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Complete Technical Parameters of Siemens 3WL1116/3WL1216 1600A ETU45B-G-LCD-3P
The parameters cover dimensions including basic electrical characteristics, breaking capacity, trip unit, mechanical & environmental performance, communication and installation, facilitating engineering selection and system matching.
- Basic Electrical Parameters
| Parameter Item | Specification Value | Remarks |
| Product Series | Siemens SENTRON 3WL | Air Circuit Breaker (ACB) |
| Frame Size | 3WL1116 (Frame I) / 3WL1216 (Frame II) | 3WL1116: Standard breaking capacity; 3WL1216: High breaking capacity |
| Rated Current (In) | 1600A | Frame size current 1600A, setting range 0.4–1In |
| Pole Number | 3P | Three-pole, 3-phase main circuit |
| Rated Operational Voltage (Ue) | 690V AC | 50/60Hz, compliant with IEC 60947-2 |
| Rated Insulation Voltage (Ui) | 1000V AC | Benchmark value for insulation withstand capability |
| Rated Impulse Withstand Voltage (Uimp) | 12kV | Compliant with IEC 60947-1 |
| Rated Short-time Withstand Current (Icw) | Frame I: 66kA/1s; Frame II: 80kA/1s | Ensures short-time thermal stability at 500V |
| Breaking Capacity (Icu) | Frame I: 55/66kA; Frame II: 80/100kA | Ultimate breaking capacity at 500V; Frame II offers higher breaking capacity |
- Parameters of ETU45B-G-LCD Electronic Trip Unit
| Function Module | Specification Value | Description |
| Protection Type | LSIG (L: Overload/Long-time Delay; S: Short-circuit/Short-time Delay; I: Instantaneous Short-circuit; G: Ground Fault) | Complete power distribution protection configuration |
| Overload Protection (L) | Characteristic Curve: I²t/I⁴t selectable; Setting Range: 0.4–1In | I⁴t characteristic improves selectivity with downstream devices |
| Short-time Delay Short-circuit Protection (S) | Setting Current: 2–10In; Time Delay: 0.1–0.4s | Adjustable inverse/definite time delay to prevent selective tripping |
| Instantaneous Short-circuit Protection (I) | Setting Current: 2–10In | Rapid short-circuit current interruption without time delay |
| Ground Fault Protection (G) | Setting Current: 0.2–0.8In; Time Delay: 0.1–2s | Detects ground faults to avoid equipment damage |
| Display & Operation | LCD screen, rotary coding switch | Real-time display of current, trip cause and fault records |
| Reset Method | Manual/Auto selectable | Quick power supply recovery after fault clearance |
III. Mechanical & Environmental Parameters
| Parameter Item | Specification Value | Remarks |
| Mechanical Life | 150,000 operations | No-load operation, compliant with IEC 60947-2 |
| Electrical Life | 10,000 operations (AC-3, at rated current) | On-load breaking life, related to operating frequency |
| Operating Mechanism | Spring-loaded energy storage type (manual/electric optional) | Electric mechanism suitable for remote control |
| Auxiliary Contacts | Standard: 2NO+2NC, expandable to 4NO+4NC | Status feedback and control circuit interlocking |
| Ambient Temperature | -25℃~+70℃ (operating); -40℃~+85℃ (storage) | Wide temperature range for industrial applications |
| Protection Class | IP30 (body); IP40 (with protective cover) | Prevents solid foreign object intrusion |
| Altitude | ≤2000m (derating required above 2000m) | Rated current derating by 1% for every 100m altitude increase |
| Mounting Method | Fixed type/Drawout type | Drawout type enables maintenance without power outage |
- Communication & Measurement Parameters
| Function | Specification | Interface/Protocol |
| Communication Module | COM15 (PROFIBUS DP) / COM16 (MODBUS RTU) | Optional, supports data upload to monitoring system |
| Measurement Accuracy | Current: ±1%; Voltage: ±1.5%; Power: ±2% | Compatible with Plus measurement function for energy management |
| Data Logging | 100 fault records (trip type, time, current value) | Fault tracing and system diagnosis |
| Remote Control | Supports remote opening/closing and parameter setting | Realized by electric mechanism + communication module |
- Installation & Dimension Parameters
| Mounting Type | Width (W) | Height (H) | Depth (D) | Weight |
| 3WL1116 Fixed Type | 320mm | 434mm | 291mm | Approx. 45kg |
| 3WL1116 Drawout Type | 320mm | 434mm | Approx. 450mm | Approx. 55kg |
| 3WL1216 Fixed Type | 460mm | 434mm | 291mm | Approx. 56kg |
| 3WL1216 Drawout Type | 460mm | 434mm | Approx. 450mm | Approx. 65kg |
| Mounting Mode | 35mm DIN rail/screw mounting | Frame I width: 320mm; Frame II width: 460mm; Unified height: 434mm |
- Key Selection & Application Tips
- Breaking Capacity Matching: Select frame size based on the system’s maximum short-circuit current. Frame I is suitable for scenarios ≤66kA, while Frame II is for ≤100kA. A 20% margin is recommended.
- Trip Unit Setting: Enable LSIG protection for motor loads, with the ground fault setting recommended at 0.3–0.5In. LSI protection is sufficient for power distribution loads.
- Communication Compatibility: Select COM15/COM16 module for remote monitoring, ensuring protocol compatibility with PLC/SCADA systems (PROFIBUS/MODBUS).
- Installation Space: The drawout type occupies approximately 160mm more depth than the fixed type. Reserve sufficient operation and maintenance space during cabinet design.
- Replacement & Upgrade: The 3WL series has been upgraded to the 3WA series (e.g., 3WA1116-3EG45-4GA4), featuring compatible dimensions and protection functions, plus added Ethernet communication and intelligent diagnosis.
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VII. Compliance & Certification
Compliant Standards: GB 14048.2, IEC 60947-2, EN 60947-2
Certifications: CE, UL, CSA (for some models), meeting compliance requirements for global industrial applications
