Intermittent operation S3
Non-intermittent periodic operation S6
P
P
V
t
t
t
J
t
S
t
L
t
B
P
P
V
t
t
t
J
t
S
t
L
t
B
Sequence of identical duty cycles comprising operation with a constant
load and subsequent standstill. Start-up and braking processes do not
have an impact on the winding temperature. The steady-state is not
reached. The guide values apply to a cycle duration of 10 minutes. The
power increase depends on the cycle duration and on the load period/
downtime ratio.
Sequence of identical duty cycles comprising operation with a constant
load and subsequent no-load operation. The motor cools down during
the no-load phase. Start-up and braking processes do not have an
impact on the winding temperature. The steady-state is not reached. The
guide values apply to a cycle duration of 10 minutes. The power increase
depends on the cycle duration and on the load period/idle time ratio.
P
Power
P
V
Power loss
t
Time
t
B
Load period
t
L
Idle time
t
S
Cycle duration
ϑ
Temperature
Enclosures
The protection class indicates the suitability of a product for specific ambient conditions with
regard to humidity as well as the protection against contact and the ingress of foreign
particles. The protection classes are classified in the EN 60034-5/ EN IEC 60529.
The first code number after the code letters IP indicates the protection against the ingress of
foreign particles and dust. The second code number refers to the protection against the
ingress of humidity.
Code number 1 Degree of protection
Code number 2 Degree of protection
0
No protection
0
No protection
1
Protection against the ingress of foreign particles d >
50 mm. No protection in case of deliberate access.
1
Protection against vertically dripping water (dripping
water).
2
Protection against medium-sized foreign particles,
d > 12 mm, keeping away fingers or the like.
2
Protection against diagonally falling water (dripping
water), 15 ° compared to normal service position.
3
Protection against small foreign particles d > 2.5 mm.
Keeping away tools, wires or the like.
3
Protection against spraying water, up to 60 ° from
vertical.
4
Protection against granular foreign particles, d > 1 mm,
keeping away tools, wire or the like.
4
Protection against spraying water from all directions.
5
Protection against dust deposits (dust-protected),
complete protection against contact.
5
Protection against water jets from all directions.
6
Protection against the ingress of dust (dust-proof),
complete protection against contact.
6
Protection against choppy seas or heavy water jets
(flood protection).
Appendix
Good to know
Enclosures
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