This European Standard specifies requirements for limiters (or limiting devices) which are incorporated into
safety systems for water-tube boilers as defined in EN 12952-1.
A limiter (or limiting device) can be either:
a safety accessory as defined in the Pressure Equipment Directive, Article 1, clause 2.1.3, and needs to
include the safety logic and final actuator, or
one element of a safety system, for example, a self-monitoring water level sensor used as part of a safety
accessory as defined in the Pressure Equipment Directive, Article 1, clause 2.1.3. The overall boiler protection
function shall be provided in association with additional safety logic (where appropriate) and a final
actuator.
The design requirements and examination of functional capability for the limiters are covered in this European
Standard.
For an explanation of the extent of the limiter (or limiting device) see Figure A.1.
BS EN 12952-11:2007 Referenced Document
EN 298:2003 Automatic gas burner control systems for gas burners and gas burning appliances with or without fans
EN 50156-1:2004 Electrical equipment for furnaces and ancillary equipment Part 1: Requirements for application design and installation
EN 60529:1991 Degrees of Protection Provided by Enclosures (IP Code) (Incorporates Amendments A1: 2000 and A2: 2013)
EN 60730-1:2000 Automatic electrical controls for household and similar use - Part 1: General requirements (Incorporates Amendments A11: 2002; A12: 2003; A13: 2004; A14: 2005; A15: 2007, A16: 2007, and A2: 2008; Incorporating Corrigenda August 2007 and March 2010; Remain*， 2024-04-18 Update
EN 61000-4-11:2004 Electromagnetic compatibility (EMC) Part 4-11: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations immunity tests
EN 61000-4-2:1995 Electromagnetic Compatibility (EMC) - Part 4.2: Testing and Measurement Techniques - Electrostatic Discharge Immunity Test Includes Amendments A1:1998 and A2:2001; IEC 61000-4-2:1995 + A1:1998 + A2:2000
EN 61000-4-3:2006 Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test (Incorporates Amendment A2: 2010)
EN 61000-4-4:2004 Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test (Incorporates Amendment A1: 2010; Remains Current)*， 2024-04-18 Update
EN 61000-4-5:2006 Electromagnetic Compatibility (EMC) - Part 4-5: Testing and Measurement Techniques - Surge Immunity Test (Remains Current)*， 2024-04-18 Update
EN 61000-4-6:1996 Electromagnetic Compatibility (EMC) - Part 4-6: Testing and Measurement Techniques - Immunity to Conducted Disturbances@ Induced by Radio-Frequency Fields (Incorporates Amendment A1: 2001)
EN 61000-4-8:1993 Electromagnetic Compatibility (EMC) - Part 4-8: Testing and Measurement Techniques - Power Frequency Magnetic Field Immunity Test Including Amendment A1: 2001; IEC 61000-4-8: 1993 + A1: 2000; Remains Current
EN 61000-6-2:2005 Electromagnetic compatibility (EMC) Part 6-2: Generic standards - Immunity for industrial environments
EN 61508-3:2001 Functional Safety of Electrical/Electronic/Programmable Electronic Safety-Related Systems Part 3: Software Requirements
BS EN 12952-11:2007 history
0000 BS EN 12952-11:2007(2010)
2007BS EN 12952-11:2007 Water-tube boilers and auxiliary installations - Requirements for limiting devices of the boiler and accessories
2002BS EN 12952-10:2002 Water-tube boilers and auxiliary installations - Requirements for safeguards against excessive pressure
1999BS 1113:1999 Specification for design and manufacture of water-tube steam generating plant (including superheaters, reheaters and steel tube economizers)