Tech Tip

NEMA STARTER and FUSE SELECTION

Type "2" Protection (UL Verified)

Motor HP
3 phase
Motor HP 3 phase Allen-Bradley
Starter
Allen-Bradley
Starter
Heater Element Bussmann Low-Peak Yellow™ Fuse
Max. Ampere
Bussmann Low-Peak
Yellow™ Fuse
125% FLA²
Bussmann Low-Peak
Yellow™ Fuse
125% FLA²
460V 575V NEMA Size Basic Cat. # * Cat. # ** Type 2 Class RK1 (HRCI-R) Class J (HRCI-J)
- 5 0 509-A W47 12 LPS-RK-8SP LPJ-8SP
5 - 0 509-A W49 15 LPS-RK-10SP LPJ-10SP
- 7-1/2 1 509-B W51 20 LPS-RK-12SP LPJ-12SP
7-1/2 10 1 509-B W53 20 LPS-RK-15SP LPJ-15SP
10 - 1 509-B W56 30 LPS-RK-17-1/2SP LPJ-17-1/2SP
- 15 2 509-C W58 35 LPS-RK-25SP LPJ-25SP
15 20 2 509-C W61 50 LPS-RK-30SP LPJ-30SP
20 25 2 509-C W63 60 LPS-RK-35SP LPJ-35SP
25 - 2 509-C W66 60 LPS-RK-45SP LPJ-45SP
- 30 3 509-D W64 70 LPS-RK-40SP LPJ-40SP
30 - 3 509-D W66 90 LPS-RK-50SP LPJ-50SP
- 40 3 509-D W66 90 LPS-RK-60SP LPJ-60SP
40 50 3 509-D W69 100 LPS-RK-70SP LPJ-70SP
50 - 3 509-D W72 100 LPS-RK-90SP LPJ-90SP
- 60 4 509-E W71 100 LPS-RK-80SP LPJ-80SP
60 75 4 509-E W74 125 LPS-RK-100SP LPJ-100SP
75 - 4 509-E W77 175 LPS-RK-125SP LPJ-125SP
- 100 4 509-E W78 175 LPS-RK-125SP LPJ-125SP
100 - 4 509-E W82 200 LPS-RK-175SP LPJ-175SP
- 125 5 509-F W35 200 LPS-RK-175SP LPJ-175SP
- 150 5 509-F W36 200 LPS-RK-200SP LPJ-200SP
125 - 5 509-F W37 200 LPS-RK-200SP LPJ-200SP
150 - 5 509-F W39 250 LPS-RK-225SP LPJ-225SP
- 200 5 509-F W40 300 LPS-RK-250SP LPJ-250SP
200 - 5 509-F W42 400 LPS-RK-300SP LPJ-300SP

*  Catalog number is not complete. Refer to Bulletin 509 section of A-B Industrial Control Catalog to
   specify complete catalog starter number.


** Class 20 heater elements have been selected for motors with a marked service factor of 1.15 or
   greater, with the same ambient temperature at the controller and the motor.  For other applications,
   refer to Element Selection section of A-B Industrial Control Catalog.


²   Refer to Bussmann "Electrical Protection Handbook" (SPD) for more information on motor circuit
   protection.


For applications below 460V, single phase systems, and larger HP ratings, contact Bussmann.


Testing per IEC Standard 947-4-1.

BUSS_AB (orig.-8/1/02)