4 K factor Factor which defines an overload characteristic to which the fuse-link may be repeatedly subjected under specified motor starting conditions, and other specified motor-operating overloads, without deterioration. For the purpose of this specification, the value of K is chosen at 1 0 s. Unless otherwise stated by the fuse-link manufacturer, it is valid from 5 s to 60 s, for a frequency of starts up to six per hour and for not more than two consecutive starts. For conditions different from those specified above, for example where service conditions involve inching, plugging or more frequent starts, the manufacturer...

5.3 Method 2: stepwise tracking voltage Select a starting voltage, being a multiple of 250 V, such that failure according to criterion A of 5.4 (current exceeding 60 mA) does not occur sooner than the third voltage step (a preliminary trial test may be necessary). With the contaminant flowing uniformly at the specified rate, switch on and raise the voltage to the selected value. Maintain this voltage for 1 h and increase the voltage by a step of 250 V for each subsequent hour until failure by criterion A is recorded. As the voltage is increased the contaminant flow rate...

5.5 Adhesive tapes For adhesive tapes the method of Clause 7 of IEC 60454-2 is recommended. 5.6 Flexible sleeving and tubing Sleeving and tubing (both varnished fabric and extruded) are slit open, so as to make flat sheets, which can then be prepared as for films (see 5.4). 5.7 Lacquers and insulating varnishes The lacquer or insulating varnish to be tested shall be applied in the manner recommended by the manufacturer to the surface of a test specimen of shape as shown in Figure 1 and described in 5.2. The base material of the test specimen shall be a corrosion...

8.3 Type tests Clause 8.3 of IEC 60358-1 :201 2 is applicable with the following additions: 8.3.300 8.3.300.1 Type tests for filter capacitor and tuning device Type tests for filter capacitor a) High frequency capacitance and equivalent series resistance (1 0.300.1 ) b) Measurement of the stray capacitance and stray conductance of the low voltage terminal (1 0.300.2) 8.3.300.2 Type tests for tuning device a) Impulse voltage test (1 0.301 .1 ) 10.300 10.300.1 Test on capacitor High frequency capacitance and equivalent series resistance The measurements shall be carried out on a capacitor stack or on a capacitor unit. The...

2 Normative reference The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 6031 7-0-2:201 3, Specifications for particular types of winding wires – Part 0-2: General requirements – Enamelled rectangular copper wire 3 Terms, definitions, general notes, and appearance 3.1 Terms and definitions Subclause 3.1 of IEC 6031 7-0-2:201 3 applies. 3.2 General notes 3.2.1 Methods of test Subclause 3.2.1 of IEC 6031 7-0-2:201 3 applies....

1 Scope This part of IEC 6031 7 specifies the requirements of enamelled round copper winding wire of class 1 80 with a dual coating. The underlying coating is based on polyesterimide resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The superimposed coating is a bonding layer based on a thermoplastic resin. NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics. The range of nominal conductor diameters covered by this...

18 Heat or solvent bonding 18.1 Heat bonding 18.1.1 Heat bonding strength of a helical coil 18.1.1.1 At room temperature The specimens shall be prepared according to the test method, and the temperature of the oven for bonding shall be fixed as agreed between purchaser and supplier for the different types of bonding enamels. The suggested temperature for polyamide bonding enamel is (200 ± 2) °C and the suggested temperature for aromatic polyamide bonding enamel is (230 ± 2) °C. Results: when testing the specimens according to the test method, under the action of load specified in Table 2, no...

1 Scope This part of IEC 6031 7 specifies the requirements of glass fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper winding wire, temperature index 1 80. NOTE For this type of wire, the heat shock test is inappropriate and therefore a heat shock temperature cannot be established. Consequently, a class based on the requirements for temperature index and heat shock temperature cannot be specified. The range of nominal conductor dimensions covered by this standard is: – width: min. 2,0 mm max. 1 6,0 mm; – thickness: min. 0,80 mm max. 5,60 mm. The specified combinations of...

This part of IEC 6031 7 specifies the requirements of solderable enamelled round copper winding wire of class 1 55 with a sole coating based on polyurethane resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics. The range of nominal conductor diameters covered by this standard is: – Grade 1 : 0,01 8 mm up to and including 0,800 mm; – Grade...

7 Dimensions, mass and textile composition 7.1 Dimensions The dimensions of the flexible part of the appliance and the heated area are 7.1.1 determined. The dimensions of a washable detachable cover are also determined in order to 7.1.2 assess the effect of laundering. The appliance is spread out without tension on a flat surface and the length and width are measured. The average values for each dimension are calculated. The dimensions are stated in millimetres (mm), rounded to the nearest 1 0 mm. The lengths of flexible cords are determined. 7.1.3 The measurements are made, as applicable, between – the...