DRO Fuse Switch Disconnector
Applications
- DRO-160 fuse disconnecting switch are mainly used in circuits with high short-circuit current and motor circuit as power switch, disconnecting switch or emergency switch.
- Rated insulate voltage up to 50Hz AC, 690V; Rated working voltage up to 660V; Rated working current up to 160A; Rated short-time withstand current (valid): 3.2KA/1S. The fuse disconnecting switch complies with GB14048.3 and IEC947-3.
Design Features
The switch with three-phase and half sealed structures is made up of two parts: the seat and the cover (melt-loading device).The front operation can observe the rated data of the fuse links and indicator status. The switch can be matched with NH000 andNH00 fuse. The switch has features of small volume, reliable operation, convenient fuse install and removal and small-required manual operation power.
Model Meaning:
Table 4 Basic data of switch
| Models |
Rated insulation voltage (V) |
Rated working voltage (V) |
Conventional free air thermal current (A) |
Fuse link |
Weight (g) |
Dimension (mm) |
| DRO-160 |
690 |
380, 500, 660 |
160 |
NH00, NH000 |
1350 |
Figure 1 |
Table 2 The working current of the switch at different voltages and different applications
| Models |
Rated working voltage (V) |
Rated working current (A) / Application |
Fuse link |
The rated breaking capacity of the fuse links (KA) |
| DRO-160 |
380 |
160A/AC22, 160A/AC23 |
NH00, NH000 |
100 |
| 500 |
160A/AC22, 80A/AC23 |
100 |
| 660 |
160A/AC21, 80A/AC23 |
50 |
Table3 Rated open and breaking capacity of the switch
| Rated working voltage (V) |
Rated working current (A) |
Application |
The rated breaking capacity of the fuse links (KA) |
| Connecting |
Breaking |
| I/Ie |
U/Ue |
COSΦ |
Ic/Ie |
Ur/Ue |
COSΦ |
| 380 |
160 |
AC21 |
1.5 |
1.05 |
0.95 |
1.5 |
1.05 |
0.95 |
| 160 |
AC22 |
3 |
1.05 |
0.65 |
3 |
1.05 |
0.65 |
| 100 |
AC23 |
10 |
1.05 |
0.45 |
8 |
1.05 |
0.45 |
| 500 |
160 |
AC21 |
1.5 |
1.05 |
0.95 |
1.5 |
1.05 |
0.95 |
| 100 |
AC22 |
3 |
1.05 |
0.65 |
3 |
1.05 |
0.65 |
| 50 |
AC23 |
10 |
1.05 |
0.45 |
8 |
1.05 |
0.45 |
| 660 |
100 |
AC21 |
1.5 |
1.05 |
0.95 |
1.5 |
1.05 |
0.95 |
| 80 |
AC22 |
3 |
1.05 |
0.65 |
3 |
1.05 |
0.65 |
| 36 |
AC23 |
10 |
1.05 |
0.45 |
8 |
1.05 |
0.45 |
Note:
- I for connecting current
- U post connecting voltage
- Ie rated working current
- Ue rated working voltage
- Ic breaking current
- Ur recovery current
