Hi all,
We now have a new portable device which use non-detachable power supply cord. The test for the connection of power supply cord (including cord anchorage and cord bending test) is therefore needed to be performed.
I am new for above mentioned tests, since our equipments almost use IEC 60320 appliance inlet. That means cord anchorage and cord bending test can be waived.
For cord anchorage test, it is very clear. But for the cord bending test, I am confused. The standard states that immediately after the mass has been attached, the curvature of the cord shall nowhere be less than 1.5 D, being checked by a cylindrical rod with a diameter of 1.5 D.
As I know, the curvature is the smaller the better. But the standard requires the curvature shall be more than 1.5 D. Is this a mistake of the standard? I would think the curvature shall be replaced by radius of curvature. Because of the curvature is the reciprocal of the radius of curvature.
Also, I can not understand very well why the test is checked by a cylindrical rod with a diameter of 1.5 D. What the rationale is?
Furthermore, is a MAINS TERMINAL DEVICES must in this case? Can I solder the power cord directly onto the PCB or other components (e.g. switch/ lampholder)? If yes, whether additional fixed methods are required?
I am sorry for several questions. I did not have experience in the connection of power cord.
We now have a new portable device which use non-detachable power supply cord. The test for the connection of power supply cord (including cord anchorage and cord bending test) is therefore needed to be performed.
I am new for above mentioned tests, since our equipments almost use IEC 60320 appliance inlet. That means cord anchorage and cord bending test can be waived.
For cord anchorage test, it is very clear. But for the cord bending test, I am confused. The standard states that immediately after the mass has been attached, the curvature of the cord shall nowhere be less than 1.5 D, being checked by a cylindrical rod with a diameter of 1.5 D.
As I know, the curvature is the smaller the better. But the standard requires the curvature shall be more than 1.5 D. Is this a mistake of the standard? I would think the curvature shall be replaced by radius of curvature. Because of the curvature is the reciprocal of the radius of curvature.
Also, I can not understand very well why the test is checked by a cylindrical rod with a diameter of 1.5 D. What the rationale is?
Furthermore, is a MAINS TERMINAL DEVICES must in this case? Can I solder the power cord directly onto the PCB or other components (e.g. switch/ lampholder)? If yes, whether additional fixed methods are required?
I am sorry for several questions. I did not have experience in the connection of power cord.