BHD Series SPD Disconnector | Shihlin Electric Surge Protection
BHD Series SPD Disconnector safely isolates surge protective devices during failure and maintenance. High surge withstand capability prevents nuisance tripping in industrial applications.
SPD Disconnector
BHD
BHD Series SPD Disconnector
Breaking Capacity
BHD Series SPD Disconnector
A dedicated SPD disconnector designed to safely isolate the SPD during failure and maintenance, and to disconnect leakage current caused by SPD deterioration—while withstanding normal surge discharge to reduce nuisance tripping.
Product Overview
The BHD Series SPD Disconnector isolates the SPD from the system during SPD failure and maintenance work. It includes a trip function to detect and disconnect leakage current caused by SPD deterioration (e.g., varistor burnout). With high surge withstand capability, BHD helps avoid unintended operation during normal surge discharge events.
Key Benefits
The SPD disconnector is used to safely isolate the SPD during failure and maintenance.
It can disconnect leakage current caused by SPD deterioration.
High surge resistance helps prevent nuisance tripping of the disconnector.
Model Code (Simplified)
Model example: BHD 80 U 4
Technical Specifications
| Item | BHD20R | BHD20U | BHD40R | BHD40U | BHD80R | BHD80U | BHD120R | BHD120U | BHD250R | BHD250U |
|---|---|---|---|---|---|---|---|---|---|---|
| Rated Current In (A) | 10 | 10 | 20 | 20 | 40 | 40 | 60 | 60 | 80 | 80 |
| Rated Operating Voltage Ue | AC 230/240 V (1P/2P), AC 230/400 V (3P/4P) | |||||||||
| Maximum Impulse Current Iimp (kA) | – | – | – | – | – | – | – | – | 25 | 25 |
| Maximum Discharge Current Imax (kA) | 20 | 20 | 40 | 40 | 80 | 80 | 120 | 120 | – | – |
| Rated Short-Circuit Breaking Capacity Icn (kA) | 65 | 100 | 65 | 100 | 65 | 100 | 65 | 100 | 65 | 100 |
| Number of Poles | 1P, 2P, 3P, 4P | |||||||||
| Minimum Time-Delay Tripping Current Id | 3 A ± 1 A | |||||||||
| Minimum Instantaneous Tripping Current Ii | 5 A | |||||||||
Operating Conditions
| Item | Requirement |
|---|---|
| Altitude | ≤ 2000 m |
| Ambient Temperature | -25°C to +60°C |
| Relative Humidity | 20% to 90% |
| Pollution Degree | Class 3 |
| Vibration | 10 Hz to 50 Hz, amplitude 1.5 mm |
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How can you ensure SPD isolation doesn't cause nuisance tripping in high-fault-level industrial systems?
The BHD Series SPD Disconnector delivers exceptional surge withstand capability (up to 120 kA, 8/20 μs) combined with intelligent leakage current detection, allowing safe SPD isolation without disrupting normal system operation. Shihlin Electric's 60+ years of OEM/ODM expertise ensures seamless integration with your power distribution designs. Request a technical consultation to optimize SPD protection for your manufacturing systems.
Shihlin Electric's BHD Series SPD Disconnector eliminates the risk of nuisance tripping during normal surge discharge events while ensuring personnel safety during SPD maintenance and replacement. With minimum time-delay tripping current of 3 A ± 1 A and instantaneous tripping at 5 A, the device provides precise fault detection and rapid isolation. The disconnector operates reliably in demanding conditions—from -25°C to +60°C ambient temperature and up to 2000 m altitude—making it ideal for industrial manufacturers, OEM/ODM partners, and electrical contractors seeking advanced surge protection solutions. Contact Shihlin Electric today to specify the optimal BHD Series configuration for your power distribution and factory automation requirements.