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SMC cabinets
SMC cabinets
Overview
As an ideal substitute for the traditional metallic cabinets, the SMC cabinet is characterized by electrical & thermal insulation, flame retardation & low-smoke, aging resistance, corrosion prevention, heat & cold endurance, simple structure, easy assembly, esthetic appearance, light weight and flexible application. SMC HV/LV distribution cabinets and communication & control cabinets can be widely applied in transformer (distribution) stations, industrial and mining establishments, street/highway sides, residential quarters, commercial buildings and other public spaces.
Properties of SMC material
Specifications | Unit | Testing method | Normal value | Test value | |
Physical properties | Density | g/cm3 | GB/T 1033 | 1.75 ~ 1.95 | 1.81 |
Water absorptivity | mg | ISO 62 | ≤20 | 18.3 | |
Mold shrinkage | % | ISO 3521 | ≤0.15 | 0.08 | |
Mechanical properties | Bend strength | MPa | GB/T 1042 | ≥170 | 210 |
Determination of charpy impact strength | KJ/m2 | ISO 179 | ≥90 | 124 | |
Thermal property | Heat distortion temperature |
| ASTM D-648 | ≥240 | 240 |
Flammability | Combustion performance (UL94) | CLASS | IEC 60707 | FV0 | FV0 |
Smoke toxicity | - | GB/T 20285 | - | ZA2 | |
Classification of burning behavior | - | EN 13501-1 | - | B2 | |
Smoke density | - | GB/T 8627 | - | 22 | |
Dielectric properties | Insulation resistance (normal state) | Ω | IEC 60093 | ≥1.0×1013 | 3.0×1013 |
Insulation resistance (24h water soaking) | Ω | IEC 60093 | ≥1.0×1012 | 5.3×1012 | |
Dielectric strength | kV/mm | ASTM D-149 | ≥12 | 17.1 | |
Dielectric loss tangent | - | ASTM D-150 | ≤0.015 | 0.005 | |
Dielectric constant | - | ASTM D-150 | ≤4.5 | 4.1 | |
Arc resistance | S | IEC 61621 | ≥180 | 190 | |
Proof tracking index (PTI) | V | IEC 60112 | ≥600 | 600 | |