Environment:
Applicable to Multi-9 C60 circuit breakers (UL489 and UL1077)
The attached document provides the power loss (watts loss) and voltage drop per pole at the rated current (nominal current) of the circuit breaker. For example, at a rated current of 1A, the expected power loss per pole for a 1A circuit breaker is 2.3 W. This information can be used to calculate the voltage drop when used at non-nominal currents.
UL 489A-UL 1077 / CSA C22.2 No. 235-04
UL 489 / CSA C22.2 No. 5-02
|
Rating (A) |
C60 (W/pole) |
C60 (mV/pole) |
|
0.5 |
2.2 |
4400 |
|
0.75 |
2.96 |
3950 |
|
1 |
2.3 |
2300 |
|
1.2 |
2.4 |
2000 |
|
1.5 |
2.1 |
1400 |
|
2 |
2.5 |
1276 |
|
3 |
2.2 |
745 |
|
4 |
2.4 |
600 |
|
5 |
2.5 |
500 |
|
6 |
2.7 |
480 |
|
7 |
2.8 |
400 |
|
8 |
2.69 |
374 |
|
10 |
1.9 |
196 |
|
13 |
2.9 |
247 |
|
15 |
2.25 |
150 |
|
16 |
2.59 |
162 |
|
20 |
2.94 |
147 |
|
25 |
3.05 |
122 |
|
30 |
3.12 |
104 |
|
32 |
3.55 |
111 |
|
35 |
3.15 |
90 |
|
40 |
4.6 |
115 |
|
50 |
4.3 |
86 |
|
60 |
5.4 |
90 |
|
63 |
6.04 |
96 |
What do the B, C, D, K, and Z curve names on Multi 9 circuit breakers mean?
For C60 Multi-9 devices, the following are the meanings of the tripping curves (referencing the instantaneous tripping ratings):B Curve: 3.2 – 4.8 times the rated value for UL489 and UL1077 (3 – 5 times IEC)C Curve: 7 – 10 times the rated currentD Curve: 10 – 14 times the rated currentK Curve: 10 – 14 times the rated currentZ Curve: 2.4 – 3.6 times the rated current