Product Overview
This circuit breaker is suitable for AC 50Hz power systems with rated voltage up to 400V and rated current from 100A to 630A. It is used to distribute electrical energy and protect lines and power equipment from overload, short circuit, undervoltage, overvoltage, and phase loss faults. It can also be used to control infrequent operation of motors.
This product features current, voltage, power, and electrical quantity measurement; an RS-485 interface; a power line carrier module; Bluetooth wireless communication; and an HPLC pluggable module interface. The product complies with DL/T645 and DL/T-698.45 communication protocols, enabling remote signaling, remote measurement, remote adjustment, and remote tripping functions. It has linkage protection functions and temperature monitoring protection for incoming and outgoing terminals. The controller is hot-swappable, allowing for direct removal of the controller module for maintenance or replacement without disassembling the switch while the circuit is energized. Removing the controller does not affect the normal operation of the switch, ensuring the normal functioning of the three-stage protection.
Complies with the following standard: GB/T14048.2 <>
Main Technical Parameters
| Product Model | QKM□E-250 | QKM□E-400 | QKM□E-630 |
|---|---|---|---|
| Frame Size Rated Current Inm (A) | 250A | 400A | 630A |
| Applicable Poles | 3P | 3P | 3P |
| Rated Operating Voltage Ue (V) | AC400 / 50Hz | AC400 / 50Hz | AC400 / 50Hz |
| Rated Insulation Voltage Ui (V) | 1000 | 1000 | 1000 |
| Rated Impulse Withstand Voltage Uimp (kV) | 8 | 12 | 12 |
| Rated Ultimate Short-Circuit Breaking Capacity Icu (kA) | L: 20 S: 35 M: 50 H: 85 | L: 25 S: 35 M: 65 H: 100 | L: 35 S: 50 M: 65 H: 100 |
| Rated Service Short-Circuit Breaking Capacity Ics (kA) | L: 15 S: 35 M: 35 H: 70 | L: 20 S: 35 M: 50 H: 75 | L: 25 S: 35 M: 50 H: 70 |
| Rated Short-Time Withstand Current Icw (kA / 1s) | 5 | 10 | 10 |
| Arc Distance (Upper / Lower) mm | 50 / 0 | 100 / 0 | 100 / 0 |
| Rated Current In (A) | 100A–250A Adjustable | 160A–400A Adjustable | — |
| Overload Delay Time Factor (s) | 3 – 18 Adjustable | 3 – 18 Adjustable | 3 – 18 Adjustable |
| Short-Time Delay Multiple (×In) | 2 – 10 Adjustable | 2 – 10 Adjustable | 2 – 10 Adjustable |
| Short-Time Delay Time (ms) | 30 – 600 Continuously Adjustable | 30 – 600 Continuously Adjustable | 30 – 600 Continuously Adjustable |
| Instantaneous Trip Multiple (×In) | 4 – 12 Adjustable | 4 – 12 Adjustable | 4 – 12 Adjustable |
| Overvoltage Trip Value (V) | Default 275 ±1% (User Adjustable) | Default 275 ±1% (User Adjustable) | Default 275 ±1% (User Adjustable) |
| Undervoltage Trip Value (V) | Default 165 ±1% (User Adjustable) | Default 165 ±1% (User Adjustable) | Default 165 ±1% (User Adjustable) |
| Phase-Loss Trip Value (V) | Default 120 ±1% (User Adjustable) | Default 120 ±1% (User Adjustable) | Default 120 ±1% (User Adjustable) |
| Product Usage Category | Class A | Class B | Class B |