NH (H.R.C) FUSES AND FUSE BASES

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Clarence Watson
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NH (H.R.C) FUSES AND FUSE BASES NH (H.R.C) Fuses NHC-FB (A...A) NH-FB (A...A) NH-FB (A...A) NH-FB (8A...4A) NH-FB (A...A) NH-FB (A...A) NH (H.R.C) Fuse Bases STEATIT NH-FA NH-FA NH-FA NH-FA NH-FA CONTENTS General Information About NH (H.

1 NH (H.R.C) FUSES AND FUSE BASES NH (H.R.C) Fuses NHC-FB (A...A) NH-FB (A...A) NH-FB (A...A) NH-FB (8A...4A) NH-FB (A...A) NH-FB (A...A) NH (H.R.C) Fuse Bases STEATIT NH-FA NH-FA NH-FA NH-FA NH-FA CONTENTS General Information About NH (H.R.C) Fuses Super Flink NH Fuses Bases Technical Characteristic Dimension and Order Codes of NH (HRC) Fuses Technical Characteristic Dimension and Order Codes of NH (HRC) Fuse Bases Maksimum Power Loses Table 4 - /

2 GENERAL INFORMATION ABOUT NH (H.R.C) FUSES General : Fuses are protective device in which the melting or more fusible elements open a circuit and interrupt the current if the current exceeds a set value for a given length of time. Federal NH (H.R.C.) fuses and fuse bases are produced in according to VDE, IEC 9/EN 9, DIN 4 standards and CE certificate. According to the above mentioned standards the H.R.C. fuses should have a higher breaking capacity than ka. Federal NH (H.R.C.) fuses have a breaking capacity of ka. Federal has a wide range of H.R.C. products. Rated voltages are V. AC and 44 V DC. Rated current is up to A. Our products protect your panels, cables and installation reliability Figure- gives the time-current character st c of the fuses. The curves show that fuse s response time(+) which is connected with load current. It is clear from the figure that at higher current rates the response time is shorter. Federal NH fuses have characteristic of delayed and it is strong to Asynchrone motor s openning current. It makes protection against short circuit, boasting current and opens circuit immediately. gl/gg mark s mean is line protection and this class of fuses are used for protection of cabel and conductors. From the time-current curve it is clear that fuses can operate to. time higher of its rated value and breaking capacity of circuit for a xin value in seconds. The melting wires (fusible element) of the fuses cartridges are produced in different shape and sizes for various current rated. Over the melting wire small chambers are put together. In case of short-circuit and over load different section with the same diameter melt down and form partical sparks. As a result of the short-circuit current is extinguished and the heat is evenly transferred along the fuse. The external body of the fuses should be resistant to the high current temperature and pressure caused arcs during the melting of the fuse wire. Therefore for this wire to melt, the current energy should be higher than the wires maximum resistance. During the process of the wire melting along and inside the length of the fuse body, the current continues to flow firstly as liquefied metal and secondly as steamed metal before eventually losing it s energy. This is visible in the form of an arc (Fig-) and therefore there is an immense increase of heat and pressure during this action on the inside of the fuse body. The fuse body must hold resistance to such actions otherwise will be damaged and lose its purpose. To avoid such circumstance the material used for the fuse body should be made accordingly to the IEC 7 standards. Federal fuses cartridge are produced to withstand shock temperatures and dynamic stresses. Federal fuses cartidge contacts are made from special brass and silver plated. In time the silver plate becomes dark colored. However,this is not important,because silver sulphur with current heat becomes conductive. lo: passing current, lk(t): short circuit current that will pass, if a metallic bridge be inside of fuse. lp: peak value of the short circuit current ts: fusion time t: extinguishing time Ip Ik(t) Quartz Sand : Inside of the body is Quartz Sand. This distinctiveness of the sand is that it is high pure, clean and unhumid. Also the sand is tightly contained in the fuse using a vibration method to lock out any air and maintain the sufficiency of sand. During melting of the wire, the sand helps cool down the arc and insulates the distance between the broken fuse wire points for quicker and more efficient energy decrease. NH(HRC) Fuses Bases : Fuse bases are produced in five size and steatit or cartridge according to request of customers. The bases contacts are produced and size with clemence or screw, other sizes have only screw connection The bases contacts are made of electrolytic copper and reinforced with steel segments in addition to ts own compression and elasticity characteristic. Grabbing capacity of conducts is higher than other bases. If bases are put together side by side. Pertinaks seperaters which is given as accessory is used for rising of phase isolation. When fuses are placed in their bases, the fuses blade must sit on base exactly. Otherwise incapable contact will cause loss of resistance, temperature and power, failures. Conductors must be mounted for bases and cross-sections which is suitable to standars. Order Codes Size 8CB-A- 8CB-A- 8CB-A- Selective Protection (Selectivity) Selectivity means that any fault occurs in a system is eliminated by the close protection equipment so that the rest of the system continuous ts normal operation. Accordig to gl/gg operation class, NH fuses bases which have % nominal circuit selectivly in high short circuit current. For selectivity,fuses must be choosen according to table (Fig-) nd FUSE SELECTIVE PROTECTION (SELECTIVITY) NOMINAL CURRENT OF th FUSE three phase, selective at 8 V. three phase, selective at V. Phase seperator dimensions(mm) NOMINAL CURRENT th FUSE th FUSE a Selective Table b Fig- Voltage Current Io ts tl Fig - Diagram of current and voltage changing when the damage current is broken by the fuse. / -

3 GENERAL INFORMATION ABOUT NH (H.R.C) FUSES Opening time Second,,, Max. value of current ka peak 7 7 Expected current A 4 A A A A ka eff Ip 7 Fig- Loading current (effective value) Ampere Time - current characteristics of NH (H.R.C) fuses gl/gg Fig-4 Breaking current diagram NH SUPER FLINK FUSES NH Super flink fuses : The super flink fuses are used to protected the power electronic element, such as diode, thrystor in AC and DC against overcurrent and short-circuit. Pure silver materials are used as a melting lace wire. This is the most important difference between NH (H.R.C) (fusable cut out) fuses, and LV NH (H.R.C.) fuse flinks. Increasing of temperature of super flink fuses is very high in comparison with line protection device (in operating class gl, Gg) as shown in time-current characteristics curve. (Fig-) So that precise protection is supplied at the value of rated current. This means that these super flink fuses take into account all aspects of electrical safety. Operating characteristic: Super flink (Rapid) Rated voltage : AC V. Operating class : gr Breaking capacity : ka (effective) Dimensions of super flink fuses are same as NH fuses. Rated current : NH super flink fuses are manufactured in the following size and with the following rated currents.,, at size and from A. to 4 A. Opening time Second Fig- Load current Ampere Time - current characteristics of super flink NH (H.R.C) fuses "gr" 4 Order codes : Type NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB Size Rated current A A 4 A A A 8 A A A A A Order Code 9CB-BH- 9CB-BH- 9CB-BH-4 9CB-BH- 9CB-BH- 9CB-BH-8 9CB-BH- 9CB-BH- 9CD-BH- 9CD-BH- Type NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB NHG-FB Size Rated current A A A A A 8 A A A 4 A A Order Code 9CD-BH- 9CD-BH- 9CD-BH- 9CE-BH- 9CE-BH- 9CE-BH-8 9CE-BH- 9CE-BH- 9CE-BH-4 9CE-BH- - /

9CA-BG- 9CA-BG-4 9CA-BG- 9CA-BG- 9CA-BG-8 9CA-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG-* 9CB-BG-4 9CB-BG- 9CB-BG- 9CB-BG-8 9CB-BG-

9CD-BG- 9CE-BG-8* 9CE-BG-* 9CE-BG-* 9CE-BG- 9CE-BG- 9CE-BG- 9CE-BG- 9CE-BG-4 9CF-BG-* 9CF-BG- 9CF-BG-4 9CF-BG- 9CF-BG- Size Rated current (A) C C C C C C C

4 TECHNICAL CHARACTERISTICS, DIMENSIONS and ORDER CODES of NH (H.R.C) FUSES Compact NHC-FB NH-FB NH-FB NH-FB NH-FB Order code 9CA-BG- 9CA-BG- 9CA-BG- 9CA-BG- 9CA-BG- 9CA-BG- 9CA-BG-4 9CA-BG- 9CA-BG- 9CA-BG-8 9CA-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG- 9CB-BG-* 9CB-BG-4 9CB-BG- 9CB-BG- 9CB-BG-8 9CB-BG- 9CB-BG- 9CB-BG- 9CC-BG- 9CC-BG- 9CC-BG-4 9CC-BG- 9CC-BG- 9CC-BG-8 9CC-BG- 9CC-BG- 9CC-BG- 9CD-BG-* 9CD-BG-* 9CD-BG-8 9CD-BG- 9CD-BG- 9CD-BG- 9CD-BG- 9CD-BG- 9CE-BG-8* 9CE-BG-* 9CE-BG-* 9CE-BG- 9CE-BG- 9CE-BG- 9CE-BG- 9CE-BG-4 9CF-BG-* 9CF-BG- 9CF-BG-4 9CF-BG- 9CF-BG- Size Rated current (A) C C C C C C C C C C C Quantity/ box Kg./ box DIMENSIONS (mm) a a a a4 b e e e e e e e e e NH-FB Note : * The signed currents are manufactured on request. /4 -

C) FUSE BASES NH-FA 9CB-C - () 9CB-A - () C - with

current : A Quantity/box : :.79 (). () a: e:. b:.

9CC-C - () C - with current : A Quantity/box : :.

NH-FA NH-FA 9CD-CC- () 9CD-AC- () Size : Rated

5 TECHNICAL CHARACTERISTICS, DIMENSIONS and ORDER CODES of NH (H.R.C) FUSE BASES NH-FA 9CB-C - () 9CB-A - () C - with screw K - with clemens X - with screw Size : Rated current : A Quantity/box : :.79 (). () a: e:. b:. f : M8 c: 4 g: d: h: 7. 9CC-C - () C - with screw K - with clemens X - with screw Size : Rated current : A Quantity/box : :. a: 7 e:. b: f : M8 c: 4. g: d: h: 7. NH-FA NH-FA 9CD-CC- () 9CD-AC- () Size : Rated current : A Quantity/box : :.7 ().84 () a: f : M b: 47. g: c: 8 h:. d: 7 k: e: NH-FA 9CE-CC- () 9CE-AC- () Size : Rated current : 4 A Quantity/box : :.74 ().9 () a: f : M b: 47. g: c: 88 h:. d: k: e: NH-FA 9CF-CC- () 9CF-AC- () Size : Rated current : A Quantity/box : :.8 ().7 () a: 4 f : M b: 47. g: c: 99 h:. d: k: e: 7 - /

6 MAXIMUM POWER LOSSES TABLE Power Losses : Power losses of NH Fuse which reaches the steady state temperature, when the rated current passing through the circuit. When the rated current passing through fuses, the temperature of connecting terminal (i.e for NH (HRC) size and A rated current) should not exceed K. The power losses of Federal Fuses are below the IEC standars. This values are shown at the table on below table comparatively. Size Rated current (A) For and size, fuse bases are produced in three models for easy connection to cables. With double side screw : For multi wires or bars (Fig-a). With double side bridge terminal : For single core wires (Fig-b). With one side screw and another side terminal : For single core wires or bars (Fig-c). Maximum power losses values TS EN 9 IEC 9 VDE Federal W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W 4 W 4 W 4 W 4 W 4 W 4 W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W 4 W 4 W 4 W 4 W 4 W 4 W 7. W 7. W 7. W 7. W 7. W 7. W 7. W 7. W 7. W 7. W 7. W W W W W W W W W W W W W W W W W W W 4 W 4 W 4 W 4 W 4 W 4 W.7 W. W. W.7 W. W 4. W 4. W.8 W. W 8. W. W. W.4 W 4. W. W.7 W 7. W 7. W 8. W. W 4. W. W. W 7. W 7. W 9. W. W. W 7. W. W. W. W 7. W. W. W. W. W. W. W. W 4. W Fuse should be fixed properly to fuse base. Otherwise there can be an increase in the contact resistance, heating of contact, power losses and many other kind of faults. (Bulk Moulding Compound) It is moulding material which is look like dough, reinforce with rather tall fiber and it is a composite material which has adjustment features through changing contribution material according to demand features. / NH -FA NH -FA NH -FA NH -FA NH -FA NH -FA Fig-a Fig-b Fig-c is from termoset plastic family and it has the same features with bakelite and melamine. It s process conditions and products have superiority and it is durable for dynamic power and thermal shock. -

NH fuse-links gg 500VAC size 000, 00, 0, 1, 2, 3

NH fuse-links gg 500VAC size 000, 00, 0, 1, 2, 3 IEC LV NH fuse links with blade contacts The NH system is classified among plug-in fuse systems and is composed of: fuse-base, (possibly including terminal covers and phase barriers) fuse-link with blade