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The ST103, ST106 and ST112 bring you innovations in testing of electrical insulation systems. This tester features the proven accuracy and reliability of over 45 years of experience. Specifically designed for shop or field performance, these analog instruments provide a cost effective solution for motor testing. The ST103, ST106 and ST112 represent Baker Instrument Company on-going commitment to quality in the design of high performance test equipment.
The ST112A, ST106A and ST103A were designed to diagnose faults in electrical windings. With these easy-to-use instruments perform High Potential and Surge tests. DC High Potential testing detects faults in groundwall/earth ground and also provides a complete Polarization Index test. The groundwall/earth insulation system consists of the wire insulation, slot liner insulation, wedges, varnish and sometimes phase paper.
Surge testing detects faults in both inter-turn winding and phase-to-phase insulation systems. Comparisons of leads can be done visually on the screen.
Total tester control from the front panel with easily accessible connectors make this instrument simple to use. The zero start interlock provides safe operation for both operator and equipment.
Applications
Versatility makes this instrument an essential component for both preventative and predictive maintenance programs. The capability to test all insulation systems of coils and windings make this unit ideal for use on motors, generators, transformers, chokes, solenoids and a variety of other coils.
With the ST112A, ST106A and ST103A testers, you can verify the quality of new or rewound windings before you have to
depend on their performance. Whether you’re in the shop, in the plant or in the field, these analog testers are capable of
troubleshooting, diagnosing and predicting motor failures, prior to them happening.
Additional features
• QRR high voltage component design
• Autoranging overcurrent trip setting
• Overcurrent warning indicator light
• Leakage current displayed on CRT gives quick indication of faults and provides a real-time visual reference for controlling high voltage testing.
• Specially designed CRT displays circuits for maximum reliability
• Test lead insulation rated to 40 kV
• Leads energized warning indicator
• All leads ground test switch position
• 3-phase test select switch
Baker ST106A
