Specifications

H5
GE Limitamp
®
Medium Voltage Motor Control
Application Data
H
Table H.1 Motor Current Limiting Fuse And Current Transformer
Ratio Selection (For Estimating Only) Based Upon 600% Locked
Rotor Current
Table H.2 CT Ratio Based on Rated Load Current
Table H.3 Fuse Selection Based On Full Load Current
Table H.4 Fuse Ratings For Transformer Feeders
(For Estimating Only)
Three-Phase
Transformer
2400 volts 4160 volts
Full Load Current Fuse Full Load Current Fuse
9 2.16 7E 1.25 5E
15 3.6 10E 2.08 7E
30 7.2 20E 4.2 15E
45 10.8 25E 6.2 15E
75 18 30E 10.4 25E
112.5 27 40E 15.6 30E
150 36 50E 20.8 40E
225 54 65E 31.3 50E
300 72 100E 41.6 50E
500 120 150E 69.4 80E
750 180 200E 104 125E
1000 240 250E 139 150E
1500 361 400E 208 250E
2000 — — 278 300E
2500 — — 347 400E
FUSE SELECTIONS (Assumes 600% locked rotor)
0-44A 3R
45-62A 4R
63-94A 6R
95-140A 9R
141-184A 12R
185-276A 18R
277-360A 24R
361-408A P425
409-510A P550
511-630A P630
631-800A P800
Current CT Ratio Current CT Ratio
10-14A 20/5 121-160A 200/5
15-24A 30/5 161-255A 300/5
25-40A 50/5 256-355A 400/5
41-60A 75/5 356-480A 600/5
61-80A 100/5 481-670A 800/5
81-120A 150/5
Motor
Horsepower
Typical FLA CT RatioEJ2 Rating Typical FLA CT RatioEJ2 Rating
2400 volts 4160 volts
150 35 50/5 3R 20 25/5 3R
200 46 75/5 4R 25 40/5 3R
250 57 75/5 4R 33 50/5 3R
300 69 100/5 6R 41 75/5 3R
350 81 150/5 6R 47 75/5 4R
400 92 150/5 6R 54 75/5 4R
450 105 150/5 9R 60 75/5 4R
500 113 150/5 9R 66 100/5 6R
550 123 200/5 9R 73 100/5 6R
600 135 200/5 9R 80 100/5 6R
650 145 200/5 12R 87 150/5 6R
700 155 200/5 12R 93 150/5 6R
750 166 300/5 12R 100 150/5 9R
800 176 300/5 12R 106 150/5 9R
850 186 300/5 12R 113 150/5 9R
900 197 300/5 18R 120 150/5 9R
950 207 300/5 18R 126 200/5 9R
1000 218 300/5 18R 133 200/5 9R
1200 266 400/5 18R 152 200/5 12R
1250 279 400/5 18R 158 200/5 12R
1500 187 300/5 12R
1750 217 300/5 18R
2000 246 400/5 18R