electric motor winding data sheet download

inversely proportional to cooling effectiveness.īelow is the data for start and stop in 5 columns, defined as follows:ģ =+LN((WindingTemp-183)/(71.5-183)) for startģ =+LN((WindingTemp-71.5)/(188.3-71.5)) for stopĤ = rate of change of #3 per hour based on this row and previous row.ĥ = 1/#4 = estimated time constant in hours Tau_running / tau_stopped = / = Rrunning/Rsecured ~ (1/3)Ĭ = thermal heat capacity (constant regardless of run or stop) The time constant for temperature change upon stop was 7 - 10 hours. Load was constant during the running period. Learn more from the Baker Surveyor DX datasheet.The smallest motor that we have continuous temperature monitoring on is a 300HP TEFC vertical 460vac squirrel cage induction motor.īased on temperature data recorded by our plant computer, the time constant (tau) for temperature change following a start is 2 - 3 hours (hourly computed time constant remains in this range for 11 hours which leads me to dimiss starting current as an important factor). Surveyor DX software enables Baker DX operators to use a personal computer to store more test data, generate and view reports across the full spectrum of Baker DX tests, and share and compare analysis with other maintenance personnel using data from multiple analyzers. The ZTX, which includes the ATF5000 commutator probe accessory, allows the DX to apply surge tests to coils which require higher currents. The DX’s benefits can be extended to low-impedance coils, such as armatures, through the use of the Baker ZTX low impedance coil accessory. It can also detect problems with connections such as feed cable insulation weakness, motor imbalances, opens or high resistance. It can identify if contamination is impacting insulation strength. The Baker DX can find early indications of insulation weakness and faults in windings, between phases, coil-to-coil and in groundwall insulation. The standards-compliant surge test – a signature feature of Baker testers for decades – is the only test that can safely expose turn-to-turn insulation weaknesses. In a motor repair shop, or for new production motors, the Baker DX gives confidence that a motor is correctly wound and insulated, before it’s deployed in the field. The Baker DX series can apply a wide set of off-line electrical tests to assess the condition of motors and coils.

In an industrial setting, the consequential cost of failure or unplanned downtime of critical rotating machinery can be significant. Coil mode for rapid testing and data storage.High and low voltage tests to characterize circuits and insulation.Compatible with the Baker PPX Power Packs for testing up to 40 kV.4 kV to 12 kV for wide spectrum of motors and coils.

Configurable to meet needs and price point.

Comprehensive range of tests in one instrument.

Electric motor winding data sheet download