NEUTRONPower Distribution & New Energy
Technical knowledge library
Selection guidance for residual-current protection, surge protection, transfer switching and low-voltage protection coordination.
Showing 13–24 of 75 published guides.
Every guide remains available through the numbered topic pages and its own permanent article URL.
Protection / Selection guide
Meta description (177 chars): Understand the difference between an RCD, an RCCB and an RCBO, the residual current types AC/A/F/B, and how to choose the right protection for each circuit with NEUTRON devices.
Surge protection / Troubleshooting
Diagnose an SPD that trips an upstream breaker or RCD by checking end-of-life status, leakage current, backup protection, Uc, wiring and lead length.
Surge protection / Technical guide
Lightning arresters and low-voltage surge protective devices are different stages of a coordinated protection system. Compare waveform, energy class, location and voltage protection level before selecting a device.
Electrical Protection / Technical guide
The move to 1500 V is a response to project economics at the megawatt scale. A 1500 V array carries roughly the same power with two-thirds of the current of an equivalent 1000 V design, which shrinks conductor cross-sections, lowers resistive losses, and reduces the number of combiner boxes and inverters needed per hectare. As module currents and conversion efficiencies climb, the industry has pushed the standardized maximum system voltage upward to keep the levelized cost of energy falling. For equipment engineers, the change is not cosmetic: every component on the DC side must now be qualified for the higher insulation and transient environment.
Electrical Protection / Selection guide
A PV array is effectively a large, elevated conductor network spread across a field or rooftop. Three mechanisms inject overvoltage into the DC side:
Protection / Selection guide
How zinc oxide MOVs clamp surges, the parameters that matter (Uc, In, Imax, Up), why varistors age, and how to specify thermally protected SPD modules to IEC 61643-11.
Protection / Selection guide
RCBO vs AFDD compared: earth fault and overcurrent protection versus series and parallel arc detection, applicable standards, and when to fit both. (147 characters)
Protection / Selection guide
Type 1 takes the direct lightning impulse at the service entrance; Type 2 protects downstream branches. The difference is waveform, placement and let-through — and coordination decides which you specify.
Protection / Selection guide
Meta description (148 chars): Why smooth DC residual current blinds Type A RCDs, what the 6 mA rule in IEC 61851-1 requires, and how to specify Type B protection for EV chargers.
Protection / Selection guide
RCCB types AC, A, F and B differ by the smooth or pulsing DC fault they catch: AC for pure AC, A for mixed, F for frequency-drive, B for universal. Pick by the load waveform, not the name.
Protection / Selection guide
A surge protective device does not expire on a calendar. It wears out by **absorbing energy**, and the rate depends entirely on how many transients its position sees. In a benign indoor environment a Type 2 device may hold its rating for eight to ten
Protection / Selection guide
RCBO vs RCCB compared: standards, module width, nuisance tripping, discrimination and lifetime cost. When per-circuit RCBOs beat a grouped RCCB.