Product Description
ProductOverview
The electronic moulded case circuit breaker (hereinafter referred to as circuit breaker) is suitable for AC 50/60Hz power grid with rated insulation voltage of 80V, rated current of 16A-800A and rated working voltage of 400V low voltage.The circuit breaker is equipped with intelligent tripping device, which not only increases the selection range of setting current, but also has three-section protection functions of overload long delay, short circuit short delay and short circuit instantaneous protection.
4. Performance and parameter
4.1 Rated current of circuit breaker
|
Rated current of frame size InmA |
Short circuit breaking capacity kA* (effective value) Icu/Ics |
Rated current of circuit breaker In (A) |
|
AC 400V |
||
|
125 |
50/35 |
32A (setting current range 16A-32A) 63A (setting current range 32A-63A) 125A (setting current range 63A-125A) |
|
250 |
50/35 |
250A (setting current range 100A-250A) |
|
400 |
65/50 |
400A (setting current range 200A-400A) |
|
800 |
65/50 |
630A (setting current range400A-630A) 800A (setting current range 630A-800A) |
*The power factor is determined by test current I, it’s 0.5 if I≤10KA, 0.3 if 10KA<I≤20KA, 0.25 if 20KA<I≤50KA, and 0.2 if I>50KA.
4.2Long-delay over-current protection operating characteristic of controller of circuit breaker
|
Current |
Operation time |
|||||||||
|
For power distribution |
1.05IrI |
No operation within 2 hours |
||||||||
|
1.3IrI |
Operation ≤1h |
|||||||||
|
2IrI |
Set time t1(s) |
Inm=125, 250A |
Inm=400A, 630A, 800A |
|||||||
|
12 |
60 |
80 |
100 |
12 |
60 |
100 |
150 |
|||
|
For motor protection |
1.05IrI |
No operation within 2 hours |
||||||||
|
1.2IrI |
Operation ≤1h |
|||||||||
|
1.5IrI |
Operation time t1(s) |
Inm=125, 250A |
Inm=400A, 630A, 800A |
|||||||
|
21.3 |
107 |
142 |
178 |
21.3 |
107 |
178 |
267 |
|||
|
2IrI |
Set time t1 (s) |
12 |
60 |
80 |
100 |
12 |
60 |
100 |
150 |
|
|
7.2IrI |
Operation time t1(s) |
0.93 |
4.63 |
6.17 |
7.72 |
0.93 |
4.63 |
7.72 |
11.6 |
|
|
Tripping level |
– |
10 |
10 |
20 |
– |
10 |
20 |
30 |
||
|
Note: 1. The operation time conforms to the I2T1=(2Ir1)2t2(1.2Ir1≤I<Ir2) 2. Operation time tolerance:±20% 3.The returnable time should be not less than 70% of operation time. |
||||||||||
4.3 Short-delay over-current protection operating characteristic of controller of circuit breaker
|
Current |
Operation time |
|||||||||
|
Rated current |
125A |
250A |
400A |
630A |
800A |
|||||
|
Ir2≤I<1.5Ir2 |
Inverse time |
I2T2=(1.5Ir2)2t2 |
||||||||
|
1.5Ir2≤I<Ir3 |
Definite time |
Set time t2 (s) |
0.06 |
0.1 |
0.2 |
0.3 |
||||
|
Tolerance |
±0.02 |
0.03 |
±0.04 |
±0.06 |
||||||
|
Returnable time (s) |
0.14 |
0.21 |
||||||||
|
Note: the tolerance for the inverse time operation time is ±20% |
||||||||||
Send Inquiry
If you have any enquiry about quotation or cooperation,please feel free to email us at jiang8152@gmail.com or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
Reviews
There are no reviews yet.