CUTLER HAMMER S811T30N3S Soft Start Reduced Voltage Motor Starter
Product Overview
The CUTLER HAMMER S811T30N3S is a reduced voltage soft starter designed to control three-phase induction motors with superior performance and protection. By gradually increasing motor voltage during startup, it reduces mechanical stress on shafts and couplings while minimizing electrical current surges. This results in improved motor life, smoother operation, and optimized energy consumption.
Engineered with robust components and smart protection functions, the S811T30N3S provides reliable motor control across industrial sectors, including manufacturing, oil & gas, water treatment, and HVAC systems. It incorporates advanced diagnostics, overload protection, and communication features for seamless integration into automated systems.
Key Features:
- ⚡ Soft Start & Soft Stop: Smooth motor acceleration and deceleration, reducing wear on mechanical components.
- 🛡️ Motor Protection: Overcurrent, phase imbalance, phase loss, and stall protection.
- 📊 Diagnostics & Monitoring: Real-time status display with event and fault logging.
- 🔌 Wide Voltage Range: Compatible with diverse industrial motor ratings.
- 🌐 Communication Ready: Supports Modbus and optional Ethernet for integration into plant networks.
- 🖥️ User-Friendly Design: Built-in keypad and display for easy programming and monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | S811T30N3S |
| Manufacturer | Cutler Hammer (Eaton) |
| Product Type | Reduced Voltage Soft Starter |
| Motor Rating | 30 HP @ 460 VAC |
| Input Voltage | 200–600 VAC, 3-phase |
| Control Voltage | 120 VAC |
| Frequency | 50/60 Hz |
| Protection Features | Overcurrent, phase loss, phase imbalance, stall protection |
| Soft Start Ramp Time | 1–30 seconds adjustable |
| Soft Stop Time | 0–30 seconds adjustable |
| Operating Temperature | -10°C to 50°C |
| Mounting | Panel mount |
| Display | LED/LCD interface with fault codes |
| Communication Protocols | Modbus RTU, optional Ethernet/IP |
| Compliance | UL, CE certified |
Installation & Maintenance Guidelines
Installation Tips:
- Install in a clean, dry, and vibration-free location with adequate ventilation.
- Ensure motor and line connections follow the wiring diagram provided.
- Provide proper circuit protection (fuses or breakers) before connecting power.
- Configure ramp-up and ramp-down times according to motor and load requirements.
Maintenance Recommendations:
- Perform regular inspections of terminals for looseness or corrosion.
- Check ventilation and clean air passages to avoid overheating.
- Verify protection settings periodically to ensure they match motor specifications.
- Test start/stop cycles under controlled conditions after parameter adjustments.
Safety Precautions:
- ⚠️ Disconnect all power sources before performing wiring or service.
- ⚠️ Do not exceed rated voltage or motor capacity.
- ⚠️ Installation and servicing should only be carried out by qualified personnel.
Recommended Similar Products
| Product Model | Description | Link |
|---|---|---|
| S811T20N3S | Soft starter for 20 HP motors at 460V | View |
| S811T40N3S | Higher capacity soft starter for 40 HP motors | View |
| S801N25N3S | Compact reduced voltage starter for 25 HP applications | View |
| S811+S75N3S | Advanced soft starter with expanded motor protection | View |
| S811T60N3S | Large motor starter for heavy-duty applications, 60 HP | View |
Purchase & Support:
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