
( Brand: Schneider Electric ), ( Manufacturer Part Number: LC1D128Q7 )
The **Schneider Electric LC1D128Q7** is a high-performance, modular **Altivar ATV1200** drive designed for demanding industrial applications requiring precise control, energy efficiency, and robust reliability. Part of Schneider Electric s advanced **Altivar** series, this drive is engineered to deliver superior performance in motor control, making it an ideal solution for applications such as pumps, fans, compressors, conveyors, and other variable torque loads where smooth acceleration, deceleration, and speed regulation are critical. With a **1200V DC bus voltage** and a **128A current rating**, the LC1D128Q7 is well-suited for driving high-power motors up to **1,000 kW**, ensuring optimal efficiency even under heavy loads. Its **modular design** allows for easy integration into existing control systems, with flexible mounting options and a compact footprint that minimizes installation space while maximizing functionality.
At the heart of the LC1D128Q7 is **Schneider Electric s EcoStruxure** architecture, which integrates seamlessly with the company s **Unity Pro** software for intuitive configuration, monitoring, and diagnostics. This drive supports **vector control, field-oriented control (FOC), and open-loop control** modes, providing precise torque and speed regulation for enhanced process control. The **PWM (Pulse Width Modulation) inverter technology** ensures minimal harmonic distortion, reducing stress on motors and connected equipment while improving overall system efficiency. Additionally, the LC1D128Q7 incorporates **regenerative braking capabilities**, allowing for energy recovery and reducing peak demand charges in applications where motor deceleration generates excess energy.
Safety and reliability are prioritized in the design of the LC1D128Q7, featuring **IP20 protection** (with optional IP54 enclosure for harsh environments) and **overload protection** to safeguard against thermal and electrical faults. The drive includes **built-in diagnostics** that provide real-time feedback on motor and system health, enabling predictive maintenance and minimizing downtime. Its **wide input voltage range (380 480V AC, 50/60Hz)** ensures compatibility with global power standards, while **RS-485, Ethernet/IP, and Modbus** communication protocols facilitate seamless integration with PLCs, SCADA systems, and other industrial networks. The **user-friendly LCD display** and **keypad interface** allow for on-site parameter adjustments, while remote access via **Unity Pro** software enables centralized control and monitoring across multiple drives.
The LC1D128Q7 also excels in **energy savings**, with features such as **soft start/stop, ramp control, and energy optimization modes** that reduce power consumption without compromising performance. Its **high efficiency rating** (up to **97%**) minimizes wasted energy, contributing to lower operational costs and a reduced environmental footprint. Schneider Electric s commitment to **sustainability** is further reflected in the drive s **low electromagnetic interference (EMI)** and **compliance with international standards**, including **CE, UL, and IEC**, ensuring safe and reliable operation in diverse industrial settings. Whether deployed in manufacturing, HVAC systems, or renewable energy applications, the LC1D128Q7 delivers **unmatched precision, durability, and energy efficiency**, making it a cornerstone of modern industrial automation.
### **Pros and Cons of Buying Schneider Electric LC1D128Q7 (Square D QPX Series 120V 128A Circuit Breaker)**
The **Schneider Electric LC1D128Q7** is a **Square D QPX Series** 120V, 128A circuit breaker designed for residential and light commercial electrical panels. Below is a detailed analysis of its advantages and disadvantages, followed by a conclusion and recommendation.
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### **Pros**
1. **High Ampere Rating (128A)**
- Suitable for large residential loads, including electric heaters, electric vehicle (EV) chargers, and high-power appliances.
- Can handle significant electrical demands without frequent tripping.
2. **Square D QPX Series Reliability**
- Part of Schneider Electric s **QPX Series**, known for durability and consistent performance in North American electrical panels.
- Designed to meet **UL, CSA, and NEC** standards, ensuring safety and compliance.
3. **Easy Installation & Compatibility**
- Standard **NEMA 1/2 panel** mounting, making it easy to install in existing or new electrical panels.
- Works with **Schneider Electric Homeline, Square D, and other major panel brands** (with proper wiring and sizing).
4. **Adjustable Trip Settings (Optional)**
- Some variants in the QPX series allow for **adjustable trip curves**, which can be useful for applications requiring fine-tuned protection (e.g., motors, sensitive electronics).
- The **LC1D128Q7** itself is a **fixed-trip** breaker, but Schneider offers compatible **adjustable trip modules** if needed.
5. **Arc-Fault Protection (AFCI) Compatibility**
- Schneider s QPX series supports **AFCI (Arc-Fault Circuit Interrupter) protection**, which is required in many residential applications (e.g., bedrooms, living areas).
- Some models can be paired with **AFCI breakers** for enhanced safety.
6. **Long Lifespan & Low Maintenance**
- Made with **high-quality materials**, reducing the risk of premature failure.
- Minimal maintenance required beyond standard electrical checks.
7. **Good Brand Reputation**
- Schneider Electric (formerly Square D) is a **trusted name in electrical protection**, with a strong track record in the industry.
- Widely available through **electrical distributors, Amazon, and home improvement stores**.
8. **Cost-Effective for High Loads**
- While not the cheapest breaker on the market, its **128A rating justifies the cost** for high-demand applications where smaller breakers would trip frequently.
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### **Cons**
1. **Higher Upfront Cost Compared to Basic Breakers**
- More expensive than standard **15A 30A breakers**, making it a significant investment if only moderate loads are needed.
- Pricing can vary, but expect to pay **$100 $200 ** depending on retailer and availability.
2. **Fixed Trip Curve (Non-Adjustable)**
- The **LC1D128Q7** is a **standard trip breaker** (not adjustable), which may limit flexibility in specialized applications (e.g., motor loads requiring lower inrush protection).
- If adjustable trip settings are needed, additional modules may be required.
3. **Requires Proper Panel & Wiring Capacity**
- A **128A breaker** demands a **panel rated for at least 125A ** (preferably 200A for safety margin).
- **Wiring must be sized correctly** (e.g., **4/0 AWG copper or 2/0 AWG aluminum**) to handle the current without excessive voltage drop.
- Improper sizing can lead to **frequent tripping or fire hazards**.
4. **Limited Availability in Some Regions**
- While widely stocked in North America, availability may be **limited in international markets** unless purchased from a specialized electrical supplier.
- Some retailers may not carry it, requiring online ordering.
5. **Potential for Overloading if Misused**
- A **128A breaker is not a "catch-all" solution** it should only be used for **dedicated high-load circuits** (e.g., EV charging, subpanels, or major appliances).
- Using it for general branch circuits in a home could lead to **inefficient power distribution** and unnecessary cost.
6. **Installation Requires Electrical Knowledge**
- While the breaker itself is straightforward, **proper installation in a panel requires electrical expertise** to avoid shorts, improper connections, or voiding warranties.
- DIY installation is **not recommended** unless the installer is experienced.
7. **No Built-In GFCI Protection**
- Unlike some residential breakers, the **LC1D128Q7 does not include GFCI (Ground Fault Circuit Interrupter) protection**, which is required for **outdoor, bathroom, and kitchen circuits**.
- GFCI protection must be added via **separate GFCI breakers or outlets** if needed.
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### **Conclusion**
The **Schneider Electric LC1D128Q7** is a **high-quality, reliable 128A circuit breaker** best suited for **large residential loads, subpanels, or dedicated high-power circuits** (e.g., electric vehicle charging, electric heaters, or commercial applications). Its **durability, compliance with electrical codes, and compatibility with major panel brands** make it a strong choice for professionals and experienced DIYers.
However, its **higher cost, fixed trip settings, and requirement for proper panel and wiring capacity** mean it is **not ideal for general residential use** where smaller breakers (e.g., 30A 50A) would suffice. Additionally, **installation should be done by a licensed electrician** to ensure safety and compliance.
### **Recommendation**
- **Buy the LC1D128Q7 if:**- You need a **high-capacity breaker (128A) for a specific application** (e.g., EV charging, subpanel, or major appliance circuit).
- You are working with a **Schneider Electric or Square D panel** and require a **reliable, code-compliant breaker**.
- You have **proper panel and wiring capacity** (200A panel, correctly sized conductors).
- You are comfortable with **electrical installation** or hiring a professional.
- **Avoid the LC1D128Q7 if:**- You only need a **standard residential breaker** (15A 50A) for general use.
- Your panel is **under 125A**, as the breaker may not be suitable.
- You require **adjustable trip settings or GFCI protection**, as this breaker does not offer those features.
- You are unsure about **proper installation**, as incorrect wiring can be dangerous.
**Alternative Considerations:**- For **general residential use**, a **30A 50A breaker** (e.g., Schneider Homeline or Square D CH series) may be more cost-effective.
- If **adjustable trip settings are needed**, consider a **Square D QPX with an adjustable trip module**.
- For **GFCI protection**, pair this breaker with **dedicated GFCI breakers or outlets** where required.
**Final Verdict:** The **LC1D128Q7 is a solid investment for high-load applications** but should be carefully evaluated against your specific electrical needs to ensure it is the right fit. Always consult a **licensed electrician** before installation.
Part Number LC1D128Q7. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed. The product is used surplus.
All products are guaranteed to be working but may show signs of use.