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.
This resistance reduction is comprises of diversiform
ingredient including electrolyte, firming agent,
lube, filling material. As a good conductor, It
can impinge on the metallic earth to form
circulating surface of current as well as infiltrate
into the soil to form an area of low resistance
around the grounding body.
二、usage
scale
It
is widely used for grounding device in all walks
of national economy such as electricity, telecom,
architecture, broadcast, television, railway, highway,
voyage, water carriage, national defence &war
industry, metallurgy&mine, coal, petroleum,
chemical industry, textile, medicine &sanitation,
culture&education, publication&printing.
三、Main
Technical Parameter
1、dropping
resistivity:40%-95%(more resistivity of soil leads
to more resistance dropping)
2、stability&long
residual action: The period of validity of resistance
reduction is 10-20 years.
3、It
has stronger water retention, water absorption.
4、Other
performance index: referring to following table:
Summary
Table of Test for Resistance Reduction
serial
number
name of testing item
requirements
trial
value
conclusion
1
resistivity
measuring test at room temperature
assessing of chemical&physical
performance
P≤5Ω.m
ρ=0.5Ω.m△
eligibility
2
a、water
loss test
after-test
ρ=0.6Ω.m
pass
b、hot-cold
alternating test
P≤5Ω.m
ρ=0.48Ω.m
pass
c、wet
steep test
ρ=0.6Ω.m
pass
3
tolerance
for impulse current test
△R％≤20％
△R％≤2.4％
pass
4
tolerance
for power current test
△R％≤20％
△R％≤-27％
pass
5
PH value
measuring
test
PH
value range from 7-12
PH＝8
eligibility
resistance
reduction-steel grounding body
corrosion
test
average
corrosion rate on surface
≤0.03mm/year
average
corrosion on surface(mm/year)range(mm/year)
