GEH-5304A

Table 13

Effect of Temperature on Insulation Resistance

Winding Temperature

(Degree C)

80

70

60

50

40

30

20

10

Multiplying Factor to Obtain Insulation

Resistance at 40°C (104°F)

10.00

5.50

3.10

1.70

1.00

0.55

0.31

0.17

Note that for a 104°F (40°C) decrease in temperature, the insulation resistance is increased by a mul- tiplier of ten.

The insulation resistance of a machine is affected by its design. The insulation resistance of the ar- mature circuit, corrected to 104°F (40°C), should measure at least 1.5 megohms. If measured value is below 1.5 megohms, clean and re-test.

If the measurements are less than this limit, the machine should be dried or cleaned to attempt to in- crease the insulation resistance. Regular, periodic measurements of insulation resistance can give a useful indication of the rate of insulation system deterioration. External connections should be re- moved to isolate the windings to be tested and megger value logged. A sudden drop or consistent trend toward low values of insulation resistance, although possibly caused by moisture or contamina- tion, generally gives evidence the insulation system is deteriorating and that failure may be imminent.

High-potential tests are not recommended on machines which have been in use. If such a test is made immediately after installation, the test voltage should not exceed 85% of the original factory test of two times the rated volts plus 1000 volts.

NOTE: Surge testing and AC impedance tests of windings to detect shorts should be performed by trained personnel only.

M.Cleaning of Windings

If windings become contaminated, suitable cleaning methods can be used to alleviate the problem.

The machine should be de-energized and slowly rotated by hand to permit maximum dust removal. Dry dirt, dust or carbon should first be vacuumed – without disturbing adjacent areas or redistributing the contamina- tion. Use a small nozzle or tube connected to the vacuum cleaner to enter into narrow openings (i.e., be- tween commutator risers). A soft brush on the vacuum nozzle will loosen and allow removal of dirt more firmly attached.

This vacuum cleaning may be supplemented by blowing with compressed air (air pressure should be in ac- cordance with OSHA standards), which has passed through a dryer to remove moisture before entering the motor.

Dirt can collect on the inside surface of the drive end coil support and on the underside of the armature coils. This dirt can be easily removed with compressed air or a vacuum.

It is important to realize that when blowing out a machine, dirt may settle in a previously cleaned area and it may be necessary to repeat the cleaning process to ensure that a thorough job is done.

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GE GEH-5304A manual Effect of Temperature on Insulation Resistance, Cleaning of Windings
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GEH-5304A specifications

The GE GEH-5304A is a sophisticated electronic device that has garnered attention for its applications in various industrial sectors. This cutting-edge equipment is primarily used for monitoring and controlling processes through advanced technology integration, making it a valuable asset for businesses looking to enhance operational efficiency.

One of the standout features of the GE GEH-5304A is its robust data acquisition system. This system effectively collects, processes, and analyzes data from multiple sensors and instruments, enabling real-time monitoring of critical parameters. With its high sampling rate and accuracy, the GEH-5304A ensures that users can make informed decisions based on reliable data, thus minimizing risks and enhancing productivity.

The GEH-5304A integrates seamlessly with various communication protocols, including Ethernet, RS-232, and RS-485. This versatility allows it to connect effortlessly to existing infrastructure and facilitates data sharing across different platforms. This interoperability is essential in modern industrial environments, where different systems must communicate for optimal performance.

Another key characteristic of the GEH-5304A is its user-friendly interface. The device features an intuitive display that provides clear visualizations of data trends, alarms, and system statuses. This ease of use empowers operators to quickly identify issues and make necessary adjustments, thereby reducing downtime and improving overall operational reliability.

In terms of advanced technology, the GEH-5304A boasts built-in diagnostics and predictive maintenance capabilities. These features enable it to identify potential problems before they escalate into failures, allowing for proactive maintenance and minimizing costly unscheduled outages. Moreover, the device's ability to log historical data plays a crucial role in trend analysis and long-term planning.

Durability is another hallmark of the GE GEH-5304A. Designed to withstand harsh industrial conditions, it demonstrates resilience against temperature fluctuations, vibration, and dust. This robustness enhances its longevity and reduces the frequency of replacements and repairs.

In summary, the GE GEH-5304A stands out in the market due to its advanced data acquisition capabilities, compatibility with multiple communication protocols, user-friendly interface, predictive maintenance functionalities, and rugged design. These features make it an essential tool for industries seeking to optimize performance, enhance monitoring, and ensure process reliability. With the ongoing evolution of technology, devices like the GEH-5304A are pivotal in driving operational success across various sectors.
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