01

Polymer Housed Lightning
Arrester With Lead wire

Is a protection device installed in the processing distribution line to limit the overvoltage of the power system such as lightning surge, switching surge and so on. It is manufactured using a ZnO-type Gapless device with excellent non-linear V-I characteristics in a polymer housing with excellent weather resistance and electrical characteristics. It is designed with a stable structure that prevents heat splashing and scattering caused by explosion of protective device. In addition, the housing and lead wire are injection-molded to improve watertightness.

• FEATURES

  • If an abnormal voltage is applied, discharge to the ground to protect the power equipment
  • Excellent response to surge by adopting ZnO type gapless element
  • It is designed to discharge the internal pressure of the lightning arrester when it is subjected to thermal runaway due to fault, so it can be prevented from explosion and scattering.
  • Compact and lightweight FRP structure with silicone rubber and filament winding, easy to handle and install, and no lead wire connection due to lead wire attached.
  • Integral injection mold structure allows complete moisture shutoff inside
  • Optimum structure for application in the field and excellent long-term longevity

• TECHNICAL DATA

  Rated Voltage	18 kV	Lightning shock limit voltage	60 kV Below
  Nominal discharge current	5 kV	Large Current Discharge Resistance	65 kA
  Continuous operation voltage	15.3 kV	Lightning shock withstand voltage	78 kV
  Reference voltage(DC 1mA)	22.9 kV More than

02

Sheath Voltage Limiter

The sheath voltage limiter protects the cable layer, the GIS termination (EB-G) of the underground transmission cable, and the insulator of the insulation joints. When a lightning surge or a switching surge is applied to a cable, a surge is generated in the method layer and the cable shield layer to protect the insulation layer of the cable layer from being destroyed. SVL was fabricated using a ZnO-type gapless device with excellent nonlinear V-I characteristics, and was designed to have a safety structure that prevents explosion when the protective device is broken due to thermal runaway.

• FEATURES

  • It is made of explosion-proof structure composed of FRP made by filament winding and does not affect other facilities due to failure.
  • Since it is integrally molded with silicone rubber, it is waterproofed at the factory, and it is a perfect waterproof structure that does not penetrate moisture even when exposed to water for a long time.
  • Only one side of the connection line is subjected to field conditions, so that it can be compressed and installed.
  • Made of silicone rubber with self-extinguishing properties, it is a flame retardant structure with no risk of fire.

• TECHNICAL DATA

  	1 Class(154kV)	2 Class(345kV)
  Rated Voltage	3.75 kV	5 kV
  Nominal discharge current	3 kV	4 kV
  Operating Voltage (DC)	2mA/4.2~6.4 kV	1mA/6.0~8.0 kV
  Protective Level : lightning impulse limiting voltage (10kA, 8/20㎲)	up to 11.5 kVp	up to 13 kVp
  Protective Level : fast-rising impulse starting voltage (10kA, 8/20㎲)	up to 12.5 kVp	up to 16.5 kVp
  Protective Level : switching impulse limiting voltage (500A, 30/60㎲)/th>	up to 9.5 kVp	up to 12.5 kVp
  Line discharge class/th>	Energy absorption capacity over 10kJ	Energy absorption capacity over 22kJ

03

Cleat for phase Isolation

Install spacing brackets to allow spacers to be installed and spaced apart from each other during intervals where transmission capacity is insufficient. It is possible to maximize the transmission capacity without replacing the cable, thereby reducing costs such as replacement work and expansion of electric power.

Effect of application

• Increase ground transmission capacity by 8%.
• The construction cost is reduced by 3.2 billion won per km (345kV XLPE 2500mm2, phase isolation 50mm)
• It is possible to change the uniform installation method (Manpower-based installation -> mechanization installation method)

• PRODUCT DRAWING

  

• TECHNICAL DATA

  		Data	Reference
  Main Body	Material	AC7A	AC7A
  	Tensile strength	OVer 210 N/㎟	KS D6008
  	Elongation	Over 12%	KS D6008
  	Hardness	Approx 50	KS D6008
  Rubber plate	Material	CR rubber or equivalent performance
  	Flame resistance	Flammability (M3105 A method)	KS M 3015
  	Hardness	Over 52 HS	KS M 6518
  	Tensile strength	Over 14.7 N/㎟	KS M 6518
  	Elongation rate	Over 350%	KS M 6518

04

MV Plug-In CONNECTION

It can operate not only 25.8kV KEPCO underground power line but also 52kV ground voltage 26kV nominal current 1250A. This is a connection material applied to MV power equipment such as GIS, CGIS, transformer, etc. MV Plug-in connection is equipped with MV power equipment in advance and after completion of test delivery of the Test and Adapter Connector in the assembled state, It is a product that is easy to install and install because it has a structure that connects underground cable with plug connection material and inserts into socket after installation work.

• STANDARD

  Size			3			3-S
  Max. operation voltage	Um	(kV)	42			52
  Rated voltage	U	(kV)	36			45
  Line-to-earth-votage	U。	(kV)	20.8			26
  Nomianl current	In	(A)	1250			1250
  Conductor			RM	RE	RF	RM	RE	RF
  Cross section(Guide value)2)	Min. Max.	(㎟) (㎟)	35 800	95 1000	25 400	35 800	95 1000	25 400
  Cross section(Guide value)2)	Min. Max.	(㎜) (㎜)	15.5 46.0	46.0 55.0		15.5 46.0	46.0 55.0
  Votage tap			With Without	Without (XL)		With Without	Without (XL)
  Diameter of insulation3) after removing the outer semi-conducting layer	Min. Max.	(㎜) (㎜)	6.1 36.0	10.5 36.0	6.5 26.8	6.1 36.0	10.5 36.0	6.5 26.8
  Rated AC voltage	5min.	(kV)	95			117
  Partial discharge level at 2 x U。		(kV)	200			≤10
  Rated lightning impulse withstand voltage (BIL)		(kV)	200			250
  DC voltage test	15min.	(kV)	125			156
  Rated short time current	1s 3s	(kA) (kA)	60 40			60 40
  Rated impulse current		(kA)	150			150

05

Epoxy Product

We have Automatic Pressure Gel Process (APG) facilities to manufacture epoxy insulators for various power equipment up to 66kV class, and we design, manufacture and supply according to customer's request. We can select epoxy materials, product design and technical support according to customer requested quality. We also have complete manufacturing technology to provide epoxy insulation products for high quality electric power equipment. Our APG system has the technology to minimize the manufacturing process defects by designing and manufacturing the equipment based on its long experience, and it also has the mold designing technology optimized for the equipment, so the epoxy for the power equipment up to 66kV Insulated products provide competitive price and quality.

06

Metal fittings

All power devices are composed of insulating material that insulates the conducting conductor from the conducting conductor. Among them, metal fittings for connecting the conductors use various connecting methods depending on the type and shape of the conductor. As the resistance of the conductor metal is increased due to the electrical and chemical corrosion caused by the use environment, the heat of the connection part is increased and the electric equipment is frequently damaged by the deterioration of the insulator by heat. EPE can provide the design and manufacturing services of metal fittings for conductor connection suitable for use environment of power equipment to prevent electric equipment accident.

• KINDS

  • Shear bolt type conductor connection
  • Cu-Cu conductor connection
  • Al-Al conductor connection
  • Cu-Al welding transition connection
  • Multi-Contact type conductor connection
  • Tulip contact type conductor connection
  • Various metal fittings related to other power equipment

07

Copper wire mesh

Copper mesh tape supplied by EPE is used for the shielding of cable accessories. It is knitted with annealed copper wire which is plated with tin. It is excellent in conductivity and excellent in workAbility because it has excellent conductivity. As an excellent material, it can be applied as a shielding material for various power equipment.
Tin-plated copper mesh tape is excellent in soldering workAbility and provides excellent shielding effect when shielding parts exposed to corrosive environment or contact with sulfur-added rubber materials.

08

Arrester elements

Metal oxide varistors (MOV devices), which are sintered by mixing zinc oxide (ZnO) and other metal oxide additives, have a ceramic layer with uniform zinc oxide crystal size and high resistance to microvoids between crystal lattices.
It maintains insulation performance at normal voltage, but performs a lightning protection function in which an abnormal voltage acts as a conductor when applied. The devices fabricated in a perfect manufacturing process have excellent nonlinear V-I characteristics. Since quality inspection is carried out by conducting full inspection, uniform and perfect quality arresters can be manufactured.
Available product specifications are from Φ25 to Φ136, and it can be manufactured in series or parallel to make various DC, AC, distribution, and lightning arresters. EPE offers such metal oxide varistors (MOV devices) at competitive prices and excellent quality, and offers customized design, development and production services.

• CHARATERISTICS OF ZINC OXIDE MOV ELEMENTS

  • Surge capacity is large.
  • Fast response to the surge voltage and excellent protection characteristics.
  • It is easy to shut off the fast flow because there is no fast flow.
  • The voltage-current characteristic is symmetrical (DC-AC applicable).
  • High reliability with high stability.
  • Ceramic structure with low energy tolerance and high capacitance.