Iris Power MDSP3
The MDSP3 detects rotor cage winding faults including broken rotor bars, cracked shorting rings and unequal air gaps.
- Advanced Algorithms: to accurately predict the operating slip from the measured current. The slip calculations can also be done at different loads.
- Simplicity: Can detect cage winding faults and eccentricity with the use of a single clamp-on current sensor connectedto the secondary side of 50 or 60 Hz motor current transformer; or around one of the phase leads.
- Reliability: Reduces the risk of false indications by distinguishing between noise and legitimate rotor bar problems, with a noise floor greater than 100 dB.
- On‐line measurements: All testing is done on‐line, in less than 75 seconds in normal mode, to find problems before they cause additional motor
- Range and accuracy: Can accurately test motors under varying load conditions and includes two current probes to cover a wider range of current from 5A to 1000A.
- Portable and safe: Needs only one input from a current probe clamped directly to one of the phase leads or the secondary side of a CT at the motor MCC or breaker. Processor is powered through the USB connection or 100 to 200 V 50/60 Hz power supply.
- Rugged data acquisition unit with Windows operating system and pre-installed software for Iris Power MDSP3 (Panasonic Toughbook or similar)
- Rotor Core damage: Broken bars cause local temperature increases and arcing leading to rotor core damage
- Premature degradation of bearings: Broken rotor bars cause torque and speed oscillations on the rotor. This degrades the bearings
- Rotor bar movement and failure: Broken rotor bars can lift out of the rotor slot due to centrifugal force or pieces of them can break off and cause a stator winding failure
- Rotor bending: Large air pockets in rotor windings cause non‐uniform bar expansion leading to rotor bending and unbalance
- Rotor eccentricity: For the rotor rotating off‐center, both static and dynamic eccentricity in conjunction with the resulting unbalanced magnetic pull can lead to: 1) high vibration levels from rotor unbalance, 2) a rotor to rub against the stator bore which can cause a stator winding failure