AS 60034.5 pdf download – Rotating electrical machines Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP Code)— Classification
The lower degree of protection of:
– guards for external fans (as allowed in 4.3);
– drain holes (as allowed in 4.4);
need not be specified on the rating plate or in the documentation.
Where the mounting of the machine has an influence on the degree of protection, the intended mounting arrangements shall be indicated by the manufacturer on the rating plate or in the instructions for mounting.
7 General requirements for tests The tests specified in this standard are type tests. They shall be carried out on standard products or models of them. Where this is not feasible, verification either by an alternative test or by examination of drawings shall be the subject of an agreement between manufacturer and user. Unless otherwise specified, the machine for each test shall be clean with all the parts in place and mounted in the manner stated by the manufacturer. In the case of both first and second characteristic numerals 1 , 2, 3 and 4, a visual inspection may, in certain obvious cases, show that the intended degree of protection is obtained. In such cases, no test need be made. However, in case of doubt, tests shall be made as prescribed in clauses 8 and 9.
7.1 Adequate clearance For the purpose of the following test clauses in this standard, the term ‘adequate clearance’ has the meaning given in 7.1 .1 or 7.1 .2. 7.1.1 Low-voltage machines (rated voltages not exceeding 1 000 V a.c. and 1 500 V d.c.) The test device (sphere, finger, wire, etc.) does not touch the live parts or moving parts other than non-dangerous parts such as smooth rotating shafts.
7.1.2 High-voltage machines (rated voltages exceeding 1 000 V a.c. and 1 500 V d.c.) When the test device is placed in the most unfavourable position, the machine shall be capable of withstanding the dielectric test applicable to the machine. This dielectric test requirement may be replaced by a specified clearance dimension in air which would ensure that this test would be satisfactory under the most unfavourable electrical field configuration.
8 Tests for first characteristic numeral Test and acceptance conditions for the first characteristic numeral are given in table 4. The dust test for numerals 5 and 6 shall be performed with the shaft stationary, provided that the difference in pressure between running and stationary (caused by fan effects) is lower than 2 kPa. If the pressure difference is greater than 2 kPa, the internal machine pressure during the dust test shall be depressed accordingly. Alternatively, the machine may be tested with the shaft rotating at rated speed.
9 Tests for second characteristic numeral
9.1 Test conditions Test conditions for the second characteristic numeral are given in table 5. The test shall be conducted with fresh water. During the test, the moisture contained inside the enclosure may be partly condensed. The dew which may thus be deposited should not be mistaken for an ingress of water.
For the purpose of the tests, the surface area of the machine shall be calculated with an accuracy of 1 0 %. When possible, the machine shall be run at rated speed. This can be achieved by mechanical means or by energization. If the machine is energized, adequate safety precautions shall be taken.
9.2 Acceptance conditions After the test in accordance with table 5 has been carried out, the machine shall be inspected for ingress of water and subjected to the following verification and tests:
9.2.1 The amount of water which has entered the machine shall not be capable of interfering with its satisfactory operation. The windings and live parts not designed to operate when wet shall not be wet and no accumulation of water which could reach them shall occur inside the machine.