endstream 39 18 Fuses with an A-C voltage rating may be applied at system voltages below the fuse voltage rating, but not at voltages above the fuse voltage rating. All Products . xref On-Site Repair Advantages ... NEMA STARTER and FUSE SELECTION… Fuses serve two main purposes: 1. To protect components, equipment and people from risk of fire and … x����O�0��#�������XB���*A�1����8R��VM�������5����x|9���=9�����k��Hd����s�g?�`�go1�z��t�g���.' Table of Contents Page Fuse Characteristics, Terms and Consideration Factors 2–4 Fuse Selection Checklist 5–7 PTC Characteristics and Terms 8–9 PTC Product Applications 10 Typical PTC Circuit Protection Designs 11 Standards 12–14 PTC Selection Worksheet 15 Fuse and PTC Products Selection Guide 16–18 Packaging and Part Numbering 19 0000001345 00000 n When a conductor is oversized to prevent excess voltage drop, size the fuses … On-Site Repair . ���� JFIF � � �� lExif II* 1 J \ Q . endobj A-C rated fuses should not be applied in D-C voltage circuits 0000003396 00000 n %PDF-1.4 %���� 2. Fuses are overcurrent devices that protect electrical and electronic devices by melting and opening a circuit to prevent excessive current from causing damage or starting fires. endobj The second criteria is the frequency of starting the motor which can lead to the aging of the fuse, which in turn might result in changes in the characteristics of the fuse. trailer I GENERAL 1 This data bulletin is a guide for the selection, applica- tion, and coordination of S&C Power Fuses-Types SM, SML, and SMD … 800-575-5562. www.schurterinc.com Fuse Selection Guide 2 Purpose of Fuses > Circuit protection is critical, and in many cases required, in electrical and electronic products. 2 0 obj 5 0 obj www.schurterinc.com Fuse Selection Guide 17 Selecting a Fuse Part Number > Step 4: Selection of the correct fuse rating and part number from Schurter’s product line. 39 0 obj <> endobj In selecting a fuse, we must consider most of the fuse parameters: 1) Current rating. 0000003174 00000 n Get Started > The Circuit Wizard app is available for Android™ devices & … x�b```f``z�����2�A��b�@�q��A��Kc��k��6�&�Z�;�w�>��6���S$t�q!�I�3�Tx3��.�xHy,Z���H�Z��(����,&�.���)T�T�� � &9`LFA 0D 56 0 obj <>stream 800-575-5562. %���� > Fuses can prevent safety hazards to the end user such as fire and catastrophic failure of the product. <> (�UV���$6O٨�w�D:p�2흖�ni۶��Ī�m3H��m�w%5�h��5�X&� �u�ؼY�,���������ջ:�1~b6�v'D{��:�۩����?�wv� Send-In Repair . The other A-C fuse ratings remain the same at applied voltages below the fuse voltage rating. 0000008296 00000 n Fuses sized in accordance with Column 5 must be used in conjunction with properly sized motor overload protection such as overload relays or solid state motor controllers (430.32). 0000003848 00000 n NEMA Starter and Fuse Selection Table. ",#(7),01444'9=82. Selection of fuses for the protection of transformers page 2 d a te 10/95 - B¥3¥3-revised 04/ 2004 1 0 obj 4) Voltage rating. In selecting the fuse from the time-current curves, the tolerance on current rates given in the standards should not be neglected (± 20% on current value). Generally, to select the right fuse, it is sufficient to use the SM6 fuse selection tables (see page 11). 0000005603 00000 n <> Repair Overview. Before choosing the interrupting rating, we need to know the prospective short-circuit current of the supply circuit. endstream endobj 40 0 obj <> endobj 41 0 obj <> endobj 42 0 obj <>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 43 0 obj <> endobj 44 0 obj <> endobj 45 0 obj <> endobj 46 0 obj <> endobj 47 0 obj [/ICCBased 54 0 R] endobj 48 0 obj <> endobj 49 0 obj <> endobj 50 0 obj <> endobj 51 0 obj <> endobj 52 0 obj <> endobj 53 0 obj <>stream ����i �.�`���A��"�|�5�\9�00\`z�#��%�f��d���˕C"�4��c� �� +;5� 0000001504 00000 n Once the current value is determined, then a fuse rating should be selected as to be 135% of this value (taken to the next standard value). Through proper fuse selection, you can minimize risks and failures so that an electronic product retains its competitive edge. Buss Fuse Selection Chart (600 Volts or Less) Circuit Load Ampere Fuse Symbol Voltage Interrupting Remarks Rating Type Rating (a-c) Class Rating Page (KA) Conventional Dimensions—Class RK1, RK5 (0-600A), L (601-6000A) All type loads 0-600A LOW-PEAK® LPN-RK_SP 250V RK1†† 300 All-purpose fuses… 0000003624 00000 n 3) Interrupting current rating. <<0962B1AF757A08479700908C8232B9E9>]>> �F۹��vA�a���_�T:��"lb��S��/�nj�5��i��v� �]=���[�s�w�P�?�o�j(���X�uuU8�����^�F�Ӯ�7� ����$��U%������7����: NI,׫��2��mt��� ���O�|,:�Ǫ���%1�]O�1˶�+F�kf� �"��1��TYC��C��;��R����� _�:��� �ƴU�v��� D�p��������٠rb|�q\�'L̟�9�qm�� ��q��]KCظ��0�+=3ֳ�������h����h{�J�Rg��ĥ�Ԫԥh"�ƪ��� ���t�! %%EOF 0000002931 00000 n hބW�r�F��+���o8'Ŏ]I��N�Tr�"7!x���gf @��Te�$w==݋��9l����v�����q�c���d1g�@����a�_ܾ�94�|#ݴ�V �s\�\�C�R�2ߩ )+���*)FȢ��1|��t�>����2LX�����i� � �qėaD�ɧz# �m˿W�R�ܕ_��K�y���8c�eO�"NyM����};��k��A����j1��,��e�"����X. From the circuit, we know the circuit voltage, so we can readily choose the fuse voltage rating. 0000001171 00000 n 0000000656 00000 n <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> <> $.' 3 0 obj 3. 0000001041 00000 n Class H fuse reducers cannot be used with Class R fuse clips. 0000002896 00000 n Shop By Phone . Fuses selected from this column are intended to provide short circuit and ground-fault protection for motor branch circuits. 800-575-5562. %PDF-1.5 0000002675 00000 n 0000003925 00000 n For example, if the normal steady-state current is calculated to be 10 amps, then a 15A fuse rating should be selected [10 amps x 135% = 13.5 … 2) Current-time curve ratings. > Fuses are an inexpensive and effective way to protect your device from damage due to overcurrent conditions. 0000000016 00000 n <>>> stream Use the Blue Sea Systems Circuit Wizard to select the correct wire size, circuit breaker or fuse type and amperage, and fuse holder.

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