IEC/EN 61386-24 Clause 10.3 Figure 101 Impact Test Apparatus for Buried Conduit Systems

The LS-B64 Impact Test Apparatus for Buried Conduit Systems is engineered for rigorous impact performance evaluation of rigid conduits and fittings designated for underground electrical installations. This precision testing equipment simulates mechanical impact conditions encountered in subterranean environments, enabling comprehensive assessment of structural integrity and impact resistance in accordance with international and national standards.

The apparatus incorporates a robust mechanical design ensuring precise sample positioning and consistent impact force application throughout testing protocols. It facilitates standardized impact testing procedures including specific pretreatment requirements and controlled impact methodologies to validate compliance with regulatory specifications for underground installation scenarios.

This testing solution provides laboratory technicians and quality engineers with reliable data for determining whether conduit products meet the stringent requirements for buried applications, supporting comprehensive quality verification and compliance documentation processes.

Standards Compliance

• IEC/EN 61386-24:2021 – Conduit systems for electrical installations – Part 24: Particular requirements for rigid conduits and fittings for underground use
• GB 20041.24-2019 – 电气安装用导管系统 第 24 部分：埋入地下的刚性导管及配件的特殊要求

Test Methodology

Sample Preparation

Prepare twelve (12) conduit or conduit accessory samples with dimensions of (200±5) mm in length. Test conduits independently; evaluate accessories following assembly with corresponding conduit sections. When necessary, accessory trimming is permissible provided it does not influence test outcomes. Determine the total mass of the impact hammer assembly including the striking head and guidance mechanism.

Test Conditions

Position the test apparatus on a stable, level surface. Subject all samples to pretreatment within a controlled temperature chamber maintained at (-5±1)°C for a duration of two (2) hours. Following extraction from the temperature chamber, immediately position each sample on the designated V-shaped support fixture (refer to Figure 101 in IEC/EN 61386-24). Complete all impact testing within ten (10) seconds of sample removal from the temperature-controlled environment.

Test Procedure

Administer a single impact to each test specimen using the calibrated impact hammer. Reference Table 102 in IEC/EN 61386-24 for appropriate impact energy values based on conduit classification. For accessory testing, direct impact forces to the structurally weakest point (minimum 5 mm from entrance interface). Conduct conduit impact testing at…