Standard: IEC60947-2
Polarity: Non-polarity
Type of trip: Thermo-magnetic
Rated current: 80A, 100A,125A
Rated voltage: 1P(300VDC), 2P(600VDC), 3P(900VDC), 4P(1200VDC)
Number of poles: 1P,2P,3P,4P
Rated short-circuit breaking capacity: 6kA
Tripping curve: B(4In±20%), C(8In±20%), K(10In±20%)
Connection: According to the wiring diagram
Advanced Protection for High-Power DC Networks
EKM3-125DC sets a new standard for DC circuit protection, bridging the gap between standard MCBs and Molded Case Circuit Breakers (MCCBs). With a frame size designed to handle currents up to 125A, it provides reliable overload and short-circuit protection for systems operating up to 1200V DC.
Critical Safety for Energy Storage
In Battery Energy Storage Systems (BESS), current flows in two directions. Standard polarized breakers can fail catastrophically if current flows in the "wrong" direction. The EKM3-125DC’s non-polarity technology eliminates this risk, ensuring safe arc extinguishing regardless of current direction.
Key Features & Advantages
Non-Polarity Design: Eliminates wiring errors and supports bidirectional current flow (Charge/Discharge), critical for Battery Storage Systems.
High Current Capacity: Available in 80A, 100A, and 125A ratings to support larger strings and loads.
High Voltage Rating: Supports operational voltages of 300V, 600V, 900V, and up to 1200V DC (4 Poles).
Superior Arc Quenching: Features a 6kA breaking capacity (Icu) with advanced arc chute technology designed for high DC voltages.
IEC Compliance: Fully certified to IEC/EN 60947-2 standards for industrial reliability.
Wide Operating Range: Performs reliably in extreme temperatures from -25°C to +55°C (operating) and handles storage up to +70°C.
Ease of Installation: DIN-rail mountable with a wider 27mm pole width for better heat dissipation compared to standard MCBs.
| Model | EKM3-125DC | ||||
| Standard | IEC/EN 60947-2 | ||||
| Protection | Overcurrent and short circuit | ||||
| Type of trip | Thermo-magnetic | ||||
| No. of poles | 1P | 2P | 3P | 4P | |
| Rated voltage (Ue) | 300V | 600V | 900V | 1200V | |
| Rated currents (In) | 80,100,125A | ||||
| Rated insulation voltage (Ui) | 1200V | ||||
| Rated impulse withstand voltage (Uimp) (1.2/50μs) | 6kV | ||||
| Rated service short circuit breaking capacity (Ics) | 6kA | ||||
| Rated ultimate short circuit breaking capacity (Icu) | 6kA | ||||
| Thermal tripping characteristics | 1.05ln~1.3ln | ||||
| Instantaneous tripping characteristics | B: 4In±20%, C: 8In±20%, K: 10In±20% | ||||
| Electrical life | Actual Value | ＞1,000 Cycles | |||
| Standard Value | 200 Cycles | ||||
| Mechanical life | Actual Value | ＞10,000 Cycles | |||
| Standard Value | 9700 Cycles | ||||
| Contact position indicator | OFF(green), ON(red) | ||||
| Overvoltage category | 3 | ||||
| Pollution degree | 3 | ||||
| Ingress protection | IP40, Wiring port IP20 | ||||
| Resistance to humidity and heat | Class 2 | ||||
| Reference temperature | -30℃ | ||||
| Operating ambient temperature (with daily average≤35°C) | -25°C ~ +55°C | ||||
| Storage temperature | -30°C ~ +70°C | ||||
| Terminal connection type | Cable | ||||
| Max. terminal size for cable | 50mm² | ||||
| Max. tightening torque | 3.5N.m | ||||
| Mounting type | Mounting on 35mm DIN rail | ||||
| Incoming method | According to the wiring diagram | ||||
GET A QUOTE
