bussmann 高压电机保护熔断器
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bussmann 高压电机保护熔断器
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Motor Fuse Links
British Standard Motor Fuse Links North American Motor Fuse Links
DIN Dimensioned Motor Fuse Links
Motor fuse links comply with
IEC60282-1, IEC644 and BS5907.
Available in DIN 43625 and BS2692 dimensions.
Sold in a wide range of ratings from:
3.6 kV – 5 to 450 A
7.2 kV – 5 to 355 A
North American dimensioned products also
available. 2R to 24R ratings.
Bussmann Motor Fuse Links
The Bussmann range of motor fuse links are designed to meet the specific requirements necessary for motor
protection. During the starting cycle of direct on-line motors, the fuse elements will reach a considerably higher
temperature than during normal operation; (this is due to the the high amount of current the motor will draw as it starts,
typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements and
could cause premature operation of the fuse.
Bussmann motor fuse links encompass an advanced design to minimise this effect. This therefore, negates the need
to over specify the fuse rating due to high values of of motor starting current.
Bussmann motor fuse links operate extremely quickly under heavy fault currents, resulting from the time / current
characteristic. Low power dissipation ensures low temperature rise, important in multi-tier starters for example.
Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and 2.4kV circuits.
17 For more information visit our websitewww.bussmann.comMotor Fuse Links
Application
Fuse Links provide short circuit protection in motor circuits to both the motor starter and cables from the starter to the motor.
Overload protection is provided by the motor starter, generally by an overload relay and contactor. Combination striker tripping
may also form part of associated equipment which houses the fuse links and motor starters.
Application Procedure
For any motor the fuse current rating is determined by magnitude and duration of starting current, except in a few situations
where the starting currents are very light. The fuse current rating should therefore be selected as follows:
Direct-on-line Starting
In the absence of specific information the starting current can usually be taken to be six times the motor’s full load current.
The starting time will depend on the type of the drive but will be approximately as follows:
Pump Motors - 6 seconds
Mill Motors - 10 to 15 seconds
Fan Motors - 60 seconds
These are average values and the appropriate figures for starting current and starting time for actual installation should be obtained
wherever possible.
Multiply the starting current by 1.7 and using this value of current and the starting time, (it is recommended that a minimum
time of 5 seconds be adopted), plot this point on the time-current characteristics of the fuse link. The correct current rating
of the fuse is then chosen as being the one immediately to the right of the point so plotted. The chosen fuse must also have
a current rating of at least 1.3 times the full-load current of the associated motor.
The rating chosen will be adequate for normal applications where the associated motor is not started more than twice in given
period of one hour.
For applications using more frequent starting duties, a greater derating factor must be applied as shown in the following table.
Maximum2 starts per hour - Derating factor 1.7 Maximum8 starts per hour - Derating factor 2.1
Maximum4 starts per hour - Derating factor 1.9 Maximum 16 starts per hour - Derating factor 2.4
Assisted Starting
A similar method of fuse selection may be used as for direct-on-line starting (see above), but it must be noted that the
normal running current of the motor is likely to be closer in value to the nominal current rating of the fuse than for direct-on-
line applications.
The rating of fuse chosen will need to be appreciably greater than the motor running current to allow for restricted cooling inside
control gear cubicles, particularly where multi-tier starters are involved. In case of doubt refer to Bussmann for further guidance.
Note
For applications involving more frequent starting duties than 16 times per hour or where unusual duty cycles are involved,
consult Bussmann application engineers for advice.
For more information visit our websitewww.bussmann.com 18Motor Fuse Links
Selection Tables
Table of ratings for motor fuses 3.6 - 7.2kV to British Standard dimensions
Voltage Current Breaking Minimum Cold resistance and watts loss Joule Length Diameter Weight
Rating Rating Capacity Breaking Current in free air at rated current Intergral ø
Part Number
(I2t)
Un In I1 I3 A2s
kV A kA A m Ω W PM rein -Aim rcu im ng ToM taa l x Cim leu arm ing mm mm kg
3.6WJON65 3.6 5 50 13 148 5 2.0X101 1.6X103 192 35 0.54
3.6WJON66.3 3.6 6.3 50 24 56.3 8 1.6X102 1.3X103 192 35 0.54
3.6WJON610 3.6 10 50 24 56.3 8 1.6X102 1.3X103 192 35 0.54
3.6WJON616 3.6 16 50 56 33.1 12 1.7X102 1.4X103 192 35 0.54
3.6WJON620 3.6 20 50 56 22.1 12 3.9X102 3.2X103 192 35 0.54
3.6WJON625 3.6 25 50 70 17.7 15 6.1X102 4.9X103 192 35 0.54
3.6WJON631.5 3.6 31.5 50 112 10.1 14 1.2X103 9.8X103 192 35 0.54
3.6WJON640 3.6 40 50 112 7.54 17 2.1X103 1.7X104 192 35 0.54
3.6WJON650 3.6 50 50 140 6.03 21 3.2X103 2.6X104 192 35 0.54
3.6WDOH650 3.6 50 50 180 5.36 20 1.8X103 2.4X104 192 51 1.1
3.6WDOH663 3.6 63 50 225 3.68 21 3.8X103 4.5X104 192 51 1.1
3.6WDOH680 3.6 80 50 288 2.88 27 6.3X103 8.0X104 192 51 1.1
3.6WDOH6100 3.6 100 50 360 2.16 31 9.8X103 1.1X105 192 51 1.1
3.6WDOH6125 3.6 125 50 450 1.73 39 1.5X104 2.2X105 192 51 1.1
3.6WFOH6160 3.6 160 50 600 1.28 47 3.1X104 6.2X105 192 76 2.1
3.6WFOH6200 3.6 200 50 600 0.938 52 5.7X104 1.1X106 192 76 2.1
3.6WDFHO50 3.6 50 50 152 6.61 21 1.8X103 2.4X104 254 51 1.46
3.6WDFHO63 3.6 63 50 171 5.03 28 3.1X103 4.5X104 254 51 1.46
3.6WDFHO80 3.6 80 50 190 3.52 31 6.3X103 8.0X104 254 51 1.46
3.6WDFHO100 3.6 100 50 190 2.87 39 9.5X103 1.2X105 254 51 1.46
3.6WDFHO125 3.6 125 50 190 2.44 53 1.3X104 1.8X105 254 51 1.46
3.6WFFHO160 3.6 160 50 300 1.53 54 3.4X104 4.1X105 254 76 3.2
3.6WFFHO200 3.6 200 50 300 1.24 67 5.1X104 7.2X105 254 76 3.2
3.6WKFHO250 3.6 250 50 520 0.653 57 1.8X105 2.4X106 254 76 3.2
3.6WKFHO315 3.6 315 50 650 0.435 60 4.1X105 5.0X106 254 76 3.2
3.6WKFHO355 3.6 355 50 820 0.345 59 6.4X105 7.0X106 254 76 3.2
3.6WKFHO400 3.6 400 50 820 0.345 76 6.4X105 7.0X106 254 76 3.2
3.6WFGHO31.5 3.6 31.5 50 151 18.4 25 4.5X102 6.0X103 359 76 4.1
3.6WFGHO40 3.6 40 50 151 13.9 31 8.0X102 1.2X104 359 76 4.1
3.6WFGHO50 3.6 50 50 151 9.24 32 1.8X103 2.2X104 359 76 4.1
3.6WFGHO63 3.6 63 50 151 6.93 38 3.2X103 4.5X104 359 76 4.1
3.6WFGHO80 3.6 80 50 170 5.47 48 5.1X103 7.5X104 359 76 4.1
3.6WFGHO100 3.6 100 50 212 4.40 62 7.9X103 1.2X105 359 76 4.1
3.6WFGHO125 3.6 125 50 212 3.60 79 1.2X104 1.7X105 359 76 4.1
3.6WFGHO160 3.6 160 50 300 2.16 75 3.4X104 4.2X105 359 76 4.1
British Standard Motor Fuse Links North American Motor Fuse Links
DIN Dimensioned Motor Fuse Links
Motor fuse links comply with
IEC60282-1, IEC644 and BS5907.
Available in DIN 43625 and BS2692 dimensions.
Sold in a wide range of ratings from:
3.6 kV – 5 to 450 A
7.2 kV – 5 to 355 A
North American dimensioned products also
available. 2R to 24R ratings.
Bussmann Motor Fuse Links
The Bussmann range of motor fuse links are designed to meet the specific requirements necessary for motor
protection. During the starting cycle of direct on-line motors, the fuse elements will reach a considerably higher
temperature than during normal operation; (this is due to the the high amount of current the motor will draw as it starts,
typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements and
could cause premature operation of the fuse.
Bussmann motor fuse links encompass an advanced design to minimise this effect. This therefore, negates the need
to over specify the fuse rating due to high values of of motor starting current.
Bussmann motor fuse links operate extremely quickly under heavy fault currents, resulting from the time / current
characteristic. Low power dissipation ensures low temperature rise, important in multi-tier starters for example.
Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and 2.4kV circuits.
17 For more information visit our websitewww.bussmann.comMotor Fuse Links
Application
Fuse Links provide short circuit protection in motor circuits to both the motor starter and cables from the starter to the motor.
Overload protection is provided by the motor starter, generally by an overload relay and contactor. Combination striker tripping
may also form part of associated equipment which houses the fuse links and motor starters.
Application Procedure
For any motor the fuse current rating is determined by magnitude and duration of starting current, except in a few situations
where the starting currents are very light. The fuse current rating should therefore be selected as follows:
Direct-on-line Starting
In the absence of specific information the starting current can usually be taken to be six times the motor’s full load current.
The starting time will depend on the type of the drive but will be approximately as follows:
Pump Motors - 6 seconds
Mill Motors - 10 to 15 seconds
Fan Motors - 60 seconds
These are average values and the appropriate figures for starting current and starting time for actual installation should be obtained
wherever possible.
Multiply the starting current by 1.7 and using this value of current and the starting time, (it is recommended that a minimum
time of 5 seconds be adopted), plot this point on the time-current characteristics of the fuse link. The correct current rating
of the fuse is then chosen as being the one immediately to the right of the point so plotted. The chosen fuse must also have
a current rating of at least 1.3 times the full-load current of the associated motor.
The rating chosen will be adequate for normal applications where the associated motor is not started more than twice in given
period of one hour.
For applications using more frequent starting duties, a greater derating factor must be applied as shown in the following table.
Maximum2 starts per hour - Derating factor 1.7 Maximum8 starts per hour - Derating factor 2.1
Maximum4 starts per hour - Derating factor 1.9 Maximum 16 starts per hour - Derating factor 2.4
Assisted Starting
A similar method of fuse selection may be used as for direct-on-line starting (see above), but it must be noted that the
normal running current of the motor is likely to be closer in value to the nominal current rating of the fuse than for direct-on-
line applications.
The rating of fuse chosen will need to be appreciably greater than the motor running current to allow for restricted cooling inside
control gear cubicles, particularly where multi-tier starters are involved. In case of doubt refer to Bussmann for further guidance.
Note
For applications involving more frequent starting duties than 16 times per hour or where unusual duty cycles are involved,
consult Bussmann application engineers for advice.
For more information visit our websitewww.bussmann.com 18Motor Fuse Links
Selection Tables
Table of ratings for motor fuses 3.6 - 7.2kV to British Standard dimensions
Voltage Current Breaking Minimum Cold resistance and watts loss Joule Length Diameter Weight
Rating Rating Capacity Breaking Current in free air at rated current Intergral ø
Part Number
(I2t)
Un In I1 I3 A2s
kV A kA A m Ω W PM rein -Aim rcu im ng ToM taa l x Cim leu arm ing mm mm kg
3.6WJON65 3.6 5 50 13 148 5 2.0X101 1.6X103 192 35 0.54
3.6WJON66.3 3.6 6.3 50 24 56.3 8 1.6X102 1.3X103 192 35 0.54
3.6WJON610 3.6 10 50 24 56.3 8 1.6X102 1.3X103 192 35 0.54
3.6WJON616 3.6 16 50 56 33.1 12 1.7X102 1.4X103 192 35 0.54
3.6WJON620 3.6 20 50 56 22.1 12 3.9X102 3.2X103 192 35 0.54
3.6WJON625 3.6 25 50 70 17.7 15 6.1X102 4.9X103 192 35 0.54
3.6WJON631.5 3.6 31.5 50 112 10.1 14 1.2X103 9.8X103 192 35 0.54
3.6WJON640 3.6 40 50 112 7.54 17 2.1X103 1.7X104 192 35 0.54
3.6WJON650 3.6 50 50 140 6.03 21 3.2X103 2.6X104 192 35 0.54
3.6WDOH650 3.6 50 50 180 5.36 20 1.8X103 2.4X104 192 51 1.1
3.6WDOH663 3.6 63 50 225 3.68 21 3.8X103 4.5X104 192 51 1.1
3.6WDOH680 3.6 80 50 288 2.88 27 6.3X103 8.0X104 192 51 1.1
3.6WDOH6100 3.6 100 50 360 2.16 31 9.8X103 1.1X105 192 51 1.1
3.6WDOH6125 3.6 125 50 450 1.73 39 1.5X104 2.2X105 192 51 1.1
3.6WFOH6160 3.6 160 50 600 1.28 47 3.1X104 6.2X105 192 76 2.1
3.6WFOH6200 3.6 200 50 600 0.938 52 5.7X104 1.1X106 192 76 2.1
3.6WDFHO50 3.6 50 50 152 6.61 21 1.8X103 2.4X104 254 51 1.46
3.6WDFHO63 3.6 63 50 171 5.03 28 3.1X103 4.5X104 254 51 1.46
3.6WDFHO80 3.6 80 50 190 3.52 31 6.3X103 8.0X104 254 51 1.46
3.6WDFHO100 3.6 100 50 190 2.87 39 9.5X103 1.2X105 254 51 1.46
3.6WDFHO125 3.6 125 50 190 2.44 53 1.3X104 1.8X105 254 51 1.46
3.6WFFHO160 3.6 160 50 300 1.53 54 3.4X104 4.1X105 254 76 3.2
3.6WFFHO200 3.6 200 50 300 1.24 67 5.1X104 7.2X105 254 76 3.2
3.6WKFHO250 3.6 250 50 520 0.653 57 1.8X105 2.4X106 254 76 3.2
3.6WKFHO315 3.6 315 50 650 0.435 60 4.1X105 5.0X106 254 76 3.2
3.6WKFHO355 3.6 355 50 820 0.345 59 6.4X105 7.0X106 254 76 3.2
3.6WKFHO400 3.6 400 50 820 0.345 76 6.4X105 7.0X106 254 76 3.2
3.6WFGHO31.5 3.6 31.5 50 151 18.4 25 4.5X102 6.0X103 359 76 4.1
3.6WFGHO40 3.6 40 50 151 13.9 31 8.0X102 1.2X104 359 76 4.1
3.6WFGHO50 3.6 50 50 151 9.24 32 1.8X103 2.2X104 359 76 4.1
3.6WFGHO63 3.6 63 50 151 6.93 38 3.2X103 4.5X104 359 76 4.1
3.6WFGHO80 3.6 80 50 170 5.47 48 5.1X103 7.5X104 359 76 4.1
3.6WFGHO100 3.6 100 50 212 4.40 62 7.9X103 1.2X105 359 76 4.1
3.6WFGHO125 3.6 125 50 212 3.60 79 1.2X104 1.7X105 359 76 4.1
3.6WFGHO160 3.6 160 50 300 2.16 75 3.4X104 4.2X105 359 76 4.1
AIGCBussmann是一家全球知名的电器制造商，专注于高压和低压配电网领域的解决方案。高压电机保护熔断器是Bussmann产品线中的一种关键元件，主要用于电力系统中高压电动机（如同步发电机、异步电动机等）的过载和短路保护。这种熔断器通过在其内部设置高熔点合金制成的熔体，能够在电流超过预设值时迅速熔断，从而切断电路，防止电机因过热或电弧损害而遭受损坏。
高压电机保护熔断器具备良好的灭弧性能和稳定性，能够适应各种高压工作环境和不同电机功率等级的需求。其选择通常会依据电机的额定电压、额定电流、短路电流水平以及系统的安全要求等因素进行。Bussmann凭借其在电气连接和保护技术方面的专业知识与经验，为用户提供高效、可靠的高压电机保护解决方案。
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