TECO Electric Motor AEHH8B

SECTION: 2.4 Insulation resistance test during storage

Even during storage, the insulation resistance should be kept above the specified values

Insulation resistance test should be performed once every three months

SECTION: 4.1.2 Measurement of insulation resistance

WARNING — During and immediately after measuring, the terminals must not be touched as they may carry residual dangerous voltages:

Furthermore, if power cables are connected, make sure that the power supplies are clearly disconnected and there are no moving parts

For rated voltage below 1000V, measured with a 500 VDC megger

For rated voltage above 1000V, measured with a 1000VDC megger

In accordance with IEEE 43, clause 9.3, the following formula should be applied: R~ (Rated voltage (v) / 1000 + 1) x 10 (MΩ)

Ensure the volume and quality of lubrication oil are in compliance with specifications

Check motion of the oil ring to ensure it is not clamped

Measure the shaft endplay and ensure it is within the specified range of the red groove of the shaft

Is the shaft endplay within the ±0.118 in. (±3mm) range of the drive-end shaft shoulder?

Check for reverse shock load conditions

Check starting frequency conditions

Inspect ratchet pins for deformation

Listen for unusual noises from ratchet pins

Replace ratchet pins if necessary

Inspect check valve and stop valve in the discharge line

Maintain check valve and stop valve if necessary

Check the wear level of the carbon brush

Is the brush worn beyond acceptable limits?

Replace the carbon brush if worn beyond acceptable limits

Verify the brush material against the motor's nameplate

Is the recommended brush material being used?

Refer to CNS 2322 C4051 or JIS C2802 for brush, holder, and gap dimensions

Change the oil at regular intervals

Determine the interval for oil changes based on operating conditions

Is the ambient temperature high, requiring more frequent oil changes?

Avoid operating the motor with oxidized oil

Use only good grade, oxidation-corrosion-inhibited turbine oils from reputable companies

Is the ambient temperature near or below freezing?

Preheat the oil or use special oil if necessary

Use the lubrication oil stipulated on the motor's lubrication nameplate, if available