AS NZS 60335.2.51:2020 pdf free
AS NZS 60335.2.51:2020 pdf free.Household and similar electrical appliances – Safety
This International Standard deals with the safety of electric stationary circulation pumps for household and similar purposes intended for use in heating systems or in service water systems, their rated voltage being not more than 250 V for single-phase appliances and
480 V for other appliances.
NOTE 101 The hydraulic and electrical parts of the pump can be in the same enclosure, so that the water flows through 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 of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.
As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account.
The water temperature at the inlet is maintained between 0 °C and -5 °C of the value corresponding to the TF class of the pump.
For circulation pumps intended to be located within the enclosure of a boiler, the tests of Clauses 10,11 and 13 are carried out at an ambient temperature of 55 °C or at the temperature specified in the instructions, whichever is higher.
Circulation pumps having a three-phase motor that does not incorporate a protective device are installed with an appropriate device, in accordance with the instructions.
Circulation pumps that are only fixed by the water pipes are positioned against one wall of the test corner and away from the other.
The temperatures ty and t2 are the ambient temperatures of the environment in which the pump is installed, for instance inside the enclosure of a boiler.AS NZS 60335.2.51 pdf free download.
