Enclosure protection rating
IP ratings consist of the letters “IP” followed by two numbers. The first number indicates the degree of protection against foreign objects and dust access to hazardous parts. The second number indicates the degree of protection against water.
First digit - the degree of protection against foreign objects
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0x – no protection;
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1x - > Protected against any large part of the body such as the back of a hand, and solid foreign objects 50mm O and more. However no protection against deliberate contact.
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2x – Protected against fingers, pencils and other solid foreign objects 12 mm O and more
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3x - Protected against tools, thick wires and other solid foreign objects 2.5mm O and more
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4x - Protected against most wires, screws and other solid foreign objects 1mm O and more
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5x - Ingress of dust is not entirely prevented but dust shall not enter in sufficient quantity to interfere with the satisfactory operation of the equipment
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6x – Full dust protection.
Second digit - indicates the degree of protection against water.
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X0 – no protection
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x1 - Vertically falling drops of water shall have no harmful effect
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X2 - Vertically falling drops of water shall have no harmful effect when the motor is tilted up to 15° from its normal position
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x3- Water falling as a spray at angles up to 60° from the vertical shall have no harmful effect
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x4- Water splashed from any direction shall have no harmful effect
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x5 - Water projected from a nozzle from any direction shall have no harmful effect
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x6 – water projected in powerful jets from any direction shall have no harmful effect
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x7 – Ingress in water in harmful quantity shall not be possible when the motor is immersed in water
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x8 – The motor is suitable for continuous submersion in water under conditions which shall be specified by the manufacturer
(excerpt from IEC 529 (1976) international standard).
EC motor
The double-inlet impellers with forward curved blades are powered by high-efficient electronically commutated (EC) direct current external rotor motors. As of today such motor modification is the most state-of-the-art and progressive energy saving solution. EC motors are featured with high efficiency and the best control over the whole speed range.
Premium efficiency reaching 90% is the absolute privilege of electronically commutated.
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