Jul,14

AS NZS 60335.2.51 pdf download – Household and similar electrical appliances—Safety Part 2.51: Particular requirements for stationary circulation pumps for heating and service water installations

AS NZS 60335.2.51 pdf download – Household and similar electrical appliances—Safety Part 2.51: Particular requirements for stationary circulation pumps for heating and service water installations

AS NZS 60335.2.51 pdf download Household and similar electrical appliances—Safety Part 2.51: Particular requirements for stationary circulation pumps for heating and service water installations
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric stationary circulation pumps forhousehold and similar purposes intended for use in heating systems or in service watersystems,their rated voltage being not more than 250 V for single-phase appliances and480 v for other appliances.
NOTE 101 The hydraulic and electrical parts of the pump can be in the same enclosure, so that the water flowsthrough the motor and serves as a coolant, or they can be separated.
Appliances not intended for normal household use, but that nevertheless may be a source ofdanger to the public,such as appliances intended to be used by laymen in shops, in lightindustry and on farms, are within the scope of this standard.
As far as is practicable,this standard deals with the common hazards presented byappliances that are encountered by all persons in and around the home.However, in general,it does not take into account
-persons (including children) whose
. physical, sensory or mental capabilities; or. lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;- children playing with the appliance.
NOTE 102Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can benecessary;
in many countries additional requirements are specified by the national health authorities, the nationalauthorities responsible for the protection of labour and similar authorities.
NOTE 103 This standard does not apply to
– pumps for circulating liquids other than water;
pumps,other than circulation pumps (IEC 60335-2-41);
circulation pumps intended exclusively for industrial purposes;
circulation pumps intended to be used in locations where special conditions prevail, such as the presence of acorrosive or explosive atmosphere (dust, vapour, or gas)-
2Normative references
This clause of Part 1 is applicable.
3Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1Definitions relating to physical characteristicsReplacement:
3.1.9
normal operation
operation of the circulation pump with the water pressure and flow rate adjusted within theirspecified limits, so that the highest power input is attained
4General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.5.7Addition:
The water temperature at the inlet is maintained between 0 C and -5 C of the valuecorresponding to the TF class of the pump.
For circulation pumps intended to be located within the enclosure of a boiler,the tests ofClauses 10,11 and 13 are carried out at an ambient temperature of 55 C or at thetemperature specified in the instructions, whichever is higher.
5.101 Circulation pumps having a three-phase motor that does not incorporate a protectivedevice are installed with an appropriate device, in accordance with the instructions.
6 Classification
This clause of Part 1 is applicable except as follows.6.1Modification:
Circulation pumps shall be class l, class ll or class lI.6.2Addition:
Circulation pumps shall be at least lPX2.
6.101 Circulation pumps shall be of one of the classes shown in Table 101.

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