GJYMX
Compact insulated bus ducts (hereinafter referred to as bus ducts) support three-phase three-wire, three-phase four-wire, and three-phase five-wire AC systems with frequencies of 50-60Hz and voltages up to 400V. Their rated operating currents range from 400 to 6300A. They serve as modern power supply and distribution equipment primarily for industrial plants, enterprises, institutions, and high-rise buildings. Bus ducts with plug-in connectors can conveniently branch power circuits through plug-in junction boxes or plug-in switch boxes. They offer advantages such as compact size, tight structure, high current-carrying capacity, and easy maintenance.
Bus ducts can be installed directly from transformers to low-voltage distribution panels, or from low-voltage panels directly to distribution systems as feeder lines.
Main Technical Parameters of Bus Duct
Item
Rated Current (A)
250
315
400
500
630
800
1000
1250
1600
2000
2500
Execution Standard
IEC60439.1-1999, IEC60439.2-2000, GB7251.1-2005, GB7251.2-2006
Conductor Material
Cu+Ag ≥ 99.95%
Appearance
6063-T5 Aluminum Alloy
Unit Length
1.6m, 3m, 6m (customizable within 0.5–6m)
Protection Degree
IP54, IP65
Rated Insulation Voltage Ui
AC690/1000
Rated Operating Voltage Ue
AC380/660
Rated Frequency
50–60 Hz
Electrical Resistance (R20) (×10⁻³Ω/m)
65.3
64.5
60.1
58.6
53.5
49.7
43.7
38.3
28.8
25.4
20.6
Electrical Resistance (X20) (×10⁻³Ω/m)
27.4
25.1
24.7
23.6
19.4
16.4
13.1
15.9
13.8
11.3
11.1
Electrical Resistance (Z20) (×10⁻³Ω/m)
82.6
81.2
80.2
78.5
77.2
62.7
50.3
42.5
32.8
29.8
23.4
Voltage Drop (cosφ=0.98) (V/m)
0.049
0.062
0.061
0.059
0.058
0.056
0.054
0.051
0.049
0.048
0.049
Rated Short-Time Withstand Current (1s)
20kA
30kA
30kA
50kA
50kA
50kA
65kA
80kA
100kA
130kA
—
Rated Peak Withstand Current
40kA
63kA
63kA
100kA
100kA
100kA
130kA
160kA
200kA
250kA
—
Electric Clearance
≥10mm
Creepage Distance
≥12mm
Insulation Resistance
≥20MΩ
Grounding Resistance
≤0.01Ω
Dielectric Strength
50Hz, 3.75kV/1min no flashover, no breakdown
Temperature Rise
≤55K, ≤70K, ≤90K
Plug-in Box Quantity
Min. every 0.8m
Max Span
2m
Mechanical Bearing Capacity
6–43kg
Installation Method
Vertical / Horizontal
Conditions of Use
Indoor use;
Altitude ≤2000m;
Ambient temperature -5℃ to +40℃, 24h average ≤+35℃;
Relative humidity ≤50% at +40℃, may be higher at lower temp;
Example: 90% at +20℃;
Pollution degree: Class 2.
Centralized Weight
120kg
Main Technical Parameters of Bus Duct
| Item | Rated Current (A) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 250 | 315 | 400 | 500 | 630 | 800 | 1000 | 1250 | 1600 | 2000 | 2500 | ||
| Execution Standard | IEC60439.1-1999, IEC60439.2-2000, GB7251.1-2005, GB7251.2-2006 | |||||||||||
| Conductor Material | Cu+Ag ≥ 99.95% | |||||||||||
| Appearance | 6063-T5 Aluminum Alloy | |||||||||||
| Unit Length | 1.6m, 3m, 6m (customizable within 0.5–6m) | |||||||||||
| Protection Degree | IP54, IP65 | |||||||||||
| Rated Insulation Voltage Ui | AC690/1000 | |||||||||||
| Rated Operating Voltage Ue | AC380/660 | |||||||||||
| Rated Frequency | 50–60 Hz | |||||||||||
| Electrical Resistance (R20) (×10⁻³Ω/m) | 65.3 | 64.5 | 60.1 | 58.6 | 53.5 | 49.7 | 43.7 | 38.3 | 28.8 | 25.4 | 20.6 | |
| Electrical Resistance (X20) (×10⁻³Ω/m) | 27.4 | 25.1 | 24.7 | 23.6 | 19.4 | 16.4 | 13.1 | 15.9 | 13.8 | 11.3 | 11.1 | |
| Electrical Resistance (Z20) (×10⁻³Ω/m) | 82.6 | 81.2 | 80.2 | 78.5 | 77.2 | 62.7 | 50.3 | 42.5 | 32.8 | 29.8 | 23.4 | |
| Voltage Drop (cosφ=0.98) (V/m) | 0.049 | 0.062 | 0.061 | 0.059 | 0.058 | 0.056 | 0.054 | 0.051 | 0.049 | 0.048 | 0.049 | |
| Rated Short-Time Withstand Current (1s) | 20kA | 30kA | 30kA | 50kA | 50kA | 50kA | 65kA | 80kA | 100kA | 130kA | — | |
| Rated Peak Withstand Current | 40kA | 63kA | 63kA | 100kA | 100kA | 100kA | 130kA | 160kA | 200kA | 250kA | — | |
| Electric Clearance | ≥10mm | |||||||||||
| Creepage Distance | ≥12mm | |||||||||||
| Insulation Resistance | ≥20MΩ | |||||||||||
| Grounding Resistance | ≤0.01Ω | |||||||||||
| Dielectric Strength | 50Hz, 3.75kV/1min no flashover, no breakdown | |||||||||||
| Temperature Rise | ≤55K, ≤70K, ≤90K | |||||||||||
| Plug-in Box Quantity | Min. every 0.8m | |||||||||||
| Max Span | 2m | |||||||||||
| Mechanical Bearing Capacity | 6–43kg | |||||||||||
| Installation Method | Vertical / Horizontal | |||||||||||
| Conditions of Use |
Indoor use; Altitude ≤2000m; Ambient temperature -5℃ to +40℃, 24h average ≤+35℃; Relative humidity ≤50% at +40℃, may be higher at lower temp; Example: 90% at +20℃; Pollution degree: Class 2. |
|||||||||||
| Centralized Weight | 120kg | |||||||||||
