Internet of Things (IoT) Enabled Smart Circuit Breaker (here in after referred to as the “circuit breaker”) is designed for protective applications in power distribution systems with AC 50Hz, a rated operational current up to 800A, a rated insulation voltage of 1000V, and a rated operational voltage of AC 400V. The circuit breaker provides comprehensive protection functions, including long-time delay, short-time delay for short circuits, instantaneous tripping, residual current protection, over/under voltage protection, and phase failure protection, ensuring the safety of electrical circuits and power supply equipment.
It is capable of feeding back data such as current, voltage, power, energy consumption, and terminal temperature to terminal devices within the distribution area with meter-level accuracy, enabling effective load monitoring and supervision, reducing operational and maintenance costs of the power grid, and providing essential data for future smart distribution area systems. Additionally, the circuit breaker supports automatic identification of topology relationships in distribution networks and features power line carrier communication capabilities.
The product complies with the standards: GB/T 14048.2 and DL/T 20… Communication Protocol for Residual Current Protective Devices.
Main Technical Parameters
| Model | Technical Parameter Description | 125A | 250A | 400A | 630A | 800A |
|---|---|---|---|---|---|---|
| Frame Size Rated Current Inm (A) | 125 | 250 | 400 | 630 | 800 | |
| Applicable Number of Poles | 3P+N | 3P+N | 3P+N | 3P+N | 3P+N | |
| Rated Operational Voltage Ue (V) | AC400 / 50Hz | AC400 / 50Hz | AC400 / 50Hz | AC400 / 50Hz | AC400 / 50Hz | |
| Rated Current In (A) | Adjustable within 0.4–1.0Inm | 50–125 | 100–250 | 160–400 | 252–630 | 320–800 |
| Rated Insulation Voltage Ui (V) | 1000 | 1000 | 1000 | 1000 | 1000 | |
| Rated Impulse Withstand Voltage Uimp (V) | 8000 | 8000 | 8000 | 8000 | 8000 | |
| Rated Ultimate Short-circuit Breaking Capacity Icu (kA) | Standard/High Performance versions indicated in parentheses | 36(M)/50(H) | 35(S)/50/65(M) | 35(S)/65/85(M) | 65/85(M) | 50(S)/65/85(M) |
| Rated Service Short-circuit Breaking Capacity Ics (kA) | Standard/High Performance versions indicated in parentheses | 25(M)/35(H) | 35(S)/35/50(M) | 35(S)/45/55(M) | 45/55(M) | 50(S)/45/65(M) |
| Rated Short-time Withstand Current Icw (kA/s) | 1.25/1 | 3/0.5 | 5/0.5 | 8/0.5 | 10/1 | |
| Overload Time-delay Coefficient (s) | Adjustable | 3–18 | 3–18 | 3–18 | 3–18 | 3–18 |
| Short-circuit Short-time Delay Multiple (xIn) | Adjustable | 2–10 | 2–10 | 2–10 | 2–10 | 2–10 |
| Short-circuit Short-time Delay Time (ms) | Continuously adjustable | 100–400 | 100–400 | 100–400 | 100–400 | 100–400 |
| Short-circuit Instantaneous Multiple (xIn) | Adjustable | 4–12 | 4–12 | 4–12 | 4–12 | 4–12 |
| Overvoltage Trip Value (V) | Default (User adjustable) | 275 ±1% | 275 ±1% | 275 ±1% | 275 ±1% | 275 ±1% |
| Undervoltage Trip Value (V) | Default (User adjustable) | 165 ±1% | 165 ±1% | 165 ±1% | 165 ±1% | 165 ±1% |
Note:
- P/N in Model Variants: (S) = Standard, (M) = Medium, (H) = High performance level.
- In: Rated Current. Inm: Frame Size Rated Current.
- User-adjustable parameters are indicated with ranges in the description column and the applicable range is merged under the relevant frame sizes.
- Values for parameters such as Overvoltage and Undervoltage trip settings are the defaults; the user can adjust them within the product’s capability.