‘r’ rated motor fuses - fusetek.comfusetek.com/staff/assets/uploadifive/uploads/322439480… ·...

2.75kV, 5.5kV & 8.3kV ‘R’ Rated Motor Fuses

‘R’ Rated Motor Fuses

MVR ‘R’ Rated Motor FusesMVR ‘R’ Rated Motor Fuses

‘R’ Rated Motor Fuses

MVR fuses are current and energy limiting fuses intended for the backup protection of medium voltage motor control. They are non-venting.

MVR fuses have integral striker/indicators and have standardized dimensions compatible with today’s 5.5kV motor control gear. They are fully interchangeable with other manufacturers’ fuses of the same type and rating.

They feature a ‘field toughened’ element design which makes them less susceptible to mechanical damage during shipping and instal-lation while also providing superior cycling characteristics.

Features

• Integral indicating pin

• Standard “R” Ratings

• Toughened element design

• Fully plated parts

Standard Hook-eye Bolt-in Extended

1B

GE 1B-Bolt-in

1iB

GE 1iB-bolt-inInverted

MVR Series General Specifications

Series Vac I.R Clip Diam Clip centers Ratings Options

MVR2 2.75kV

50kA rms symm 3”

7” (178mm) 25A, 30A, 2R, 3R, 4R, 5R, 6R, 9R, 12R, 18R,

24R, 36R

B,Y,S

MVR5 5.5kV 12” (305mm) B,Y,S,X,1B,1iB

MVR8 8.3kV 12” (305mm) B,Y,S

Options

Standard fuses are clip-in design with 3” diameter barrels (18R - 36R are double barrel designs) and have an integral striker/in-dicator pin. Several options are available to make them compatible with other manufacturers’ specialized designs. Add suffixes to the part number as required. More than one option can be specified.

All options are not available in some voltages.


Medium voltage LED line Indicators

Bolt these line indicators onto any convenient live part and the high brightness LED cluster will flash to indicate pres-ence of voltage. Rated for 2.5kV - 38kV

Epoxy Resin Insulators

We carry a range of epoxy resin insulators from 7.2kV to 38kV. Tapped brass inserts can accomodate a wide range of equipment.

HV Accessories

600 Amp clip for 3” diameter barrels

Steel backup spring for high pressure contact.Compatible with any 3” diameter fuse.

p/n. FC3R

Hookeye Add on

Hookeye kit is compatible with any 3” diameter fuse. May be ordered separately.

p/n. Hookeye

p/n. KF22-12

p/n. refer to Fusetek

Medium Voltage Microswitch

Need more than visual indication? Our remote mount mi-croswitch is good for all systems up to 38kV. The insulated Bowden cable is actuated by the fuse striker which then actuates the microswitch at the other end.

p/n. 3100110

Medium voltage bases

Fusetek can supply single or 3 pole bases for most of the medium voltage fuses we supply.

p/n. refer to Fusetek


RMS Amperes

1000.01

0.1

10

100

1

1000 10000 100000

8.3kV Total Clearing Time Current Characteristics

2R3R4R5R6R9R12R18R24R36R

Tim

e in

Sec

onds


Part Number System

MV R 5 / 09R - DI XYS

Installation Notes:

1. When replacing ‘R’ fuses, always replace with the same ‘R’ rating to maintain coordination and motor starting capability.

2. These fuses can replace any manufacturers’ fuse of same ‘R’ rating.

3. Ensure that fuse clips have good tension. (if you can spin the fuse in the clips easily, clips should be replaced.)

4. Clean all contact surfaces before installation.

5. Install with striker pin facing up.

6. Unless the cause of fuse failure is known to have been confined to 1 phase, fuses should be replaced in sets of 3 to ensure ‘As new’ performance.

R Rating Defined

The ‘R’ rating of a fuse is established by dividing the 20-35s melt cur-rent of the fuse by 100.

Fuses of the same ‘R’ rating will have the same time current character-istics and ensure identical motor starting performance and coordination with the overload relays.

Technical data presented.

Amp Rating

Each fuse has both an assigned ‘R’ and amp rating. It is the ‘R’ rating of the fuse that governs the motor starting capability and coordi-nation with the overload relays. To maintain the same capabilities, fuses should be replaced with matching ‘R’ ratings.

On direct across the line starts, the necessity of passing the motor starting current results in a fuse selection with an assigned amp rating well above the nominal motor full load amps.

However, applications using reduced voltage starts, variable frequency drives or other methods to reduce the motor starting current, can result in a fuse rating with an amp rating too close to the motor F.L.A. As a check, the fuse’s assigned full load amp rating should be a minimum of 140% of the nominal full load amps of the motor.

MV Series 5 09R DI XYS

Medium Voltage R Motor Fuse Voltage Class Rating Body Size Option Modifier

2 = 2.75kV 25A, 30A2R, 3R4R, 5R6R, 9R

12R, 18R24R, 36R

D = Single 3” I = Striker (standard)X = 2” extensionB = Bolt-inS = Div. 1, class llY = Hookeye1B = GE Tags1iB = GE inverted tags

5 = 5.5kV DD = Double 3”

8 = 8.3kV

9R200A


Peak Let-thru Characteristics

Use these characteristics to evaluate busbar bracing requirements and withstand capability of down-the-line components.

Read RMS fault value on lower scale and read up to where it intersects the line for the fuse you are evaluating. From this intersec-tion point, read across to the left hand scale to obtain the peak current let-thru. Note: this value is in peak asymmetrical amperes. To convert to RMS symmetrical, divide by 2.3. Peak let-thru graph is valid for all voltage classes.

Time current Characteristic curves.

Time current curves shown on pages 4-6 are minimum melting curves. For total clearing, please refer to the curves on pages 7-9.

Characteristic curves are generated with the fuse at an ambient temperature of 24-26 C. Ambient temperatures higher than 30 C may require fuse de-rating. Please contact Fusetek in this instance.

24R (450A)

18R (390A)12R (230A)

9R (200A)

6R (170A)5R (150A)4R (130A)3R (100A)

2R (700A)

25A/30A

RMS Symmetrical Amperes

Peak

Let

-Thr

u - A

ssym

met

rical

Am

pere

s X

1000

5 6 7 8 9 10 20.01

.02

.03

.04

.05

.06

.07

.08

.09

1

2

3

4

56789

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.9

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5060708090

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30 40 50 60 70 80 90 100

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9000

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010

0000

7000

Motor Application Tables.

Standard duty is defined as: 2 evenly spaced starts per hour, 25o

C ambient temperature, 10 second run-up time and a starting current of no more than 6X the nominal full load amp of the motor.

If any of these parameters are exceeded - use the heavy duty (HD) column.

• Select the appropriate HP rating in the left column

• Read across to the appropriate voltage and duty column (Std or HD)

• Use the ‘R’ rating of fuse specified

• 5.5kV fuses may be used on 2.3kV control.

The graphic on the right is a screen shot from our free Fusesoft 5.0 fuse selection software and shows the ideal coordination between the fuse, overload relay and motor starting current. The motor starting tables were generated using this software. Fusesoft 5.0 can be downloaded at no charge by visiting www.fusetek.com

o o


Total Clearing time current characteristics

0.01

0.1

10

100

1

Tim

e in

Sec

onds

100 1000 10000 100000

30A2R3R4R5R6R9R

12R18R24R36R


RMS Amperes

5.5kV Total Clearing Time Current Characteristic


Total Clearing time current characteristics

These time current curves have been plotted to maximum test points so any variations should be negative. Curves are based on tests at an ambient of 25 C with fuses starting from cold with no initial load.

Tim

e in

Sec

onds

25A2R3R4R5R6R9R

12R18R24R


0.01

0.1

10

100

1

100 1000 10000 100000RMS Amperes

2.75kV Total Clearing Time Current Characteristic

o


2.75kV Peak Current Let-through

Available Current in Amperes

Peak

inst

anta

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t Thr

ough

cur

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in K

ilo A

mpe

res

24R

25A

18R

9R/12R6R5R4R3R2R

.2

.3

.4

.5

.6

.7

.8

.91

2

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2.75kV Motor Fuses - 7” clip center

General Specifications

PartNumber

A F.L.A.D x L

(inches)I.RkA

Avail.Options

MVR2/025A-DI 25A 25A 3 10.8

50kArms

B,Y,S

MVR2/02R-DI 2R 70 3 10.8

MVR2/03R-DI 3R 100 3 10.8

MVR2/04R-DI 4R 130 3 10.8

MVR2/05R-DI 5R 150 3 10.8

MVR2/06R-DI 6R 170 3 10.8

MVR2/09R-DI 9R 200 3 10.8

MVR2/12R-DI 12R 230 3 10.8

MVR2/18R-DDI 18R 390 2X3 10.8

MVR2/24R-DDI 24R 450 2X3 10.8

2.75kV Minimum Melt Time Current Characteristics

Fuse selection for Motors rated at 2.75kV or less

Motor HPFuse ‘R’ rating

Standard Duty Heavy Duty

100 2R 2R

150 3R 3R

200 4R 5R

250 4R 5R

300 5R 6R

350 6R 6R

400 9R 9R

450 9R 9R

500 9R 12R

600 12R 12R

700 12R 18R

800 18R 18R

900 18R 18R

1000 18R 24R

1250 24R 24R

25A2R3R4R5R6R9R12R18R24R

RMS Amperes

Tim

e in

sec

onds

100 1000 10000 1000000.01

0.1

1

10

100

2.75 kVPeak Current Let-through

10.88”276.35mm

10.88”276.35mm

3”76.2mm

3”76.2mm

.63” max16mm

3”76.2mm

.63” max16mm

6.31” 160mm

3”76.2mm

D

DD




PartNumber

A F.L.A.D x L

(inches)I.RkA

Avail.Options

MVR5/030A-DI 30A 30A 3 15.8

50kArms

B.Y.S,X

MVR5/02R-DI 2R 70 3 15.8

MVR5/03R-DI 3R 100 3 15.8

MVR5/04R-DI 4R 130 3 15.8

MVR5/05R-DI 5R 150 3 15.8

MVR5/06R-DI 6R 170 3 15.8

MVR5/09R-DI 9R 200 3 15.8

MVR5/12R-DI 12R 230 3 15.8

MVR5/18R-DDI 18R 390 2X3 15.8

MVR5/24R-DDI 24R 450 2X3 15.8

MVR5/36R-DDI 36R 650 2X3 15.8




100 30A 30A

150 2R 2R

200 2R 2R

250 3R 3R

300 3R 3R

350 3R 4R

400 4R 5R

450 4R 5R

500 5R 6R

600 5R 6R

700 6R 9R

800 9R 9R

900 9R 12R

1000 9R 12R

1250 12R 18R

1500 18R 18R

30A2R3R4R5R6R9R12R18R24R36R

100 1000 10000 1000000.01

0.1

1

10

100

RMS Amperes

Tim

e in

sec

on

ds


5.5 kV Peak Current Let-through

15.88”403mm

15.88”403mm

3”76.2mm

3”76.2mm

.63” max16mm

3”76.2mm

.63” max16mm

6.31” 160mm

3”76.2mm

D

DD



Peak

inst

anta

neou

s Le

t Thr

ough

cur

rent

in K

ilo A

mpe

res 36R

24R

30A

18R

9R/12R6R5R4R3R2R

.2

.3

.4

.5

.6

.7

.8

.91

2

345678910

20

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405060708090

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PartNumber

A F.L.A.D x L

(inches)I.RkA

Avail.Options

MVR8/02R-DI 2R 70 3 15.8

50kArms

B.Y.S

MVR8/03R-DI 3R 100 3 15.8

MVR8/04R-DI 4R 130 3 15.8

MVR8/05R-DI 5R 150 3 15.8

MVR8/06R-DI 6R 170 3 15.8

MVR8/09R-DI 9R 200 3 15.8

MVR8/12R-DI 12R 230 3 15.8

MVR8/18R-DDI 18R 390 2X3 15.8

MVR8/24R-DDI 24R 450 2X3 15.8

MVR8/36R-DDI 36R 650 2X3 15.8




250 2R 2R

300 2R 2R

350 2R 2R

400 2R 3R

450 3R 3R

500 3R 4R

600 3R 4R

700 4R 5R

800 4R 5R

900 5R 6R

1000 5R 6R

1250 6R 9R

1500 9R 12R

1000.01

0.1

1

10

100

1000 10000 100000

2R3R4R5R6R9R

12R18R24R36R

RMS AMPERES

Tim

e in

sec

on

ds

8.3 kVPeak Current Let-through




Peak

inst

anta

neou

s Le

t Thr

ough

cur

rent

in K

ilo A

mpe

res 36R

24R18R

9R/12R6R5R4R3R2R

.2

.3

.4

.5

.6

.7

.8

.91

2

345678910

20

30

405060708090

100

100

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1000

2000

3000

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5000

6000

7000

8000

9000

1000

0

3000

0

2000

0

4000

050

000

6000

070

000

8000

090

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1000

00

15.88”403mm

15.88”403mm

3”76.2mm

3”76.2mm

.63” max16mm

3”76.2mm

.63” max16mm

6.31” 160mm

3”76.2mm

D

DD


Head Office

599 Norris CourtKingston, On. K7P2R9

Toll Free T: 800-479-3875Toll free F: 800-866-7690

Intl T: 613-384-4144Intl F: 613-384-0167

E: [email protected]: www.fusetek.compub: MVR09-1 Printed in Canada

Other Medium Voltage Products

- ‘E’ Rated Distribution Fuse to 28.8kV

- DIN Distribution Fuses to 38kV

- Load Break Switches to 38kV

- Capacitor Fuses

- Adapter Kits & Live Parts

- Remote Indicator Kits

- Clips & Insulators

- PT Fuses to 38kV

Dimensions - Standard

15.88”403mm

17.8”457mm

19.3”490mm

3”76.2mm

3”76.2mm

.44” X .91” Slots(1.53” c.t.c.)

3”76.2mm

.63” max16mm

.63” max16mm

3”76.2mm

3.6”91.4mm

7.6”193mm

Front view

Dimensions - ‘B’ bolt-in

Dimensions - GE TagsDimensions for GE tags are dictated by the GE starters they fit into.

15.88”403mm

15.88”403mm

3”76.2mm

3”76.2mm

.63” max16mm

3”76.2mm

.63” max16mm

6.31” 160mm

3”76.2mm

D

DD

‘r’ rated motor fuses - fusetek.comfusetek.com/staff/assets/uploadifive/uploads/322439480… ·...

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