309 / 338
D-75
Additional information
Enclosure characteristics
Schneider Electric enclosures comply with standard IEC 62208, EN 50298 for empty
enclosures. The sheet metal used for Schneider Electric enclosures receives an
anti-corrosion epoxy electrophoresis treatment and a coating of a thermosetting,
polyester-resinmodified epoxy powder for colour and appearance.
This two-coat system provides excellent finish and corrosion protection.
The characteristics of this coating are much better than those of traditional epoxy
powders:
b
improved colour stability
b
wider operating temperature range.
Mechanical properties of enclosures
Static load on doors, wall-mounted and floor-standing enclosures and
cubicles
Cubicle
400 kg
Cubicle door
12 kg
Mechanical properties of powder coated surfaces
Test conditions
Test piece made of 1 mm thick steel sheet, degreased, iron phosphated, final
rinsing with 100 k
W
cm DI water, 15 microns of anti-corrosion
electrophoresis treatment and 35 microns of powder paint.
Adhesion (cross-hatch and pull-off)
class 0 required
(ISO 2409)
Impact strength
(1)
> 1 kg/50 cm
(ISO 6272)
Mandrel bending test
(2)
< 10 mm
(ISO 6860)
Persoz hardness
300 s
(ISO 1522)
(1)
No cracking of the paint film after dropping a weight of 1 kg on the test piece from
a height of 50 cm.
(2)
Film cracks over a length of 10 mm maximum.
Artificial ageing test on powder coating
Test conditions:
Two tests carried out on the same 1 mm thick steel sheet test piece.
b
cyclical damp-heat test:
vv
as per standard IEC 68-2-30
- six 24-hour cycles at temperatures higher than 40 °C
b
continuous resistance to neutral salt mist:
v
the tests were carried out over a period of 400 hours, far more than the 48 hours
required by the standard for indoor installations
vv
as per standard IEC 68-2-11 and ISO 7253
- 400 hours without blistering for normal surface on test piece
- 250 hours for a scratched surface.
Evaluation of corrosion as per ISO 4628:
bb
adhesion: class
y
1
bb
blistering: degree 1 dim.1
bb
rusting: Ri 1
bb
cracking: class 1
bb
flaking imp. 1 dim. 1
propagation of corrosion under scratch with respect to the scratch axis: 3 mm max.
Properties of metal enclosures