experience in structural design and material selection. Barrier-type terminals are mainly applied in: power supplies, relays (especially double-deck terminals), variable frequency drives, elevator industry (less common), and air conditioning. The requirements for this series of terminals include high torque requirements for screws during wire clamping; the distance when the screw is retracted to its highest position must be greater than the maximum wire clamping range; long-position terminals must not warp or deform; and screws must have high corrosion resistance.

Hegwein plug material

1) The material for female or male terminals shall be copper alloy, or plated copper alloy, nickel, or nickel alloy. [Exception: If the structure of the electrical appliance or device permits, female or male terminals may be plated sheet metal, or unplated but corrosion-resistant alloy. 2) If formed female terminals or trimmed male terminals appear in the form of terminal strips, when the terminal strip is continuously fed into the processing tool, the terminals are curled and separated from the strip; in this case, the edge where the terminal connects to the strip does not require plating. The standard terminals used in temperature and thermal cycling tests shall be tin-plated sheet steel or corrosion-resistant steel. According to the Rockwell 30T hardness standard, their hardness shall be Rockwell hardness 68 ± 5. Exception: If the female terminal is only suitable for connecting male terminals made of copper alloy, then standard terminals made of C26000 copper alloy shall be used for testing. 2.3) According to the Rockwell 30T hardness standard, the hardness of standard terminals made of brass shall be 62 ± 7.

Hegwein plug troubleshooting

During electrical assembly, it is often found that individual core crimped wires are not fully inserted, or cannot be locked after insertion, resulting in unreliable contact. The analysis indicates that burrs or dirt at the threads of individual mounting holes cause jamming. Particularly in the last few mounting holes of a plug/socket already assembled by the manufacturer, once this defect is discovered, the crimped wires in all other installed holes must be removed one by one, and the plug/socket must be replaced. In addition, improper matching between wire diameter and crimping hole size, or errors in the crimping process operation, can lead to insecure crimped connections. Therefore, before shipment, the manufacturer must perform a pass-through test on all mounting holes of the sample plugs (sockets) to be delivered, i.e., using loading/unloading tools to simulate inserting wires crimped with pins or sockets to check if they can be locked. According to product technical specifications, the pull-out force of each crimped wire is inspected. Without reliable terminal blocks, there is no reliable system engineering. Failure and reliability are two aspects of a contradictory entity that correspond to and interact with each other. By identifying various failure modes and mechanisms through terminal block reliability screening, extensive lessons can be learned and hidden dangers eliminated, providing a scientific basis for improving design, manufacturing processes, inspection, and usage. It is also an important basis for revising and establishing technical conditions for terminal blocks. Finding measures to prevent failures and achieving the transformation from failure to reliability is the ultimate goal of failure analysis.

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