Development and Application of MHYV LSZH flame retardant cable

In the past more than 20 years of practice,  MHYV cable has experienced by innovation from Non flame-retardant to flame retardant, especially in the flame retardant cable flame retardancy test method and decision rule (386-1995, MT MT386-2011) issued and implemented, make the flame retardant properties of the mining cable effectively controled and improved.

But the existing MHYV flame retardant cable once heated combustion, the combustion release a large amount of smoke. Although with IEC 61034 or GB/T 61034-1998 measure the light transmittance of under 10%, but the release of hydrogen chloride (HCl) gas content is large, its content is more than 100 mg/g, even up to 200 ~ 300 mg/g. So thick smoke and toxic gases such as H2S and CO of human respiratory irritation and mischief, and narrow in underground environment, the affected people could not escape from the scene of the fire. According to foreign fire white paper records, this kind of "secondary disasters" casualties of personnel accounts for 70% ~ 80% of the entire fire casualties. In China's coal mine fire accident casualties, the number of people suffering from "secondary disasters" proportion is very big.

Flame retardant or Non flame-retardant cable materials will release a large amount of smoke and CO, HC1 gas when burning, in order to avoid or reduce fire accident "secondary disasters", the international electrotechnical commission (IEC) in 1982 and 1982 successively formulated and revised and IEC60754 IEC60754-1-2, in order to limit when releasing gas content (HC1 content < 5 mg/g, release the corrosive gas combustion of the aqueous solution pH > 4.3, conductivity < 10 TTS/ram). In 1991 and established IEC61034, in order to limit when releasing amount of smoke (smoke light transmittance > 60%). The country's naval engineering standard NES a 718 and a NES 713. The U.S. navy MILS24643 directly the NES a 713 standard to detect when releasing toxic gas content (regulation toxicity index < 5).

All these standards to restrict the cable such as flame retardant or not smoke and poison gas released by the combustion flame retardant materials provides effective and reliable basis, but in this high-risk industry, the mining cable in our country on the control of the LSZH cable is almost blank. When coal with low smoke and low halogen flame retardant burning pollution to the environment is smaller than the burning flame retardant cable, namely coal with flame retardant halogen free cable to reduce or reduce when the burning of "secondary disasters; At the same time performance can meet the requirements of coal mine cable material, is the main direction in the future. Research and application of MHYV low smoke low halogen flame retardant cable is very necessary and important.

Anytekabel Co.,ltd.

Telecommunication cables,Drag chain cables,Servomotors cables

Anytekabel Co.,Ltd.(www.anytecable.com) offers an extensive range of flexible cable, control cable, Armoured Cable, Power Cable approved to International certifications,such as UL,CSA,CE,TUV,VDE,SAA.

Telecommunication cables
CW1109 Cable PVC - Twin Twisted jumper wire
Double insulated hook-up wire  
PCM CABLE  PCM(E1)-Pulse Code Modulation switch board cable
LAN cables  

Drag chain cables  
Bus cables
PROFIBUS CABLES
DeviceNet CABLES
INTERBUS CABLES
CAN OPEN CABLES

Servomotors cables
Cables for servomotors with low capacitance, shield, color core code
Power transmission cables for servomotors with low capacitance
Power transmission cables for servomotors with low capacitance
Power transmission cables for Servo Motors
Power transmission cables for servomotors with high dynamic performance

High temperature cables
Silicon cables
SIF CABLE - Silicone Single Core Stranded Cable
YGC YGZ   Removable silicon cable
JG        Lead silicon cable
AGR      Installed silicon cable
AGRP     Braiding shield silicon cable
PTFE, FEP Teflon High temperature cables
PTFE (PTFE) insulated air use wire
FEP-1000V Teflon cable    
High temperature installation control cables
CC-Therm 105°C   Heat-resistant PVC-energy & control cable

Car cables
QVR  Automotive cables
AVSS  Automotive wire (PVC insulated wire of super slim type)
Car lighting cables
Trailer signal connection cables
ABS-EBS braking systems connection cables
Automotive industries single core cables
Specific cables
Container house installation cables
Drum-reeling cable
Crane cables
Elevator cables TVVB  
Elevator cables TVVK
Electric door flat cables
NBR PVC insulated and sheathed bearing controlling soft flat cable
Frequency inverter power cable
Battery cables                              
Arctic cables
measuring cable

Connect cables    
HDTV CABLE
SET-TOP BOX CABLE
TV PLUG
F PLUG
F PLUG
TELEPHONE WIRE RJ11 PLUG
RCA CABLE
LAN PATCH CORD RJ45 PLUG

The role of wire and cable braiding

Wire and cable is mainly composed of conductive wire core, insulation, sheath layer, three basic structure. The difference between the wire and cable has no strict boundaries, but speaking from a broad meaning, cable structure is complex, it has complex sheath layer, and some only conductor and insulation wire structure is simple, some only weave tu la light armor layer or coating a layer of light soft armor layer. The conductive wire core wire and cable is used for the transmission of current. To reduce power loss and voltage, conducting wire core general selection of high conductivity copper and aluminum. The role of the insulating layer is to prevent the current along the radial leakage, ensure use safety. Therefore require insulating layer has good electrical insulating properties. Heat resistance and mechanical strength.
                      

Outside the insulated wire core or a cable core protection layer called the sheath of the cable. The main function is to protect the insulation sheath. Its main performance is moistureproof, prevent oil, anti-corrosion. Anti aging, sun fire resistant, as well as mechanical protection, but also has the electric and magnetic resistance etc. From the perspective of cable sheath, weaving is many kinds of wire and cable sheath or one of the outer sheath. However, according to the materials used in wire and cable braid braid and different parts in the structure of wire and cable, the role of the braid is obviously different.

cable braiding

The effect of fiber braid
For wire, fiber braid is a form of the light cover. Its main function is to protect the insulation is not affected by or less by all kinds of light, heat, moisture, low temperature, acid and alkali gases such as erosion and external mechanical force damage, to ensure that the wires, such as enhanced sheath is in the middle of the rubber or plastic sheath in cotton yarn, hemp fiber braid, in order to improve the strength of the sheath.
The effect of metallic braid
Metal braided layer are mainly copper, tin plated copper wire braid and steel wire (wire) two woven layer
Is the main purpose of seller, copper wire weaving:
1. Preventing electromagnetic interference shielding effect such as tin plated copper wire braided dedicated cable, wire weaving control cable, etc.
2. Eliminate shield of power cable surface potential, it bound power line and eliminate the induction, such as high voltage cable total shielding.
3. The shielding effect of security protection, in the main core insulation braided copper wire and with core or on the ground a good contact, timely response to the leakage situation, such as mining cable shielding
And social, is the main purpose of steel wire armoured:
L. mechanical protection. Such as Marine power cable CF31 type.
2. Under longitudinal tensile force, such as Marine geology exploration using magnetic measurement cable WC - GC, WCT.
3. The magnetic shielding.
By above can see, the role of braid in wire and cable is obvious, wire and cable prices also will be different, choose to pay attention to the use environment of wire and cable, wire and cable, in order to choose the right wire and cable.

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Method to ensure the performance of the cabe Outdoors

The conventional five types of copper cable buried or overhead laying will likely lead to a particular network along the wiring circuit transmission failure, so choose the existing outdoor buried enhanced class cable will bring cheap link.Before deciding the outdoor LAN cable in response to its designed to be fully understood. Over the years, the characteristic of moisture proof protection network has been applied in the communication cable, the aluminum polymeric material overlap the sealing as protection, reduce the water vapor permeability path to prevent water entry.

However an unprotected dry cable will need more than six months to a year due to infiltration of liquefaction, a dry with moisture-proof protection network cable will be completely protected. This design about similar to foil screen LAN cable, cable end connected with simple. So, wiring system designers must consider the application environment, including the parameters of the environment and the influence of the following cable.

If Cable placed on: the eaves. As long as the cable not exposed to direct sunlight or high temperature, standard LAN cable can be used, it is recommended to use pipes. Outside the wall. Avoid direct sunlight metope and artificial damage; In the pipeline. As in the pipeline, pay attention to the damage of the plastic pipe and metal pipe heat conduction; Dangling application/aerial cable. Considering the sag of the cable and stress.The installation of the high flex cable conduit check of dry or wet degree on a regular basis; Underground pipeline. To facilitate future upgrades, cable replacement and phase segregation and surface pressure and the surrounding environment, laying pipe is a good method. But don't hope that the pipeline will stay dry, it will affect the selection of cable types.

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Anytekabel Co.,Ltd.
Tel: +86-519-81099156
Fax: +86-519-81099629
E-mail: anytecable@anytecable.com

Longevity wire --- Nylon Wire

 According to the experience and the domestic test confirmed that the service life of the nylon thread twice that of ordinary PVC insulated wire, can reach more than 40 years. THHN/THWN polyvinyl chloride (PVC)/nylon 600v, polyvinyl chloride (PVC) sheathed control cable.


Structure
Conductor: conform to ASTM - B3 / B8 standard single or multiple strands of fine twisted into a bundle of 14-2/0 awg bare copper wire
Insulation: conform to UL1581 high dielectric strength of flame retardant PVC wire insulation (according to the customer request custom color) meet UL1581 THHN/THWN covering the outer insulation
Filling: three core or more than three core wire core plus padding, torn inside of the outer sheath with a nylon rope.
Sheath: in accordance with UL 1277 is prevented bask in, prevent leakage of PVC wire sheath (according to the customer request custom color)

Characteristics
THHN wire is the termite, rat bite, good heat resistance performance superior safety performance (heat resistant up to 200 degrees c)
Nylon wire on the surrounding environment without any damage, green, environmental protection, is a household decorates equipment power supply, lighting the best wire;
With light weight, smooth appearance, because nylon has its lubricity, threading is not easy to scratch, easy to wear pipe laying, brought to install installation convenience and economy;
Using nylon as sheath, beautiful appearance, small thermal deformation, has good thermal stability;
Has high mechanical strength and excellent abrasion resistance, cold resistance, surface hardness, bending strength, impact strength, chemical resistance, oil resistance, gasoline resistance and self-lubrication;

Application
Installed in the pipe, also can be installed for arbitrary voltage 600v machine tool equipment, home appliances and all kinds of control system.Suitable for indoor, outdoor, overhead, pipe, cable bridge, and no more than 600v circuit of directly buried installation of a variety of ways. For NEC class I, class II and classification of second-class dangerous environment. Its working temperature is 75 ℃ in the damp environment, dry environment of 90 ℃, the temperature is 130 ℃, emergency overload short circuit temperature is 250 ℃.Humid environment is not recommended in this kind of product access work in dc.