Ideally suited to all short period low power primary injection tasks the T&R Test Equipment 750ADM-H Current Injection Set is a compact, rugged primary current injection system with a 750A output capability and maximum no load output voltage of 5V. The set has two outputs allowing for the injection of currents from 750A down to a few hundred milliamps and voltages up to 16V are available on the 40A output enabling higher impedance trips to be tested. Four true RMS metering ranges are provided, allowing the full scale of the meter and trip level to be set independently of the selected output.

The flexible timing system measures trip times, reset times and reclose times quickly with a high degree of accuracy. Two contact inputs are provided, each of which may be trigged by a volt-free contact or a dc voltage and the contact inputs auto-sense for normally open or normally closed contacts. The unit is protected by electronic over current and thermal trips on the outputs, and circuit breakers on the input and power circuit. Additionally an earth terminal is provided for connection to a local earth and the unit will automatically switch-off at the end of the test. The 750ADM-H can be used to test many devices including circuit breakers, primary injection of over-current relays, auto-reclosers and MCB’s. The unit can also be used for current transformer ratio testing and as a dual channel stand-alone timing system.

• Primary injection up to 750A
• 4V output
• 16V 40A output for secondary injection
• True RMS digital metering
• Memory ammeter
• Multi-function timing system
• Large back-lit liquid crystal display
• Thermal and over-current protection
• Automatic switch-off at end of test
• Compact and portable
• Automatic mains voltage selection