Hiwin D2 - Page 67

D2 Drive User Guide v1.8 4. Wiring
HIWIN Mikrosystem Corp. 61
Selection of no-fuse breakers (NFBs):
When NFB is used in the drive shunt, its rated capacity is usually 1.5 - 2.5 times the rated
motor current in principle. The selection method is described as follows:
One drive: I
B
= C×I
n
.
Two or more drives not started at the same time: I
B
= (ΣI
n
- I
nMAX
)×K ＋ C
MAX
×I
nMAX
.
Two or more drives started at the same time: I
B
= C
1
×I
n1
＋ C
2
×I
n2
＋……＋ C
N
×I
nN
.
Note:
I
B
: Rated NFB current;
I
n
: Rated drive current;
I
nMAX
: The maximum rated current among different drives;
C: Multiple of rated current, usually 1.5 - 2.5, or 1.5 if it cannot be determined;
C
max
: Multiple of rated current for the maximum rated current among drives;
K: Demand rate; 1 if it cannot be determined.
Example:
If five D2-0123--A and one D2-0423--B drives are used,
(assuming that C and C
MAX
are 2)
Not started at the same time: I
B
= (1.5×5 + 4.1 - 4.1)×1 + 4.1×2 = 15.7 A
rms
.
Started at the same time: I
B
= 2×1.5 + 2×1.5 + 2×1.5 + 2×1.5 + 2×1.5 + 2×4.1 = 23.2 A
rms
.
Table 4-26 Rated current of D2-series drives
Drive model name
Rated input current
D2-0123--A
1.5 A
rms
D2-0423--B
4.1 A
rms
D2-1023--C
7.5 A
rms
D2T-2033--D
10.5 A
rms