The NOA and NOV protectors are compact single-phase protection devices for circuits that require adjustable voltage protection, current protection, measurement display and delayed automatic reconnection. The two product pages share the same physical image set and have closely related protection functions.
Model Scope
| Model | Nominal data shown | Main protection functions |
|---|
| NOA-40 | 220V, 40A | Under-voltage, over-voltage and over-current protection with voltage and current display |
| NOV-40 | 220V, 63A | Under-voltage, over-voltage and over-current protection with voltage and current display |
Adjustable Protection Settings
| Item | Range |
|---|
| Under-voltage protection | 210V to 140V adjustable |
| Over-voltage protection | 230V to 300V adjustable |
| Over-current protection | 1A to 40A/63A adjustable, according to model rating |
| Reconnect time | 1s to 300s, with 5s default shown in the product data |
Display and Use
- Integrated voltage meter for real-time voltage indication.
- Integrated ammeter for load current indication.
- Automatic reconnection after the configured delay when circuit conditions return to the allowed range.
- Suitable for compact distribution-board protection where voltage and current conditions need to be visible at the device.
