Housed in a hard field case, the SEW 6280TB Calibration Test Box is used for checking the integrity and calibration of insulation resistance testers, loop impedance testers and RCD testers, as well as multifunction electrical testers, which may have all three functions in one instrument.

The 6280TB is an easy to use, robust instrument designed for field or workshop use and can test a wide range of instrumentation.  The control panel on the 6280TB is divided clearly into three sections, with each function having its own section. To operate the test box, the user simply plugs the mains cable into a standard GPO and plugs the instrument being tested into the box.

For RCD tester verification, the 6280TB can simulate a 10mA, 30mA and 150mA RCD with trip times of 150ms or 30ms (in the case of a 150mA simulation). Similarly loop impedance is checked by plugging the meter being tested into the loop tester section of the test box and operating the meter being tested. The bi-directional switch on the 6280TB allows the operator to measure the local supply loop, and then by flicking the switch, the test box can simulate a loop impedance value (supply loop + 1 Ohm) to verify the accuracy of the loop impedance tester being checked. Finally the 6280TB can check insulation resistance testers, in both insulation resistance mode as well as continuity mode, with a number of pre-set values and test voltages.

Key Features:

• Wide range of operating voltages from AC 210V/50Hz to 250V/50Hz
• Calibration check of: RCD Testers, Loop Testers and Insulation Testers
• Simulate 3 RCD Test currents and Trip times
• Wiring checks: Phase, Neutral, Earth
• Fuse protected
• Supplied with test leads and plugs
• Plugs into main supply outlets for power
• Optional isolation transformer available separately