The 1200A-3PH is a three phase injection system providing commissioning and maintenance engineers with a flexible system for testing protective systems. It has an easy to understand panel layout and a simple user interface. The status of every function can be seen at a glance, and there are no complex menus to navigate.
Each loading unit has two output taps to allow for a range of load impedance. Each phase is isolated and can be configured to either give a maximum of 1200A at 3.5V or 600A at 7V. Three true RMS metering ranges are provided, allowing the full scale of the meter and trip level to be set independently of the selected output.

An auxiliary metering input is provided and can measure voltage, current, frequency, and the phase between any of the current outputs and an external voltage or current.
The timing system is very flexible without compromising ease of use, allowing trip times, reset times and reclose times to be quickly measured to a high degree of accuracy. Two independently isolated contact inputs are provided, and the timing system may also be used as a stand-alone timer.
The 1200A-3PH can be use to test many single and three phase devices including:

• Over current relays
• Under current relays
• IDMT relays
• Auto-reclosers
• Time delay relays
• Earth fault relays
• Miniature circuit breakers
• Power relays
• Tripping relays
• Thermal relays