Switchgear
Advanced Load Break Switch Solutions for Safe and Efficient Power Distribution
Epoxy Insulated Load Break Switches for 25.8kV Underground Line
This is a sulfur hexafluoride (SF6) gas-free, eco-friendly switchgear applying an arc-suppression format vacuum interrupter (VI), installed on power distribution lines and used for line branching and classification, enabling manual, automatic, and remote operation.
Enhancing Safety & Sustainability
Prevents 3-phase short accidents with a separated structure for individual phase insulator housing
Maintenance-free setup, with no need for a gas or pressure release and locking device [Maintenance Free]
Eco-friendly, using no sulfur hexafluoride (SF6) gas, and resolves danger of explosion from pressurized expansion of the tank section
Uses epoxy for strength against contaminated environments, enabling application even in dusty or soiled areas
Uses vegetable-based insulating oil on the grounded section, giving it 3-4 times better resistance to aging and oxidation than the existing mineral oil and ensuring a semi-permanent lifespan.
Category
Rating
Model [SSYE-PPAD]
44-A
33-A
44-M
33-M
Rated voltage
25.8 kV
Rated frequency
60Hz
Rated current
600A
Load current switching
600A/30A(100%/5%)
Cable charging current
25A/7.5A (100%/30%)
Line charging current switching
1.5A
Loop current switching
600A
Rated short time current
12.5kA, rms
Rated short circuit
making currrent
32.5kA, peak
Power frequency withstand voltage
60kV
Lightning impulse withstand voltage
125kV(main circuit) / 150kV(ground circuit)
Size (W×D×H, cm)
160×86× 110
120×86× 110
160×86× 100
120×86× 100
Rated operating voltage
AC 220V, DC 24V
-
Operating type
Automatic
Manual
Applied specifications
Registration Technical Specifications of KEPCO (GS-5925-0011)
The gas-insulated load break switch, a switchgear that uses sulfur hexafluoride (SF6) gas with superior insulating and arc-suppression performance, is installed on power distribution lines and used for line branching and classification, enabling manual, automatic, and remote operation.
High Safety and Precision in Measurement
Maintenance-free, ultra-lightweight for convenient installation
Insulation and breaking by sulfur hexafluoride (SF6) gas, simple grounding
Enables line voltage and current measurement
High safety, perfectly water-resistant and anti-corrosive
Category
Rating
Model [SSYE-GPAD]
44-A
44-M
33-M
Rated voltage
25.8 kV
Rated frequency
60Hz
Rated current
600A
Load current switching
600A/30A(100%/5%)
Cable charging current
25A/7.5A (100%/30%)
Line charging current switching
1.5A
Loop current switching
600A
Rated short time current
12.5kA, rms
Rated short circuit
making currrent
32.5kA, peak
Power frequency withstand voltage
60kV
Lightning impulse withstand voltage
125kV
Rated SF6 gas pressure
0.5 bar.G at 20℃
Size (W×D×H, cm)
160×80× 130
160×80× 120
120×80× 120
Rated operating voltage
AC 220V,
DC 24V
-
-
Operating type
Automatic
Manual
Manual
Applied specifications
Registration Technical Specifications of KEPCO (ES-5925-0002)
Eco-designed Epoxy Insulated Load
Break Switches for 25.8kv Overhead Line
This is a 22.9 kV switch for overhead power distribution lines, applying the epoxy-insulated and vacuum interrupt formats instead of the existing sulfur hexafluoride (SF6) gas-insulated format, and is of a structure that does not require maintenance due to gas leakage or replenishment.
Enhanced Safety & Performance
Applies internal vacuum interruption format
Switching performance improvement and rise in capacity to 630A rated current
Prevents 3-phase short accidents with a separated structure for individual phases
Resolved danger of high-pressure tank explosion from sulfur hexafluoride (SF6) gas insulation format
Uses epoxy bushing for strength against contaminated environments, enabling application even in dusty or soiled areas
[Maintenance Free] setup, with no need for a gas or pressure release and locking device
Category
Rating
Model [SSYE-ECO]
A
M
Rated voltage
25.8 kV
Rated frequency
60Hz
Rated current
630A
Load current switching
630A/31.5A(100%/5%)
Cable charging current
25A/7.5A (100%/30%)
Line charging current switching
1.5A
Loop current switching
630A
Rated short time current
12.5kA, rms
Rated short circuit
making currrent
32.5kA, peak
Power frequency withstand voltage
60kV
Lightning impulse withstand voltage
150kV
Size (W×D×H, mm)
838 × 540 × 900
Rated operating voltage
AC 220V,
DC 24V
-
Operating type
Automatic
Manual
Applied specifications
Registration Technical Specifications of KEPCO (ES-5925-0004, updated specification)
Gas Insulated Load Break Switches
for 25.8kV Overhead Line
This switch, used with 22.9 kV-Y overhead power distribution lines, was made using sulfur hexafluoride (SF6) gas, which shows outstanding insulation and arc-suppression performance, and is the optimum product available for use in line branching and classification.
High Reliability & Safety Features
Applies sulfur hexafluoride (SF6) gas insulation format with superior insulation and arc-suppression performance
Ensures 5,000 operation cycles
Prevents explosions from increases in gas pressure due to internal short-circuits by applying a gas release device
Switching accidents from high internal gas pressure prevented using pressure reduction indication and a locking mechanism
Category
Rating
Model [SSYE-PGS]
A4
M4
Rated voltage
25.8 kV
Rated frequency
60Hz
Rated current
400A
Load current switching
400A/20A(100%/5%)
Cable charging current
25A/7.5A (100%/30%)
Line charging current switching
1.5A
Loop current switching
400A
Rated short time current
12.5kA, rms
Rated short circuit
making currrent
32.5kA, peak
Power frequency withstand voltage
60kV
Lightning impulse withstand voltage
150kV
Rated operating voltage
AC 220V,
DC 24V
-
Operating type
Automatic
Manual
Applied specifications
Registration Technical Specifications of KEPCO (ES-5925-0003)