PR3-E-290kW 400A 415V

Description

The PR3-E-290KW HVAC Controller is a high-performance, enclosed 3-phase burst fire thyristor power regulator designed to deliver seamless control of resistive loads up to 290kW. Engineered using the reliable two-thirds control technique, this power controller utilises zero-voltage switching burst fire technology to minimise electrical noise (RFI) and prevent flicker, ensuring smoother operation across HVAC and industrial applications.

This robust and efficient unit is equipped with automatic temperature trip reset, high-speed semiconductor fuses, and an integrated heatsink with forced-air cooling, all enclosed in a durable casing for reliable, high-temperature environments. Designed for fast and easy installation, it features clearly labelled terminal access for both signal and power connections.

Applications
The PR3-E-290KW power regulator is ideal for large-scale HVAC systems and other industrial applications that require precise and reliable thermal control, including:

• Air curtains

• Industrial furnaces

• Ovens

• Dryers

• Hot plates

Its capability to regulate high-capacity resistive loads makes it especially well-suited for demanding temperature control systems in commercial and industrial settings.

Key Features

• Rated power: 290kW (400A) at 415V AC

• Fast-pulse zero-voltage switching for minimal RFI and flicker

• Control options: 0–10V DC (default), 0–5V, 4–20mA, or 5K potentiometer

• Built-in fault diagnostics with LED indicators for overtemperature, phase loss, and sensor failure

• Overtemperature protection: automatic trip at 90°C, reset at 85°C

• Forced-air cooled for high-load reliability

• NATO Stock Number (NSN): J250 99 1554088

• Robust terminal blocks with torque-optimised connections

NATO Stock Number (NSN) J250 99 1554088