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NEC 2026 Panel Level Rapid Shutdown Install Guide | SUNTREE
NEC 2026 maintains and refines the module‑level rapid shutdown requirement: conductors outside the array boundary must drop to 30 V or less within 30 seconds, while inside the boundary,
• The circuit breaker has a beautiful appearance,compact size, and high breaking capacity.
•The product has non-polarity for current, providing reliable protection for both forward and reverse connections.
•It can operate reliably within a temperature range of -40°C to +70°C without derating at +50°C.
•Zero arc exposure: Equipped with an arc extinguishing cover and three layers of free metal partition plates, preventing secondary faults caused by arc spraying during breaking
•It has a single-phase DC1500V grounding breaking capacity of 10kA.
| Model | SM8-400HPV/2P 1500 | |||
| Frame Rated Current(A) | 400 | |||
| Rated Operating Current (In) | 200、225、250、315、350、400 | |||
| Numbers of poles | 2 | |||
| Rated Operational Voltage (Ue) | DC250V/DC500V | DC750V/DC1000V | DC1000V/DC1500V | |
| Rated Insulation Voltage (Ui) | 1500 | |||
| Rated Impulse Withstand Voltage (Uimp) | 12kV | |||
| Rated Service Short-Circuit Breaking Capacity (Ics) | 100%Icu | 100%Icu | 100%Icu | |
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | 70 | 40 | 20 | |
| Mechanical Life | Actual Average Value | 15000Times | ||
| Standard Specified Value | 4000Times | |||
| Electrical life | Actual Average Value | 1000Times | ||
| Standard Specified Value | 1000Times | |||
| Isolation Characteristics | YES | |||
| Standard | According to IEC60947-2 and GB/T14048.2-2020 | |||
| Release type | Thermal magnetic type (thermal magnetic non-adjustable)TMD Fixed | |||
| Pollution Degree | 2 | |||
| Protection Degrees | IP20 | |||
| Operational environment temperature | -40℃~+70℃ | |||
| Accessories | Internal Accessories: Shunt release, undervoltage release, auxiliary, alarm, auxiliary-alarm | |||
| Warranty Period | 18 months | |||
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