0000007767 00000 n H���ێ��s=E_���`�!^ @.�]&X�zw'�8���͓�d���%R�-H�$����_�߿�����=����?��qyʙ��!���;31A�������Ӂ��lb?҉M�ǃ�(�����h)�� -O��|�@���������>>���� 9t�:4r��a ��/vf�y�f������#|���_ϝ~~��P>�X?�G���b��N�w������_O:��tP��R ��0I(SK�z߿ᩊn�����Pt�|�Qs_B �W��o{^ͻ'^)D��e:��k��tR�*gg�p#��-�`��zN%3��d���PE��VD+=�k\�����x'��a�����A&��y����,&D6"h,#1��,��&}�ob� _jR��J��Y1IacN��|�M�h� ���N[�í��W�L��. Part III: The Motor Overload, explains how to properly size overload protection for a typical motor installation using separate overload protection, and Part IV will discuss how to properly size motor branch-circuit, short-circuit and ground-fault protection. Knowing when to ground a generator is critical for operator safety. 0000023661 00000 n Refer to the specified table and use the controller size and motor amps to select the heater catalog number. Most 9-lead, 3-phase motors are “dual-voltage” motors. 0000014172 00000 n 0000001009 00000 n Fig. The old style type N heater elements are used with Bulletin 709 motor starters and Overload Relay Blocks. Until then, I encourage each of you to work toward being a better professional today than you were yesterday. Overloads can be a rating higher than that determined by 430.32(A)(1) if the sensing element or setting of the overload device selected in accordance with 460.32(A)(1)… is not sufficient to start the motor or to carry the load. H���]LSW ����-��_��ۜ�ù,�3�2yYv!�%8�MqY�{�mu�z�U�D������@\�l{��%dY2\f�,���v���=.�?m�9�����?� � � ����0� 0000016277 00000 n 0000009170 00000 n application/pdf 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). 0000013335 00000 n Tweet. The fuse sizing in Column 4 for LPS-RK_SP, LPN-RK_SP, FRS-R and FRN-R fuses provides a degree of motor and circuit overload protection to back-up the normal motor overload protective device. Valuable Electrical Tables & Charts. 0000020280 00000 n rise not over 40°c. 0000014511 00000 n Motor Current Overload Relay Motor Damage SCPD 10000.0 1000.0 100.0 10.0 1.0 1.0 Multiples of FLA 10.0 Trip Time (s) 100-125% NEMA 105-120% IEC Run Current Starting Current Ic Figure 2 Typical Coordination Curves Product Description Part I and Part II of this series explained how to determine the motor load used when sizing motor branch-circuit conductors and how to perform the calculations necessary to size the motor branch-circuit conductors. 0000003305 00000 n 0000023457 00000 n Motor Current Overload Relay Motor Damage SCPD 10000.0 1000.0 100.0 10.0 1.0 1.0 Multiples of FLA 10.0 Trip Time (s) 100-125% NEMA 105-120% IEC Run Current Starting Current Ic Figure 2 Typical Coordination Curves Product Description 0000005562 00000 n 0000014665 00000 n Refer to the specified table and use control size and motor amps to select the heater code number. 0000014414 00000 n 0000008666 00000 n 0000019110 00000 n 0000004500 00000 n Know your Code. 0000022599 00000 n Maximum starting time 5 seconds Maximum starting current 2 × rated motor current. 0000007592 00000 n 0000027211 00000 n Find heater table number below, using the Product Class, Controller Size and Phase. 0000003192 00000 n 0000016587 00000 n motor protection tables time delay ul class rk1 or rk5 fuse ampere rating motor running protection (used without properly sized overload relays) motor full-load amps back-up motor running protection (used with properly sized overload relays) motor full-load amps motor service factor of 1.15 or greater or with temp. %PDF-1.6 %���� ���V6�I��K.> �}O^� {A`=�]�7��*��. Separate overloads are sized according to 460.32(A)(1): Motors marked with a service factor 1.15 or greater and marked with a temperature rise of 40°C or less are sized at 125% of the nameplate FLA, and all other motors are sized at 115% of the nameplate FLA.

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