Reliable Protection & Fault Isolation for High-Voltage Systems
Ensuring the continuous operation of your power grid, our AD-1 Series Disconnector is designed to automatically isolate a failed surge arrester from the system. This prevents permanent line faults and provides a clear visual indication for maintenance teams to replace the damaged unit.
Key Features & Benefits
Rapid Fault Isolation: Extremely fast response time under power frequency faults to protect the grid stability.
High Impulse Withstand: Engineered to withstand high-energy square wave and lightning impulses without nuisance tripping.
Visual Fault Indication: Once triggered, the disconnector provides a visible physical gap or drop-out, making inspection effortless.
Maintenance Free: Robust design resistant to environmental aging, ensuring long-term reliability in outdoor conditions.
Technical Specifications
Based on the provided test data, the AD-1 series meets the following performance standards:
Understanding the Parameters (Buyer’s Guide)
To ensure you select the correct disconnector for your application, please consider the following:
Operation Characteristics:
The inverse time-current characteristic shown (0.5s at 20A vs 0.02s at 800A) ensures that the system is cleared faster as the fault severity increases.
Impulse Non-Operation (Withstand):
A critical factor for reliability. Our disconnector can handle a 100kA (4/10 $\mu s$) lightning impulse without operating. This prevents “nuisance tripping” during normal lightning activity where the arrester is still functional.
Application Environment:
Suitable for use with Metal Oxide Surge Arresters (MOA) in distribution and transmission lines (typically 10kV to 220kV systems).
Installation & Maintenance
Connection: Usually connected in series at the bottom (earth side) of the surge arrester.
Flexible Lead: Ensure the flexible grounding lead is long enough to allow for the disconnector to “drop” or move significantly upon operation to create an air gap.
Replacement: Once the disconnector has operated (tripped), both the disconnector and the associated surge arrester must be inspected and typically replaced.
Ordering Information
To provide an accurate quote, please specify:
Rated Voltage of the associated Surge Arrester.
Required Lightning Impulse Withstand (e.g., 65kA or 100kA).
Mounting bracket requirements (NEMA type or custom).
Contact our engineering team today for technical support or bulk pricing.
