文件编号:
NDT2920257
文件版本:
3
地址:上海市浦东新区申江南路
2000
号
邮编:
201315
电话:
(021)68586699
传真:
(021)23025796
第
8
页
共
17
页
(
%
)
NDM3EU-400
Ir
(
A
)
见表
3 See table 3
脱 扣 特 性
Tripping
Characteri
stics
Tr
(
s
)
12
60
100
150
≤1.05Ir
>
2h
不脱扣
Non-tripping
>
1.30Ir
<
1h
脱扣
tripping
1.5Ir,tr
(
s
)
21.3
106.7
177.8
266.7
2.0Ir,tr
(
s
)
12
60
100
150
7.2Ir,tr
(
s
)
0.93
4.63
7.72
11.57
精度
Accuracy
(
%
)
±10
注:动作曲线符合
tr=
(
2Ir
)
2
×
Tr/I
2
tr:
过载长延时动作时间
Tr
:过载长延时动作时间整定值
I
:实际运行电流
Ir
:过载长延时动作电流整定值
Note:Curve is satisfied tr=
(
2Ir
)
2
×
Tr/I
2
tr: Overload long-time delay time Tr: Overload long-time delay setting time
I
:
working current Ir: Overload long-time delay setting current
2)
过载长延时具有热记忆功能,在产品脱扣后的
30min(NDM3EU-225)/20min(NDM3EU-400)
内有效
(
NDM3EU-225
需要
DC24V
辅助电源)
当第一次脱扣的能量是
QT =
(
2 * Ir
)
2
* T
时,
T
是行程时间。
能量
Q1
在间隔
T1 = QT
×
T1 / Tthm
时损失,第二次脱扣所需的能量为
Q0
,即第二次脱扣时间为
t =
(
QT-Q1
)
/
(
2 * Ir
)
2
;
有关热记忆功能,
请联系制造商
The overload long delay has a thermal memory function, which can be activated 30minutes (NDM3EU-225)
/ 20 minutes (NDM3EU-400) after the tripping of the circuit breaker .(NDM3EU-225 requires DC24V auxiliary
power supply to realize this function).
When the energy of the first trip is QT = (2 * Ir)
2
* T, T is the trip time. The energy Q1 lost at interval T1 =
QT×T1/Tthm, the energy required for the second trip is Q0, that is, the second trip time is t = (QT - Q1) / (2* Ir)
2
;
For thermal memory function, please contact the manufacturer.
3
)短路短延时保护(见表
6
)
Short circuit short-time delay protection (Table 6)
短延时保护防止配电系统的阻抗性短路。分成两段:反时限段,定时限段。
Short circuit short-time delay protection is used to prevent short cirtuit of power distribution system,which is
divided into two parts: inverse time and fixed time
表
6 Table6
Isd
(×
Ir
)
见表
3 See table 3
脱扣特性
Tripping
Characteristics
反时限
Inverse time
Is
≤
I
<
1.5Is
Tsd
(
s
)
0.1
0.2
0.3
0.4
ts
(
s
)
ts=
(
1.5Isd
)
2
×
Tsd/I
2
定时限
Fixed time
ts=Tsd
(
s
)
0.1
0.2
0.3
0.4