Product Overview
ES3R-A – Single Phase VFD for Constant Pressure
The ES3R-A by Phase Technologies is a single-phase variable frequency drive (VFD) designed for constant pressure control in submersible pump applications. It’s the ideal solution for residential and light commercial applications, offering reliable performance, motor versatility, and easy setup packaged in a rugged, outdoor-rated enclosure.
Compatible with both 2-wire and 3-wire single-phase submersible motors, the ES3R-A ensures smooth operation and steady water pressure, even as demand fluctuates.
Key Features:
- Constant Pressure Control – Integrated PID control automatically adjusts pump speed to maintain steady system pressure.
- Supports 2-Wire & 3-Wire Motors – No extra components required—just wire and go.
- Single-Phase Input & Output – Perfect for off-grid, rural, or residential locations with no three-phase power available.
- Rugged NEMA 3R Enclosure – Weather-resistant and built for outdoor installation.
- Quick Setup – Fast & easy, step-by-step Perfect Pressure setup for pumping applications.
- Built-In Protection – Overload, underload, short circuit, and thermal protections keep your system safe and running smoothly.
Technical Specifications:
Electrical:
- Input Voltage: 120V or 240V (single-phase)
- Input Voltage Range: 90–160V / 180–260V
- Input Frequency: 60 Hz
- Output Voltage: V/F
- Output Frequency: 5–120 Hz
- Horsepower Range: 1/3 HP to 2 HP
- Motor Compatibility: 2-wire and 3-wire single-phase motors
Environmental:
- Operating Temperature:
- Up to 50°C (122°F) for 1/3 to 1.5 HP
- Up to 40°C (104°F) for 2 HP
- Enclosure Rating: NEMA Type 3R (outdoor)
Physical:
- Dimensions: 12.25" H x 9.25" W x 4.68" D
- Weight: 7.2 lbs
Controls & Inputs:
- Overload Capacity: 150% for 2 seconds
- Short Circuit Withstand: 5 kA RMS
- Digital Inputs: 2 programmable, isolated
- Optional Analog Inputs: 4–20 mA or 0–5 VDC
Whether you're upgrading an existing system or installing a new one, the ES3R-A provides smooth pump control, extended motor life, and consistent water pressure.
Motor Compatibility Chart
