EN 50176:2025 pdf download

1.1 EN 50176 outlines the electrical specifications necessary for designing automatic electrostatic application systems intended for liquid coating materials that can ignite when atomized, operating within a temperature range of 5 °C to 40 °C. It addresses automatic electrostatic systems used for ignitable liquid coatings, where the overall conductivity of the system is restricted to a maximum of 50 nS/cm. With the implementation of additional safety measures, such as potential separation systems, these standards can also be applied to ignitable liquid coatings with a conductivity limit of up to 2,000 μS/cm. The document takes into account ignition risks associated with explosive atmospheres and the protection of individuals against electric shock.

1.2 EN 50176 sets forth requirements for machinery interfaces in accordance with EN 16985:2018, along with supplementary requirements for machinery governed by EN 1953:2025 and EN 12621:2025.

1.3 It also details the necessary conditions for the safe operation of electrostatic application systems, which includes guidelines for electrical installations. The requirements encompass the processing of coating materials as well as the procedures for cleaning and purging.

1.4 EN 50176 is relevant to three categories of spraying systems, as specified in section 5.1.1. Spraying systems are categorized as group II equipment, either category 2G (for use in zone 1 or zone 2) or category 3G (for use in zone 2). Only electrostatic spraying systems that operate with a d.c. sinusoidal ripple not exceeding 10% of the root mean square (r.m.s.) value are included.

1.5 Additional stipulations may apply for electrostatic application systems utilized in the food and pharmaceutical sectors.