Mastervolt Powerbook 2023 EN

Projected against a solid object greater than 50 mm such as a hand. Protected against vertically falling drops of water. Limited ingress permitted. Projected against a solid object greater than 12 mm such as a finger. Protected against vertically falling drops of water with enclosure tilted up to 15 degrees from the vertical. Limited ingress permitted. Projected against a solid object greater than 2.5 mm such a a screwdriver. Protected against sprays of water up to 60 degrees from the vertical. Limited ingress permitted for three minutes. Projected against a solid object greater than 1 mm such as a wire. Protected against water splashed from all directions. Limited ingress permitted. Dust protected. Limited ingress of dust permitted. Will not interfere with operation of the equipment. Two to eight hours. Protected against jets of water. Limited ingress permitted. Protection against the effects of immersion in water between 15 cm and 1 m for 30 minutes. Dust tight. No ingress of dust. Two to eight hours. Water from heavy seas or water projected in powerful jets shall not enter the enclosure in harmful quantities. Protection against the effects of immersion in water under pressure for long periods. SOLIDS WATER n High-frequency (HF) switch technology This technology allows incoming alternating current to be rectified into direct current over a diode bridge. The resulting DC voltage is chopped into parts with a high frequency by means of an electronic switch that is turned on and off quickly. This creates a simulated alternating current with a high frequency, 35 kHz (35,000 Hertz) for instance. This AC can be converted to a higher or lower voltage via a very small transformer. The higher the frequency, the smaller the transformer can be. Mastervolt uses HF switch technology in all its equipment, offering major benefits in terms of compactness, weight and efficiency. Another advantage is that you say goodbye to the irritating hum of a transformer. n Hydrogen gas Highly explosive gas mixture of hydrogen and oxygen formed during the charging of flooded batteries with an unsuitable charger. Extra ventilation prevents concentrations from becoming too high. n IEC approval The International Electrotechnical Commission (IEC) is headquartered in Geneva, Switzerland, and develops general standards for the safety of electrical components and equipment. Although it proposes standards, the IEC is not responsible for their enforcement, which is usually carried out by independent test laboratories. n Inductive loads These loads are, for example, the motors in air conditioning systems and diving compressors. They cause the current to flow out of phase with the voltage, a phenomenon also known as phase shift. The degree is indicated by a value, cos phi or power factor, which ranges from 0 to 1 and is inversely proportionate to the size of the lag. In a heating element (which is resistive load), current flows in step with voltage and cos phi is 1. In a motor, however, there will be a lag, as indicated by the typical value of 0.8 - or sometimes 0.6 - for cos phi. The lower the cos phi, the greater the lag, and the more current is necessary to supply a given level of power. TECHNICAL BACKGROUND I n Ingress Protection (IP) Ratings Guide The IP rating system was established by the International Electrotechnical Commission (IEC), an organization for international standards and conformity assessment. The IEC collaborates closely with the International Organization for Standardization (ISO). Although these ratings were initially developed as a way to classify enclosures, they now provide a convenient, practical way to compare levels of sealing. Many electrical products have an Ingress Protection (IP) rating which identifies the environmental factors needing consideration prior to the product’s installation. This is important when deciding when to mount products in a dry and clean environment versus a wet and/or dusty environment. The IP rating indicates the degree of protection provided. The numbers following IP represent levels of sealing and can range from no protection to full protection against dust and water. The table provides a description of the protection at each level. Example : An IP65 rating can be determined using the table. n The first number of the rating example, 6, in the gray column means the enclosure is dust tight. n The second number of the rating example, 5, in the blue column means the enclosure is protected against jets of water. 148