SKF power packs

Baker PP30, Baker PP40 and Baker PP85

Power packs

Effective, affordable insulation testing for high voltage motors and coils

When coupled with an SKF Static Motor Analyzers (certain Baker DX and Baker AWA-IV models), these units extend the insulation testing voltage range.  They are ideal for use in manufacturing, predictive maintenance, motor rewind and repair settings.

High-voltage machines
Many of the critical motors in a plant are high voltage motors. These big motors efficiently drive the critical processes in industry. To effectively verify the insulation in these machines, higher test voltages and currents are required, compared to what is available in a portable motor analyzer.  SKF power packs work in concert with an SKF Static Motor Analyzer (host). They verify insulation at voltages up to 40 kV, with up to 2600 A of current available.  SKF Baker Power Packs help verify the condition of insulation on form-wound coils, high voltage AC motors, and large DC motors.

Complete high-voltage motor and coil tests
Thoroughly testing of the insulation on high-voltage coils requires an array of tests.  SKF power packs provide thorough testing of ground wall insulation with multiple methods. Meg-Ohm tests, step tests, ramp tests, Polarization Index (PI)/Dielectric Adsorption (DA), and hipot tests are included.

To verify turn-to-turn and phase-to-phase insulation, the surge test with Pulse to Pulse Error Area Ratio (PPEAR) analysis is used to detect insulation weakness. Using a SKF Baker Static Motor Analyzer, coil resistance, inductance and capacitance measurements can be performed to verify the proper winding construction. These also help verify correct materials have been used in the coils, the windings are clean, and assembly of the coils into the motor was performed correctly.

Configurations and models
SKF power packs come in four models.  The Baker PP30, PP40 and PP85 are built with a mobile, wheeled cabinet for easy transport to the test area.  Each cabinet has an AC outlet for the host unit, as well as lead storage for the power pack. The Baker PP30 provides up to 30 kV of test voltage. It has three switchable test leads for simple connections to three-phase motors. 


The Baker PP85 is essentially a Baker PP30 with an internal armature test circuit built in for testing large DC motors.  When in armature mode, the test voltage is limited to 2100 V, however, the current available is increased up to 10,000 A. The Baker PP40 is a single lead tester with test voltages up to 40kV. The Baker PP24 provides similar capabilities to the Baker PP30 and PP40 with a maximum test voltage of 24 kV.  

The PP24 is a single test lead unit, and is packaged in a small 19-inch rack without wheels. 

Summary
High-voltage motors and machines are critical assets at modern industrial sites. SKF power packs provide complete, affordable insulation test capability for large AC and DC electric motors and coils.  When coupled with an SKF Static Motor Analyzer, it provides a safe, thorough test to keep high voltage motors and coils are in top working condition.

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