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Oscillating Tubes Device
Product details: Model ZLT-DP
For checking the protection against water with spray nozzle of 0,4 mm bore are used to prove the degrees of protection for the second characteristic numerals 3 and 4 “Protection against Spraying Water” resp. “Protection against splashing Water”.
The protection against spraying water is determined by causing the oscillating tube to oscillate over the specimen through an angle of 60°on either side of the vertical each at a speed of about 60°per second, while the jets coming from a larger angle than 60°to the vertical are baffled by deflectors. But there is also a slightly amended regulation, according to which the oscillating tube with deflectors stands still in a vertical position, and the specimen is turned-for example on a turntable-at a convenient speed a vertical axis.
In order to determine the protection against splashing water, the oscillating tube is caused to oscillate through an angle of almost 180°on either side of the vertical at a speed of about 60°per second, while depending on regulation the specimen stands still or is turned at a convenient speed. Each of these tests lasts for example 10 minutes.
A complete test unit comprises a set of oscillating tubes as accessories, the oscillating appliance with the drive and-in the case of larger oscillating tubes-the opposite bearing. The oscillating tubes are manufactured with orifice radii of 200 mm to 1600 mm with a progressive ratio of 200 mm.
According to IEC60529 figure 4, IEC60598 clause 9.2.5, IEC60947.
1 oscillating appliance, with flanged shaft to screw on the oscillating tubes, height above floor 1400 mm, on request with a second flanged shaft as shown on figure,
1 drive by 750W servo motor, oscillating speed 60°/s, with frequency converter, swiveling angle sensor, swiveling angle limiting safety switch, electromagnetic brake, brake release switch, emergency stopping switch and watertight socket to connect a turntable,
1 water supply with fine filter to be cleaned by reverse flow, pressure regulator and pressure indicating instruments, adjustable flow regulating valve and flow indicating instrument, electromagnetic valve and rotary union to supply the water through the flanged shaft, prepared to connect a hose of nominal diameter 20 mm,
1 resp. 2 opposite bearings, with flanged shaft to screw on the oscillating tubes, wall fastening type, also available for floor fastening,
1 control system, with start and stop buttons, switches for water, oscillating drive and turntable drive, main switch and emergency stopping switch to be unlocked by key, rotary knob to adjust the swiveling angle infinitely from 60°to minimum 165°on either side of the vertical, feasibility to adjust the oscillating angle mid position, fuses and thermal excess current release.
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