7300A Power Controller

Three Phase Power Controller – 7300A

Product Description

7300A Power Controller

  • Current range from 16 to 160A at 45°C
  • Voltage up to 500V
  • Input current: 0-20mA or 4-20mA
  • Input voltage: 0-5V or 0-10V

Firing modes:

  • Phase angle
  • Fast cycle
  • Single cycle
  • Advanced single cycle
  • Transformer burst firing
  • Suitable for virtually all load types
  • Current limit option
  • Digital communications

These units consist of three thyristor controlled channels each rated at the specified current and voltage.

Firing Modes

The 7300A is available with a selection of firing modes to suit most applications. It is suitable for controlling resistive loads with high or low temperature coefficient, short wave infrared (SWIR) or inductive loads, including transformer burst firing.

Control modes

7300A units use one of the following:

  • RMS load voltage squared (V²),
  • RMS load current squared (I²)
  • Load power (P)
  • Open loop (OL)
Limits and alarms

Optional current limit, which can work in all firing modes, prevents excessive currents from flowing in the load circuit.

Optional alarms can warn of thyristor short circuit or load open circuit (GRF alarm). Additionally partial load failure with automatic set up can detect the loss of one out of up to four parallel loads (DLF alarm).

Over temperature shutdown is provided with fan cooled units (above 125 Amps) with optional alarm.

Digital Communications

The Modbus communications option provides digital control of the unit, interrogation of the alarms, firing status and online configuration.

  • Glass lehrs
  • Heat treatment – metal furnaces
  • Plastics
  • Ceramic furnaces
  • Semi-conductor manufacture
  • Induction heating
  • Transformer coupled loads
  • Time/temperature dependant loads