JIS-C-9610-1976-R2005-ENG.pdf

J I S C*9610 76 m 4933608 0039746 7 W JIS UDC 621.924.552-831 -182,4 JAPANESE I NDUSTRIAL STANDARD Portable Electric Grinders JIS C 9 6 1 0 - 1 9 7 6 Translated and Published by Japanese Standards Association Printed in Japan 13 S Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS C*ïbLO 76 4933608 0039747 9 Translation without guarantee i n the event of any doubt arising, the original standard in Japanese is to. be evidence c Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S C*ïb10 76 m 4933b08 0039748 O Class (nominal outside diameter of grinding wheel) mm output w min. 150 UDC 621.924.552-831-182.4 125 150 180 205 255 200 300 375 500 750 min. min. min, min. min. JAPANESE INDUSTRIAL STANDARD J I S Portable Electric Grinders C 9610-1976 (Reaffirmed: 1984) Maximum speed of revolution *P (min- 1. Scope 6300 5000 4200 3500 3100 2400 For vitrified grinding wheel For resinoid. 9500 7600 6300 5300 4600 3700 wheel This Japanese Industrial Standard specifies portable electric grinders, hereinafter referred to as the l'grindersll, which are used under a rated frequency of 50 Hz or 60 Hz or rated frequencies of 50 and 60 Hz, together with the grinding wheels specified in JIS R 6210 or JIS R 6212. Single-phase series commutator motor or single-phase induction motor Three-phase squirrel-cage induction motor Remark: The units and the numerical values given in standard are in accordance with the International System of Units (SI), and are appended for reference. 1 in this 100, 200 200 2 . Class, Output and Maximum Speed of Revolution of Grinding Wheel Grinders are classified according to the outside diameters of grinding wheel to be used, and the classes, the outputs and the maximum speeds of revolution of grinding which shall be as given in Table 1. The time rating of the motors shall be 30 min. Table 1 3. Kind and Rated Voltage of Driving Motor The kinds and rated voltages of driving motor shall be as given in Table 2. Table 2 Kind of driving motor -Rated voltage V Applicable Standards: See page 22. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 LIS L- C*ïb10 7b W 4933b08 0039749 2 W 1 C 9610-1976 Of Class A insulation Of Class E insulation Of Class B insulation Motor winding 4, Fluctuation of Supply Voltage 75 90 95 Grinders shall be capable of serving without any practical trouble even if the supply voltage at the terminals fluctuates by 10 % above and below the rated voltage. - Of Class F insulation Of Class H insulation 5. Performances 110 135 5.1 Starting 5.2 Deflection of Grinder Wheel Mounting Shaft The grinder shall start irrespective of the position of the motor rotor when subjected to the test of 8.2. wheel mounting shaft shall not exceed 0.03 mm every time, when tested in accordance with 8.3. The deflection of grinder Knob of switch or the like, and push button . 5.3 Temperature Rise The temperature rise shall not exceed the appropriate value given in Table 3, when tested in accordance with 8.4. Made of metals, ceramics or glass 30 Made of others 45 Table 3 enclosure (in- cluding gear case and bearing part) Measurement point Made of metals, ceramics or glass 35 Made of others 50 Temperature rise 1 O C KI Handle operated by man in service Made of metals, ceramics or glass 25 Made of others 40 Remark: The limit of reference ambient temperature shali be 3OOC. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 J I S C*îbLO 7b W 4933b08 0039750 9 C 9610-1976 Type of contact Copper or copper alloys 5.4 Insulation The insulation shall comply with the following requirements: Temperature rise 40 (1) Insulation Resistance The insulation resistance shall be not less than 2 MR when tested in accordance with 8.5 (1). (2) Dielectric Withstand Voltage The grinder shall withstand the test voltage when subjected to the test of 8.5 (2). 5.5 Output The output characteristic shall comply with the following requirements : (1) The motor output shall be as specified in Table 1, when tested in accordance with 8.6 (1). (2) The motor current shall not exceed 110 % of the full load current (described on the nameplate) when tested in accordance with 8.6 (2). 5.6 Switch The switch shall comply with the following requirements: (1) No trouble shall appear in each part when the test of 8.7 (1) is carried out. (2) The temperature rise of contact shall not exceed the appropriate value given in Table 4, when the test of 8.-7 (2) is carried out. Table 4 Unit: “CK) silver or silver alloys I 65 Remark: The limit of reference ambient temperature shall be 3OOC. 5.7 Bending of Cord 5.7.1 Bending of Joint between Body and Cord The joint between body and cord shall not cause short circuit of the cord when subjected to the test of 8.8.1. exceed 10 %. The relative breakage of component wires of the cord shall not 5.7.2 Bending of Joint between Non-renewable Connector and Cord The joint between non-renewable connector and cord shall not cause short circuit of the cord when subjected to the test of 8.8.2. The relative breakage of component wires of the core shall not exceed 20 %. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS C*9b10 7b 4933b08 0039751 O 4 C 9610-1976 5.8 Resistance to Mechanical Shock The resistance to mechanical shock, when tested in accordance with 8.9, shall comply with the following requirements : (1) No live part shall be exposed. However, such exposure of live part that oan not be touched by the test finger shown in Attached Figure is excluded. (2) No short circuit shall occur when the grinder is connected to the power supply. (3) The insulation resistance between live part and dead metal part liable to be earthed measured with a d.c. 500 V insulation resistance tester shall be not less than 2 Mil. (4) When polyamide ball is dropped, no cracks, splits or other abnormalities which will result in risk of electric shock, fire, etc. shall be caused. 5.9 .Durability N o practical trouble such as loosening of any part shall appear when the test of 8.10 is carried out. 5.10 Noise 5.10.1 Noise under No-load Conditions When the noise under no-load conditions is tested in accordance with 8.11.1, the average of the measured values at 5 positions shall not exceed 82 phones (82 dB(A). 5.10.2 Noise under Loaded Conditions When the noise under loaded conditions is tested in accordance with 8.11.2, the average of the measured values at 4 positions shall not exceed 85 phones (85 dli 1 (A). 5.11 Overload The grinder which has been subjected to the overload test of 8.12 shall withstand such voltage application that a substantially sinusoidal voltage of 50 or 60 Hz, of 1200 V for a grinder with rated voltage 100 V or of 1400 V for a grinder with rated voltage 200 V, is applied between live parts and dead metal parts liable to be touched by a man (accessible dead metal parts), and between non-accessible dead metal parts and accessible dead metal parts for 1 min each. 6. Construction 6.1 Construction in General The construction of grinder shall comply with the following requirements: (1) Grinders shall have no possibility of causing danger during normal use, shall be assembled to have correct style, shall be good in finishing of each part and smooth in operation. (2) Grinders shall operate safely without remarkable vibration and / or abnormal sound during service. (3) Each part shall not easily cause mechanical and/or electrical failure and also danger. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- - 5 C 9610-1976 J I S C*îbLO 7b W 4933b08 0039752 2 Between terminals connected by manufacturer Between terminals connected by manu- facturer and dead metal part liable to be earthed or accessible surface of non- metaiiic part Between live parts of different wire mounting powder are not terminals of com- unticipated ponents havine: Fixed parts where ingress of dust and polarity (including deposition of metal (4) The switch shall be mounted on a position where it is easily operated and shall have no possibility of unexpected starting of the grinder due to contact, vibration, etc. - 3 4 - 2.5 3 1.2 1.5 2 (5) The motor having a commutator shall not cause much spark and its bushes shall be easily replaced. I Other places Fixed parts where ingress of dust and powder are not unticipated Other places deposition of metal (6) The live parts shall not be exposed. 1.5 2.5 3 1.2 1.5 2 1.2 2 2.5 (7) The screws which clamp the conductive parts shall be equipped with any means to prevent loosening. Commutator (8) Good finished surface shall be obtained when a material is ground by a grinder in normal service conditions. 1.6 1.6 1.6 6.2 Insulation Distance The insulation distance shall be as follows: (1) The insulation distances (clearance and creepage distance) between live parts of different polarity, between live part and dead metal part and between live part and accessible dead metal part shall have the values not less than the appropriate values given in Table 5. Table 5 I Line voltage or voltage to earth V Mount of power supply wire Other parts Insulation distance Up to and Over 50 upto and Over 150 up to and I including 50 I including 150 I including 300 - switching mechanism) Between live part and dead metal part liable to be earthed or. ac- cessible surface of non-metallic part Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- : J I S C*SbLO 76 9 4933608 0039753 4 I - 1 6 C 9610-1976 150 kHz (incl.) to 1605 kHz (incl.) 1605 kHz (not incl.) to 27 MHz (incl.) . When the live parts of different polarity are short circuited, the components connected to the shorted circuits will not burn. However, burning of one component connected to the circuit in question is exempted if the burning does not result in burning of other components. Noise field strength dB 60 55 The insulation resistance between live parts and accessible dead metal parts measured after the test (a) with a 500 V insulation resistance tester shall be not less than 0.1 MQ. 6.3 Noise Strength The strength of noise generated from a grinder having a'rated power consumption not exceeding 500 W and employing a commutator motor, shall comply with the following requirements: (1) The noise field strength shall comply with either of the re- quirements given below, over the frequency range of 150 kHz (incl.) to 200 MHz (incl,). Here, dB means the value calculated on the basis of 1 uV/m is O dB, (a) The noise field strength measured by the antenna located at a point 10 m, in horizontal distance, apart from the grinder, shall be not more. than 40 dB, (b) The noise field strength measured by the antenna located at a point 3 m, in horizontal distance, .apart from the grinder, shall have not more than the appropriate values given in Table 6. Table 6 - 27 MHz (not incl.) to 200 MHz (incl,) 50 I The noise terminal voltage measured between one line and the earth, over the frequency range of 525 kHz (incl.) to 1605 kHz (incl,) shall be not more than 65 dB . Here, dB means the value calculated on the basis of 1 uV/m is O dB . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 20:31:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 7 J I S C*ïb10 76 = 4933b08 0039754 b m C 9610- 6.4 Appended Portable Cable The appended portable cable shall comply with the following requirements: (1) The portable cable shall be the Class 2 cabtyre cable specified in JIS C 3302, the P.V.C. insulated and sheathed cable specified in J1S.C 3312, or cables at least equivalent thereto in insulation and mechanical robustness. Excluding grinders of Class II insulation, 3-core cable or 4-core cable shall be used for single-phase or three-phase grinder respectively, and one of the cores shall be colored green (or green yellow stripe if green is impracticable) and used as the earth wire. The portable cable shali have a nominal conductor sectional area of O, 75 mm2 or more, and a length (effective length) of 2.4 m or more, However, the cabtyre cords specified in JIS C 3322 may be used for grinders having an input of 500 W or under. (2) The 2-pole attachment plug or the 2-pole attachment plug with ea1 contact specified in JIS C 8303 shall be attached to the free end of cable of single-phase grinder. If the said connector is not equipped with an earth contact, the earth wire shall be extended from the plug by 10 c m or more and a clip shall be attached to the end of wire. The earth wire shall be identified by an indelible marking. (3) The earth wire and the terminal for connecting the earth wire inside the grinder body shall be identified by indelible markings located on them or in the vicinity. 6.5 Wiring The wiring shall comply with the following requirements: (1) The through hole for portable cable shall be chamfered or suitably treated to protect the portable cable from damage, unless a protective spring, protective bushing or other protective device is used. However, if the through hole is located on non-metallic part, the part is smooth and will not damage the portable cable, the above requirement may not be fulfilled. (2) The tension of the portable cable shall not directly applied to the joint of the portable cable and the internalterminal. ' (3) The i