E2
Lightning Arresters /Surge Absorbers
C
O
N
T
E
Polymer Type Lightning Arrester
N
T
S
E2-2
Porcelain Type Lightning Arrester
E2-4
Main Structure & External Structure
E2-6
Surge Absorber
E2-8
Table on Selection Criteria
& Operating Principle
E2-10
External Dimensions
E2-12
Certification
E2-14
Lightning Arresters _ Feature
PolymerTypeLightningArrester18kV5kA
VITZRO TECH Polymer Type Lightning Arrester is the 18kV, 5kA product that is used at KEPCO distribution line and general
consumers. In order to prevent the explosions due to humidity absorption deterioration, the major faults that are generated
at the existing porcelain-type lightning arrester, winding is done using FRP insulators. The interface between the FRP insulator
and high-molecular rubber housing is treated and both ends of polymer-type lightning arrester are air-tightened using the cap.
It is a product made up of high-molecular materials so that the polymer-type lightning arrester does not spatter when exploded.
E2-2
VITZROTECH
Features
It is designed and manufactured based on the accumulated experiences and actual test evaluation.
It is superior in preventing the moisture absorption since its air-tightening is excellent.
It is light-weighted (2.4kg) when compared to the porcelain-type lightning arrester.
It prevents secondary accidents (fragment scattering and etc.) when it explodes due to internal
temperature rise and expansion of arc resulting from the transient fault current.
It is safe since the disconnector is a resistance-type.
Creeping leakage distance is 645mm or more.
It used an insulated rubber cover that does not allow the rain to penetrate to the upper terminal part.
Applied Standard : IEC60099-4, IEEEStd C62-11, JEC217, KEPCO Standard Purchase Specification
ES153-264~283, KSC4609
▶
Type & Rating
Type
KMX-18
Rating Voltage
kV
Applied Circuit Voltage
kV
18
22.9
Standard Voltage (V1mA D.C) kV
22 .9 or above
Residual Voltage (8×20㎲) kV
66 or below
Classification Current
kA
5
Discharge Withstand Current (4×10㎲) kA
65
Rated Frequency
Hz
60
Weight
(kg)
2.4
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-3
Lightning Arresters _ Feature
PorcelainTypeLightningArrester18kV2.5kA
LA for VITZRO TECH Power Distribution is developed into the most-wanted 18kV, 2.5kA using only our technology
and passed KEPCO-KERI test to be adopted as the domestic product from KEPCO. Also, this product is applied with
the non-linear resistance of ZnO element.
E2-4
VITZROTECH
Features
Its performance is excellent due to VITZRO technology, operational characteristic is
superior and anti-pollution characteristic is significantly improved.
•It can respond to fast-rising voltages by applying gapless type.
•There is enough space due to its compact size and light weight (Capacitance ratio of 80%
compared to the Gap Type)
•It is a non-follow current lightning arrester.
•It enhanced the reliability through a simplified structure.
•Applied Standard : IEC60099-4, IEEEStd C62-11, JEC217, KEPCO Standard Purchase Specification
ES153-264~283, KSC4609
▶
Type & Rating
Type
KMZ-18
Rating Voltage
kV
18
Applied Circuit Voltage
kV
22.9
Standard Voltage (V1mA D.C) kV
22 .9 or above
Residual Voltage (8×20㎲)
kV
65 or below
Classification Current
kA
2.5
Discharge Withstand Current (4×10㎲) kA
25
Rated Frequency
Hz
60
Weight
(kg)
3.7
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-5
Main Structure
Disconnector
Disconnector is a device to prevent faults from spreading by promptly disconnecting the arrester from the
line when the zinc oxide element deteriorates inside the arrester. It is largely divided into Coil Type and
Resistance Type. The coil type has the element to change the residual voltage and waveform in case of
the residual voltage input and the resistance type maintains the stable residual voltage and waveform.
Our firm adopted the resistance type disconnector with higher reliability. The following table represents
the characteristic test result on disconnecting time-current curve of the disconnector.
Test Current
(A, rms)
Test Voltage (kV, rms)
Operating Time* (ms)
2.5kA Lightning Arrester 5kA Lightning Arrester 2.5kA Lightning Arrester 5kA Lightning Arrester
800
2.6
5.24
3.1
4.0
200
2.6
5.24
5.9
5.0
20
2.6
6.5
50
40
※ The operating time is the mean of 5 different test currents.
Housing
Housing is an important part that endures the insulation of external arrester. Our products are classified
into Polymer Type Housing and Porcelain Type depending on the material used.
Hanger
Hanger is a part used for mounting and there are 2 types of hangers in our company - Galvanized Type
and BMC Type with excellent outdoor insulation.
Earthing
Use standardized cables for LA earthing work and it should not connect to the distribution panel ground
bus when installed inside the power receiving/distributing panel.
E2-6
VITZROTECH
Lightning Arresters and Surge Absorbers
External
Structure
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-7
Surge Absorbers _ Feature
Surge Absorbers 3.3/6.6/18kV 5kA
It is a surge absorber (SA) that is applied with the advanced insulating material, POLYSIL, and it is fully air-tightened into
a mold structure. There is no drop of residual voltage due to outside burning and it performs a perfect surge protection
without changing the characteristic even at the polluted area.
E2-8
VITZROTECH
Features
It adopted POLYSIL full-molding that can be used outdoors.
Based on the optimal design for outdoors, it is light-weighted.
It is recognized for its quality since it passed KERI Test for the first time in the country.
It ensures the stability by applying incombustible materials when there is a fault inside the distribution panel.
Applied Standard : IEC60099-4, IEEEStd C62-11, JEC217, KEPCO Standard Purchase Specification
ES153-264~283, KSC4609
▶
Type
Type & Rating
KMSA-3.6
KMSA-7.2
KMSA-18
Rating Voltage
kV
3.3
6.6
18
Applied Circuit Voltage
kV
3.6
7.2
22.9
Standard Voltage (V1mA D.C)
kV
9 ~ 10
18 ~ 20
30 or above
Residual Voltage
kV
13 or below
26 or below
65 or below
Classification Current
kA
5
5
5
Discharge Withstand Current (4×10㎲) kA
40
40
40
Rated Frequency
Hz
60
60
60
Weight
(kg)
0.41
0.6
2.15
Connection
Method
E2
Lightning Arresters / Surge Absorbers
E2-9
Lightning Arrester/
Surge Absorbers
* Surge Absorber should be connected to the load terminals of VCS and VCB and use a flexible cable for the earthing part.
[Table 1]
Table on
Selection Criteria
Product Type
Voltage
Protector
VCS
3kV
VCB
6kV
3kV
6kV
20kV
Not Required Not Required
Not Required
-
Cage Type
Direct Starting
Induction
Refer to Table 2
KMSA-3.6
KMSA-7.2
-
Motor
Refer to Table 2
KMSA-3.6
KMSA-7.2
-
Not Required
KMSA-3.6
KMSA-7.2
-
KMSA-3.6
KMSA-7.2
Distribution Line
Reactor Starting
Motor
Coil Type
Synchronism
Generator
KMSA-7.2
Not Required (75kW or below)
Not Required
Oil-filled
KMSA-3.6
KMSA-7.2
Required when less than 800kVA (KMSA-3.6/7.2)-Refer to Table3
KMSA-3.6
KMSA-7.2
KMSA-18
Transformer Mold
Not Required
KMSA-3.6
KMSA-7.2
KMSA-18
Dry Type
Not Required
KMSA-3.6
KMSA-7.2
KMSA-18
Condenser
Not Required
Not Required
Not Required
Not Required
Combination of Transformer
& Induction Regulator
Not Required
Condenser
Condenser
-
[Table 2]
When Applied
Equipment Voltage
Cable
Direct Starting
Reactor Starting (50%TAP)
75kW or below 75kW or above 150kW or below 150kW or above
3kV inching
When 3kV inching
run is applied
Equipment Voltage
50m or below
Not Required
50 ~ 200m
Condenser Not Required KMSA-3.6
Not Required
200m or above
Condenser Not Required KMSA-3.6
Not Required
Direct Starting
Cable
25m or below
6kV
Not Required
Reactor Starting
300kW or below 300kW or above 600kW or below 600kW or above
Not Required
Not Required
25 ~ 200m
KMSA-7.2 * Not Required KMSA-7.2 * Not Required
200m or above
KMSA-7.2 * Not Required KMSA-7.2 * Not Required
* When Inching is used, use the condenser type.
[Table 3]
In case of
a Generator
E2-10
VITZROTECH
3kV
800kVA or below (KMSA-3.6)
800kVA or above (KMSA-3.6)
6kV
800kVA or below (KMSA-7.2)
800kVA or above (KMSA-7.2)
Lightning Arresters and Surge Absorbers
LA & SA
Principle
A silicon carbide (SiC) element of the existing Gap Type LA and SA is the 200㎛ SiC particle which is
contacted in 3-dimension is sintered by the magnetic bonding material such as clay and its non-linear
voltage-current characteristic results from the contact property of SiC particle. The sintered body with the
zinc oxide as the main ingredient (ZnO element) contacts about 5~10㎛ ZnO crystal particle to the highresistance layer which consists of 0.1㎛ Bi2O3 and ZnO sintered particle is in contact with each other with
the thin film in between.
The specific resistance of ZnO sintered particle is far smaller than that of the boundary layer so when the
high voltage is applied to both sides of element, most voltages will be trapped in the boundary layer and
it generates current multiplication which results in ideal non-linear voltage-current characteristic. In case
of SiC-element, large amount of“A”
current flows in the rated voltage to ground and when used continuously,
thermal destruction will occur. So, the Gap Type that uses SiC element should insulate the rated voltage to
ground using the serial gap and not allow the current to flow.
However, ZnO element has an excellent resistance characteristic so less ㎂ of current flows which requires
no serial gap.
Comparison between SiC Element & ZnO Element
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-11
Polymer Type Lightning Arrester External Dimensions
98
(426)
240
External
Dimensions
Lightning
Arresters
68~102
105~131
(155)
Porcelain Type Lightning Arrester External Dimensions
E2-12
VITZROTECH
Lightning Arresters and Surge Absorbers
Surge
Absorbers
18kV, 5kA
6.6kV, 5kA
3.3kV, 5kA
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-13
E2-14
VITZROTECH
Lightning Arresters and Surge Absorbers
E2
Lightning Arrester/
Surge Absorbers
Lightning Arresters / Surge Absorbers
E2-15