EZ2 Series
Three Phase SCR Power Control – Zero Voltage
Phasetronics EZ Series zero voltage switching controllers fire at the absolute minimum voltage differential across the SCR — virtually RFI free. Variable time proportioning (zero-fired) combines low cost with microprocessor technology for precise control.
| AC Supply Voltage | 200 – 575 Vac |
| Amp Ratings | 10 to 1,000A |
| Control Signal | 4-20 mA, 10-50 mA, 0-5 mA, 0-10 Vdc |
| Switching | Zero Voltage Switching |
| Phase | Three Phase |
RFI Free
Zero voltage switching at minimum differential virtually eliminates radio frequency interference.
Microprocessor Technology
Rapid-cycle control combines low cost with microprocessor precision.
Variable Time Proportioning
Zero-fired variable time base SCR control for accurate and consistent power delivery.
Versatile Loads
Suitable for resistive, inductive, and lamp-type loads in industrial applications.
EZ2 Series
Technical Specifications
Automatic Signal Input
4–20 mA (500 Ω) | 0–5 mA (2 kΩ) | 10–50 mA (200 Ω) | 0–10 VDC (34 kΩ)
Manual Control
10 kΩ, 2W potentiometer, linear taper (customer provided)
Output Voltage
0 to 100%
Output Current Rating
10 to 1,000 Amps (model dependent)
Output Stage
Back-to-Back configuration (AC Switch)
AC Supply Voltage
120 / 208 / 240 / 380 / 415 / 480 / 575 VAC (+10% / -15%, 50/60 Hz)
Type of Loads
Resistive Only
LED Readouts
PC board mounted LEDs indicate ON status and output. Plug connection allows readouts to be remotely located.
Switching Method
True Zero Voltage Switching — fires at the absolute minimum voltage differential across the SCR with a gate pulse applied prior to the zero crossing point. Virtually RFI free.
Control Technique
Variable time proportioning, microprocessor-controlled rapid-cycle technique.
On-to-On Cycle Time
1 to 3 cycles for power ranges of 25% to 100% — minimizes off time for smooth even output.
Transient Voltage Suppressor
Integral MOV (Metal Oxide Varistor) protects against high-potential transient voltage.
SCR Peak Inverse Voltage (PIV)
Units up to 100A: 1600V
Units 150A to 1000A: 1800V
Cooling
Convection cooling through 150A. Fan cooled at 225A and above.
Ambient Temperature
Operating range 0°C to 40°C (32°F to 104°F)