Bosch High-frequency production tools professional blue Page 51
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The distributor network The illustrations should be read as follows: The distributor network must not have any connec- Fig. 8: tions to the existing 50 Hz supply network. For this Cable cross-section in relation to voltage reason, special CEE plug connections as per and cable length DIN 49462/63 and DIN 49465 are also prescribed With the value of the powers to be transferred, you for frequencies between 100 and 300 Hz. find the type of current and go from left to right horizontally until you meet the intersection with the line The housing colour of the plugs, coupling and wall for the voltage. From there, you go down vertically un- sockets is green. The different design of these plug til you meet the intersection with the line for the cable connections guarantees that existing 50 Hz plug con- length (straight length) and then horizontally again to nections can be combined neither with plugs nor with the left or right. STRAIGHT GRINDERS Guide | High-frequency technology | 51 coupling sockets. Depending on requirements, movable or fixed cables ANGLE GRINDERS can be used for the distributor network between the frequency converter and the individual high-frequency tools. The transfer of greater powers at low voltage is uneconomical in widely ramified systems. Either high installation costs are incurred due to the until the operating location of the tool. In light of the prerequisite for constant transfer capacity, defined voltage drop and consistent cable length, the change of the cable cross-section is square to the voltage, i.e. half of the voltage results in four times the conductor cross-section. The required cross-sections of the distribution net- ACCESSORIES required, which do not reduce the higher voltage Power to be transferred at three-phase current large conductor cross-sections or transformers are work can easily be determined using illustrations 8 to 10. The conductor cross-sections are calculated subject to the permitted voltage drop of 5% len gt h from the ohmic resistance, the permitted heating HIGH-FREquENCy TECHNOLOGy St ra igh tc ab le and the voltage drop from the inductive resistance. Fig. 8
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