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  　　This kind of Resistance-reduce-agent is composed of many ingredients, including electrolyte, curing agent, lubricant, electro-conductive cement and stuffing materials. As one excellent electric conductor, it is used between grounding part and earth. On the one hand, it can be closely connected to metal grounding to form enough current surface; on the other hand, it can infiltrate into soil near it to lower resistance and form one low resistance district around grounding parts.
 
 
     
 
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12.Thunder Protection Device for Computer Network

QPRJ series computer network surge protection device
The appearance of QPRJ series computer network surge protection device adopts the international popular color and static lacquer coating of metal surface; this product is suitable for sensitive communication network lines such as computer network equipment, Router, HUB and MODEM, which will make these equipments avoid the damage caused by over-voltage, disturbed by power and static discharge etc.

■ Working principle
● Adopting front and back second protection; the first protection is coarse protection; the third protection is for discharging energy; the second protection is fine protection used in clamping.
● The front and back two grades make the surge protection device have excellent anti-thunder effect through coupling.

■ Main characteristic
● Complete sorts for matching different products and different interfaces.
● Low residual voltage and small attenuation( ≤ 0.5dB )
● High transmitting speed 10~155(Mbps)
● Convenient installation and large flow capacity
● Central type protection (any request for 1-24 circuit)

■Technical Parameter

Type
Special Impedance
Connecting Interface
Transmitting Rate
Inserting Loss
Protected Foot
External Dimension
Nominal Flow
Order No.
(Ω)
(Mbps)
(dB)
(mm)
(KA)
QPRJ45-24DS 　　100 　RJ45 　　100 　　0.5 1、2、3、6/whole pin 　92×40×25 　　5 　5320
QPRJ11-24DS 　　100 　RJ11 　　10 　　0.2 　according to client's request 　92×40×25 　　5 　5321