3027 Three Phase Power Controller

The model 3027 is a three phase, Zero-Cross SCR power controller. The controller provides control of electrical power to resistive loads by means of silicon controlled rectifiers connected in two of the three lines. Control of power is linear with respect to a command signal. The command signal is electrically isolated from the line and load voltage.

The model 3027 controller features a compact design, a single plug-in circuit card for ease of operation and an electrically isolated heatsink. All three line leads are fused.

Some features include:

• Line voltage compensation holds load voltage constant with changes in line voltage
• Sync-Guard™ smooths out line current draw when multiple controllers are in use
• Trans-Guard™ decreases the possibility of DC building up on the supply transformer
• Thermostatically protected
• On-board line fusing for 85-425A frames, eliminating the need to fuse twice
• Compact and economical
• Fast cycling distributive control improves heater life and reduces temperature variations
• 2500 VAC RMS isolation between input/output and line voltage/heatsink
• Convection and forced-air cooled