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any direction shall have no harmful

effects.

minute

Prepssure:30 kPa at distance of3m

6 Power fulwater jets

Water projected in powerful jets(12.5 mm nozzle) against the

enclosure from any direction shallhave no harmful effects.

Test duration: at least 3 minutesWater volume:100 litres per

minutePrepssure: 100 kPa at a distance

of 3 m

7 Immersion up

to 1 m

Ingress of water in harmful quantity

hall not be possible when theenclosure is immersed in water

under defined condtions of pressureand time (up to 1 m of submersion).

Test duration: 30 minutes

Immersion at depth of at lest 1 mmeasured at bottom of device,

and at least 15 cm measured attop of device

8 Immersionbeyond 1 m

The equipment is suitable forcontinuous immersion in water

under conditions which shall be

specified by the manufacturer.Normally, this will mean that thequipment is hermetically sealed.

However, with certain types ofequipment, it can mean that water

can enter byt onloy in such amanner that it produces no harmful

effects.

Test duration: continuousimmersion in water

Depth specified by manufacturer

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Duty cycle of motor:

IEC (the International Electrotechnical Commission) uses eight duty cycle designations to

describe an electrical motors operating conditions:

S1 Continuous duty The motor works at a constant load for enough time to reachtemperature equilibrium

S2 Short time duty The motor works at a constant load, but not lond enough toreach temperature equilibrium. The rest periods are long

enough for the motor to reach ambient temperature

S3 Intermittent periodic

duty

Sequential, identical run and rest cycles with constant load.

Temperature equilibrium is never reached. Stating current haslittle effect on temperature rise.

S4 Intermittent periodic

duty with stating

Sequential, identical start, run and rest cyckles with constant

load. Temperature equilibrium is not reached, but startingcurrent affects temperature rise.

S5 Intermittent periodicduty with electric

braking

Sequential, identical cycles of starting, running at constant loadand running with no load. No rest periods.

S6 Continuous operation

with intemittent load

Sequential, identical cycles of running with constant load and

running with no load. No rest periods.

S7 continuous operation

with electric braking

Sequential identical cycles of starting, running at constant load

and electric braking. No rest periods

S8 Continuous operation

with periodic changes inload and speed

Sequential, identical duty cycles run at constant load and given

speed, then run at other constant loads and speeds. No restperiods.

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Cooling methods of motor: (IC Index of cooling )