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1 66 grb 66 V AC grb - from up to 3 A Size: x38 The fuse preselection table below indicates: Fuse preselection Rated current Pre-arcing I²t Total I²t at 66VAC I N (A) I²t p (A²s) I²t (A²s) - rated current (or ) I N - pre-arcing I²t (I²t p ) at ms - total ope I²t (I²tt) at 66 V, cos ϕ=.5, and for a total ope time from 8 to ms - dissipated power P N at the rated current I N, and at.8 I N,in steady state - Nominal breaking capacity, checked by tests made in accordance with IEC standard. Dissipated power Peak arc voltage Breaking capacity at I N at.8 I N (V) I (ka)
2 66 grb Maximum values of total ope I²t and total ope times Arc voltage Multiplier coefficient
3 66 grb Time-current characteristics ( to 6 A) Time-current characteristics (8 to 3 A) -32 Cut-off characteristics Cut-off characteristics 3
4 66 grb DC working voltage possibilities Dimensions / Reference / Ref. No. Rating (A) Catalog Number Ref. Number 66 grb - A7 grb T3 W33 66 grb -,25,25 A7 g RB.25 T3 X33 Above: Curve indicating the maximum time constant L/R of the fault path as a function of the DC voltage U, for the rated currents from to 3 A of this range. Far left (top and bottom): Curves indicate, for each rated current, pre-arcing time as a function of RMS value of pre-arcing current I. Tolerances on this current: ±% = s from to 6 A ±9% = s from 8 to 3 A Fuses with gr characteristics can eliminate all overloads. They do not show any minimum breaking capacity but limit currents of non-operation or operation in compliance with standard VDE 636/23. Near left (top and bottom): Curves indicate, for each rated current, the peak value Ic that the current may reach as a function of prospective fault current Ip. 66 grb -,5,5 A7 grb.5 T3 Y332 Without trip-indicator Max. weight g 66 grb -2 2 A7 grb 2 T3 Z grb -2,5 2,5 A7 grb 2.5 T3 A grb -3 3 A7 grb 3 T3 B grb -4 4 A7 grb 4 T3 C grb -5 5 A7 grb 5 T3 D grb -6 6 A7 grb 6 T3 E grb -8 8 A7 grb 8 T3 F grb - A7 grb T3 G33 66 grb -2,5 2,5 A7 grb 2.5 T3 H33 66 grb -6 6 A7 grb 6 T3 J grb -2 2 A7 grb 2 T3 K grb A7 grb 25 T3 L grb -3 3 A7 grb 3T3 M grb A7 grb 32T3 Y33278 Packaging: per pieces Ø,3 ±, (.3/32 ) Note: fuses bear European and American reference. 38 ±,6 (-½ ) See Fuse Blocks and Fuse Holders, and Medium Voltage fuse clips 3
5 cp UR 66 V AC URC - URD from 6 up to A Sizes: 4x5-22x58 Voltage U N (VAC) 66 V EXTREMELY HIGH INTERRUPTING RATING FUSES: PROTECTION OF POWER SEMI CONDUCTORS COMPLYING WITH IEC STANDARD269. AND 4 66 V AC VOLTAGE RATING ar-class ACCORDING TO VDE AND IEC TWO MODELS ACCORDING TO NF C 632 AND 632 WITH AND WITHOUT BUILT-IN BLOWN FUSE TRIP-INDICATOR FOR SIZES 4 x 5 AND 22 x 58 UL RECOGNIZED Size 4 x 5 22 x 58 Class Current I N (A) () 5 () URC URD URD (EXCEPT 6 A)* 4 (2) 5 (2) MAIN CHARACTERISTICS Pre-arcing I 2 ms I 2 t p (A 2 s) Total clearing I 2 (A 2 s) 66 V 7.5* I N < I p < 3 I N I p 3 I N Watts loss.8 I N I N Tested interrupting 66 V 66 V 66 V * Without trip-indicator I 2 t : 5 A 2 s. () No trip-indicator available for this model. (2) Models available only with trip-indicator. Minimum ope voltage for built-in trip-indicator: 2 V. 32
6 cp UR All the fuses presented on this page are 4x5 - Without blown fuse indication Current Rating Catalog Number (except 6 A)* Ref. Number Ø 4,3 Ø 4,3 Ø 22, mini Ø 5 6 A 6.6 CP URC 4.5/6* K A 6.6 CP URC 4.5/8 S9392 A 6.6 CP URC 4.5/ T A 6.6 CP URC 4.5/2 V A 6.6 CP URC 4.5/6 W A 6.6 CP URC 4.5/2 X A 6.6 CP URC 4.5/25 Y A 6.6 CP URC 4.5/32 Z A 6.6 CP URC 4.5/4 A A 6.6 CP URC 4.5/5 B939 4x5 - With blown fuse trip-indicator Current Rating Catalog Number Ref. Number 22x58 - Without blown fuse indication 58 Weight : 8g Packaging : pieces Weight : 8g Packaging : pieces 6 A 6.62 CP URC 4.5/6* G858 8 A 6.62 CP URC 4.5/8 C939 A 6.62 CP URC 4.5/ D A 6.62 CP URC 4.5/2 E A 6.62 CP URC 4.5/6 F A 6.62 CP URC 4.5/2 G A 6.62 CP URC 4.5/25 H A 6.62 CP URC 4.5/32 J A 6.62 CP URD 4.5/4 T36 5 A 6.62 CP URD 4.5/5 V37 Current Rating Catalog Number Weight: 57 g Packaging: pieces Ref. Number 25 A 6.6 CP URD 22x58/25 B A 6.6 CP URD 22x58/32 Z A 6.6 CP URD 22x58/4 S A 6.6 CP URD 22x58/5 W A 6.6 CP URD 22x58/63 T A 6.6 CP URD 22x58/8 A94829 A 6.6 CP URD 22x58/ Y x58 - With blown fuse trip-indicator Current Rating Catalog Number Ref. Number Ø 22, mini Ø 5 25 A 6.62 CP URD 22x58/ 25 H A 6.62 CP URD 22x58/ 32 C A 6.62 CP URD 22x58/ 4 J A 6.62 CP URD 22x58/ 5 D A 6.62 CP URD 22x58/ 63 K9383 Weight: 57 g Packaging: pieces 8 A 6.62 CP URD 22x58/ 8 E93959 A 6.62 CP URD 22x58/ F9396 See Fuse Blocks and Fuse Holders section and Medium Voltage fuse clips 33
7 cp UR Time vs current characteristics 4x5 URC 4x5 URD 22x58 URD a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current. Corrective factor - Peak arc voltage Corrective factor Tolerance for mean pre-arcing current ± % 4x5 URC - URD 4x5 URC - URD Peak arc voltage The mean curves show the variation of the total clearing time (I 2 t t ) and the total clearing duration tt as a function of ope voltage U. This curve shows the peak value Um of the arc voltage which appears across the fuse-link as a function of the ope voltage cos ϕ =.5. K,2,8,6,4,2 22x58 URD 22x58 URD Um(V)
8 cp UR DC Application data 4x5 URC - URD 4x5 URC - URD L R (ms) L R (ms) x58 URD Um(V) Minimum breaking current: see time-current characteristics Um(V) x58 URD This curve indicates the permissible value of time constant L/R as a function of DC working voltage This curve shows the peak value Um of the arc voltage which appears across the fuse-link as a function of the ope voltage U. 35
9 cp URG 6 V - 66 V AC URGB - URGA - from 8 to A Sizes: 4x5-22x58 Voltage U N ( VAC ) 66 V EXTREMELY HIGH INTERRUPTING RATING FUSES: PROTECTION OF POWER SEMICONDUCTORS AS PER IEC STANDARD 269. AND 4 6 V - 66 V AC VOLTAGE RATING ar CLASS AS PER VDE AND IEC TWO MODELS COMPLYING WITH NF C 632 AND 632 WITH AND WITHOUT BUILT-IN BLOWN FUSE TRIP-INDICATOR FOR SIZES 4 x 5 AND 22 x 58 Size 4 x 5 22 x 58 Class Current I N (A) * MAIN CHARACTERISTICS Pre-arcing I 2 ms I 2 t p (A 2 s) Total clearing I 2 A 2 s 66 V Ip 3 I N Ip > 3 I N * URGB URGA Watts loss,8 I N I N Tested interrupting 2 66 V 2 66 V 6 V *Ope voltage limited to 6 V for the model with blown fuse trip-indicator / Total clearing I 2 6 V = 9 A 2 s Minimum ope voltage for built-in trip-indicator: 2 V 36
10 REFERENCES cp URG 4x5 - Without blown fuse trip-indicator Current Rating Catalog Number Ref. Number Ø 4,3 Ø 22,2 Ø 4,3 5 7 mini Ø 5 8 A 6 6 CP URGB 4.5/8 T 7833 A 6.6 CP URGB 4.5/ V A 6.6 CP URGB 4.5/2 W A 6.6 CP URGB 4.5/6 X A 6.6 CP URGB 4.5/2 Y A 6.6 CP URGB 4.5/25 Z A 6.6 CP URGB 4.5/32 A A 6.6 CP URGB 4.5/4 B A 6.6 CP URGB 4.5/5 C 784 4x5 - With blown fuse trip-indicator Current Rating Catalog Number Ref. Number 22x58 - Without blown fuse trip-indicator 58 5 Weight: 8 g Packaging: pieces Weight: 8 g Packaging: pieces 8 A 6.62 CP URGB 4.5/8 D 7842 A 6.62 CP URGB 4.5/ E A 6.62 CP URGB 4.5/2 F A 6.62 CP URGB 4.5/6 G A 6.62 CP URGB 4.5/2 H A 6.62 CP URGB 4.5/25 J A 6.62 CP URGB 4.5/32 K A 6.62 CP URGB 4.5/4 L A 6.62 CP URGB 4.5/5 M 785 Current Rating Catalog Number Weight: 57 g Packaging: pieces Ref. Number 25 A 6.6 CP URGA 22.58/25 C A 6.6 CP URGA 22.58/32 D A 6.6 CP URGA 22.58/4 E A 6.6 CP URGA 22.58/5 F A 6.6 CP URGA 22.58/63 G A 6.6 CP URGA 22.58/8 H 9525 A 6.6 CP URGA 22.58/ N x58 - With blown fuse trip-indicator Current Rating Catalog Number Ref. Number 58 7 mini Ø 5 25 A 6.62 CP URGA 22.58/25 T A 6.62 CP URGA 22.58/32 V A 6.62 CP URGA 22.58/4 W Ø 22,2 5 A 6.62 CP URGA 22.58/5 X A 6.62 CP URGA 22.58/63 Y Weight: 57 g Packaging: pieces 8 A 6.62 CP URGA 22.58/8 Z A 62 CP URGA 22.58/ N See Fuse Blocks and Fuse Holders section and Medium Voltage fuse clips 37
11 ELECTRICAL CHARACTERISTICS cp URG Time vs current characteristics a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 Tolerance of mean pre-arcing current ± % a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current. Tolerance for mean pre-arcing current ± 8%. 38
12 Corrective factor - Peak arc voltage cp URG Corrective factor Peak arc voltage K,2,8,6,4,2 K,2 URGB Um(V) URGA URGA Um(V) 2 URGB,8,6,4,2 Ip 5 In Ip > 5 In These mean curves show the variation of the total clearing time (I 2 t t ) and the total clearing duration tt as a function of ope voltage U. This curve shows the peak value Um of the arc voltage which appears across the fuse link as a function of ope voltage cos ϕ =.5. 39
13 cp grc-urc 6-69 V ~ grc - URC from to 63 A Size: 4 x 5 Voltage U N ( V ) 69 6 EXTREMELY HIGH INTERRUPTING-RATING FUSES: PROTECTION OF SEMICONDUCTORS COMPLYING WITH IEC STANDARD 269. AND 4 69 V VOLTAGE RATING (CURRENT RATING TO 5 A) AS PER IEC 33 gr CLASS (CURRENT RATING TO 5 A) AS PER VDE CLEARING ALL OVERLOADS - IMPROVED SAFETY AND PROTECTION - ENABLING SELECTIVE COORDINATION AMONG ALL DISTRIBUTION CIRCUIT FUSES ar CLASS (CURRENT RATING 63 A) ACCORDING TO VDE AND IEC TWO MODELS AS PER NF C 632 AND 632 WITH OR WITHOUT TRIP-INDICATOR grc fuses are 7VAC-DC UL Recognized Class grc URC Current I N ( A ) Pre-arcing I 2 ms I 2 t p (A 2 s).8/.3*.5/* 7.2/6.7* MAIN CHARACTERISTICS Total clearing I 2 UN I 2 t t (A 2 s) 3.5/.4* 6.7/4.3* 33/3* Watts loss.8 I N I N Tested interrupting k 69 V k 6 V Estimated interrupting 3k 69 V 3k 6 V * I 2 t values for fuses without trip-indicator. Minimum ope voltage for the trip-indicator : 2 V See Fuse Blocks and Fuse Holders section and Medium Voltage fuse clips 3
14 cp grc-urc 4 X 5 WITHOUT TRIP-INDICATOR Time vs current characteristics t (s) Ø 4,3 4 X 5 WITH TRIP-INDICATOR Ø 4, Weight: 8 g Packaging: pieces a= 3 A2=.6 B=.25 B2=.6 Cf3=.8 7 mini Ø 5 Weight: 8 g Packaging: pieces Current I N =63 A, ar class with CC limiting curve Catalog number 6,9 Cp grc 4.5 6,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc 4.5 6,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc ,9 Cp grc ,92 Cp grc 4.5 6,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc 4.5 6,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc ,92 Cp grc Cp URC C C a= 3 A2=.6 B=.25 B2=.6 Cf3=.8 Ref. number E 228 H 8473 J 8474 T 2299 S 2298 R 2297 Q 2296 P 2295 E N 2294 W 2289 M 2293 L 2292 F 228 L 8476 F 857 B A Z Y X W V V 2288 M N 2295 V 229 except 63A Tolerance for mean pre-arcing current These curves indicate, for each rated current, pre-arcing time vs. R.M.S. prearcing current ± 8% for current 6 to 63 ± % for current, 2, 4 A A 3 I (A)
15 cp grc-urc Total clearing I 2 t I 2 t (A 2 s) K.4 I 2 t corrective factor ms (5 ms) Ip (A) ms (2,8 ms) 8 ms (2 ms) 7 ms (,5 ms) 6 ms (,3 ms) 5 ms ( ms) 4 ms (,8 ms) 3 ms (,6 ms) 2 ms (,4 ms),5 ms (,3 ms) ms (,2 ms) 5-63 A 4 A 32 A 25 A 2 A 6 A 2 A A 8 A 6 A Horizontal curves show maximum values of total clearing I 2 t (I 2 t t ) for each rated current as a function of prospective current 69 V. cosϕ =.5 (for 63 6 V. cosϕ =.5). Oblique lines indicate total clearing duration Tt, with associated pre-arcing duration in brackets. 4 3 Current limitation curves I C (A) Peak arc voltage Um (V) Ic = 2.5 Ip Ic = 2 Ip 4 A 2 A I C (A) 2 Ic = 2.5 Ip Mean curves showing variation of total clearing time (I 2 t t ) and total clearing duration Tt as a function of ope voltage U A - 6 V 2- to 5 A - 69 V U (V) Ic = 2 Ip Curves showing peak value Um of arc voltage which appears across fuse-link as a function of ope voltage cos j =.5 U (V) 63 A 5 A 4 A 32 A 25 A 2 A 6 A 2 A A 8 A 6 A A Ip (A) Ip (A) Curves show, for each, value of peak let-through current I C as a function of available fault current Ip. 32
16 cp grc-urc DC Application data L/R (ms) U (V) Above. left and center: Curves indicate the permissible value of time constant L/R as a function of DC working voltage: - For,2 and 4 A (grc) Ip,6 I N 2- Ip,6 I N for grc only ( 6 to 5 A) 3- Ip 2,5 I N for grc and URC ( 6 to 63 A) OPTIMAL PROTECTION OF POWER EQUIPMENT Thanks to recent technological developments, Ferraz Shawmut today markets gr-class PROTISTOR fuses capable of clearing all types of overloads, from low multiples of current s up to very high shortcircuit currents. Enhanced performance enables these fuses to provide solutions to many previously unsolved problems in power electronics: protection of cables without the use of additional components, protection of equipment from fire hazards, selective coordination of different fuses within a single power distribution installation... Relay ar gr L/R (ms) NEW gr-class 3s t C A "ar" U (V) U (V) Example: A ar vs. A gr SELECTIVE COORDINATION gr-class semiconductor fuses can be utilized in association with gi and gg-class low voltage power distribution fuses of the same current, installed upstream. In a selectively coordinated distribution installation, melting is limited to the fuse associated with the faulted circuit, while upstream fuses remain intact. This prevents unnecessary down-time due to power blackouts in non-faulted branches. Example of selective coordination- C' 3A minimum interrupting current I 2h t A Um (V) Above, right: Curve indicates peak arc voltage Um which may appear across fuse terminals at working voltage U. A "gr" I gg A gr A gr A Before After M M ar-class vs. gr-class ar-class fuses feature a high minimum interrupting current as compared with their current. The primary time-current characteristic of ar-class fuses is the CC curve, above which another protection device must be associated. The gr-class fuse represents considerably improved performance in semiconductor protection. FERRAZ SHAWMUT EXPERTISE gr-class fuses should be used in the design of low voltage equipment and in the protection of power electronics equipment. Designers can often substitute a gr-class fuse for an ar-class fuse (x38, 4x5, 22x58, PSC and 7x49 DIN8 or BS 88-4) but the reverse is not true: an ar fuse can never replace a gr fuse. Start protecting your new equipment with gr-class fuses today. The application of gr class fuses, with current s less than Amps, offers enhanced protection, safety and reliability, along with reduced risk of replacement errors and assembly costs. 33
17 cp grc-urd 6-69 V ~ grc - URD from 2 to 35 A Size: 22 x 58 Voltage U N ( V ) 69 6 EXTREMELY HIGH INTERRUPTING RATING FUSES: PROTECTION OF SEMICONDUCTORS IN COMPLIANCE WITH IEC STANDARD 269. AND 4 69 V VOLTAGE RATING (CURRENT RATING 2 TO A) AS PER IEC 33 gr CLASS (CURRENT RATING 2 TO A) ACCORDING TO VDE CLEARING ALL OVERLOADS - IMPROVED SAFETY AND PROTECTION - ENABLING SELECTIVE COORDINATION AMONG ALL DISTRIBUTION CIRCUIT FUSES ar CLASS (CURRENT RATING 25 AND 35 A) AS PER VDE AND IEC TWO MODELS COMPLYING WITH NF C 632 AND 632 WITH OR WITHOUT TRIP-INDICATOR grc FUSES ARE 7VAC-DC UL RECOGNIZED Class grc URD Current I N ( A ) Pre-arcing I 2 ms I 2 t p (A 2 s) MAIN CHARACTERISTICS Total clearing I 2 UN I 2 t t (A 2 s) Watts loss.8 I N I N Tested interrupting k 69 V k 6 V Estimated interrupting 3k 69 V 3k 6 V Minimum ope voltage for the trip-indicator: 2 V See Fuse Blocks and Fuse Holders section and Medium Voltage fuse clips 34
18 cp grc-urd 22 X 58 WITHOUT TRIP-INDICATOR Current Catalog Number Ref. Number 22 X 58 WITH TRIP-INDICATOR Time vs current characteristics t (s) ø 22.2 Ø 22,2 ø ELECTRICAL CHARACTERISTICS a= 3 A2=.6 B=.25 B2=.6 Cf3=.8 Weight: 57 g Packaging: pieces 7 mini ø 5 Weight: 57 g Packaging: pieces grc Current t (s) 6,9 CP grc ,9 CP grc ,9 CP grc ,9 CP grc ,9 CP grc ,9 CP grc ,9 CP grc ,9 CP grc Catalog Number 6,92 CP grc ,92 CP grc ,92 CP grc ,92 CP grc ,92 CP grc ,92 CP grc ,92 CP grc ,92 CP grc CP URD CP URD C C a= 3 A2=.6 B=.25 B2=.6 Cf3=.8 C 2294 B 2296 A 2295 Z 2294 Y 2293 X 2292 Y 2282 W 229 Ref. Number D G 2292 F 2292 E 2299 D 2298 C X 2282 C 2297 A 2278 B 2279 except 25 and 35A URD I (A) These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current Tolerance for mean pre-arcing current ± 9% for all current s I (A)
19 cp grc-urd Total clearing I 2 t I 2 t (A 2 s) Ip (A) Above: Horizontal curves show, for each rated current, maximum values of total clearing I 2 t (I 2 t t ) as a function of prospective current 69 V. cosϕ =.5 ( V.cosϕ =.5) Oblique lines indicate total clearing duration Tt with associated pre-arcing duration in brackets. 4 3 ms (5 ms) ms (2,8 ms) Current limitation curves I C (A) 8 ms (2 ms) 7 ms (,5 ms) 6 ms (,3 ms) 5 ms ( ms) 4 ms (,8 ms) 3 ms (,6 ms) 2 ms (,4 ms),5 ms (,3 ms) ms (,2 ms) 35 A 25 A A 8 A 63 A 5 A 4 A 32 A 25 A 2 A I 2 t corrective factor Peak arc voltage Ic= 2.5 Ip Ic= 2 Ip 35 A 25 A A 8 A 63 A 5 A 4 A 32 A 25 A 2A K Um (V) 2 Mean curves showing variation of total clearing time (I 2 t t ) and total clearing duration Tt as a function of ope voltage U and 35 A 2-2 to A U (V) Curve showing peak value Um of arc voltage which appears across fuse-link as a function of ope voltage cos j =.5 U (V) Left: Curves show value of peak let-through current I C as a function of the available fault current Ip Ip (A) 36
20 cp grc-urd DC Application data L/R (ms) U (V) OPTIMAL PROTECTION OF POWER EQUIPMENT Thanks to recent technological developments, Ferraz Shawmut today markets gr-class PROTISTOR fuses capable of clearing all types of overloads, from low multiples of current s up to very high shortcircuit currents. Enhanced performance enables these fuses to provide solutions to many previously unsolved problems in power electronics: protection of cables without the use of additional components, protection of equipment from fire hazards, selective coordination of different fuses within a single power distribution installation... Relay ar 2 gr NEW gr-class s Example of selective coordinationt C A "ar" Um (V) U (V) Above: Curve indicates peak arc voltage Um which may appear across fuse terminals at working voltage U. Example: A ar vs. A gr SELECTIVE COORDINATION gr-class semiconductor fuses can be utilized in association with gi and gg-class low voltage power distribution fuses of the same current, installed upstream. In a selectively coordinated distribution installation, melting is limited to the fuse associated with the faulted circuit, while upstream fuses remain intact. This prevents unnecessary down-time due to power blackouts in non-faulted branches. C' 3A minimum interrupting current I 2h t A A "gr" I gg A gr A gr A Before After M M ar-class vs. gr-class ar-class fuses feature a high minimum interrupting current as compared with their current. The primary time-current characteristic of ar-class fuses is the CC curve, above which another protection device must be associated. The gr-class fuse represents considerably improved performance in semiconductor protection. FERRAZ SHAWMUT EXPERTISE gr-class fuses should be used in the design of low voltage equipment and in the protection of power electronics equipment. Designers can often substitute a gr-class fuse for an ar-class fuse (x38, 4x5, 22x58, PSC and 7x49 DIN8 or BS 88-4) but the reverse is not true: an ar fuse can never replace a gr fuse. Start protecting your new equipment with gr-class fuses today. The application of gr class fuses, with current s less than Amps, offers enhanced protection, safety and reliability, along with reduced risk of replacement errors and assembly costs. 37
21 cp URGD 6 V - 66 V AC URGD - from 63 up to 25A Size: 27x6 EXTREMELY HIGH INTERRUPTING RATING FUSES: PROTECTION OF POWER SEMICONDUCTORS ACCORDING TO IEC STANDARD 269. AND 4 6 V - 66 V AC VOLTAGE RATING ar- CLASS ACCORDING TO VDE AND IEC Voltage U N ( VAC ) Class Current I N ( A ) Pre-arcing I 2 ms I 2 t p (A 2 s) V URGD V URGD Minimum ope voltage for trip-indicator: 2 V MAIN CHARACTERISTICS Total clearing I 2 UN I 2 t t (A 2 s) Watts loss.8 I N I N Tested interrupting 2 66 V 2 6 V Ref. Numbers 27x6 - With blown fuse trip-indicatior Type Voltage Current Catalog Number Ref. Number Ø 27 6,3 7 Ø 5 URGD 66 V 63 A 6.62 CP URGD 27x6/ 63 A A 6.62 CP URGD 27x6/ 8 B7682 A 6.62 CP URGD 27x6/ C A 6.62 CP URGD 27x6/25 D A 6.62 CP URGD 27x6/6 E A 6.62 CP URGD 27x6/2 F76825 See Fuse Blocks and Fuse Holders section and Medium Voltage Fuse Clips URGD 6 V 25 A 62 CP URGD 27x6/25 W
22 cp URGD Time vs current characteristics K,2,8,6,4,2 Corrective factor 63 to 2A URGD A URGD K,2 Tolerance for mean pre-arcing current ± 8% These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current. Left: Mean curves showing variation of total clearing time (I 2 t t ) and the total clearing duration tt as a function of the ope voltage U. Um(V) 2 Um(V) 2 Peak arc voltage 63 to 2A URGD A URGD Left: Curves show peak value Um of arc voltage which appears across the fuse-link as a function of ope voltage cos ϕ =.5.,8,6,4,
23 6.62cp URQ URS - 2cp URQ 66 V - V AC URB - URQ - URS from 32 to 25 A Size: 27x6 EXTREMELY HIGH INTERRUPTING RATING FUSES: PROTECTION OF POWER SEMI CONDUCTORS ACCORDING TO IEC STANDARD 269. AND 4 66 V - V AC VOLTAGE RATING ar-class ACCORDING TO VDE AND IEC V URQ and V URB are UL RECOGNIZED Voltage U N (VAC) 66 V V Class Current I N (A) Pre-arcing I 2 ms I 2 t p (A 2 s) Total clearing I 2 UN I 2 t t (A 2 s) Watts loss,8 I N I N URQ URS URB MAIN CHARACTERISTICS Tested interrupting 2 66 V V * Minimum ope voltage for trip-indicator: 2 V 32
24 6.62cp URQ-URS - 2cp URB Ø 27 27x6 - With blown fuse trip-indicatior Type Voltage Current Catalog Number Ref. Number 5 A 63 A 8 A 6.62 CP URQ 27x6/ CP URQ 27x6/ CP URQ 27x6/ 8 N75958 V7639 W763 A 6.62 CP URQ 27x6/ R A 6.62 CP URQ 27x6/25 S A 6.62 CP URQ 27x6/6 X763 6,3 7 2 A 6.62 CP URQ 27x6/2 T A 6.62 CP URQ 27x6/25 T7638 Ø 5 URS 66 V 25 A 6 A 32 A 4 A 6.62 CP URS 27x6/ CP URS 27x6/6 2 CP URB 27x6/ 32 2 CP URB 27x6/ 4 P29865 Q29866 S8298 R8297 URB V 5 A 63 A 8 A A 25 A 6 A 7 A 2 CP URB 27x6/ 5 2 CP URB 27x6/ 63 2 CP URB 27x6/ 8 2 CP URB 27x6/ 2 CP URB 27x6/25 2 CP URB 27x6/6 2 CP URB 27x6/7 Q8296 P8295 N8294 M8293 L8292 K829 Z8338 See Fuse Blocks and Fuse Holders section and Medium Voltage fuse clips URQ 66 V Except 25 and 6A URS 32
25 6.62cp URQ - 2cp URB Time vs current characteristics a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =,8 a = 3 B =,25 A2 =,6 B2 =,6 Cf3 =, I (A) These curves indicate, for each rated current, pre-arcing time vs. R.M.S. pre-arcing current. Tolerance for mean pre-arcing current ± 8%
26 k Semiconductor Fuses 6.62cp URQ - 2cp URB Peak arc voltage 5 to 2 A URQ 25 A URQ 32 to7 A URB 25-6A URS 5 Um(V) 2 Um(V) 2 Um(V) 2 3 These curves show peak value Um of arc voltage which appears across the fuse-link as a function of ope voltage cos ϕ =.5. Corrective factor 5 to 2 A URQ 25 A URQ 32 to7 A URB K K K,2,8,6,4, ,2,8,6,4 Above: Mean curves show variation of total clearing time (I 2 t t ) and total clearing duration tt as a function of ope voltage U. DC Application data, ,2,8,6,4, Um (V) U (V) 25-6A URS U (V) L R (ms) 8 In <= 6 A In <= 2 A In <= 25 A 3 2 Left: Curves indicate permissible value of time constant L/R as a function of the DC working voltage
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