18 study tips for the NETA Level 4 exam

[Test Tech from DMV]

1. Know what is required in NETA Maintenance for MV Starters

2. Does an unbalance of 10% "ruin" motors?

3. Power Factor is performed or not performed on what?

4. 15KV Switchboard Acceptance Test Value AC and DC.

5. Sync Motor True / False Question

6. Why is an Oil Sample taken from the bottom of a Xfmr filled with mineral oil. Know the Specific Gravity.

7. CO and IAC current circuits are which terminals.

8. Reducing Ground Resistance to 5 Ohms, Think about it 5 Ohms? It can be reduced but not to an specific value.

9. NETA Acceptance Testing on a Capacitor. What has to be done?

10. NETA Reference for a Molded Case Breaker. Pole to Ground

11. Cable Bus Facts.

12. Generator Loss of Field Question.

13. NETA VLF Acceptance Testing Values.

14. Resistances of Fuses.

15. Differential Relay Advantages or Disadvantages

16. Watt Hour Meter Calculations

17. Sync Check Relay Question

18. Types of Insulation used for 15KV Switchgear


I will post more, my brain is fried,
Good Luck.

[Test Tech from DMV]

What three leads are on a Megger?

Earth, Guard, Positive or Negative.

I got this one wrong and did massive research. Pick Three

P.I. of 1.4, Do you continue?

The ones you think are easy are worded to make you think or over think.

[Test Tech from DMV]

Electro Mechanical Relay Protection is set at a value of .2 (200ms) of one another. Is this acceptable? Oh by the way, these are critical loads.

[SecondGen]

This is a great example of why it is very important to read and think about the question before answering.



Reducing Ground Resistance to 5 Ohms, Think about it 5 Ohms? It can be reduced but not to an specific value.

[slts1991]

Does an unbalance of 10% "ruin" motors?

It will not ruin it but if it is more than 10% it will.
See the source I found here: http://www.motorsanddrives.com/cowern/motorterms13.html

[slts1991]

Reducing Ground Resistance to 5 Ohms, Think about it 5 Ohms? It can be reduced but not to an specific value.
NETA Reference for a Molded Case Breaker. Pole to Ground
Cable Bus Facts.

Hi,

Can you please explain these 3 more in detail. Thanks

[SecondGen]

Can you please explain these 3 more in detail. Thanks


Reducing Ground Resistance to 5 Ohms, Think about it 5 Ohms? It can be reduced but not to an specific value.

You can lower a ground reading, but getting it to an exact value would be near impossible. There are too many variables at play.


NETA Reference for a Molded Case Breaker. Pole to Ground

Assuming molded case breaker is 600V then 100 Megohms - NETA ATS/MTS Table 100.1 Insulation Resistance Test Values Electrical Apparatus and Systems Other Than Rotating Machinery. http://testguy.net/content/240-Insulation-Resistance-Test-Values

Cable Bus Facts

Not sure what the question is.

[slts1991]

Reducing Ground Resistance to 5 Ohms, Think about it 5 Ohms? It can be reduced but not to an specific value.

You can lower a ground reading, but getting it to an exact value would be near impossible. There are too many variables at play.


NETA Reference for a Molded Case Breaker. Pole to Ground

Assuming molded case breaker is 600V then 100 Megohms - NETA ATS/MTS Table 100.1 Insulation Resistance Test Values Electrical Apparatus and Systems Other Than Rotating Machinery. http://testguy.net/content/240-Insulation-Resistance-Test-Values

Cable Bus Facts

Not sure what the question is.

Lol. I asked this question almost 2 years ago.

[SecondGen]

Lol. I asked this question almost 2 years ago.

Better late than never I guess :p