ENDRESS Power generator aggregates catalogue Page 12
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Interesting and worth knowing Electrical safety All mobile generators are designed as standard in the protection measure with a circuit breaker with potential equalisation. They fulfil the requirements according to DIN EN 12601. No earthing is necessary for this protection measure. IP _ - 0 1 2 3 4 5 _ 0 Unprotected 1 Dripping water, vertical 2 Dripping water, diagonal to 15° from the vertical 3 Spray water diagonally up to 60° of the vertical 4 Splashed water, from all directions 5 Water jet, from all directions - Unprotected - Foreign objects > 50 mm - Foreign objects > 12 mm - Foreign objects > 2.5 mm - Foreign objects > 1.0 mm - Dust protected The FI protection switch (RCD) The FI circuit breaker provides further protection against dangerous currents. It shuts off the power supply if there is fault current. This protection measure requires appropriate earthing in which the earthing spike is connected to the generator’s earthing screw for potential equalisation by an earthing cable. This is how a potential equalisation is created. Safety-separated circuit - insulation monitoring with shut-off. The appliances turn themselves off automatically if the insulation resistance reaches a critical level. The insulation monitoring function is controlled from a test button. Costly earthing with an earthing spike and earthing cable are no longer necessary. This equipment provides a high level of safety, especially in underground construction such as work on gas and water mains (moist environments). It is even obligatory for pipeline construction according to DVGW GW 308. IP = International Protection according to DIN 40050 The IP code consists of two digits that indicate the specific degree of protection. The first digit indicates the protection class for touch and foreign object protection, and the second indicates water and moisture protection. Appliances in a nutshell Ohmic appliances (active load appliances) Universal engines, which basically act as active load consumers These are consumers that convert their power input completely into heat or light and therefore they do not present problems for any generator. The listed output power (watts) is also the input power that is taken from the generator. Such appliances include heating devices and hot plates. Inductive consumers These are appliances that are driven by an electric motor. With these inductive devices, friction losses and winding losses result in only about 70% of the input power being available as output power. Additionally, when the motor is turned on, more power is needed. Depending on the type of device and the motor’s quality, this can be 3 to 6 times the input power. Such appliances include compressors, table saws and high-pressure cleaners. Capacitive appliances These include critical consumers that, due to their charging function, can be powered safely by specially equipped DUPLEX or synchronous generators. They include flashers or discharge lamps. The right generator for your application To determine the right generator for your use more easily, you will find the applications in each model’s table. On pages 40 - 41, you will find detailed selection assistance on appliances and the generators that go with them. The starting power of the Endress generator (3 to 4 times the continuous power value) and the corresponding appliance’s starting current are already figured in. That can be helpful! To determine the appliance power - see the model plate or user manual. Consider reserve power in order to be equipped for future applications. Recommendation: it remains 10% under the continuous power output. That preserves the environment and the generator. 12
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