AIM Manual

Motor Application » Three-Phase Motors (Page 30)

Overload Protection (Continued)

Table 30 - 60 Hz 6" Standard & Hi-Temp Motors
HPKWVOLTSNEMA
STARTER
SIZE
HEATERS FOR
OVERLOAD
RELAYS
ADJUSTABLE
RELAYS
(NOTE 3)
FURNAS
(NOTE 1)
G.E.
(NOTE 2)
SETMAX.
1/20.372000K31L380A3.23.4
2300K28L343A2.72.9
3800K22L211A1.71.8
4600-L174A1.41.5
5750--1.21.3
3/40.552000K34L510A4.14.4
2300K32L420A3.53.8
3800K27L282A2.32.5
4600K23L211A1.81.9
5750K21L193A1.51.6
10.752000K37L618A55.4
2300K36L561A4.44.7
3800K28L310A2.62.8
4600K26L282A2.22.4
5750K23L211A1.81.9
1.51.12000K42L750A6.36.8
2300K39L680A5.55.9
3800K32L420A3.33.6
4600K29L343A2.83
5750K26L282A2.22.4
21.52000K50L111B8.69.3
2300K49L910A7.58.1
3800K36L561A4.64.9
4600K33L463A3.84.1
5750K29L380A33.2
32.22000K55L147B11.612.5
2300K52L122B10.110.9
3800K41L750A6.16.6
4600K37L618A5.15.5
5750K34L510A4.14.4
53.72001K62L241B19.120.5
2301K61L199B16.617.8
3800K52L122B1010.8
4600K49L100B8.38.9
5750K42L825A6.67.1
7.55.52001K68L322B28.430.5
2301K67L293B24.626.4
3801K58L181B14.916
4601K55L147B12.313.2
5751K52L122B9.910.6
107.53801K62L241B19.521
4601K60L199B16.117.3
5751K56L165B12.913.6
15113802 (1)K70L322B2931.2
4602 (1)K67L265B2425.8
5752 (1)K62L220B19.320.7
  • Footnotes for Tables 29, 30, 31, and 31A
  • Note 1: Furnas intermediate sizes between NEMA starter sizes apply where (1) is shown in tables, size 1.75 replacing 2, 2.5 replacing 3, 3.5 replacing 4, and 4.5 replacing 5. Heaters were selected from Catalog 294, table 332 and table 632 (starter size 00, size B). Size 4 starters are heater type 4 (JG). Starters using these heater tables include classes 14, 17, and 18 (inNOVA), classes 36 and 37 (reduced voltage), and classes 87, 88, and 89 (pump and motor control centers). Overload relay adjustments should be set no higher than 100% unless necessary to stop nuisance tripping with measured amps in all lines below nameplate maximum. Heater selections for class 16 starters (Magnetic Definite Purpose) will be furnished upon request.
  • Note 2: General Electric heaters are type CR123 usable only on type CR124 overload relays and were selected from Catalog GEP-126OJ, page 184. Adjustment should be set no higher than 100%, unless necessary to stop nuisance tripping with measured amps in all lines below nameplate maximum.
  • Note 3: Adjustable overload relay amp settings apply to approved types listed. Relay adjustment should be set at the specified SET amps. Only if tripping occurs with amps in all lines measured to be within nameplate maximum amps should the setting be increased, not to exceed the MAX value shown.
  • Note 4: Heaters shown for ratings requiring NEMA size 5 or 6 starters are all used with current transformers per manufacturer standards. Adjustable relays may or may not use current transformers depending on design.