Insulation Testing Standards

[PhaseShift]

Does anyone know where I can find good insulation testing standards / specifications for cable insulation and motors?

IEEE, NETA, NEMA, etc...?

 

[zog]

You answered your own question. Download the NETA specs at www.netaworld.org

 

[zog]

Here are the basics for motors:

Machines >200 Hp (150kW) ? conduct PI test
Machines < or = 200 Hp (150kW) ? perform DAR
On machines 2300V or more:
? Perform DC HiPot test (1.0)
? Perform phase to phase stator resistance test (1.0)
IR test values corrected to 40 degrees Celsius

Minimum IR readings:
? IR 1 min = 100M for DC armature and AC winding built after 1970
? IR 1 min = 5M for most machines and random-wound stator coils and form wound coils rated below 1kV
? IR 1 min = kV+1 for machines made before 1970, all field windings, and others not listed above

Investigate phase to phase stator resistance that vary by more than 10%

 

[zog]

LV cables rated at 600V should be tested at 1000VDC and be at least 100M. MV cables gett very complex so if that is what you need I suggest you actually get the standards.

 

[PhaseShift]

Would the motor specs be in the NETA "ATS" 2009?

What is the difference between NETA standards for motor and IEE-43 standards?

For motor under 200hp you it states that an IR test result of 5meg is acceptable for motor built in 2005?

 

[zog]

Would the motor specs be in the NETA "ATS" 2009?

Yes

What is the difference between NETA standards for motor and IEE-43 standards?[/qupte]
IEEE 43 is one of the references noted and some of the motor testing info in NETA is drawn from that standard.

For motor under 200hp you it states that an IR test result of 5meg is acceptable for motor built in 2005?

Depends on the type of motor, and needs to be temp corrected to 40 degrees C. If the windings are at room temp your IR values would need to be about twice that.