BS EN 60519-21:2009 Safety in electroheat installations. Particular requirements for resistance heating equipment. Heating and melting glass equipment
BS EN 60519-21 applies to indirect resistance heating equipment for the heating and melting of glass, operating in voltage bands 1 and 2.
It specifies particular requirements that also apply to equipment for direct resistance heating and melting of glass by means of current introduced by electrodes passing through the charge to be heated.
The object of BS EN 60519-21 is the determination of safety requirements for both indirect and direct resistance heating equipment for the heating and melting of glass.
BS EN 60519-21 covers the safety aspects of electrical parts also in the case when electrical
heating is combined with other means of heating, for example liquid fuel heating.
Contents of BS EN 60519-21:
• Scope and object
• Normative references
• Terms and definitions
• Classification of electroheat equipment according to voltage bands
• Classification of electroheat equipment according to frequency bands
• General requirements
• Isolation and switching
• Connection to the supply network and internal connections
• Protection against electric shock
• Protection against overcurrent
• Equipotential bonding
• Control circuits and control functions
• Protection against thermal influences
• Risk of fire and danger of explosion
• Marking, labelling and technical documentation
• Information on inspection and commissioning and instructions for utilization and maintenance of electroheat installations