EN 50156-1 applies to the application design and installation of electrical equipment, control circuits and safety-related systems for furnaces operated with solid, liquid or gaseous fuels and their ancillary equipment. It specifies requirements to meet the operating conditions of furnaces, to reduce the hazards of combustion and to protect the heated systems from damage (for example by overheating).
Such furnaces and electrical equipment can be part by way of example of the following plant:
— water heating systems,
— steam boiler installations (steam and hot-water boilers) and heat recovery steam boilers,
— warm air heaters,
— hot-gas heaters,
— heat exchanger systems,
— combustion chambers of stationary turbines,
— as long as no other standard is applicable for combined heat and power stations, we recommend the use of the requirements of this document.
EN 50156-1 can be used as a basis for the requirements placed on electrical equipment for furnaces, which are excluded from its field of application. EN 50156-1 specifies special requirements for the management of functional safety.
