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Refractory cable

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Refractory cable

  • 耐火电缆
  • Category: Power cables

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  • Release Date: 2018/08/16
  • Online Inquiry
Detailed introduction

Overhead insulated conductors clarify:

Refractory wire refers to the wire that can maintain a certain amount of time to run safely under the flame out condition.

Conditions of use:

1. AC additional voltage: U. / U (V series: 600 / 1000V, K series: 450 / 750V, B series: 450 / 750V).

2.High temporary task temperature of cable

(1) Polyolefin insulation and sheath: 70 ° C and 105 ° C; XLPE insulation: 90 ° C;

(2) Fluoroplastic insulation and sheath: 220 ° C and 260 ° C; Fluoroplastic insulation and 105 ° C flame retardant PVC sheath: 90 ° C and 125 ° C.

(3) Low-halogen and low-smoke flame-retardant PVC insulation and sheath: 70 ℃; halogen-free low-smoke flame-retardant polyolefin insulation and sheath: 90 ℃ and 125 ℃.


3. Lower ambient temperature:


(1) Flame retardant PVC insulation and sheath: fixed laying -40 ° C; non-fixed laying -15 ° C;


4. The safe laying temperature of the cable should not be lower than 0 ℃.



model

NA-YJV / NB-YJV

XLPE insulated PVC sheathed A (B) fire-resistant power cable

It can be laid in rooms, tunnels and pipes that require fire resistance.

NA-YJV22 / NB-YJV22

XLPE insulated steel tape armored PVC sheathed A (B) fire-resistant power cable

Suitable for laying in the ground when fire resistance is required, not suitable for laying in pipelines.

WDNA-YJY / WDNB-YJY

XLPE insulated polyolefin sheath A (B) halogen-free low-smoke fire-resistant power cable

It can be laid in indoors, tunnels and pipes that require halogen-free, low smoke and fire resistance.

WDNA-YJY23 / WDNB-YJY23

XLPE insulated steel tape armored polyolefin sheath A (B) halogen-free low-smoke fire-resistant power cable

It is suitable for laying in the ground when halogen-free, low-smoke and fire resistance is required, not suitable for laying in pipelines.


The refractory wire can continue the task (transmit current and signal) in the event of a fire. Whether it is self-sustaining or not is not included in the assessment. The flame retardant wire quickly suspends the task in the event of a fire. Its function is to be flame retardant and does not involve self-extinguishing. The refractory wire maintained normal operation for 180 minutes while the flame was extinguished at 750 to 800 ° C.


Fire-resistant wires are actually another type of fire-resistant wires. It is made of copper as the conductive wire core, seamless copper tube as the sheath, and inorganic mineral magnesium oxide as the insulation material.


Because the whole is made of inorganic materials, the entire fire-resistant wire is neither extinguished nor flammable. And can withstand fire. According to the experiment, it is indicated that when the wire is burned in the flame at 800 ~ 900 ℃ for 2 hours, the electric wire keeps running normally. After being extinguished under the flame of 1000 ℃ for 30 minutes, it is still intact and continues to operate normally. The normal normal task temperature is 250 ℃, which can run safely and reliably.

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Keywords: overhead insulated conductor

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