Bus Duct
NHKMC1 Fire-Resistant Busway With 4P Or 5P And Rated Current 250A~6300A
Product Parameters
Executive standard |
IEC61439-6,GB7251.1,HB7251.6 |
System |
Three-phase three-wire, three-phase four-wire, three-phase five-wire, three-phase five-wire (shell as PE) |
Rated frequency f (Hz) |
50/60 |
Rated insulation voltage Ui (V) |
1000 |
Rated working voltage Ue (V) |
380-690 |
current (A) |
250A～6300 |
Product Technical Parameters
- NHCCX series busways are in compliance with IEC60439-1~2, GB7251.1-2, JISC8364, GB9978 standards for each performance.
- The busway can withstand 2500V frequency withstand voltage for 1min without breakdown and flashover.
- The busway is able to withstand strong electric and thermal stresses due to the use of high-strength ceramic as the phase separation material. According to the data in Table (2), the busways passed the dynamic and thermal stability test and showed undetectable ^ deformation after the test.
Rated working current（A） |
250 |
400 |
630 |
800 |
1000 |
1250 |
1600 |
2000 |
2500 |
3150 |
Short-time withstand current（A） |
10 |
15 |
20 |
30 |
30 |
40 |
40 |
50 |
60 |
75 |
Peak withstand current（A） |
17 |
30 |
40 |
63 |
63 |
84 |
84 |
105 |
132 |
165 |
|
The temperature rise of the conductive parts of the busway trough does not exceed the values listed in the following table when the rated current is passed for a long time | |
conductive part |
Maximum allowable temperature rise（K） |
connection terminals |
60 |
Housing |
30 |
Product Selection Table
Current level（A） |
Name |
NHKMC1 Fire-resistant busway/4P |
NHKMC1 Fire-resistant busway/5P |
||
Dimension |
Wide(mm) |
High(mm) |
Wide(mm) |
High(mm) |
|
250A |
192 |
166 |
213 |
166 |
|
400A |
192 |
176 |
213 |
176 |
|
630A |
195 |
176 |
213 |
176 |
|
800A |
195 |
196 |
213 |
196 |
|
1000A |
195 |
206 |
213 |
206 |
|
1250A |
195 |
236 |
213 |
236 |
|
1600A |
208 |
226 |
232 |
226 |
|
2000A |
208 |
246 |
232 |
246 |
|
2500A |
224 |
276 |
250 |
276 |
|
3150A |
224 |
306 |
250 |
306 |
|
Current level（A） |
Name |
NHCCX Fire-resistant busway/4P |
NHCCX Fire-resistant busway/5P |
||
Dimension |
Wide(mm) |
High(mm) |
Wide(mm) |
High(mm) |
|
250A |
240 |
180 |
261 |
180 |
|
400A |
240 |
180 |
261 |
190 |
|
630A |
243 |
190 |
261 |
190 |
|
800A |
243 |
210 |
261 |
210 |
|
1000A |
243 |
220 |
261 |
220 |
|
1250A |
243 |
250 |
261 |
250 |
|
1600A |
256 |
258 |
280 |
258 |
|
2000A |
256 |
278 |
280 |
278 |
|
2500A |
272 |
308 |
298 |
308 |
|
3150A |
272 |
338 |
298 |
338 |
|
Current level（A） |
Name |
NHKMC2 Fire-resistant busway/4P |
NHKMC2 Fire-resistant busway/5P |
||
Dimension |
Wide(mm) |
High(mm) |
Wide(mm) |
High(mm) |
|
250A |
161 |
128 |
164 |
128 |
|
400A |
161 |
138 |
164 |
138 |
|
630A |
161 |
148 |
164 |
148 |
|
800A |
161 |
158 |
164 |
158 |
|
1000A |
161 |
178 |
164 |
178 |
|
1250A |
161 |
208 |
164 |
208 |
|
1600A |
161 |
248 |
164 |
248 |
|
2000A |
169 |
248 |
173 |
248 |
|
2500A |
169 |
283 |
173 |
283 |
|
3150A |
169 |
308 |
173 |
308 |
|
Advantage
High load-bearing capacity
This type of busway channel adopts steel profile shell, which can carry 70kg of pressure in the center of the 3m span busway, and the center of the plate shell can be shifted by no more than 5mm when the temperature changes non-uniformly.
Long fire resistance time
Fire-resistant series busways are divided into NHCCX, NHKMC1 and NHKMC2 according to the structure type and the form of fire-resistant insulation treatment, and their corresponding fire-resistant limits under energized conditions are shown in the table.
Model |
Structure form |
Fire resistance limit(min) |
Fire-resistant temperature(℃) |
Applications |
NHCCX |
Dense |
60 |
850 |
Normal power supply |
Firefighting power supply | ||||
NHKMC1 |
Air type |
60 |
900 |
Normal power supply |
Firefighting power supply | ||||
NHKMC2 |
Air type |
120 |
1050 |
Firefighting power supply |