Schneider Power Factor APFC Relay RT12 (12 Step) – 51213
The Schneider Electric 51213 (Varlogic RT12) is a 12-step Automatic Power Factor Correction (APFC) relay designed to monitor and maintain optimal power factor in industrial and commercial electrical systems. It automatically controls capacitor banks to improve efficiency and reduce electricity penalties.
⚙️ Product Overview
- Model: 51213
- Series: Varlogic RT (EasyLogic RT12)
- Type: APFC Relay / Power Factor Controller
- Steps: 12 Step (controls 12 capacitor stages)
- Operating Voltage: 400–440V AC
- Frequency: 50/60 Hz
- Mounting: Panel mount
- Display: Digital (multi-parameter display)
The relay continuously measures power factor and reactive power demand, and automatically switches capacitor steps ON/OFF to maintain the desired PF.
✨ Key Features & Benefits
- ⚡ 12-Step Capacitor Control
Controls up to 12 capacitor banks independently for precise correction - 📊 Real-Time Monitoring
Displays Voltage, Current, kW, kVAr, kVA, and Power Factor - 🔄 Automatic & Manual Modes
Flexible operation with programmable settings - 🧠 Intelligent Switching Algorithm
Prevents step hunting and uneven capacitor usage - 🛡️ Built-in Protection Features
- Over-voltage / under-voltage
- Over-compensation & under-compensation alarms
- Capacitor overload protection
- 💡 LED Indication for Each Step
Shows real-time status of all capacitor stages - 🔧 Auto C/K Setting
Simplifies commissioning and setup
🏭 Applications
- Automatic Power Factor Correction (APFC) panels
- Industrial plants & manufacturing units
- Commercial buildings & malls
- MCC / PCC panels
- Electrical distribution systems
⚡ How It Works
The RT12 APFC relay:
- Continuously measures system power factor
- Compares it with the set target value
- Automatically switches capacitor steps ON/OFF
- Maintains optimal PF and avoids penalties
👉 This ensures efficient energy usage and stable system performance
🏆 Why Choose Schneider RT12 (51213)?
The RT12 12-step APFC relay is a reliable and industry-standard solution for:
- ✔️ Reducing electricity bills (avoid PF penalties)
- ✔️ Improving system efficiency
- ✔️ Extending equipment life
- ✔️ Ensuring stable voltage and load balance
It is ideal for medium to large APFC panels requiring precise multi-step capacitor control.
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