Common Terms and Concepts Associated with HV Systems Flashcards
1
Q
According to the CEC, HV is any voltage above ___V
A
750V
2
Q
The WCB specifies that only _____ and _____ persons may be allowed to work on HV
A
trained, qualified
3
Q
What is “medium voltage” as defined by the IEEE standards?
A
2400V to 69000V
4
Q
An electrostatic field is due to which of the following?
a. Voltage
b. Current
c. Air
d. Resistance
A
a. Voltage
5
Q
What effect does electric stress have on insulation?
A
It weakens insulation
6
Q
Why is creep age distance kept relatively long?
A
To minimize leakage current over insulation
7
Q
What does BIL stand for, and what significance does it have for the insulation of HV equipment?
A
Basic impulse insulation level. Requires higher levels of insulation than rated voltages would indicate
