102
Medium
Voltage Fuses UL/CSA Fuses
Current Limiting
UL/CSA Fuses
General Purpose
Special
Purpose Fuses
Canadian
Fuses & Holders
Application
Section Fuse Blocks,
Holders & Misc.
For additional information, visit www.edisonfuse.com
R-Rated Medium Voltage Fuses
For Motor Circuits
Notes:
1. Interrupting rating - 80,000 amps asymmetrical 60Hz.
2. These fuses are dimensionally interchangeable with corresponding R-
Rated fuses produced by other leading North American manufacturers.
List of Ratings
Medium Voltage R-Rated Fuses for 2.4 and 4.8kV Motors
Dimensions - in (mm)
0.63" max.
16.0mm
10.88"
276.0mm
3"
76.2mm
Figure 1
0.63" max.
16.0mm
15.88"
403.0mm
3"
76.2mm
Figure 3
Figure 4
6.31"
160.0mm
3"
76.2mm
Figure 2
0.63" max.
16.0mm
10.88"
276.0mm
3"
76.2mm
0.63" max.
16.0mm
15.88"
403.0mm
3"
76.2mm
3"
76.2mm
3"
76.2mm
6.31"
160.0mm
3"
76.2mm
2.4kV System Voltage Current Rating Figure
Catalog Symbol Amps at 40°C Number
2.75 VFRHA 2R 70
2.75 VFRHA 3R 100
2.75 VFRHA 4R 130
2.75 VFRHA 6R 170 1
2.75 VKRHA 9R 200
2.75 VKRHA 12R 230
2.75 VKRHK 18R 390
2.75 VKRHK 24R 450 2
4.8kV System Voltage
5.5 VFNHA 2R 70
5.5 VFNHA 3R 100
5.5 VFNHA 4R 130
5.5 VFNHA 6R 170 3
5.5 VKNHA 9R 200
5.5 VKNHA 12R 230
5.5 VKNHK 18R 390
5.5 VKNHK 24R 450
5.5 VKNHK 30R 450
5.5 VKNHK 36R 500 4
5.5 VKNHK 40R 600
5.5 VKNHK 48R 650
Circuit Pr otection
103
Medium
Voltage Fuses
UL/CSA Fuses
Current Limiting UL/CSA Fuses
General Purpose Special
Purpose Fuses Canadian
Fuses & Holders Application
Section
Fuse Blocks,
Holders & Misc.
For additional information, visit www.edisonfuse.com
R-Rated Medium Voltage Fuses
For Motor Circuits
100,000
10,000
1,000
100
100
10
1
.1
RMS SYMMETRICAL CURRENT IN AMPS
TIME IN SECONDS
.01
4
6
9
12
18
24
"R"
RATING
3
2
3036
40
48
100,000
10,000
1,000
100
100
10
1
.1
RMS SYMMETRICAL CURRENT IN AMPS
TIME IN SECONDS
.01
4
6
9
12
18
24
"R"
RATING
3
2
30
36
4840
Time-Current Characteristics for 5.5kV and 2.75kV Fuses
Minimum MeltTotal Clear
104
Medium
Voltage Fuses UL/CSA Fuses
Current Limiting
UL/CSA Fuses
General Purpose
Special
Purpose Fuses
Canadian
Fuses & Holders
Application
Section Fuse Blocks,
Holders & Misc.
For additional information, visit www.edisonfuse.com
R-Rated Medium Voltage Fuses
For Motor Circuits
2.4kV 4.16kV 4.8kV
FLA FUSE FLA FUSE FLA FUSE
Hp Amps “R” Amps Amps “R” Amps Amps “R” Amps
75172R70––––––
100222R70––––––
125 28 3R 70 16 2R 70 – – –
150 33 3R 100 19 2R 70 17 2R 70
200 44 4R 130 26 3R 100 22 2R 70
250 55 6R 170 32 3R 100 28 3R 100
300 67 6R 170 38 4R 130 33 3R 100
350 78 9R 170 45 4R 130 39 4R 130
400 89 9R 200 45 4R 130 44 4R 130
500 111 12R 230 64 6R 170 55 6R 170
600 133 18R 390 77 9R 200 67 6R 170
700 155 18R 390 90 9R 200 78 9R 200
800 177 18R 390 102 9R 230 89 9R 200
900 200 18R 390 115 12R 230 100 9R 200
1000 222 24 450 128 18R 390 111 12R 230
1100 244 24R 450 141 18R 390 122 12R 230
1200 266 24R 450 154 18R 390 133 18R 390
1400 311 30R 450 179 18R 390 155 18R 390
1600 355 36R 500 205 18R 390 177 18R 390
1800 399 40R 600 230 24R 450 200 18R 390
1900 422 40R 600 243 24R 450 211 18R 390
2000 444 40R 600 256 24R 450 222 24R 450
2200 488 48R 650 282 30R 450 244 24R 450
2400 – – – 307 30R 450 266 24R 450
2600 – – – 333 36R 500 288 30R 450
2800 – – – 358 36R 500 311 30R 450
3000 – – – 384 36R 500 333 36R 500
3500 – – – 448 40R 600 388 36R 500
4000 ––––––44440R600
4500 ––––––50048R650
Peak Let-Through Current Curve (5.5kV and 2.75kV Fuses)
10
1
.1
100
10
1
.1
PROSPECTIVE CURRENT (SYM. RMS kA)
PEAK CURRENT (kA)
4
6
9
12
18
24
"R"
RATING
3
2
30
36
40
48
Application for HV Motor Circuit Fuses
The following table is a general guide only based on a
number of assumptions regarding the motor duty
application which are listed below. Contact Edison
Customer Satisfaction for specific application information.
The application tables are based on the following
assumptions:
Contact Edison Customer Satisfaction for applications regarding other operating conditions.
Motor Efficiency ---------- 90% Run Up Time ------ 10 Secs.
Motor Power Factor ----- 0.9 Starting Method -- Full Voltage
Starting Current ---------- 6 x FLA Min. Fuse Size---- 1.3 x FLA
Starts/Hour ---------------- Max of 2/Hour
