IEC 60884-1 Figure 21 Plug Cord Flexibility Test Apparatus With 6
Station Button Control
Standard:
IEC 60884-1 'Plugs and socket-outlets for household and similar
purposes – Part 1: General requirements' clause 23.4, figure 21
Standard description:
Non-rewirable plugs and non-rewirable portable socket-outlets shall
be designed in such a way that the flexible cable is protected
against excessive bending where it enters the accessory.
Guards provided for this purpose shall be of insulating material
and shall be fixed in a reliable manner.
Compliance is checked by inspection and by a flexing test made by
means of an apparatus as shown in figure 21.
The test is made on new specimens.
The specimen is fixed to the oscillating member of the apparatus so
that, when it is at the middle of its travel, the axis of the
flexible cable, where it enters the specimen, is vertical and
passes through the axis of oscillation.
Specimens with flat cords are mounted so that the major axis of the
section is parallel to the axis of oscillation.
The accessory shall be fixed in the test apparatus in the following
way:
– plugs: by the pins;
– portable socket-outlets: at a distance of 4 mm to 5 mm in the
direction of the flexible cable, from the engagement face; a test
plug having the maximum dimensions shall be inserted in the
portable socket-outlet during the test.
The accessory is, by variation of the distance between the fixing
part of the oscillating member and the axis of oscillation,
positioned so that the flexible cable makes the minimum lateral
movement when the oscillating member of the test apparatus is moved
over its full travel.
The flexible cable is loaded with a mass such that the force
applied is
– 20 N for accessories with flexible cables having a nominal
cross-sectional area exceeding 0,75 mm 2 ;
– 10 N for other accessories.
A current equal to the rated current of the accessory or the
following current, whichever is the lower, is passed through the
conductors:
– 16 A for accessories with flexible cables having a nominal
cross-sectional area larger than 0,75 mm2;
– 10 A for accessories with flexible cables having a nominal
cross-sectional area of 0,75 mm2 ;
– 2,5 A for accessories with flexible cables having a nominal
cross-sectional area less than 0,75 mm2 .
The voltage between the conductors is equal to the rated voltage of
the specimen.
The oscillating member is moved through an angle of 90° (45° on
either side of the vertical), the number of flexings being 10 000
and the rate of flexing 60/min.
Specimens with circular section flexible cables are turned through
90° in the oscillating member after 5 000 flexings; specimens with
flat flexible cables are only bent in a direction perpendicular to
the plane containing the axes of the conductors.
During the flexing test, there shall be
– no interruption of the current,
– no short circuit between conductors.
After the test, the guard, if any, shall not have separated from
the body and the insulation of the flexible cable shall show no
sign of abrasion or wear; broken strands of the conductors shall
not have pierced the insulation so far as to become accessible.
Application:
This device is used for test the flexing properties of
non-rewirable plugs (terminals) and non-rewirable portable
socket-outlets, check the fatigue strength of the power cable and
jacket.
Test sample:
Non-rewirable plugs and non-rewirable portable socket-outlets
Feature:
The speed reducing motor controls the crank sliding block structure
to do the reciprocating motion, the left and right flexing angles
are adjusted by manual scale, and angle automatic adjustment touch
screen model can be customized.
Tester will automatic shutdown when preset test times completed.
Parameters:
| Power Supply | AC220V, 60Hz |
| Numbers of Test Stations | 6, with 6 sets of clamps |
| Numbers of flexing times | 1-999999 (adjustable). With 6 independent counters corresponding to
each station, and there is a general counter |
| Rate of Flexing | 10~60 rpm (adjustable) |
| Flexing Angles | Swivel angle on either side for 45°, 60°, 90° |
| Sample connecting wires | 6 PCS |
| Weights | 10N/20N*6(the weight of UL113g and 284g) |
| Breaking indication | Indicator display |
| Dimensions | L*W*H=870mm *610mm* 820mm |
Mechanical theory | The crank block on the reduction gearbox is driven by the electric
motor to do the reciprocating action. |
