PGGLA Series Pluggable Lightning Arresters
| Brand | ROCKWILL |
| Model NO. | PGGLA Series Pluggable Lightning Arresters |
| Rated voltage | 20kV |
| Series | PGGLA Series |
Overview
Shielded plug-in surge arresters are suitable for C-GIS switchgear, gas-insulated ring-main units, and oil-immersed transformer protection in power systems up to 35kV. The external design uses a fully shielded metal housing, while the internal components utilize imported liquid silicone rubber material.
Features
Touch-safe and easy to install
The anti-electric shock enclosure and double-layer insulation design measures ensure touch safety, and the simple plug-and-play operation is convenient and quick.
Excellent Insulation Performance
High-performance insulation materials are adopted, and through reasonable layout and sealing measures, the overall insulation performance of the lightning arrester is ensured to be reliable.
Non-flammable and Self-extinguishing Properties
When exposed to external factors such as fire sources, the material will not continue to burn or spread the fire, but will extinguish itself within a certain period of time.
Control and Shielding of Electric Field Intensity
Through reasonable layout and shielding measures, the impact of electric field intensity on equipment and systems is reduced.
Technology parameters
Project |
Value |
||
rated voltage（AC） |
10kV |
20kV |
35kV |
Partial Discharge（pc） |
≤10 |
||
Partial Discharge Qrs（C） |
≥0.3 |
||
Rated Thermal Charge Transfer Qth（C） |
≥0.7 |
||
High Current Impulse Withstand（kA） |
65 |
||
-
KGC-1189Desktop Dissolved Gas Analysis Analyzer
-
750kV Series Porcelain-Housed Metal Oxide Surge Arreste
-
1000kV Series Porcelain-Housed Metal Oxide Surge Arresters
-
6 - 220kV Post - type Composite - Housed Metal Oxide Surge Arresters
-
330 - 1000kV Composite - Housed Metal Oxide Surge Arresters
-
35 - 220kV Suspended Composite - Housed Metal Oxide Surge Arresters
-
110 - 500kV Composite-Housed Line Surge Arresters
-
Tank-type Metal Oxide Surge Arresters for GIS
-
±500～±1100kV DC Metal Oxide Surge Arresters
-
Metal Oxide Surge Arresters for Series Compensation Capacitors
-
Design Solution of 24kV Dry Air Insulated Ring Main UnitThe combination of Solid Insulation Assist + Dry Air Insulation represents the development direction for 24kV RMUs. By balancing insulation requirements with compactness and employing solid auxiliary insulation, insulation tests can be passed without significantly increasing phase-to-phase and phase-to-ground dimensions. Encapsulating the pole column solidifies the insulation for the vacuum interrupter and its connecting conductors.Maintaining the 24kV outgoing busbar phase spacing at 110mm,16/08-2025 -
Optimization Design Scheme for the 12kV Air-Insulated Ring Main Unit Isolating Gap to Reduce Breakdown Discharge ProbabilityWith the rapid development of the power industry, the ecological concept of low-carbon, energy-saving, and environmental protection has been deeply integrated into the design and manufacturing of power supply and distribution electrical products. The Ring Main Unit (RMU) is a key electrical device in distribution networks. Safety, environmental protection, operational reliability, energy efficiency, and economy are inevitable trends in its development. Traditional RMUs are primarily represented16/08-2025 -
Analysis of Common Problems in 10kV Gas-Insulated Ring Main Units (RMUs)Introduction:10kV gas-insulated RMUs are widely used due to their numerous advantages, such as being fully enclosed, possessing high insulation performance, requiring no maintenance, having a compact size, and offering flexible and convenient installation. At this stage, they have gradually become a critical node in urban distribution network ring-main power supply and play a significant role in the power distribution system. Problems within gas-insulated RMUs can severely impact the entire di16/08-2025 -
SF6-Free Solution for Air-Insulated/Eco-friendly Gas Ring Main UnitsⅠ. Technical Bottlenecks of SF₆ SubstitutionInsulation Medium Performance Gapo Dried Air/N₂ insulation strength is only 1/3 of SF₆, requiring expansion of contact gap from 60mm to ≥150mm.o Conventional spring mechanisms lack energy to drive rapid closure of large gaps, easily causing contact ablation due to pre-strike.o Synthetic gases (e.g., C4+CO₂) decompose under arcing, leading to irreversible insulation degradation.Mechanical Structural Limitationso National Grid standardization fix16/08-2025 -
Implementation Scheme for Installing Lightning Arresters or Voltage Transformers in Gas-Insulated Ring Main UnitsAccording to insulation type, ring main units (RMUs) can be categorized as gas-insulated or air-insulated. The former installs primary circuit components in a sealed metal enclosure filled with low-pressure gas (primarily SF₆ or mixed gases) as the insulating medium, using cable terminals for incoming and outgoing lines. Due to superior insulation, compact size, and modular design, they are widely used in 10kV outdoor distribution substations and prefabricated transformer stations. However, thei16/08-2025 -
Pressure Relief Safety Solution for Gas-Insulated Ring Main UnitsⅠ. Problem ContextAs a core component in urban power distribution networks, ring main units (RMUs) are widely used in residential areas, factories, and public buildings due to their compact structure, low cost, and high reliability. However, internal equipment failures or arc faults may generate high-temperature, high-pressure gas, leading to cabinet explosions that endanger personnel and equipment. While traditional sealed designs maintain insulation integrity, they fail to rapidly release sud16/08-2025
