1. standards
the fire-resistant cable electrical and mechanical properties comply with the national or industrual standard of the same rated voltage cable.the fire-resistant property is accord with IEC60332. the fire-resistant property is accord with IEC60331.
the cable is suitable for places where special fire-resistant requirement is need,such as subways,power plants,hospitals,high buildings and all sorts of amusement sites.
2.type and description
Ordinary type | Flame resistant type | Description |
NH-BV | ZR-NH-BV | Cu conductor PVC insulated (flame resistant) fire-resistant cables |
NH-BVV | ZR-NH-BVV | Cu conductor PVC insulated and sheathed (flame resistant) fire-resistant cables |
NH-KVV | ZR-NH-KVV | Cu conductor PVC insulated and sheathed (flame resistant) fire-resistant control cables |
NH-KVV22 | ZR-NH-KVV22 | Cu conductor PVC insulated and sheathed internal steel tape armored (flame resistant) fire-resistant control cables |
NH-VV | ZR-NH-VV | Cu conductor PVC insulated and sheathed (flame resistant) fire-resistant power cables |
NH-VV22 | ZR-NH-VV22 | Cu conductor PVC insulated and sheathed internal steel tape armored (flame resistant) fire-resistant power cables |
NH-YJV | ZR-NH-YJV | Cu conductor XLPE insulated and PVC sheathed (flame resistant) fire-resistant power cables |
NH-YJV22 | ZR-NH-YJV22 | Cu conductor XLPE insulated and PVC sheathed internal steel tape armored (flame resistant) fire-resistant power cables |
4.specification
Number of cores: 1 to 61
Nominal cross-sectional area: 1.5 to 630mm2.
5.using properties
Fire-resistant property
The cable fire-resistant property is tested according to GB/T or IEC60331.
ZB: temperature of flame is 750℃ to 800℃,time of supply fire is 90 minutes;
ZA: temperature of flame is 950℃ to 1000℃,time of supply fire is 90 minutes;
Test result: 3A fuse must not be fused in 90 minutes at rated voltage.
Operation characteristic
XLPE insulated cable:
The maximum operating temperature of cores shall not exceed 90℃ when the cable is used for long period. The temperature of cores shall not exceed 250℃ at a short circuit (The max. duration dose not exceed 5 seconds).
PVC insulated cable:
The maximum operating temperature of cores shall not exceed 70℃ when the cable is used for long period. The temperature of cores shall not exceed 160℃ at a short circuit (The max. duration dose not exceed 5 seconds).
The installation circumstance temperature shall not be below 0℃. The bending radius shall not be less than 10 times the outer diameter of
