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What is the protection class? What do the different IP ratings mean?

Answer

The IP (INGRESS PROTECTION) rating system was drafted by the IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION) to classify electrical appliances according to their characteristics of dustproof, protection from foreign objects (including tools, human fingers, etc., which cannot touch the electrically charged parts of the appliance to avoid electric shock.

IP protection level is composed of two numbers, the first number indicates the level of dust-proof and foreign object-proof of the appliance, and the second number indicates the level of moisture-proof and water-proof of the appliance, the larger the number, the higher the protection level.

IP Dust Control, Meaning of the 1st digit.

Digital Protection range Description

0

Unprotected No special protection against outside people or objects

1

Prevents the intrusion of solid foreign objects larger than 50 mm in diameter Prevent the human body (such as the palm of the hand) from accidentally coming into contact with the internal parts of the appliance, and prevent the intrusion of foreign objects of larger size (diameter greater than 50 mm)

2

Prevents the intrusion of solid foreign objects larger than 2.5 mm in diameter Prevent human fingers from touching the internal parts of the appliance and prevent the intrusion of foreign objects of medium size (diameter greater than 12.5mm)

3

Prevents the intrusion of solid foreign objects larger than 2.5 mm in diameter Prevent tools, wires and similar small foreign objects with a diameter or thickness greater than 2.5 mm from intruding and coming into contact with the internal parts of the appliance

4

Prevents the intrusion of solid foreign objects larger than 1.0mm in diameter Prevent tools, wires and similar small foreign objects with a diameter or thickness greater than 1.0mm from intruding and coming into contact with the internal parts of the appliance

5

Protection from foreign objects and dust Completely prevent the intrusion of foreign objects, although not completely prevent the intrusion of dust, but the amount of dust intrusion will not affect the normal operation of electrical appliances

6

Protection from foreign objects and dust Completely protected from foreign objects and dust

 

IP waterproof, meaning of the 2nd digit:

Digital Protection range Description

0

Unprotected No special protection against water or moisture

1

Prevents water droplets from soaking in Vertical falling water droplets (e.g. condensation) do not cause damage to appliances

2

Tilted at 15 degrees, still prevents water droplets from soaking in When the appliance is tilted from vertical to 15 degrees, dripping water will not cause damage to the appliance

3

Prevent sprayed water from soaking in Rainproof or prevent damage caused by water sprayed in the direction of the vertical angle of less than 60 degrees into the appliance

4

Prevent splash water from soaking in Prevents damage to appliances caused by water splashing in all directions

5

Prevents water immersion from jets Prevents damage to appliances caused by water coming from all directions from the nozzle

6

Preventing large wave immersion Electrical appliances immersed in water for a certain period of time or water pressure below a certain standard can ensure that no damage is caused by water immersion

7

Prevent water immersion during submersion Electrical appliances immersed in water for a certain period of time or water pressure below a certain standard can ensure that no damage is caused by water immersion

8

Prevent water immersion during sinking Electrical appliances are submerged indefinitely under the specified water pressure, which ensures that no damage is caused by water immersion
Ask

What is the motor operating system and what do S1, S2 and S3 mean?

Answer

The operating system of a motor indicates the permissible cycle time of the motor under different loads.

The working system of motor is:S1~S10; where: The classification of working system of motor is the description of motor under load, it includes starting, electric braking, no-load, stopping and the duration and sequence of these stages, the working system is divided into the following 10 categories:

1.S1 continuous duty system: operation under constant load for a period of time sufficient to achieve thermal stability.

2.S2 Short-time working system: operating under constant load for a given time, the time is not enough to reach thermal stability, and then that is, the break can be stopped for a sufficient period of time, so that the motor cools again to the difference in temperature with the cooling medium within 2K.

3.S3 intermittent cycle work system: according to a series of the same work cycle operation, each cycle includes a period of constant load running time and a period of intermittent stopping time. This working system in each cycle of the starting current does not have a significant impact on the temperature rise.

4.S4 including the start of the intermittent cycle work system: according to a series of the same work cycle operation, each cycle includes a period of temperature rise has a significant impact on the start time, a period of constant load running time and a period of disconnected energy stopping time.

5.S5 intermittent cycle operating system including electric braking: operating in a series of the same work cycle, each cycle includes a period of starting time, a period of constant load running time, a period of fast electric braking time and a period of broken energy stopping time.

6.S6 continuous cycle operation system: according to a series of the same work cycle, each cycle includes a period of constant load running time and a period of no-load running time, but no break energy stop time.

7.S7 continuous cycle operating system including electric braking: operating in a series of the same working cycles, each cycle includes a period of starting time, a period of constant load running time and a period of fast electric braking time, but no break energy stopping time.

8.S8 continuous cycle operating system including variable speed variable load: operating in a series of identical duty cycles, each cycle including a period of constant load running time at a predetermined speed, and a period or periods of other constant load running time at different speeds, but no break energy stopping time.

9.S9 Non-periodic load and speed variation operating system:Non-periodic operating system in which the load and speed vary within a permissible range. This operating system includes frequent overloads, the value of which can far exceed the full load.

10.S10 discrete constant load operating system: including no less than four discrete load values (or equivalent loads) of the operating system, each load should operate for a period of time sufficient to bring the motor to thermal stability, and the minimum load value in an operating cycle may be zero.

Work system type in addition to the corresponding code S1 ~ S10 for the sign, should also comply with the following provisions:

For S2 working system, the working time limit should be added after the code S2; S3 and S6 working system, the load duration rate should be added after the code. For example: S2 - 60min, S3 - 25%, S6 - 40%. For S4 and S5 working system, load duration, motor inertia Jm and load inertia Jext should be added after the code,

The rotational inertia is the value attributed to the motor shaft. For S7 working system, the rotational inertia of the motor Jm and the rotational inertia of the load should be added after the code, and the rotational inertia of the load are the values attributed to the motor shaft. For S10 working system, the code should be followed by the nominal value of the corresponding load and its duration.

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Suzhou SOK Micro Motor Manufacturing Co.,Ltd. 

Address:No1,North Guandu Road,Wangshan Ind.Park,Wuzhong Dist.Suzhou.Jiangsu Province.China.
Phone:
0086-512-6655-8363    0086-512-6655-8828 
Tel:
0086-0-152-6197-0606    +86 15150186443
E-mail:sales.manager@sokmotor.cn   sales3@sokmotor.cn

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