变压器在通电瞬间会产生一个很大的电流尖峰叫浪涌电流,这种输入浪涌电流的出现原因是:当变压器电源在正弦输入电压的过零点起动时,变压器磁芯的磁化在前几个周期中被迫进入一种不平衡状态。结果,磁芯在每个半周饱和。而在此时,产生的励磁电流仅由较小的漏电感寄生电阻来抑制,这会产生很大的输入浪涌电流。
浪涌电压/电流产生的原因
1、变压器空载合闸瞬间会产生特别大的电流,叫励磁浪涌,检测励磁浪涌有两种方式:
峰值励磁浪涌(Peak Inrush Current)和均方有效值浪涌(RMS Inrush Current)
a)、峰值励磁浪涌(Peak Inrush Current): 指变压器在合闸瞬间产生的最大峰值电流;
b)、均方有效值浪涌(Rms Inrush Current):指变压器在合闸过程中一个或几个(FLUK435测试仪标定为第一个浪涌波形25ms)的均方有效值;
2、一般变压器励磁浪涌衰减很快,第五个波形就达到稳态,这样,峰值励磁浪涌和均方有效值浪涌差别很大,对供电系统设备的影响也不同,不同的供电网络设备考虑浪涌模式是不同的:
a)、峰值励磁浪涌(Peak Inrush Current): 主要考虑供电网络电压畸变的考量依据
b)、均方有效值浪涌(Rms Inrush Current):是变压器上游开关跳闸和上游熔丝和继电器选择的主要考量依据
3、合闸浪涌的测试
合闸浪涌测试最真实数据是在使用现场合闸,利用FLUK435捕捉浪涌(Peak或Rms)信号,有些变压器厂家提供的出厂合闸浪涌测试数据,和使用现场的测试数据差别非常大,造成用户合闸使用时,上游开关跳闸,系统电压畸变超标,这是因为设计变压器时没有考虑到实际现场的供电参数,而且没有考虑峰值励磁浪涌(Peak Inrush Current)的数据,以及均方有效值浪涌(Rms Inrush Current)和峰值励磁浪涌(Peak Inrush Current)两组数据之间的最佳比例。
4、有些变压器生产厂家通过加装抑制或旁路励磁浪涌的回路方法来达到上游开关不至于因太高的合闸浪涌造成跳闸。但旁路励磁浪涌方法其合闸浪涌始终在系统存在,甚至造成上游第二级开关跳闸和系统电压畸变超标;抑制浪涌办法会造成系统电压骤升问题,另外增加的元器件造成系统操作复杂化,系统可靠性降低,国外已经不允许采用这两种方法。
5、峰值励磁浪涌(Peak Inrush Current)和均方励磁浪涌有效值(RMS Inrush Current)的转换
根据UL、IEC的研究以及国外ABB、MGE、APC、ETON、SOCOMEC、DCD等的研究结果,机房变压器的浪涌峰值电流在1.9-2.2倍的25ms均方浪涌有效值范围内为最佳。
由于电压突变引起的当变压器合闸时正是电源正弦波的波形进入零的位置时,变压器会产生很大的冲击电流,甚至会造成变压器保护动作跳闸。不过这种概率很低,所以平时变压器合闸时,其冲击电流都很小 变压器在空载合闸时会出现激磁涌流。其大小可达稳态激磁电流的80-100倍,或额定电流的6-8倍。涌流对变压器本身不会造成大的危害,但在某些情况下能造成电波动,如不采取相应措施,可能使变压器过电流或差动继电保护误动作。 变压器励磁涌流是变压器全电压充电时在其绕组中产生的暂态电流. 变压器投入前铁芯中的剩余磁通与变压器投入时工作电压产生的磁通方向相同时,其总磁通远远超过铁芯的饱和磁通量,因此产生较大的涌流,其中最大峰值可达到变压器额定电流的6-8倍.励磁涌流与变压器投入时系统电压的相角,变压器铁芯的剩余磁通和电源系统阻抗等因素有关.最大涌流出现在变压器投入时电压经过零点的瞬间(该时磁通为峰值).变压器涌流中含有直流分量和高次谐波分量,随时间衰减,其衰减时间取决于回路电阻和电抗,一般大容量变压器约5-10S,小容量变压器约为0.2S左右一般在工厂生产检验时在电源输入处串接设定电流的保护开关(如常用的 DZ47-63 C20)开机时不发生跳闸就说明激磁涌流小于该保护开关的额定电流当然要多开关几次测试实际的激磁涌流可以用用示波器,在输入电源串接一小无感电阻,用示波器监测开机瞬时的涌浪电流的峰值但变压器浪涌电流最大是在开机时刚好在电源正弦波的波形进入零的位置时。人工开机时间是随机的在最大值的机率很小要用专用罗氏线圈来测量,目前全球做的最好的是pearson这一家的,很贵,动辄几万,一般的不具备。
问题陈述与提出:
变压器引起浪涌电流,浪涌电流超过了影响变压器铁芯磁性的饱和电流。甚至变压器的二次启动时无负载时也会发生。浪涌电流的大小取决于在变压器打开时的瞬时AC 波。如果这个瞬间正好是AC 电压波正在经历它的峰值,那么将没有浪涌电流产生。如果这样的话,浪涌电流的量将保持正常无负载值。如果这个瞬间正好是AC 电压波经历它的零值时,那么引起的电流将非常高而超过饱和电流(见图一)。这种情况下,变压器就必须受到保护不受浪涌电流的损坏。
华巨电子变压器浪涌电流抑制保护方案:
此应用提供了一个方便的解决方案(图2)来处理变压器中浪涌电流超过饱和电流的问题。这个方案是用 NTC 热敏电阻与初级线圈串联。在开关打开时热敏电阻有个高阻值来抑制浪涌电流。短时间之后,NTC热敏电阻由于自热,阻值降低到一个很低的值而不影响正常工作。
华巨电子提供的大功率NTC热敏电阻能够满足这一要求,其最大电流可以达到32A的稳态电流,在220V中功率可达7KW的的变压器提供浪涌保护功能。
具体参数参阅华巨电子SCD系列大功率热敏电阻:http://www.sinochip.net/ntcremin/scd.htm
每个额定变压器:1000VA,
每个变压器下降:30V
总额定变压器:2000VA
使用的滤波电容:30V,2300uF
使用的滤波电容:30V,2300uF
变压器保护指南-典型的浪涌电流限制器选择变压器
|
变压器
|
单相输入电压
|
连续电流
|
浪涌电流
|
阻抗X
|
电感XL
|
F
|
能源
|
最小R
|
建议使用型号
|
千伏安
|
VAC
|
A
|
A
|
( Ω)
|
(μH)
|
( Hz)
|
(J)
|
(Ω)
|
0.5
|
120
|
4.16
|
104
|
1.63
|
4328
|
60
|
23.4
|
4.9
|
SCD-10R06
|
1
|
240
|
4.16
|
104
|
3.26
|
8642
|
60
|
46.7
|
9.78
|
SCD-10R08
|
2
|
240
|
8.33
|
208
|
1.63
|
4328
|
60
|
93.62
|
4.89
|
SCD-10R15
|
3
|
240
|
12.5
|
312
|
1.09
|
2881
|
60
|
140.6
|
3.26
|
SCD-4R720
|
5
|
480
|
10.42
|
260
|
2.6
|
6913
|
60
|
234
|
7.83
|
SCD-10R15-480
|
10
|
480
|
20.83
|
512
|
1.3
|
3457
|
60
|
469
|
3.92
|
2个SCD-2R025-480Vac串联或1个SCD-5R025-680ac
|
型号
|
R
|
SSI
|
焦耳
|
电压
|
Max
|
Max
|
Max
|
SCD-10R06
|
10
|
6
|
40
|
240
|
SCD-10R08
|
10
|
8
|
90
|
240
|
SCD-10R15
|
10
|
15
|
150
|
240
|
SCD-4R720
|
4.7
|
20
|
300
|
240
|
SCD-10R15-480Vac
|
10
|
15
|
250
|
480
|
SCD-2R025-480Vac
|
2
|
25
|
300
|
480
|
SCD-5R025-680Vac
|
5
|
25
|
600
|
680
|
华巨电子与AMETHERM互换对照表
Sinochip(华巨)
|
AMETHERM
|
R
|
SSI
|
Joules
|
Part
|
Part
|
Max
|
Max
|
SCD-0R230-30
|
SL32 0R230
|
0.2
|
30
|
100
|
SCD-0R516-22
|
SL22 0R516
|
0.5
|
16
|
160
|
SCD-0R530-30
|
SL32 0R530
|
0.5
|
30
|
150
|
SCD-0R536-30K
|
AS32 0R536-100
|
0.5
|
36
|
300
|
SCD-0R530-30K
|
AS32 0R530-100
|
0.5
|
30
|
300
|
SCD-0R536-30
|
SL32 0R536
|
0.5
|
36
|
150
|
SCD-0R536-30K1
|
MS32 0R536
|
0.5
|
36
|
250
|
SCD-0R540-30K1
|
MS32 0R540
|
0.5
|
40
|
250
|
SCD-0R550-35K1
|
MS35 0R550
|
0.5
|
50
|
900
|
SCD-0R550-35K
|
AS35 0R550
|
0.5
|
50
|
800
|
SCD-0R712-22
|
SL22 0R712
|
0.7
|
12
|
120
|
SCD-1R010-15
|
SL15 1R010
|
1.0
|
10
|
45
|
SCD-1R010-13
|
SL12 1R010
|
1.0
|
10
|
28
|
SCD-1R020-20
|
SL22 1R020
|
1.0
|
20
|
65
|
SCD-1R025-25
|
/
|
1.0
|
25
|
120
|
SCD-1R030-30
|
SL32 1R030
|
1.0
|
30
|
160
|
SCD-1R030-30K
|
AS32 1R030
|
1.0
|
30
|
300
|
SCD-1R030-30K
|
AS32 1R030-100
|
1.0
|
30
|
300
|
SCD-1R036-30
|
SL32 1R036
|
1.0
|
36
|
160
|
SCD-1R036-30K1
|
MS32 1R036
|
1.0
|
36
|
300
|
SCD-1R036-30K
|
AS32 1R036-100
|
1.0
|
36
|
300
|
SCD-1R040-35K1
|
MS35 1R040
|
1.0
|
40
|
800
|
SCD-1R040-35K
|
AS35 1R040
|
1.0
|
40
|
800
|
SCD-1R308-13
|
SL12 1R308
|
1.3
|
8
|
40
|
SCD-2R05-8
|
SL10 2R005
|
2.0
|
5
|
30
|
SCD-2R018-25
|
SL22 2R018
|
2.0
|
18
|
90
|
SCD-2R023-30
|
SL32 2R023
|
2.0
|
23
|
250
|
SCD-2R025-30K
|
SL32 2R025
|
2.0
|
25
|
300
|
SCD-2R025-30K1
|
MS32 2R025
|
2.0
|
25
|
300
|
SCD-2R025-30K
|
AS32 2R025
|
2.0
|
25
|
300
|
SCD-2R035-35K1
|
MS35 2R035
|
2.0
|
35
|
750
|
SCD-2R035-35K
|
AS35 2R035
|
2.0
|
35
|
700
|
SCD-2R53-8
|
SL08 2R503
|
2.5
|
3
|
10
|
SCD-2R55-10
|
SL10 2R505
|
2.5
|
5
|
30
|
SCD-2R55-12
|
SL12 2R505
|
2.5
|
5
|
36
|
SCD-2R56-15
|
SL15 2R506
|
2.5
|
6
|
40
|
SCD-2R58-13
|
SL15 2R507
|
2.5
|
7
|
40
|
SCD-2R58-20
|
SL22 2R508
|
2.5
|
8
|
90
|
SCD-2R58-20
|
SL18 2R508
|
2.5
|
8
|
90
|
SCD-2R58-13
|
SL15 2R508
|
2.5
|
8
|
40
|
SCD-2R59-15
|
SL15 2R509
|
2.5
|
9
|
40
|
SCD-2R512-20
|
SL22 2R510
|
2.5
|
10
|
90
|
SCD-2R515-20
|
SL22 2R515
|
2.5
|
15
|
90
|
SCD-3R030-35K1
|
MS35 3R030
|
3.0
|
30
|
750
|
SCD-3R030-35K
|
AS35 3R030
|
3.0
|
30
|
600
|
SCD-4R03-05
|
SL05 4R003
|
4.0
|
3
|
5
|
SCD-4R03-08
|
SL08 4R003
|
4.0
|
3
|
10
|
SCD-4R04-10
|
SL10 4R004
|
4.0
|
4
|
20
|
SCD-4R08-15
|
SL15 4R008
|
4.0
|
8
|
40
|
SCD-4R014-20
|
SL22 4R014
|
4.0
|
14
|
100
|
SCD-4R023-30
|
SL32 4R023
|
4.0
|
23
|
200
|
SCD-5R01-05
|
SL05 5R001
|
5.0
|
1
|
5
|
SCD-5R08-08
|
SL08 5R002
|
5.0
|
2
|
10
|
SCD-5R03-10
|
SL10 5R003
|
5.0
|
3
|
20
|
SCD-5R03-08
|
SL08 5R003
|
5.0
|
3
|
10
|
SCD-5R04-13
|
SL12 5R004
|
5.0
|
4
|
40
|
SCD-5R06-20
|
SL22 5R006
|
5.0
|
6
|
50
|
SCD-5R06-20
|
SL18 5R006
|
5.0
|
6
|
75
|
SCD-5R06-15
|
SL15 5R006
|
5.0
|
6
|
50
|
SCD-5R012-20
|
SL22 5R012
|
5.0
|
12
|
100
|
SCD-5R020-30
|
SL32 5R020
|
5.0
|
20
|
200
|
SCD-5R020-30K1
|
MS32 5R020
|
5.0
|
20
|
300
|
SCD-5R020-30K
|
AS32 5R020
|
5.0
|
20
|
300
|
SCD-5R025-35K
|
AS35 5R025
|
5.0
|
25
|
600
|
SCD-5R025-35K1
|
MS35 5R025
|
5.0
|
25
|
600
|
SCD-7R02-09
|
SL08 7R002
|
7.0
|
2
|
8
|
SCD-7R05-15
|
SL15 7R005
|
7.0
|
5
|
60
|
SCD-7R05-15
|
SL15 7R005
|
7.0
|
5
|
60
|
SCD-7R07-15
|
SL15 7R007
|
7.0
|
7
|
50
|
SCD-7R010-20
|
SL22 7R010
|
7.0
|
10
|
100
|
SCD-7R015-30K
|
MS32 7R015
|
7.0
|
15
|
250
|
SCD-8R03-13
|
SL12 8R003
|
8.0
|
3
|
25
|
/
|
SL03 10001
|
10.0
|
1
|
2
|
SCD-10R02-11
|
SL10 10002
|
10.0
|
2
|
10
|
SCD-10R02-9
|
SL08 10002
|
10.0
|
2
|
10
|
SCD-10R03-11
|
SL10 10003
|
10.0
|
3
|
17
|
SCD-10R04-13
|
SL12 10004
|
10.0
|
4
|
40
|
SCD-10R04-11
|
SL10 10004
|
10.0
|
4
|
17
|
SCD-10R05-20
|
SL22 10005
|
10.0
|
5
|
90
|
SCD-10R05-20
|
SL18 10005
|
10.0
|
5
|
75
|
SCD-10R05-13
|
SL12 10005
|
10.0
|
5
|
60
|
SCD-10R06-13
|
SL12 10006
|
10.0
|
6
|
40
|
SCD-10R06-15
|
SL15 10006
|
10.0
|
6
|
55
|
SCD-10R06-13
|
SL12 10006-03
|
10.0
|
6
|
40
|
SCD-10R07-20
|
SL22 10007
|
10.0
|
7
|
90
|
SCD-10R08-20
|
SL22 10008
|
10.0
|
8
|
90
|
SCD-10R08-20K1
|
MS22 10008
|
10.0
|
8
|
200
|
SCD-10R09-25
|
SL22 10009
|
10.0
|
9
|
100
|
SCD-10R10-25
|
/
|
10.0
|
10
|
105
|
SCD-10R15-30
|
SL32 10015
|
10.0
|
15
|
150
|
SCD-10R15-30K1
|
MS32 10015
|
10.0
|
15
|
250
|
SCD-10R15-30K
|
AS32 10015
|
10.0
|
15
|
250
|
SCD-10R18-35K1
|
MS35 10018
|
10.0
|
18
|
500
|
SCD-10R18-35K
|
AS35 10018
|
10.0
|
18
|
500
|
SCD-14R05-20
|
SL22 14005
|
14.0
|
5
|
75
|
SCD-14R07-20
|
SL22 14007
|
14.0
|
7
|
75
|
SCD-15R04-15
|
SL12 15004
|
15.0
|
4
|
40
|
SCD-15R12-30K
|
MS32 15012
|
15.0
|
12
|
250
|
SCD-16R04-20
|
SL22 16004
|
16.0
|
4
|
100
|
SCD-16R04-15
|
SL15 16004
|
16.0
|
4
|
50
|
SCD-16R05-20
|
SL22 16005
|
16.0
|
5
|
1
|
SCD-17R04-13
|
SL12 17004
|
17.0
|
17
|
30
|
SCD-20R02-09
|
SL08 20002
|
20.0
|
2
|
8
|
SCD-20R03-13
|
SL12 20003
|
20.0
|
3
|
35
|
SCD-20R05-20
|
SL22 20005
|
20.0
|
5
|
125
|
SCD-20R05-20K1
|
MS22 20005
|
20.0
|
5
|
180
|
SCD-20R07-20K
|
SL22 20007
|
20.0
|
7
|
125
|
SCD-20R08-30K1
|
MS32 20008
|
20.0
|
8
|
250
|
SCD-20R09-30
|
/
|
20.0
|
9
|
250
|
SCD-20R10-30K1
|
MS32 20010
|
20.0
|
10
|
250
|
SCD-20R10-35K1
|
MS35 20010
|
20.0
|
10
|
500
|
SCD-20R10-30K
|
AS32 20010
|
20.0
|
10
|
250
|
SCD-20R10-35K
|
AS35 20010
|
25.0
|
10
|
500
|
SCD-25R02-13
|
SL12 25002
|
25.0
|
2
|
30
|
SCD-25R02-11
|
SL10 25002
|
25.0
|
2
|
20
|
SCD-25R03-15
|
SL15 25003
|
25.0
|
3
|
50
|
SCD-25R03-13
|
SL12 25003
|
25.0
|
3
|
45
|
SCD-25R04-15
|
SL15 25004
|
25.0
|
4
|
50
|
/
|
SL05 30001
|
30.0
|
1
|
3
|
SCD-30R04-15
|
SL15 30004
|
30.0
|
4
|
40
|
SCD-30R04-15K1
|
MS15 30004
|
30.0
|
4
|
135
|
SCD-30R05-20
|
SL22 30005
|
30.0
|
5
|
80
|
SCD-30R05-20K1
|
MS22 30005
|
30.0
|
5
|
150
|
SCD-30R06-20
|
SL18 30006
|
30.0
|
6
|
65
|
SCD-33R01-09
|
SL08 33001
|
33.0
|
1
|
8
|
SCD-40R02-13
|
SL12 40002
|
40.0
|
2
|
20
|
SCD-40R03-11
|
SL10 40002
|
40.0
|
2
|
15
|
SCD-40R04-15
|
SL15 40004
|
40.0
|
4
|
35
|
SCD-40R04-15K1
|
MS15 40004
|
40.0
|
4
|
135
|
SCD-40R05-20
|
SL22 40005
|
40.0
|
5
|
63
|
SCD-47R03-15
|
SL15 47003
|
47.0
|
3
|
50
|
SCD-47R03-20
|
SL18 47003
|
47.0
|
3
|
75
|
SCD-50R01-09
|
SL08 50001
|
50.0
|
1
|
12
|
SCD-50R01-11
|
SL10 50001
|
50.0
|
1
|
18
|
SCD-50R02-11
|
SL10 50002
|
50.0
|
2
|
18
|
SCD-50R02-13
|
SL12 50002
|
50.0
|
2
|
20
|
SCD-50R04-20
|
SL22 50004
|
50.0
|
4
|
80
|
SCD-50R04-20K1
|
MS22 50004
|
50.0
|
4
|
240
|
SCD-50R06-30K1
|
MS32 50006-L
|
50.0
|
6
|
250
|
SCD-50R06-30K1
|
AS32 50006
|
50.0
|
6
|
250
|
SCD-50R06-30K1
|
MS32 50006
|
50.0
|
6
|
250
|
SCD-60R02-15
|
SL15 60002
|
60.0
|
2
|
50
|
SCD-60R03-22
|
SL22 60003
|
60.0
|
3
|
72
|
SCD-60R04-15
|
SL15 60004
|
60.0
|
4
|
50
|
SCD-75R04-20K1
|
MS22 75004
|
75.0
|
4
|
240
|
SCD-80R02-13
|
SL12 80002
|
80.0
|
2
|
30
|
SCD-80R02-15
|
SL15 80002
|
80.0
|
2
|
45
|
SCD-121R01-09
|
SL08 12101
|
120.0
|
1
|
10
|
/
|
SL05 12101
|
120.0
|
1
|
12
|
SCD-121R01-11
|
SL10 12101
|
120.0
|
1
|
14
|
SCD-121R01-13
|
SL12 12101
|
120.0
|
1
|
25
|
SCD-121R02-20
|
SL22 12102
|
120.0
|
2
|
80
|
SCD-121R02-20K1
|
MS22 12102
|
120.0
|
2
|
220
|
SCD-121R02-15
|
SL15 12102
|
120.0
|
2
|
40
|
SCD-121R02-13
|
SL12 12102
|
120.0
|
2
|
25
|
SCD-121R03-20
|
SL22 12103
|
120.0
|
2
|
80
|
SCD-121R03-20K1
|
MS22 12103
|
120.0
|
3
|
220
|
SCD-121R04-20K1
|
MS22 12104
|
120.0
|
4
|
220
|
SCD-151R02-13K1
|
MS12 15102
|
150.0
|
2
|
110
|
SCD-151R02-13
|
SL12 15102
|
150.0
|
2
|
10
|
/
|
SL03 22101
|
220.0
|
1
|
2
|
SCD-221R01-13
|
SL12 22101
|
220.0
|
1
|
30
|
SCD-221R02-20
|
SL22 22102
|
220.0
|
2
|
72
|
SCD-221R02-15
|
SL15 22102
|
220.0
|
2
|
40
|
SCD-221R3.5-20K1
|
MS22 22103
|
220.0
|
3.5
|
75
|
华巨电子与RTI互换对照表
RTI
|
Sinochip Part
|
R@25℃
|
D Max
|
Imax
|
RImax
|
Part Number
|
华巨型号
|
(Ohms)
|
(mm)
|
(AMPS)
|
(Ohms)
|
SG260
|
SCD-0R530-30
|
0.5
|
20
|
30
|
0.01
|
SG326
|
SCD-0R530-30
|
0.5
|
20
|
30
|
0.01
|
SG100
|
SCD-1R020-20
|
1
|
15
|
20
|
0.015
|
SG301
|
SCD-1R020-20
|
1
|
15
|
20
|
0.015
|
SG405
|
SCD-1R030-30
|
1
|
25
|
30
|
0.015
|
SG328
|
SCD-1R030-30
|
1
|
25
|
30
|
0.015
|
SG416
|
SCD-1R38-13
|
1.3
|
25
|
8
|
0.05
|
SG110
|
SCD-2R018-20
|
2
|
15
|
18
|
0.03
|
SG302
|
SCD-2R018-20
|
2
|
15
|
18
|
0.03
|
SG420
|
SCD-2R023-30
|
2
|
25
|
23
|
0.025
|
SG355
|
SCD-2R023-30
|
2
|
25
|
23
|
0.025
|
SG120
|
SCD-2R53
|
2.5
|
15
|
3
|
0.15
|
SG303
|
SCD-2R53
|
2.5
|
15
|
3
|
0.15
|
SG130
|
SCD-2R57-13
|
2.5
|
15
|
7
|
0.05
|
SG304
|
SCD-2R57-13
|
2.5
|
15
|
7
|
0.05
|
SG140
|
SCD-2R59-15
|
2.5
|
15
|
9
|
0.04
|
SG305
|
SCD-2R59-15
|
2.5
|
15
|
9
|
0.04
|
SG150
|
SCD-2R510-20
|
2.5
|
15
|
10
|
0.04
|
SG306
|
SCD-2R510-20
|
2.5
|
15
|
10
|
0.04
|
SG160
|
SCD-2R515-20
|
2.5
|
15
|
15
|
0.03
|
SG307
|
SCD-2R515-20
|
2.5
|
15
|
15
|
0.03
|
SG170
|
SCD-4R08-15
|
4
|
15
|
8
|
0.07
|
SG308
|
SCD-4R08-15
|
4
|
15
|
8
|
0.07
|
SG32
|
SCD-4R14-20
|
4
|
20
|
14
|
0.05
|
SG330
|
SCD-4R14-20
|
4
|
20
|
14
|
0.05
|
SG190
|
SCD-5R04-11
|
5
|
15
|
4
|
0.15
|
SG310
|
SCD-5r04-11
|
5
|
15
|
4
|
0.15
|
SG200
|
SCD-5R07-13
|
5
|
15
|
7
|
0.07
|
SG311
|
SCD-5R07-13
|
5
|
15
|
7
|
0.07
|
SG44
|
SCD-5R08-15
|
5
|
20
|
8
|
0.05
|
SG332
|
SCD-5R08-15
|
5
|
20
|
8
|
0.05
|
SG26
|
SCD-5R12-20
|
5
|
15
|
12
|
0.06
|
SG333
|
SCD-5R12-20
|
5
|
15
|
12
|
0.06
|
SG210
|
SCD-7R04-13
|
7
|
15
|
4
|
0.2
|
SG312
|
SCD-7R04-13
|
7
|
15
|
4
|
0.2
|
SG64
|
SCD-7R10-20
|
7
|
15
|
10
|
0.08
|
SG336
|
SCD-7R10-20
|
7
|
15
|
10
|
0.08
|
SG337
|
SCD-10R02-7
|
10
|
15
|
2
|
0.3
|
SG220
|
SCD-10R03-9
|
10
|
15
|
3
|
0.2
|
SG313
|
SCD-10R03-9
|
10
|
15
|
3
|
0.2
|
SG42
|
SCD-10R05-11
|
10
|
15
|
5
|
0.2
|
SG338
|
SCD-10R05-11
|
10
|
15
|
5
|
0.2
|
SG27
|
SCD-10R06-13
|
10
|
15
|
6
|
0.15
|
SG314
|
SCD-10R06-13
|
10
|
15
|
6
|
0.15
|
SG40
|
SCD-10R08-20
|
10
|
20
|
8
|
0.1
|
SG320
|
SCD-16R04-13
|
16
|
25
|
4
|
0.25
|
SG230
|
SCD-20R1.75-11
|
20
|
15
|
1.75
|
0.6
|
SG315
|
SCD-20R1.75-11
|
20
|
15
|
1.75
|
0.6
|
SG240
|
SCD-40R02-13
|
40
|
15
|
2
|
0.6
|
SG316
|
SCD-40R02-13
|
40
|
15
|
2
|
0.6
|
SG250
|
SCD-121R03-15
|
120
|
15
|
3
|
0.9
|
SG317
|
SCD-121R03-15
|
120
|
15
|
3
|
0.9
|
华巨电子与EPCOS互换对照表
EPCOS Part
|
Sinochip Part
|
R@25℃
|
Imax
|
RImax
|
D Max
|
华巨型号
|
(Ohms)
|
(AMPS)
|
(Ohms)
|
(mm)
|
B57464S0109M000
|
SCD-1R20-25
|
1
|
20
|
0.018
|
25
|
B57464S0209M000
|
SCD-2R18-25
|
2
|
18
|
0.026
|
25
|
B57464S0509M000
|
SCD-5R14-25
|
5
|
14
|
0.047
|
25
|
B57464S0100M000
|
SCD-10R10-25
|
10
|
10
|
0.084
|
25
|
B57364S0109M000
|
SCD-1R016-20
|
1
|
16
|
0.027
|
20
|
B57364S0209M000
|
SCD-2R014-20
|
2.0
|
14
|
0.035
|
20
|
B57364S0259M000
|
SCD-2R515-20
|
2.5
|
15
|
0.046
|
20
|
B57364S0409M000
|
SCD-4R12-20
|
4.0
|
12
|
0.043
|
20
|
B57364S0509M000
|
SCD-5R12-20
|
5
|
12
|
0.047
|
20
|
B57364S0100M000
|
SCD-10R8-20
|
10
|
8
|
0.085
|
20
|
B57238S0259M000
|
SCD-2R59.5-15
|
2.5
|
9.5
|
0.044
|
15
|
B57238S0309M000
|
SCD-3R9-16-15
|
3.0
|
9.0
|
0.046
|
15
|
B57238S0479M000
|
SCD-4R79-15
|
4.7
|
9.0
|
0.055
|
15
|
B57238S0509M000
|
SCD-5R9-15
|
5.0
|
9.0
|
0.058
|
15
|
B57238S0709M000
|
SCD-7R7-15
|
7.0
|
7.0
|
0.078
|
15
|
B57238S0809M000
|
SCD-8R7-15
|
8.0
|
7.0
|
0.084
|
15
|
B57238S0100M000
|
SCD-10R7-15
|
10.0
|
7.0
|
0.098
|
15
|
B57238S0150M000
|
SCD-15R6-15
|
15.0
|
6.0
|
0.125
|
15
|
B57238S0160M000
|
SCD-16R6-15
|
16.0
|
6.0
|
0.129
|
15
|
B57238S0200M000
|
SCD-20R6-15
|
20.0
|
6.0
|
0.136
|
15
|
B57238S0250M000
|
SCD-25R5-15
|
25.0
|
5.0
|
0.185
|
15
|
B57237S0109M000
|
SCD-1R09-13
|
1
|
9
|
0.032
|
13
|
B57237S0229M000
|
SCD-2R28-13
|
2.2
|
8
|
0.038
|
13
|
B57237S0259M000
|
SCD-2R58-13
|
2.5
|
8
|
0.048
|
13
|
B57237S0479M000
|
SCD-4R77-13
|
4.7
|
7
|
0.064
|
13
|
B57237S0509M000
|
SCD-5R7-13
|
5
|
7
|
0.068
|
13
|
B57237S0709M000
|
SCD-7R6-13
|
7
|
6
|
0.098
|
13
|
B57237S0100M000
|
SCD-10R6-13
|
10
|
6
|
0.126
|
13
|
B57237S0150M000
|
SCD-15R4-13
|
15
|
4
|
0.155
|
13
|
B57237S0220M000
|
SCD-22R3.5-13
|
22
|
3.5
|
0.192
|
13
|
B57237S0330M000
|
SCD-33R3-13
|
33
|
3
|
0.237
|
13
|
B57237S0600M000
|
SCD-60R2.5-13
|
60
|
2.5
|
0.420
|
13
|
华巨电子热敏电阻厂家:www.sinochip.net