B.28.1
The values specified in Table 10 do not apply to distances between live parts of the motor and its other metal parts.
Parallel circuit Series circuit
D
B
Cp A
C
M
B
Cp A
C
M
IEC 558/01 IEC 559/01
Components
___ original connection – – – short circuit
≈ open circuit
A short circuit of the terminals of the motor B short circuit of the terminals of the rectifier C open circuit of the supply to the motor D open circuit of the shunt resistor
Figure B.1 – Simulation of defects
Annex C Void
Annex D Void
Annex E Void
Annex F (normative) Needle-flame test
The needle-flame test is made in accordance with IEC 60695-11-5.
For the purpose of this standard, the following modifications to clauses and subclauses of IEC 60695-11-5 apply.
5 Description of the test apparatus
5.4 Specified layer
The first paragraph is replaced by:
In cases where burning or glowing particles might fall from the specimen onto an external surface underneath the tool, the test is made with a piece of white pine-wood board, approximately 10 mm thick, and covered with a single layer of tissue paper, positioned at a distance of 200 mm ± 5 mm below the place where the test flame is applied to the specimen.
If the tool as a whole is tested, it is placed in its normal position of use above the pine-wood board, which is covered with a single layer of tissue paper.
7 Severities
The duration of application of the test flame is 30 s.
9 Test procedure
Replace the text of 9.3 by:
9.3 Number of test specimens
The test is made on one specimen. If the specimen does not withstand the test, the test is repeated on two further specimens, both of which shall then withstand the test.
11 Evaluation of test results
Add:
When a layer of tissue paper is used, there shall be no ignition of the tissue paper, or scorching of the white pine-wood board; a slight discoloration of the white pine-wood board being neglected.
Annex G (normative) Proof tracking test
The proof tracking test is made in accordance with IEC 60112.
For the purpose of this standard, the following modifications to clauses and subclauses of IEC 60112 apply.
5 Test specimen
The second paragraph, after NOTE 2, does not apply.
7 Test apparatus
The test solution A described in 7.3 is used.
8 Basic test procedure
The test voltage referred to in 8.2 is adjusted to 175 V or 250 V, as appropriate.
9 Determination of erosion
This clause does not apply.
10 Determination of proof tracking index (PTI)
The number of specimens is five.
11 Determination of comparative tracking index (CTI) This clause does not apply.
Annex H Void
Annex I (normative)
Switches
Switches which are tested with the tool shall comply with this standard and with the following clauses of IEC 61058-1, as modified.
Unless otherwise specified, the tests are carried out on the switch incorporated in the tool.
Before being tested in the tool, switches are operated 20 times without load.
8 Marking and documentation
Switches are not required to be marked, except that incorporated switches shall be marked with the manufacturer's name or trade mark and the type reference.
NOTE According to IEC 61058-1, an incorporated switch can be tested separately from the tool.
13 Mechanism This clause is applicable.
NOTE The tests may be carried out on a separate sample.
15 Insulation resistance and dielectric strength
15.1 The dielectric strength of switches shall be adequate.
Compliance is checked by the test of 15.3, the test being made immediately after the test of 14.3 of IEC 60745.
For mechanical switches, the test is carried out across full disconnection and micro- disconnection only.
For electronic switches, the test is carried out across full disconnection and micro- disconnection only on electronic switches with mechanical switching devices connected in series with the semiconductor switching device.
For electronic switches, the tests are not carried out across protective impedances and poles interconnected by components.
15.2 This subclause is not applicable.
17 Endurance
17.1.1 Addition:
Switches in the tool are considered to be for declared specific loads.
17.1.2 The sequence of tests for all switches except electronic switches is as follows:
− a test at accelerated speed as specified in 17.2.4.4;
− a temperature-rise test in accordance with 16.2, with the exception that the temperature- rise test at the terminals is carried out at rated current and in an ambient temperature of 25 °C ± 10 °C;
− a dielectric strength test in accordance with 15.3, with the exception that the specimens are not subjected to the humidity treatment before the application of the test voltage. The test voltage shall be 75 % of the corresponding test voltage specified in that subclause.
17.2.1.1 The switch shall be loaded at rated voltage under the conditions occurring in the tool.
Circuits and contacts which are not intended for external loads are operated with the designated load.
No electrical endurance tests are necessary for switches for 20 mA load as classified in 7.1.2.6.
NOTE For a specific lamp load, it is recommended that the specimen be operated with loads that are used in the field rather than with synthetic loads. Forced cooling of the specific lamp load may be applied in order to ensure cold resistance for each operating cycle and shorten the test time.
For electronic switches, the test circuit shall be as shown in Figure 19. The declared load shall be set at rated voltage before the electronic switch is inserted into the circuit.
17.2.1.2 This subclause is not applicable.
17.2.2.1 All tests are carried out at 25°C ± 10°C.
17.2.3.1 Items a) and b) are not applicable.
17.2.3.3 This subclause is not applicable.
17.2.3.4.2 This subclause is not applicable.
17.2.3.4.3 This subclause is not applicable.
17.2.4.1 This subclause is not applicable.
17.2.4.2 This subclause is not applicable.
17.2.4.3 This subclause is not applicable.
17.2.4.4 Test at accelerated speed (TC4)
For all switches except electronic switches, the electrical conditions are those specified in 17.2.1.
For electronic switches, the electrical conditions are those specified in Table 15.
The thermal conditions are those specified in 17.2.2.
The total number of operations shall be 50 000.
The method of operation is that specified for accelerated speed in 17.2.3.
17.2.4.9 This subclause is not applicable.
20 Clearances, creepage distances, solid insulation and coatings of rigid printed board assemblies
This clause is applicable for creepage distances and clearances for live parts of different potential only, for operational insulation and across full disconnection and micro- disconnection.
Annex J (informative)
Selection and sequence of the tests of Clause 29
Resistance to heat and fire
Tools
External parts of non- metallic material
Parts of insulating material supporting live parts, including connections
Thermoplastic material providing supplementary or
reinforced insulation
Other parts of non-metallic material
Ball pressure test
≥75 °C (29.1)
Ball pressure test
≥125 °C (29.1)
Ball pressure test ΔTmax + 40 K
(29.1)
Ball pressure test No requirements
Glow-wire test
550 °C IEC 60695-2-11
(29.2)
Resistance to tracking
Tools
Normal duty conditions Severe duty conditions Extra severe duty conditions
No tracking test Tracking test 175 V Annex G
Tracking test 250 V Annex G
Failure Failure Tracking test 175 V
Annex G Pass Needle-flame test on
surrounding parts Annex F
Annex K (normative)
Battery tools and battery packs