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YCC-NHMC Refractory Busbar
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Product Details
Product Overview
Fire-resistant busbars consist of a fire-retardant coated shell, busbars wrapped with fire-resistant mica tape, and a support made of fire-resistant insulating material. The support has multiple grooves, which house and secure the busbars. There is a busbar connection box at one end of the busbar and a busbar tap box inside the busbar. The fire-resistant busbar has excellent insulation properties, can be used continuously in normal environments, and can be used continuously for more than 180 minutes in a fire environment. It is suitable for high-rise buildings and important facilities, replacing fire-resistant cables for power transmission and distribution.
Application Scope
Fire-resistant busbars are suitable for power transmission and distribution systems with a rated voltage of less than 690V, a rated operating current of 250-5000A, and a frequency of 50-60Hz. After years of testing and industrial operation, its electrical properties, fire resistance, and metallic structure have reached the advanced domestic level.
Product Features
● Structural Design
It adopts a reasonable "sandwich" phase wire tightly stacked structure design. The busbar is compact and small in size. The busbar system has the advantages of low impedance, low voltage drop, and good dynamic and thermal stability.
● Steel Shell
The shell is made of cold-formed thin steel profiles. The two side plates are a unique double-layer hollow structure, which effectively prevents high-temperature gas or open flames from directly entering the inside of the busbar. The surface of the busbar shell is galvanized and sprayed with fire-retardant paint (when encountering fire, the paint can quickly expand at a geometric rate on the surface of the busbar, forming a dense carbonized heat insulation layer, sealing all gaps in the busbar shell, and preventing high temperatures from directly entering the inside of the busbar).
● Connector
The connector uses special fire-resistant insulation components, which are reliable and easy to connect.
● Corrosion Resistance
Excellent corrosion resistance, resistant to chemical corrosion, electromagnetic interference, and animal and insect bites.
● Long Service Life
UV resistant, does not age when used outdoors, maintenance-free, and has a service life of up to 50 years.
Technical Parameters
| Busbar Model | YCC-NHMC |
| Ambient Temperature | -45℃~+60℃ |
| Standards Met | GB7251.1.GB7251.2、GA537、ICE60331.BS6387、GB4208、GB5585.1、IEC439-1.IEC439-2,KEMA |
| Electrical Technical Specifications | |
| Rated Operating Voltage | 400-1000V |
| Rated Insulation Voltage | 690/800/1000V |
| Rated Current | 400-5000A |
| Rated Frequency | 50 HZ |
| Protection Level | Ip66 |
| Insulation Level | 1000 Q/V |
| Insulation Resistance | >500 MQ |
| Power Frequency Withstand Voltage | Dry test 3750 V/1min |
| Fire Resistance Time | 180min |
| Trunking Color | Light gray/light yellow |
| Installation Method | Horizontal/Vertical Installation |
| Short Circuit Current Rating | The YCC-NHMC fire-resistant busbar provides stable and efficient power transmission and has extremely high short-circuit withstand capability. It has also passed the third-party verification of short-circuit withstand capability by CQC. |
| Rated Current | Rated short-time withstand current (KA)t=1s | Rated peak withstand current (KA) |
| 400A | 30 | 63 |
| 630A | ||
| 800A | 30 | 63 |
| 1000A | ||
| 1250A | ||
| 1600A | 100 | 220 |
| 2000A | ||
| 2500A | ||
| 3200A | 100 | 220 |
| 4000A | ||
| 5000A | 100 | 220 |
| 6300A |
Resistance, reactance, impedance and voltage drop (50Hz)
| Rated Current (A) | Resistance (R) mΩ/m | Reactance (X) mΩ/m | Impedance (Z) mΩ/m | Voltage Drop v/m | IP |
| 400 | 0.157 | 0.093 | 0.182 | 0.1 | 68 |
| 630 | 0.096 | 0.085 | 0.128 | 0.1 | 68 |
| 800 | 0.069 | 0.025 | 0.073 | 0.1 | 68 |
| 1000 | 0.051 | 0.019 | 0.054 | 0.11 | 68 |
| 1250 | 0.038 | 0.014 | 0.040 | 0.11 | 68 |
| 1350 | 0.036 | 0.013 | 0.038 | 0.11 | 68 |
| 1600 | 0.030 | 0.011 | 0.031 | 0.11 | 68 |
| 1700 | 0.027 | 0.010 | 0.029 | 0.11 | 68 |
| 2000 | 0.025 | 0.009 | 0.027 | 0.11 | 68 |
| 2500 | 0.019 | 0.007 | 0.020 | 0.11 | 68 |
| 3150 | 0.015 | 0.008 | 0.016 | 0.12 | 68 |
| 4000 | 0.012 | 0.005 | 0.013 | 0.12 | 68 |
| 5000 | 0.008 | 0.004 | 0.009 | 0.13 | 68 |
| 6100 | 0.006 | 0.003 | 0.007 | 0.14 | 68 |
| 6300 | 0.005 | 0.002 | 0.005 | 0.15 | 68 |
Keywords: YCC-NHMC Refractory Busbar
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