Overview

For more than 40 years Baker Instrument Company has focused on quality control testing of electrical windings. We manufacture fully programmable automated test systems and insulation test instruments.

Test systems include winding resistance, high potential, surge, and other tests for a wide variety of windings, from fractional horsepower appliance motors up to 3,000 kilowatt traction motor armatures. Our broad range of experience along with a focus on providing the most advanced and practical technology combine to create quality control workhorses for your business.

With this sytem, DC HiPot, Bar-toBar Resistance/Weld and Bar-to-Bar Surge tests are standard. The AC HiPot test is available as an option. Any winding can be tested thoroughly and accurately in seconds.

WinAST8800 SATS/MATS Operation

What sets the WinAST8800 SATS/MATS systems apart from other winding test systems is its highly sensitive computer controlled testing, analysis and report generation. The WinAST8800 SATS/MATS computer makes testing fully automatic and masterless.

• No Master Winding: A Master winding need not be connected to the tester during routine production testing. Neither does the operator need not set the test voltages or pass/fail limits during model changeover saving time. Test parameters are programmed into a Master data file. Programming each winding model takes just a few minutes. The WinAST8800 SATS/MATS program is a simple, pull-down menu driven interface. The user is prompted for all necessary information. Once the Master has been defined, it is permanently stored. Testing is then automatically sequenced according to the Master file. Your tests are accurate. Repeatability is automatic.
• Automation: To testing a winding, a Master data file is created and assigned. In a manually operated system, the operator need only start each test from the test fixture. When each test is complete, a pass/fail indication is clearly displayed conveniently on the screen and on the operator's control console. Quality control with an WinAST8800 SATS/MATS system is quick.

WinAST8800 SATS/MATS Testing

• AC & DC Tests: For AC HiPot (High Potential-Optional) testing, the WinAST8800 SATS/MATS uses arc detection to sense breakdowns to ground or between windings which would otherwise go undetected using average current measurement techniques. It also has capacitive compensation capability. This measures the resistive portion of the leakage current, rather than the total current. DC HiPot testing checks the integrity of the insulation system with high DC voltage. Leakage current is then measured in micro amps rather than milliamps.
• Bar-to-Bar Resistance Test: The bar-to-bar resistance test is used to identify faults in the winding, such as high-resistance welds, improper wire gauge, and incorrect turn count. A true differential, 4-wire resistance measurement technique is used in the WinAST8800 SATS/MATS to eliminate errors on low resistance windings. Ambient temperature compensation is a standard feature and infrared temperature sensing is optional. The software has the ability to accurataely test constant resistance, single flyer wound and double flyer wound armtures by learning the resistance pattern and using a variety of analysis methods to detect problems in the winding resistance patterns.
• Bar-to-Bar Surge Test: The high voltage surge or impulse test checks for insulation problems between turns, coils, and phases of the winding. Surge tests can also detect other faults which change the inductance of a winding such as improperly annealed lamination steel and reversed coils. The system uses an impedance transformer to apply a very high current impulse to the winding so that very low inductance form wound armatures can be properly tested.

Reports & Statistics

Reports can be displayed on the monitor, printed, stored on floppy or hard disk, or transferred over a computer communications network.

Fixtures

All WinAST8800 SATS/MATS must have fixturing to connect to the armature commutator and shaft and to rotate the armature for testing. Both the SATS and MATS fixtures are designed to accommodate a wide range of armature sizes. Because the armatures are rotated for bar-to-bar testing, the testers can accomodate any number of bars on the commutator.

Specifications