IoT-enabled Intelligent Circuit Breaker (hereinafter referred to as the circuit breaker) is suitable for distribution protection with AC 50Hz, rated operating current up to 800A, rated insulation voltage 1000V, and rated operating voltage AC400V.
The circuit breaker provides long-time delay, short-time delay, instantaneous, residual current, over/undervoltage, and phase loss protection functions to protect lines and power equipment. It can feed back information such as current, voltage, power, energy, and terminal temperature of the product to the terminal equipment in the distribution area with meter-level accuracy, which is used for detection and monitoring of the load side, reduces the operation and maintenance cost of the power grid, and provides necessary data for future intelligent distribution area systems. The circuit breaker also has the functions of automatic identification of the topological relationship of the distribution network in the area and power line carrier communication.
This product complies with the standards: GB/T 14048.2, DL/T 20.., and the communication protocol for residual current protectors.
| Item | QKM3L-125 | QKM3L-160 / QKM3L-250 | QKM3L-400 | QKM3L-630 | QKM3L-800 | ||||||||||||
| Rated Current In (A) | Adjustable 50A–125A | Adjustable 63A–160A / 100A–250A | Adjustable 160A–400A | Adjustable 260A–630A | Adjustable 260A–800A | ||||||||||||
| Rated Impulse Withstand Voltage Uimp (kV) | 8 | 8 | 8 | 8 | 8 | ||||||||||||
| Rated Insulation Voltage Ui (V) | 1000 | 1000 | 1000 | 1000 | 1000 | ||||||||||||
| Rated Operating Voltage Ue (V) | AC400 | AC400 | AC400 | AC400 | AC400 | ||||||||||||
| Pole Number | 3P+N | 3P+N | 3P+N | 3P+N | 3P+N | ||||||||||||
| Selectivity Class | A | A | B | B | B | B | |||||||||||
| Breaking Capacity Rating | / | S | / | M | H | L | S | / | M | H | / | M | S | / | M | H | |
| Rated Ultimate Short-circuit Breaking Capacity Icu AC400V (kA) | AC 400V | 50 | 35 | 50 | 65 | 85 | 20 | 35 | 65 | 85 | 85 | 65 | 85 | 50 | 65 | 85 | 85 |
| Rated Service Short-circuit Breaking Capacity Ics AC400V (kA) | AC 400V | 35 | 35 | 35 | 50 | 70 | 15 | 35 | 45 | 55 | 70 | 45 | 55 | 50 | 45 | 65 | 70 |
| Rated Short-time Withstand Current Icw | 1.25kA/1s | 3kA/0.5s | 10kA/1s | 5kA/0.5s | 8kA/0.5s | 10kA/1s | |||||||||||
| Rated Residual Current IΔn (A) | Adjustable 30mA–1000mA | Adjustable 30mA–1000mA | Adjustable 30mA–1000mA | Adjustable 30mA–1000mA | Adjustable 30mA–1000mA | ||||||||||||
| Trip Time (Non-operating) | 0.065s, 0.1s, 0.2s | 0.065s, 0.1s, 0.2s | 0.065s, 0.1s, 0.2s | 0.065s, 0.1s, 0.2s | 0.065s, 0.1s, 0.2s | ||||||||||||
| Rated Residual Current Make-and-break Capacity ΔIcm | 25%Icu | 25%Icu | 25%Icu | 25%Icu | 25%Icu | ||||||||||||
| Mechanical Endurance (times) | 10000 | 10000 | 5000 | 5000 | 5000 | ||||||||||||
| Electrical Endurance (times) | 2000 | 2000 | 1200 | 1200 | 1200 | ||||||||||||
| Overall Dimensions (L×W×H, mm) | 220×122×135 | 240×142×138 | 336×198×182 | 336×198×182 | 355×240×191 | ||||||||||||
| Main Technical Parameters (English Professional Version) | ||||||
| Item | Unit | QKM3L-125A | QKM3L-250A | QKM3L-400A | QKM3L-630A | QKM3L-800A |
| Model | – | QKM3L-125A | QKM3L-250A | QKM3L-400A | QKM3L-630A | QKM3L-800A |
| Frame Grade Rated Current (Inm) | A | 125 | 250 | 400 | 630 | 800 |
| Applicable Pole Number | – | 3P+N | ||||
| Rated Working Voltage (Ue) | V/Hz | AC400V, 50Hz | ||||
| Rated Current (In) | A | 0.4–1.0×Inm (continuously adjustable) | ||||
| Rated Insulation Voltage (Ui) | V | 1000 | ||||
| Rated Impulse Withstand Voltage (Uimp) | V | 8000 | ||||
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | kA | 36 (M); 50 (H) | 35 (S); 50; 65 (M) | 35 (S); 65; 85 (M) | 65; 85 (M) | 50 (S); 65; 85 (M) |
| Rated Operational Short-Circuit Breaking Capacity (Ics) | kA | 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 Delay Time Coefficient | s | 3–18 (adjustable) | ||||
| Short-Circuit Short-Time Delay Multiple (×In) | – | 2–10 (adjustable) | ||||
| Short-Circuit Short-Time Delay Time | ms | 100–400 (continuously adjustable) | ||||
| Short-Circuit Instantaneous Multiple (×In) | – | 4–12 (adjustable) | ||||
| Overvoltage Trip Value | V | Default: 275±1% (user configurable) | ||||
| Undervoltage Trip Value | V | Default: 165±1% (user configurable) | ||||
| Phase Loss Trip Value | V | Default: 120±1% (user configurable) | ||||
| Rated Residual Operating Current (IΔn) | mA | 30–1000mA (8 sets customizable) | ||||
| Rated Residual Non-Operating Current (IΔno) | mA | IΔno = 70% × IΔn | ||||
| Limit Non-Drive Time | s | 0.06 / 0.1 / 0.2 | ||||
| Residual Current Operating Characteristic | – | AC Type | ||||
| Rated Residual Short-Circuit Making & Breaking Capacity (IΔm) | kA | IΔm = 25% × Icu | ||||
| Utilization Category | – | Class A | Class A | Class B | Class B | Class B |