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- Core Mounting Dimensions (Unit: mm)
The following dimensions are categorized by frame size (Frame I/Frame II) and mounting method (Fixed Type/Drawout Type), with weight references included for cabinet design and load-bearing calculation:
| Frame Size | Model Series | Mounting Method | Width (여) | Height (H) | Depth (D) | 무게 (kg) |
| Frame I | 3WL1116 | Fixed Type | 320 | 434 | 291 | Approx. 45 |
| Frame I | 3WL1116 | Drawout Type | 320 | 434 | Approx. 450 | Approx. 55 |
| Frame II | 3WL1216 | Fixed Type | 460 | 434 | 291 | Approx. 56 |
| Frame II | 3WL1216 | Drawout Type | 460 | 434 | Approx. 450 | Approx. 65 |
- Key Supplementary Instructions
- Dimension Consistency and Differences
Unified Height: The standard height of all 3WL series circuit breakers (Frame 0/I/II/III) is 434mm, which is the unified design standard of this series, facilitating the interchangeable installation of different frame sizes.
Depth Variation:
The basic depth of the fixed type is 291mm (universal for Frame I/II), excluding the protruding part of the operating mechanism.
The depth of the drawout type increases by approximately 160mm (thickness of the drawer base), with a total depth of about 450mm.
If equipped with an extended operating mechanism or other special accessories, the depth may increase further.
Impact of ETU45B-G-LCD: The type of electronic trip unit and display mode (LCD) have no significant impact on the overall dimensions, and only affect the layout of the front panel of the circuit breaker.
- Recommendations for Mounting Hole and Space Reservation
| Frame Size | Recommended Mounting Hole Dimension (W×H) | Spacing Between Adjacent Circuit Breakers | Space Reservation for Top/Bottom |
| Frame I | 310mm × 424mm | ≥50mm (for heat dissipation) | ≥100mm (for wiring) |
| Frame II | 450mm × 424mm | ≥50mm (for heat dissipation) | ≥100mm (for wiring) |
- Explanation of Mounting Methods
Fixed Type: Small space occupation and low cost, suitable for occasions where frequent maintenance is not required.
Drawout Type: Facilitates maintenance and replacement, ideal for key circuits. However, it occupies more space, and attention should be paid to the installation space of the drawer base and the operating distance (≥600mm is recommended).
- Dimension Compatibility for Replacement and Upgrade
The Siemens 3WL series has been gradually upgraded to the 3WA series (예를 들어, 3WA1116-3EG45-4GA4), which retains exactly the same mounting dimensions (너비, height, depth) and can be directly replaced without cabinet modification.
III. Engineering Application Notes
- When designing the cabinet, consideration should be given to the operating space of the drawout circuit breaker to ensure that the drawer can be fully pulled out for maintenance.
- For fixed installation, cable connection space must be reserved, especially the bending radius requirements for vertical incoming/outgoing cables.
- For drawout circuit breakers weighing more than 50kg, it is recommended to design load-bearing reinforced structures for the cabinet.
- The installation environment must meet the requirements of protection class. The fixed type body has a protection class of IP30, which can be upgraded to IP40 with a protective cover installed.
