R Rated Motor Fuses. DD mm. Dimensions - Standard. Dimensions - B bolt-in. Other Medium Voltage Products. Head Office

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1 imensions - Standard.. max R Rated Motor Fuses.. max. 0mm imensions - B bolt-in.. max. X. Slots (. c.t.c.)..mm. max. mm. mm Front view. mm imensions - GE Tags imensions for GE tags are dictated by the GE starters they fi t into. Other Medium Voltage Products - E Rated istribution Fuse to.kv - IN istribution Fuses to kv - Load Break Switches to kv - Capacitor Fuses - Adapter Kits & Live Parts - Remote Indicator Kits - Clips & Insulators - PT Fuses to kv pub: MVR0- Printed in Canada Head Office Norris Court Kingston, On. KP Toll Free T: 0-- Toll free F: 0-- Intl T: -- Intl F: --0 E: info@fusetek.com W: &.kv R Rated Motor Fuses

2 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.kv 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 installation while also providing superior cycling characteristics. Features Integral indicating pin Standard R Ratings Toughened element design Fully plated parts MVR Series General Specifi cations Series Vac I.R Clip iam Clip centers Ratings MVR.kV (mm) A, 0A,, B,Y,S MVR.kV 0kA rms symm (0mm),,,,,,, B,Y,S,X,B,iB MVR.kV (0mm), B,Y,S Standard fuses are clip-in design with diameter barrels ( - are double barrel designs) and have an integral striker/indicator pin. Several options are available to make them compatible with other manufacturers specialized designs. Add suffi xes to the part number as required. More than one option can be specifi ed. All options are not available in some voltages. HV Accessories 00 Amp clip for diameter barrels Steel backup spring for high pressure contact. Compatible with any diameter fuse. Hookeye Add on Hookeye kit is compatible with any diameter fuse. May be ordered separately. Epoxy Resin Insulators We carry a range of epoxy resin insulators from.kv to kv. Tapped brass inserts can accomodate a wide range of equipment. Medium voltage LE line Indicators Bolt these line indicators onto any convenient live part and the high brightness LE cluster will flash to indicate presence of voltage. Rated for.kv - kv Medium Voltage Microswitch Need more than visual indication? Our remote mount microswitch is good for all systems up to kv. The insulated Bowden cable is actuated by the fuse striker which then actuates the microswitch at the other end. p/n. FC p/n. Hookeye p/n. refer to Fusetek p/n. KF- p/n. B ib Medium voltage bases p/n. refer to Fusetek Standard Hook-eye Bolt-in Extended GE B-Bolt-in GE ib-bolt-in Inverted Fusetek can supply single or pole bases for most of the medium voltage fuses we supply.

3 Time in Seconds.kV Total Clearing Time Current Characteristics Part Number System Installation Notes: MV R / 0 - I XYS MV Series 0 I XYS Medium Voltage R Motor Fuse Voltage Class Rating Body Size Option Modifi er =.kv A, 0A = Single I = Striker (standard) =.kv, X = extension = ouble, B = Bolt-in =.kv,,, S = iv., class ll Y = Hookeye B = GE Tags ib = GE inverted tags. When replacing R fuses, always replace with the same R rating to maintain coordination and motor starting capability.. These fuses can replace any manufacturers fuse of same R rating.. Ensure that fuse clips have good tension. (if you can spin the fuse in the clips easily, clips should be replaced.). Clean all contact surfaces before installation.. Install with striker pin facing up. R Rating efined The R rating of a fuse is established by dividing the -s melt current of the fuse by. Fuses of the same R rating will have the same time current characteristics and ensure identical motor starting performance and coordination with the overload relays.. Unless the cause of fuse failure is known to have been confined to phase, fuses should be replaced in sets of to ensure As new performance. 0. 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 coordination with the overload relays. To maintain the same capabilities, fuses should be replaced with matching R ratings. 0A 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 0% of the nominal full load amps of the motor.

4 Peak Let-Thru - Assymmetrical Amperes X Peak Let-thru Characteristics Total Clearing time current 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 intersection 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.. Peak let-thru graph is valid for all voltage classes. Time current Characteristic curves. Time current curves shown on pages - are minimum melting curves. For total clearing, please refer to the curves on pages -. Characteristic curves are generated with the fuse at an ambient temperature of - C. Ambient temperatures higher than 0 C may o o require fuse de-rating. Please contact Fusetek in this instance. Motor Application Tables RMS Symmetrical Amperes Standard duty is defined as: evenly spaced starts per hour, o C ambient temperature, second run-up time and a starting current of no more than X the nominal full load amp of the motor. If any of these parameters are exceeded - use the heavy duty (H) column. The graphic on the right is a screen shot from our free Fusesoft.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.0 can be downloaded at no charge by visiting (0A) (A) (A) (0A) (0A) (0A) (0A) (A) (00A) A/0A Time in Seconds 0..kV Total Clearing Time Current Characteristic 0A Select the appropriate HP rating in the left column Read across to the appropriate voltage and duty column (Std or H) Use the R rating of fuse specified.kv fuses may be used on.kv control

5 Time in seconds Peak instantaneous Let Through current in Kilo Amperes Total Clearing time current characteristics.kv Motor Fuses - clip center These time current curves have been plotted to maximum test points so any variations should be negative. Curves o are based on tests at an ambient of C with fuses starting from cold with no initial load..kv Minimum Melt Time Current Characteristics General Specifi cations.kv Total Clearing Time Current Characteristic A 0. A Part Number A F.L.A. x L (inches) MVR/0A-I A A. MVR/0-I 0. MVR/0-I. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/-I. MVR/-I X. MVR/-I 0 X...mm. max I.R ka 0kA rms Avail. B,Y,S Time in Seconds kvpeak Current Let-through / A Fuse selection for Motors rated at.kv or less Motor HP..mm. max Standard uty Fuse R rating Heavy uty mm Available Current in Amperes

6 Time in seconds Peak instantaneous Let Through current in Kilo Amperes Peak instantaneous Let Through current in Kilo Amperes kV Motor Fuses - clip center.kv Motor Fuses - clip center.kv Minimum Melt Time Current Characteristics 0A Part Number General Specifi cations A F.L.A. x L (inches) MVR/00A-I 0A 0A. MVR/0-I 0. MVR/0-I. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/-I. MVR/-I X. MVR/-I 0 X. MVR/-I 0 X. I.R ka 0kA rms Avail. B.Y.S,X Time in seconds.kv Minimum Melt Time Current Characteristics Part Number General Specifi cations A F.L.A. x L (inches) MVR/0-I 0. MVR/0-I. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/0-I 0. MVR/-I. MVR/-I X. MVR/-I 0 X. I.R ka 0kA rms Avail. B.Y.S max. max 0. MVR/-I 0 X... max kv Peak Current Let-through Available Current in Amperes / 0A Fuse selection for Motors rated at.kv or less Motor HP Standard uty Fuse R rating. 0mm Heavy uty 0A 0A RMS AMPERES.kV Peak Current Let-through. kvpeak Current Let-through Available Current in Amperes / Fuse selection for Motors rated at.kv or less Motor HP.. max Standard uty Fuse R rating Heavy uty mm