Semiconductor (AC) fuses

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Bartholomew Montgomery
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Main characteristics Recognized 650 to 300VAC / 63 to 2800A. Exceptionally low I 2 T, Watt losses. Non-magnetic construction, highly reliable low voltage. Indicator system.

This fuse preselection table indicates, for each size: -rated current (or rating) In - pre-arcing I 2 t (I 2 tp) at ms - total operating I 2 t (I 2 t t ) at 000 V and 850V(I)f=50Hz, cos ϕ =0.

1 Main characteristics Recognized 650 to 300VAC / 63 to 2800A. Exceptionally low I 2 T, Watt losses. Non-magnetic construction, highly reliable low voltage. Indicator system. Conformity to UL, CSA investigated, IEC, DIN and VDE standards. Increased technical performance Higher ratings. Reduction in volume and weight. This fuse preselection table indicates, for each size: -rated current (or rating) In - pre-arcing I 2 t (I 2 tp) at ms - total operating I 2 t (I 2 t t ) at 000 V and 850V(I)f=50Hz, cos ϕ =0.5, and for a total operating time from 8 to 0 ms - dissipated power Pn at the rated current In, and at 0.8 In, in steady state - breaking capacity at various voltages, checked by tests made in accordance with IEC and American standards. PSC 650 to 300VAC US and European standard Estimated breaking capacity: 300 ka Total I 2 Nominal Voltage Pre-arcing 000V Tested Breaking capacity Size U N (VAC) Ampere I 2 ms Un Power (W) Rating (A) (ka 2 s) (ka 2 s) IEC UL End contacts Blades IEC USA 50 0,6 0, ,20, ,470 2, ,830 4, ,30 7, V 300V 60 2, , , V 300V V 200V V 00V (*) V 900V (*) V 800V 60 2, , , V 300V (TTI) X 300V X V 200V X X V 00V (*) V 950V (*) V 850V 26 ( ) at 850 V ( 2 ) does not exist with blades

2 Main characteristics PSC 650 to 300VAC US and European standard Total I 2 Nominal Voltage Pre-arcing 000V Tested Breaking capacity Size U N (VAC) Ampere I 2 ms Un Power (W) Estimated B.C 300 ka Rating (A) (ka 2 s) (ka 2 s) IEC UL End contacts Blades IEC USA , V 300V X X 25 00V 50kA à 200V X V 00V X (*) V 900V , V 300V X X X X 200V 300V X 48 00V 200V X V 00V (*) 68 X 950V 000V (*) X (*) X (*) 86 X 900V 000V (*) 20 X (*) 20 X 850V 900V (*) 200 X (*) 203 X 690V 700V (*) 206 X 600V 650V V x V V (*) V (*) V (*) (*) V kA@ 250V x V V (*) V (*) V (*) V (*) (*) V (*) V ( ) at 850 V ( 2 ) does not exist with blades SCAC27

3 American Terminals End contacts Size Designation Reference Number Weight (g) Packaging Catalog Number A30URD 70 TTI 0063 A30URD 70 TTI 0080 A30URD 70 TTI 000 A30URD 70 TTI 025 A30URD 70 TTI 060 A30URD 70 TTI 0200 A30URD 70 TTI 0250 A30URD 70 TTI 0280 A30URD 70 TTI 035 A20URD 70 TTI 0350 A30URD 7 TTI 060 A30URD 7 TTI 0200 A30URD 7 TTI 0250 A30URD 7 TTI 0280 A30URD 7 TTI 035 A30URD 7 TTI 0350 A30URD 7 TTI 0400 A30URD 7 TTI 0450 A30URD 7 TTI 0500 A20URD 7 TTI 0550 A20URD 7 TTI 0630 A30URD 72 TTI 0280 A30URD 72 TTI 035 A30URD 72 TTI 0350 A30URD 72 TTI 0400 A30URD 72 TTI 0450 A30URD 72 TTI 0500 A30URD 72 TTI 0550 A30URD 72 TTI 0630 A20URD 72 TTI 0700 A20URD 72 TTI 0800 A30URD 73 TTI 035 A30URD 73 TTI 0350 A30URD 73 TTI 0400 A30URD 73 TTI 0450 A30URD 73 TTI 0500 A30URD 73 TTI 0550 A30URD 73 TTI 0630 A30URD 73 TTI 0700 A30URD 73 TTI 0800 A30URD 73 TTI 0900 ** A0URD 73 TTI 000 ** A00URD 73 TTI 00 ** A00URD 73 TTI 250 ** A090URD 73 TTI 400 ** A070URD 73 TTI 600 ** A065URD 73 TTI 800 ** Q3005 R3006 S3007 T3008 V3009 W30020 X3002 Y30022 Z30023 A30024 B30025 C30026 D30027 E30028 F30029 G30030 H3003 J30032 K30033 L30034 M30035 N30036 P30037 Q30038 R30039 S30040 T3004 V30042 W30043 X30044 Y30045 Z30046 A30047 B30048 C30049 D30050 E3005 F30052 G30053 H30054 J30055 K30056 L30057 M30058 N30059 Q R A30UD70TTI63 A30UD70TTI80 A30UD70TTI00 A30UD70TTI25 A30UD70TTI60 A30UD70TTI200 A30UD70TTI250 A30UD70TTI280 A30UD70TTI35 A20UD70TTI350 A30UD7TTI60 A30UD7TTI200 A30UD7TTI250 A30UD7TTI280 A30UD7TTI35 A30UD7TTI350 A30UD7TTI400 A30UD7TTI450 A30UD7TTI500 A20UD7TTI550 A20UD7TTI630 A30UD72TTI280 A30UD72TTI35 A30UD72TTI350 A30UD72TTI400 A30UD72TTI450 A30UD72TTI500 A30UD72TTI550 A30UD72TTI630 A20UD72TTI700 A20UD72TTI800 A30UD73TTI35 A30UD73TTI350 A30UD73TTI400 A30UD73TTI450 A30UD73TTI500 A30UD73TTI550 A30UD73TTI630 A30UD73TTI700 A30UD73TTI800 A30UD73TTI900 A0UD73TTI000 A00UD73TTI00 A00UD73TTI250 A090UD73TTI400 A070UD73TTI600 A065UD73TTI800 Size A B C D E± d G±0. P± , /6-27/32 3-7/32 -/ /32 5/6-8 23/64 5/ , / /64-3/6 2-29/32 5/6-8 23/64 23/ , ; (42mm **) /8 2-37/64 3-5/6 -/2 ; (-2/32 **) 2-29/32 3/8-6 9/32 23/ ,5 79, ; (52mm **) /6 3-/8 4-/2-3/6 ; (2-/6 **) 2-29/32 /2"-3 9/32 23/64 Note: Dimensions in mm Dimensions in inches Microswitches and threaded studs supplied separately P SCAC28

4 Multiplier coefficient K,4,2 0,8 0,6 * Left: Mean curve indicating variation of total I 2 t (I 2 t t ) and total operating time T t in accordance with working voltage U. Example: Fuse 350 A in size 70. I p = A U = 00 V At 000 V I 2 t t = A 2 s T t = 7 ms 0,4 0,2 At 00 V I 2 t t = x.3 = A 2 s T t = 7 x.3 = 7.9 ms * curve for fuses with I 2 t published at 850VAC Dissipated power U (V) Arc voltage P/Pn I/In Above left: Curve enabling calculation of dissipated power P by a fuse rated I N, as a function of the RMS current I, in multiples of I N, in steady state. Above right: Curve indicating peak arc voltage Um which may appear across fuse terminals as a function of working voltage U at cos ϕ = 0.5 SCAC34

5 Size 70 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Curves indicating pre-arcing time for each rated current as a function of RMS value of pre-arcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 70 Maximum values of total operating I 2 t and total operating times Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. SCAC35

6 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Size 7 Curves indicating pre-arcing time for each rated current as a function of RMS value of pre-arcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 7 Maximum values of total operating I 2 t and total operating times Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. 36

Size 72 Cut-off characteristics Below, right: Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p.

7 Size 72 Cut-off characteristics Below, right: Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Above, left: Curves indicating pre-arcing time for each rated current as a function of RMS value of prearcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 72 Maximum values of total operating I 2 t and total operating times Left: Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. SCAC37

8 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Size 73 Curves indicating pre-arcing time for each rated current as a function of RMS value of pre-arcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 73 Maximum values of total operating I 2 t and total operating times Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. SCAC38

Size 2x72 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p.

- Beyond 30 sec, small overloads must be eliminated by another device.

9 Size 2x72 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Curves indicating pre-arcing time for each rated current as a function of RMS value of pre-arcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 2X72 Maximum values of total operating I 2 t and total operating times Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. SCAC39

10 Cut-off characteristics Curves indicating for each rated current the peak value I c that the current may reach as a function of the prospective fault current I p. Size 2x73 Curves indicating pre-arcing time for each rated current as a function of RMS value of pre-arcing current I. - Tolerances on this current ± 8 %. - Beyond 30 sec, small overloads must be eliminated by another device. - Curve CC represents the maximum times taken by the associated device to clear small overloads; only its horizontal line is represented. Its oblique line must be plotted according to sketch, top right corner. - The intersection of the fuse and CC curves indicates the minimum breaking current I pm of the fuse. Size 2x73 Maximum values of total operating I 2 t and total operating times Horizontal curves indicating the maximum values of total operating I 2 t (I 2 t t ) as function of the prospective current I p at 000V or 850 V(*), cos ϕ = 0.5. The oblique lines indicate the corresponding total operating time T t, with pre-arcing time in brackets. SCAC40

11 DC working voltage possibilities Top: Curves indicating the maximum time constant L/R of the fault path as a function of the DC voltage U, for the rated currents in the sizes indicated in the table. Rated Curves (*) and Ipm ( ) corresponding to the rating current I N (A) 70 *Ipm 7 *Ipm 72 *Ipm 73 *Ipm 2x72 *Ipm 2x73 *Ipm (A) (A) (A) (A) (A) (A) 63 a a a a a 950 a a 300 a a 800 a b 2200 a 2000 a b 2600 a 2300 a 2200 a c 3000 a 2700 a 2600 a b 3500 a 3200 a b 4000 a 3800 a c 4800 a 4600 a c 5200 b 5000 a c 6400 b 6200 a 5300 a c 6800 a 6000 a c 8000 b 8000 a 6400 a b 9000 a 7600 a c 000 a 9200 a c 2000 b 0000 a c 3500 b 2400 a c 5000 c 3600 a c 6000 b b c c d d Ipm () values indicate the minimum breaking current in Amperes (A). Remark: When the fault current di/dt is very large, this condition can be exceeded. It is the case for faults occurring in voltage commutated inverters. Below: Curves indicating peak arc voltage Um which may appear across fuse terminals as a function of the DC working voltage U, for various time constant L/R of fault path. SCAC4

PSC ar sizes 7x - 650V to 300 VAC Microswitches PSC 3x &7x - MICROSWITCH SYSTEMS ADAPTED TO THE FOLLOWING FERRAZ SHAWMUT FUSES ONLY: - PSC sizes 30, 3, 32, 33, 2x32, 2x33 / 70, 7, 72, 73, 272, 273

12 PSC ar sizes 7x - 650V to 300 VAC Microswitches PSC 3x &7x - MICROSWITCH SYSTEMS ADAPTED TO THE FOLLOWING FERRAZ SHAWMUT FUSES ONLY: - PSC sizes 30, 3, 32, 33, 2x32, 2x33 / 70, 7, 72, 73, 272, 273 except plain blades - PSC LR sizes 33, 233, 73, PERMANENT INDICATION OF FUSE STATE: CONDUCTIVE MS 7V -5 BLOWN - MANUAL RESETTING - STANDRAD AND LOW ELECTRICAL LEVEL WITH DIFFERENT INSULATION LEVELS - BS TYPE FOR USE IN CORROSIVE ATMOSPHERE - MS 3V -5 UR AND MS 7V -5 UR TYPE UL ARE RECOGNIZED Main Characteristics Code AC Insulation voltage rating (***) Positive Current operating rating voltage/current Current Breaking Capacity Non inductive circuit Inductive circuit : L/R = 25ms 30V 0V 250V 30V 0V 250V AC voltage withstand test (*) Impulse voltage test Uimp.2/50 µs (**) Fire class according to UL 94 MS 3V -5 50/60 Hz 0 A 0 A 0 A 0 A 0 A 0 A 8,5 kv 4 kv MS 3V -5 UR MS 7V -5 MS 7V -5 UR MS 3V -5 BS MS 3V -9 BS MS 7V -5 BS MS 7V -9 BS MS 3V -5 ET MS 7V -5 ET 000 V 500V 000 V 500V 000V 500V 20 V 50 ma 0 V 0 ma 0 V 0 ma 0 A DC 50/60 Hz DC 50/60 Hz DC 8 A 0,4 A 0,2 A 0,5 A - 4 A 2 A 2 A 2 A 0,2 A A 0, A A 0,5 A 0,25 A 0,2 A 0, A A A 0,2 A - 2 kv 8,5 kv 2 kv 8,5 kv 2 kv 20 kv 4 kv 20 kv 4 kv 20 kv H.B * Between power circuit and microswitch terminals as per IEC 60 and 694 and NFC 6400 (50/60 Hz min duration in dry air) ** Between power circuit and microswitch terminals Uimp: impulse voltage as per IEC *** Between power circuit and microswitch terminals Warning: microswitch systems exclusively designed for FERRAZ SHAWMUT. PSC Fuses fitted a petented trip-indicator, saving use of EDV SCAC42

13 PSC ar sizes 7x - 650V to 300 VAC Microswitches for PSC 3x &7x Indication systems for PSC Fuse sizes 30 to 73 MS 3V These patented indication systems are exclusively hand resettable. 4 2 Fuse size Designation Ref. Number Indication style Weight (g) Pack. Catalog Number 42 X3004 MS3V-5 MS 3V -5 (fig.) MS 3V -5 UR X3004 Y30038 Standard NO-NC 34 MS3 V-5 MS3 V-5UR (fig. ) 39 30, 3 32, 33 MS 3V -5 BS (3) MS 3V -9 BS (4) W3003 T300 Low level NO-NC Double pole Low level MS3-V-5BS MS3V-9BS x position déclenchée switched position 0 X3004 MS3V MS 3V -5 ET (fig.2) R30009 (3) Same as fig. (4) Same dimensions as figure but with 2 microswitches side by side (9) Watertightness class Low level NO-NC IP 50 (9) x 0.5 MS3V-5 ETANCHE 0 4 (fig. 2) 2 R30009 MS3V-5 ET 32.7 MS 7V... Fuse size Designation Ref. Number Indication style Weight (g) Pack. Catalog Number MS 7V -5 (fig.5) MS 7V -5 UR J30002 Z30039 Standard NO-NC 45 MS7 V-5 MS7 V-5UR 4 2 K30003 MS7V-5BS 70, 7 72, 73 MS 7V -5 BS (3) MS 7V -9 BS (4) MS 7V -5 ET (fig.6) K30003 P30007 S3000 Low level NO-NC Double pole Low level Low level NO-NC IP 50 (9) MS7-V-5BS MS7V-9BS MS7V-5 ETANCHE 42 (fig. 5) 62,5 (7) Same as fig. 5 (8) Same dimensions as figure 5 but with 2 microswitches side by side (9) Watertightness class Warning: Microswitch systems exclusively designed for FERRAZ SHAWMUT PSC fuses fitted with a patented trip-indicator, saving use of EDV x 0.8 position déclenchée switched position x K30003 MS7V-5BS 32.7 (fig. 6) 4 2 S3000 MS7V-5 ET 32.7 SCAC43

Semiconductor (AC) fuses

Semiconductor (AC) fuses BS884 Fuses 6x27, 2X6x27, 250 VAC Extremely high breaking capacity fuses: protection of power semiconductors as per IEC standard 60269.1 and 4 250 V voltage COMPLYING WITH IEC gr class (s from 50 to 50