prEN IEC 60730-2-9:2024
(Main)Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing controls
Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing controls
Automatische elektrische Regel- und Steuergeräte – Teil 2-9: Besondere Anforderungen an temperaturabhängige Regel- und Steuergeräte
Dispositifs de commande électrique automatiques - Partie 2-9: Exigences particulières pour les dispositifs de commande thermosensibles
Avtomatske električne krmilne naprave - 2-9. del: Posebne zahteve za temperaturne regulatorje
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Avtomatske električne krmilne naprave - 2-9. del: Posebne zahteve za
temperaturne regulatorje
Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing
controls
Dispositifs de commande électrique automatiques - Partie 2-9: Exigences particulières
pour les dispositifs de commande thermosensibles
Ta slovenski standard je istoveten z: prEN IEC 60730-2-9:2024
ICS:
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
72/1428/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60730-2-9 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-06-28 2024-09-20
SUPERSEDES DOCUMENTS:
72/1423/RR
IEC TC 72 : AUTOMATIC ELECTRICAL CONTROLS
SECRETARIAT: SECRETARY:
United States of America Ms Grace Roh
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Automatic electrical controls - Part 2-9: Particular requirements for temperature sensing
controls
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -2- 72/1428/CDV
1 CONTENTS
2 CONTENTS . 2
3 1 Scope . 8
4 2 Normative references . 9
5 3 Terms and definitions . 9
6 3.2 Definitions of types of controls according to purpose . 9
7 3.3 Definitions relating to the function of controls . 10
8 3.5 Definitions of types of control according to construction . 10
9 4 General . 11
10 4.3 General notes on tests . 11
11 5 Required technical information . 11
12 5.2 Methods of providing technical information . 11
13 5.3 Class II symbol . 12
14 6 Protection against electric shock . 13
15 7 Provision for protective earthing . 13
16 8 Terminals and terminations . 13
17 9 Constructional requirements . 13
18 9.1 Materials . 13
19 9.3 Actuation and operation . 13
20 9.4 Actions . 13
21 9.6 Mounting of controls . 17
22 9.101 Time factor . 18
23 10 Threaded parts and connections . 18
24 11 Creepage distances, clearances and distances through solid insulation . 18
25 12 Components . 18
26 13 Fault assessment on electronic circuits. 18
27 13.1 Fault assessment for inherent safety . 18
28 14 Moisture and dust resistance . 18
29 14.101 Refrigeration controls . 18
30 15 Electric strength and insulation resistance . 19
31 16 Heating . 19
32 16.4 Additional subclauses . 19
33 17 Manufacturing deviation and drift . 20
34 18 Environmental stress . 20
35 19 Endurance . 20
36 19.15 Test for particular purpose controls . 20
37 19.101 Type 2.P cycling test . 23
38 20 Mechanical strength . 25
39 20.101 Push-and-turn or pull-and-turn actuation . 25
40 20.102 Parts containing liquid metal . 26
41 21 Resistance to heat, fire and tracking . 26
42 22 Resistance to corrosion . 26
43 23 Electromagnetic compatibility (EMC) requirements – Emission . 26
44 24 Normal operation . 27
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -3- 72/1428/CDV
45 25 Electromagnetic compatibility (EMC) requirements – Immunity . 27
46 26 Abnormal operation tests . 27
47 Annex G (normative) Resistance to heat, fire and tracking tests . 28
48 G.3 Ball pressure test . 28
49 Annex H (normative) Requirements related to functional safety . 29
50 H.3 Terms and definitions . 29
51 H.5 Information . 29
52 H.9 Constructional requirements . 29
53 H.13 Fault assessment on electronic circuits . 30
54 H.17 Manufacturing deviation and drift . 31
55 H.25 Electromagnetic compatibility (EMC) requirements – Immunity . 32
56 Annex J (normative) Requirements for thermistor elements and controls using
57 thermistors . 39
58 J.4 General notes on tests . 39
59 Annex R (informative) National differences relevant in the United States of America . 40
60 R.2 Normative references . 40
61 R.4 General . 40
62 R.9 Construction Requirements . 40
63 R.14 Moisture and dust resistance . 40
64 R.15 Electric strength and insulation resistance . 40
65 R.19 Endurance . 40
66 Annex S (informative) National differences relevant in Japan . 43
67 S.2 Normative references . 43
68 Annex T (informative) National differences relevant in Canada . 44
69 T.2 Normative references . 44
70 T.4 General . 44
71 T.9 Construction Requirements . 44
72 T.14 Moisture and dust resistance . 44
73 T.19 Endurance . 44
a, b
74 Annex AA (informative) Maximum manufacturing deviation and drift . 48
75 Annex BB (informative) Time factor . 49
76 BB.1 General . 49
77 BB.2 Time Factor Determination . 49
78 BB.3 Two-bath method . 49
79 BB.4 Gradient method . 49
80 Annex CC (informative) Number of cycles . 52
81 Annex DD (informative) Controls for use in agricultural confinement buildings . 53
82 DD.1 Object . 53
83 DD.2 Terms and definitions . 53
84 DD.3 Test apparatus . 53
85 DD.4 Severities . 53
86 DD.5 Pre-conditioning . 53
87 DD.6 Initial measurements . 53
88 DD.7 Testing . 54
89 DD.8 Recovery . 55
90 DD.9 Evaluation . 55
91 Annex EE (informative) Guide to the application of temperature sensing controls
92 within the scope of IEC 60730-2-9 . 57
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -4- 72/1428/CDV
93 EE.1 General . 57
94 EE.2 Selection of temperature sensing controls within the scope of IEC 60730-2-9 . 57
95 EE.3 Classifications common to temperature sensing controls. 58
96 EE.4 Specific types of temperature sensing control . 67
97 EE.5 Examples of controls used with domestic appliances . 75
98 Bibliography . 80
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -5- 72/1428/CDV
102 INTERNATIONAL ELECTROTECHNICAL COMMISSION
103 ____________
105 AUTOMATIC ELECTRICAL CONTROLS –
107 Part 2-9: Particular requirements for temperature sensing controls
109 FOREWORD
110 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
111 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
112 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
113 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
114 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
115 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
116 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
117 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
118 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
119 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
120 consensus of opinion on the relevant subjects since each technical committee has representation from all
121 interested IEC National Committees.
122 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
123 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
124 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
125 misinterpretation by any end user.
126 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
127 transparently to the maximum extent possible in their national and regional publications. Any divergence between
128 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
129 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
130 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
131 services carried out by independent certification bodies.
132 6) All users should ensure that they have the latest edition of this publication.
133 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
134 members of its technical committees and IEC National Committees for any personal injury, property damage or
135 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
136 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
137 Publications.
138 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
139 indispensable for the correct application of this publication.
140 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
141 rights. IEC shall not be held responsible for identifying any or all such patent rights.
142 IEC 60730-2-9 has been prepared by IEC technical committee 72: AUTOMATIC ELECTRICAL
143 CONTROLS. It is an International Standard.
144 This 5.0 edition cancels and replaces Edition 4 and Amendment 1:2018-01 and Amendment
145 2:2020-04. This edition constitutes a technical revision.
146 This edition includes the following significant technical changes with respect to the previous
147 edition:
148 a) adoption to IEC 60730-1 Ed.6.0 with all of its significant changes to IEC 60730-1 Ed.5.2,
149 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
151 Full information on the voting for its approval can be found in the report on voting indicated in
152 the above table.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -6- 72/1428/CDV
153 The language used for the development of this International Standard is English
154 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
155 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
156 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
157 described in greater detail at www.iec.ch/publications.
158 A list of all parts of the IEC 60730 series, under the general title: AUTOMATIC ELECTRICAL
159 CONTROL, can be found on the IEC website.
160 This part 2-9 is intended to be used in conjunction with IEC 60730-1. It was established on the
161 basis of the sixth edition of that standard (2022). Consideration may be given to future editions
162 of, or amendments to, IEC 60730-1.
163 This part 2-9 supplements or modifies the corresponding clauses in IEC 60730-1, so as to
164 convert that publication into the IEC standard: Particular requirements for temperature sensing
165 controls.
166 Where this part 2-9 states "addition", "modification" or "replacement", the relevant requirement,
167 test specification or explanatory matter in part 1 should be adapted accordingly.
168 Where no change is necessary part 2-9 indicates that the relevant clause or subclause applies.
169 In the development of a fully international standard it has been necessary to take into
170 consideration the differing requirements resulting from practical experience in various parts of
171 the world and to recognize the variation in national electrical systems and wiring rules.
172 The reader's attention is drawn to the fact that Annex R, Annex S and Annex T list all of the "in-
173 some-country" clauses on differing practices of a less permanent nature relating to the subject
174 of this document.
175 In this publication:
176 1) The following print types are used:
177 – requirements proper: in roman type;
178 – test specifications: in italic type;
179 – explanatory matter: in smaller roman type.
180 – Defined terms: bold type.
181 2) Subclauses, notes or items which are additional to those in Part 1 are numbered starting
182 from 101, additional annexes are lettered AA, BB, etc.
186 The committee has decided that the contents of this document will remain unchanged until the
187 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
188 specific document. At this date, the document will be
189 • reconfirmed,
190 • withdrawn,
191 • replaced by a revised edition, or
192 • amended.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -7- 72/1428/CDV
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -8- 72/1428/CDV
196 AUTOMATIC ELECTRICAL CONTROLS –
198 Part 2-9: Particular requirements for temperature sensing controls
200 1 Scope
201 This clause of Part 1 is replaced by the following:
202 This document applies to temperature sensing controls
203 • for use in, on, or in association with equipment for household appliance and similar use,
204 including equipment for heating, air-conditioning and similar applications. The equipment
205 may use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
206 NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" " and „controls“ means
207 „temperature sensing controls“.
208 • for building automation within the scope of ISO 16484 series and IEC 63044 series
209 (HBES/BACS);
210 EXAMPLE 1 Independently mounted temperature sensing controls, controls in smart grid systems and controls for
211 building automation systems within the scope of ISO 16484-2.
212 • for equipment that is used by the public, such as equipment intended to be used in shops,
213 offices, hospitals, farms and commercial and industrial applications;
214 EXAMPLE 2 Controls for commercial catering, heating and air-conditioning equipment.
215 • that are smart enabled controls;
216 EXAMPLE 3 Smart grid control, remote interfaces/control of energy-consuming equipment including computer or
217 smart phone.
218 • that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V
219 DC where the DC source is provided by primary or secondary batteries;
220 • used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar
221 thermal energy, etc., or a combination thereof;
222 • utilized as part of a control system or controls which are mechanically integral with
223 multifunctional controls having non-electrical outputs;
224 • using NTC or PTC thermistors and to discrete thermistors, requirements for which are
225 contained in Annex J;
226 • that have electrical circuits and control circuits which are, for example, operated by
227 bimetals, magnet coils, memory metals, pressure elements, temperature-sensitive
228 expansion elements or electronic elements.
229 • as well as manual controls when such are electrically and/or mechanically integral with
230 automatic controls.
231 NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are
232 contained in IEC 61058-1-1.
233 This document applies to
234 – the inherent safety of automatic electrical controls, and
235 – functional safety of temperature sensing controls and safety related systems,
236 – controls where the performance (for example the effect of EMC phenomena) of the product
237 can impair the overall safety and performance of the controlled system,
238 – the operating values, operating times, and operating sequences where such are associated
239 with equipment safety and to the testing of automatic electrical temperature sensing
240 control devices used in, or in association with, equipment.
241 EXAMPLE 4 boiler thermostats, fan controls, temperature limiters and thermal cut-outs.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -9- 72/1428/CDV
242 – electrical safety of temperature sensing controls with non-electrical outputs such as
243 refrigerant flow and gas controls.
244 – single operation devices as defined in this standard.
245 This document specifies the requirements for construction, operation and testing of automatic
246 electrical controls used in, on, or in association with an equipment.
247 This document does not
248 • apply to automatic electrical temperature sensing controls intended exclusively for
249 industrial process applications unless explicitly mentioned in the relevant part 2 or the
250 equipment standard. However, this document can be applied to evaluate automatic electrical
251 controls intended specifically for industrial applications in cases where no relevant safety
252 standard exists.
253 • take into account the response value of an automatic action of a control, if such a response
254 value is dependent upon the method of mounting the control in the equipment. Where a
255 response value is of significant purpose for the protection of the user, or surroundings, the
256 value defined in the appropriate equipment standard or as determined by the manufacturer
257 will apply.
258 • address the integrity of the output signal to the network devices, such as interoperability
259 with other devices unless it has been evaluated as part of the control system.
260 2 Normative references
261 Addition:
262 IEC 60216-1 Electrical insulating materials – Thermal endurance properties – Part 1: Ageing
263 procedures and evaluation of test results
264 IEC 60691, Thermal links – Requirements and application guide
265 3 Terms and definitions
266 This clause of Part 1 is applicable except as follows:
267 3.2 Definitions of types of controls according to purpose
269 Additional definitions:
270 3.2.101
271 single-operation device
272 SOD
273 control having a temperature sensing element which is intended to operate only once and
274 then requires complete replacement
275 3.2.101.1
276 bimetallic single-operation device
277 single operation device (SOD) having a bimetallic temperature sensing element
278 Note 1 to entry: A bimetallic single operation device (SOD) does not reset above a declared temperature (see
279 11.4.103).
280 Note 2 to entry: Requirements for thermal links (which are not allowed to reset) are contained in IEC 60691.
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -10- 72/1428/CDV
281 3.2.101.2
282 non-bimetallic single-operation device
283 single operation device (SOD) having a temperature sensing element which is part of a
284 combination action control, the operation of which cannot be separated from other functions
285 of the control and having a non-bimetallic thermal element that operates only once and then
286 requires complete or partial replacement
287 Note 1 to entry: When such parts can be tested separately, they are considered to be thermal links within the scope
288 of IEC 60691.
289 Note 2 to entry: The ageing period and thermal response of the device is dependent on the intended use of the
290 device. As a result, the nature of the testing applicable to the device is representative of the application conditions
291 for which the protective control is intended (see 7.2).
292 Note 3 to entry: Non-bimetallic SODs provide the equivalent of micro-disconnection.
294 3.2.102
295 room thermostat
296 independently mounted or incorporated thermostat intended to control the temperature of
297 habitable space
298 3.2.103
299 boiler thermostat
300 thermostat intended to control boiler/liquid temperature
301 3.2.104
302 voltage maintained thermal cut-out
303 thermal cut-out which is maintained in its operated condition by the voltage which appears
304 across it in that condition
305 3.2.105
306 agricultural thermostat
307 thermostat intended for use in agricultural confinement buildings
309 3.3 Definitions relating to the function of controls
310 Additional definition:
311 3.3.101
312 time factor
313 transient response of temperature sensing controls by defined change of the activating
314 quantity
316 3.5 Definitions of types of control according to construction
317 Add the following new definitions
318 3.5.101
319 push-and-turn actuation
320 two-step actuation accomplished by first pushing, then rotating the actuating member of the
321 control
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -11- 72/1428/CDV
322 3.5.102
323 pull-and-turn actuation
324 two-step actuation accomplished by first pulling, then rotating the actuating member of the
325 control
326 4 General
327 This clause of Part 1 is applicable except as follows
328 4.3 General notes on tests
329 4.3.2 Conditions of test
330 Additional subclauses:
331 4.3.2.101 For the purposes of the tests of this standard and unless otherwise indicated, ambient
332 temperature excursions beyond T during abnormal operation as a precursor to
max
333 the operation of a manual reset thermal cut-out or a bimetallic SOD are ignored.
334 4.3.2.102 For manual reset thermal cut-outs and bimetallic SODs which have an operating
335 value above T , the temperature at the sensing element is raised, as necessary, to achieve
max
336 any cycling required during the tests.
337 4.3.3 Samples required
338 4.3.3.1 Addition:
339 Six samples of bimetallic SODs are used for the test of Clause 17 and a further six for the test
340 of Clause 19.
341 5 Required technical information
342 This clause of Part 1is applicable except as follows:
343 5.2 Methods of providing technical information
344 Table 1 – Required technical information and methods of providing these information
Clause or
Information Method
subclause
Modifications:
Addition:
101 Maximum sensing element temperature (other than relevant to 16.101 X
requirement 105)
- Controls for use in or on cooking appliances
- Controls for use in or on ovens of the self-cleaning type
- Conrols for use in or on food-handling appliances
- Controls having parts containing liquid metal
102 Time factor with or without sheath 3.3.101 X
9.101
BB.2.2
103 3.2.101 X
SOD reset temperature (either –35 °C or 0 °C)
9.4.103
19.15.107.1.2
19.15.107.1.5
104 Number of cycles for bimetallic SOD with 0 °C reset X
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -12- 72/1428/CDV
Clause or
Information Method
subclause
105 19.15.105 D
Maximum sensing element temperature in ℃ of controls used in self-
cleaning ovens (T )
e
Controls having parts containing liquid metal
106 20.102 D
107 Tensile yield strength 9.1.101 X
108 Minimum current for the purpose of the test of 23.2.2 23.2.2 D
109 T is the maximum ambient temperature in which the control may remain 16.4.101 D
max.1
continuously in the operated condition so that Table 17 temperatures are not
exceeded
110 Time period t is the maximum time during which the ambient temperature 16.4.101 D
can be higher than T after the control has operated
max.1
111 Temperature limit above which automatic reset of a manual reset thermal cut- 3.2.104 X
out or a voltage maintained thermal cut-out shall not occur (not higher than 9.4.106
–20 °C) 19.15.106
112 For type 2.P controls, the method of test 19.101 X
The click rate N or switching operations per minute for the purposes of
113 23 X
testing to CISPR 14-1
114 Rated functioning temperature (T ) of the sensing element, which 19.15.107.2 C
f
causes a non-bimetallic SOD to change state of conductivity
105,107
19.15.107.2.2
115 Ageing temperature for non-bimetallic SOD D
106,107
19.15.107.2.2
116 Rate of rise of temperature for testing non-bimetallic SOD D
117 Agricultural thermostat 3.2.105 D
9.4.107
9.6.3.101
Annex DD
Additional notes:
101)
This declaration applies only to temperature sensing controls containing liquid metal. For temperature
sensing controls used in or on self-cleaning ovens, this declaration is the temperature for the cooking
operation.
102)
Metal is an inclusive term that encompasses chemically metallic elements such as sodium (Na), potassium
(K), and others. Mercury (Hg) is generally not allowed.
103)
When no minimum is declared, the test value is 15 mA.
104)
Consideration should be given to the provision of information by the equipment manufacturer relating to the
minimum time that the appliance has to be disconnected from the supply to allow a voltage maintained thermal
cut-out to reset.
105)
Determined by the control manufacturer based on the opening temperature of the thermal-cut-out.
106)
Determined by the control manufacturer referring to the actual maximum rate of rise probable in the
projected end-use equipment.
107)
Non-bimetallic SODs are limited for use in appliances for heating or employing liquids or steam. They are
not suitable for instantaneous water heaters and storage water heaters
348 5.3 Class II symbol
349 This clause of Part 1 is applicable except as follows:
350 5.3.1 Addition:
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -13- 72/1428/CDV
351 The symbol for class II shall be used on controls of class II integrated or incorporated in an
352 assembly utilizing a non-electrical energy source.
353 6 Protection against electric shock
354 This clause of Part 1 is applicable.
355 7 Provision for protective earthing
356 This clause of Part 1 is applicable.
357 8 Terminals and terminations
358 This clause of Part 1 is applicable.
359 9 Constructional requirements
360 This clause of Part 1 is applicable except as follows:
361 9.1 Materials
362 Additional subclauses:
363 9.1.101 Parts containing liquid metal
364 Controls containing liquid metal declared under Table 1, requirement 106, and parts of any
365 control that contain sodium (Na), potassium (K), or both, shall be constructed of metal that has
366 a tensile yield strength at least four times the circumferential (hoop) or other stress on the parts
367 at 1,2 times the maximum temperature of the sensing element (T ) in ℃.Compliance is checked
e
368 by inspection of the manufacturer's declaration and by the test of 20.102.
369 9.1.102 Material for non-bimetallic SODs
370 Insulating material used in non-bimetallic SODs as defined in this standard shall comply with
371 the requirements of IEC 60216-1 and be suitable for the application.
372 9.3 Actuation and operation
373 9.3.9 Pull-cord actuated control
374 Addition:
375 NOTE 101 The Note is not applicable to controls classified as type 1.X or 2.X or type 1.Z or 2.Z.
376 9.4 Actions
377 9.4.3 Type 2 action
378 Addition:
379 Capacitors shall not be connected across the contacts of a thermal cut-out.
380 Constructions requiring a soldering operation to reset thermal cut-outs are not permitted.
381 9.4.11 Type 1.H or 2.H action (a trip-free mechanism in which the contacts cannot be
382 prevented from opening and which can automatically be reset to the "closed"
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -14- 72/1428/CDV
383 position after normal operation conditions have been restored if the reset
384 means is held in the "reset" position)
385 Replace the compliance criteria by the following:
386 Compliance is checked by inspection and by the tests as given in 9.4.11.101 to 9.4.11.106 .
387 Additional subclauses:
388 9.4.11.101 For this test, the reset mechanism of the control will be held in the reset position
389 for the duration of the test from 9.4.11.102 to 9.4.11.104 . The verification of the automatic
390 non-resetting above –35 °C will be carried out by 9.4.11.105 to 9.4.11.106 . For SOD, the
391 verification of the automatic non-resetting above either +0 °C or –35 °C will be carried out by
392 9.4.11.105 to 9.4.11.106 , as declared in item 103 of Table 1.
393 9.4.11.102 With the reset mechanism held in the reset position at room temperature, continuity
394 across contacts is observed by a low-energy circuit, 0,05 A maximum.
395 9.4.11.103 The control’s sensing element is then installed in an air circulating chamber or an
396 liquid bath and the control’s switch head is installed as in 16.5 a). When the whole control is
397 declared as the sensing element, the whole control is placed in an air-circulating chamber.
398 The control or the control’s sensing element is adjusted for the maximum set point
399 temperature. The chamber or liquid bath temperature shall be determined by positioning a
400 thermocouple wire adjacent to the control under test. The chamber or liquid bath temperature
401 is then raised from room temperature and held at approximately 10 K below the set point until
402 temperatures stabilize. The chamber or liquid bath temperature is then raised at a rate of not
403 more than 0,5 K per minute until the contact operates. Indication of contact separation is
404 observed by applying the method of 9.4.11.104 .
405 9.4.11.104 After the control has operated and with the reset mechanism still held in the reset
406 position, the temperature of the chamber or liquid bath is then reduced to determine if the
407 control automatically resets. Verification of contact closure is done by applying the method in
408 9.4.11.102.
409 9.4.11.105 The whole control or the control’s sensing element is then installed in an air
410 circulating chamber or liquid bath again and the control’s switch head (if applicable) is
411 installed as in 16.5 a) with the reset mechanism in its normal condition. The chamber or liquid
412 bath temperature shall be determined by positioning a thermocouple wire adjacent to the control
413 under test. The chamber or liquid bath temperature is raised from room temperature and held
414 at approximately 10 K below the set point until temperatures stabilize. The chamber or liquid
415 bath temperature is then raised at a rate of not more than 0,5 K per minute until the contact
416 operates. Indication of contact separation is observed by applying the method of 9.4.11.102 .
417 9.4.11.106 After the control has operated, the temperature of the chamber is allowed to cool
418 down to either +0 °C or –35 °C. Indication of contact separation is observed by applying the
419 method of 9.4.11.102.
420 9.4.12 Type 1.J or 2.J action (a trip-free mechanism in which the contacts cannot be
421 prevented from opening and the control is not permitted to function as an
422 automatic reset device if the reset means is held in the "reset" or "on" position)
423 Replace the compliance criteria by the following:
424 Compliance is checked by inspection and by the tests as given in 9.4.12.101 to 9.4.12.106 .
425 9.4.12.101 For this test, the reset mechanism of the control will be held in the reset position
426 for the duration of the test from 9.4.12.102 to 9.4.12.104. The verification of the automatic non-
427 resetting above –35 °C will be carried out by 9.4.12.105 to 9.4.12.106. For SOD, the verification
IEC CDV IEC 60730-2-9 ED5 © IEC 2024 -15- 72/1428/CDV
428 of the automatic non-resetting above either +0 °C or –35 °C will be carried out by 9.4.12.105 to
429 9.4.12.106, as declared in item 103 of Table 1.
430 9.4.12.102 With the reset mechanism held in the reset position at room temperature, contact
431 separation is observed by a low-energy circuit, 0,05 A maximum.
432 9.4.12.103 The control’s sensing element is then installed in an air circulating chamber or
433 liquid bath and the control’s switch head is installed as in 16.5. When the whole control is
434 declared as the sensing element, the whole control is placed in an air-circulating chamber.
435 The control or the control’s sensing element is adjusted for the maximum set point
436 temperature. The chamber or liquid bath temperature shall be determined by positioning a
437 thermocouple wire adjacent to the control under test. The chamber or liquid bath temperature
438 is raised from room temperature and held at approximately 10 K below the set point until
439 temperatures stabilize. The chamber or liquid bath temperature is then raised at a rate of not
440 more than 0,5 K per minute until 10 K over the operation temperature. Indication of contact
441 separation is still observed by applying the method of 9.4.12.102 .
442 9.4.12.104 After the control has operated and with the reset mechanism still held in the reset
443 position, the temperature of the chamber or liquid bath is then reduced to determine if the
444 control automatically resets. Verification of contact closure is done by applying the method in
445 9.4.12.102 .
446 9.4.12.105 The whole control or the control’s sensing element is then installed in an air
447 circulating chamber or liquid bath again and the control’s switch head (if applicable) is
448 installed as in 16.5. with the reset mechanism in its normal condition. The chamber or liquid
449 bath temperature shall be determined by positioning a thermocouple wire adjacent to the
450 control under test. The chamber or liquid bath temperature is raised from room temperature
451 and held at approximately 10 K below the set point until temperatures stabilize. The chamber
452 or liquid bath temperature is then raised at a rate of not more than 0,5 K per minute until the
453 contact operates. Indication of contact separation is observed by applying the method of
454 9.4.12.102 .
455 9.4.12.106 After the control has operated, the temperature of the chamber or liquid bath is
456 allowed to cool down to either +0 °C or –35 °C. Indication of contact separation is observed by
457 applying the method of 9.4.11.102.
458 9.4.13 Type 1.K or 2.K action (for sensing actions, no increase in the operating value
459 as the result of a breakage in the sensing element, or in parts connecting the
460 sensing element to the switch head)
461 Additional subclauses:
462 9.4.13.101 A type 2.K action shall be so designed that in the event of a break in the sensing
463 element, or in any other part between the sensing element and the switch head, the declared
464 disconnection or interruption is provided before the sum of the declared operating value an
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...