2-5-5
Assume a five-kilovolt rated cable to be terminated indoors in switchgear. The thickness of the stress cone at its peak (T) is ? . a. 1/4" b. 1/2" c. 3/4" d. 11/16"
A- 1/4"
Assume a five-kilovolt rated cable to be terminated indoors in switchgear. The cable jacket should be removed for ? plus the depth of the lug barrel. a. 10" b. 12" c. 16" d. 18"
A- 10"
There are ? common termination types. a. 5 b. 6 c. 7 d. 8
A- 5
The upper level at which a termination can withstand surges, such as lightning surges, is known by the initials ? . a. BIL b. LCN c. LSM d. RMS
A- BIL
Without stress control, the cable's electric field becomes very concentrated and the resulting voltage stress is high enough to break down the air. This break down is referred to as a partial discharge or ? . a. corona b. dead short c. electrostatic field d. longitudinal stress
A- corona
The two best insulator materials for providing cable tracking protection are silicone rubber and ? . a. porcelain b. teflon c. varnished cambric d. wood
A- porcelain
The way to shrink a Quick Term II Termination onto the cable is to slide the termination body onto the cable and remove the core. Starting with the loose end, pull while unwinding ? . a. clockwise b. counter-clockwise c. in one quick motion d. slowly
B- counter-clockwise
The upper level at which a 15-kilovolt rated termination can withstand surges, such as lightning, is ? crest. a. 66 kV b. 90 kV c. 110 kV d. 155 kV
C- 110 kV
The type of IEEE termination that provides stress control and should be used in a clean, dry environment is the Class ? . a. 1 b. 2 c. 3 d. 4
C- 3
A termination's ? distance is the surface distance between a conductor and ground, also referred to as the string distance. a. breakdown b. corona c. creepage d. failure
C- creepage
One function that an IEEE Class 1 Termination provides is ? between the high voltage conductor and ground. a. a conductive path b. a semi-conducting bridge c. external leakage protection d. moisture protection
C- external leakage protection
Three problems that are associated with a non-shielded termination include ? , electrical connection of the conductor, and physical protection of the cable insulation. a. lack of corona protection b. longer bend radius c. mechanical support d. no surface leakage protection
C- mechanical support
The function of the bottom seal on an IEEE Class 1 Termination is to provide a(n) ? to the cable jacket and ground wire. a. current path b. equipotential bond c. moisture seal d. path to ground
C- moisture seal
For additional protection, the termination's creepage path may be covered with ? tape. a. copper braided b. semi-conducting c. silicone d. stress relief
C- silicone
The type of stress control used in heat shrink terminations is a ? . a. braided overlay jacket b. prefabricated stress cone c. stress control tube d. stress drain wire
C- stress control tube
In addition to the termination's voltage stress, two conditions are necessary for tracking. One condition is contamination and the other is ? . a. corona b. electrolysis c. high overvoltage condition d. moisture
D- moisture
Some porcelain terminations are referred to as "potheads." A pothead performs sealing functions because it is filled with a(n) ? . a. conductive jell b. insulating tar c. jell that solidifies below 120°F d. potting compound
D- potting compound
A(n) ? gradually increases the total thickness of insulation from the edge of the semi-conducting shield out to a certain point on the cable's insulation. a. beveling tool b. epoxy insulation compound c. layer of tape d. stress cone
D- stress cone
The two functions of a termination insulator are to provide BIL protection against flashover damage and to provide ? protection for the cable's insulation. a. moisture b. phase-to-phase c. rodent d. tracking
D- tracking
An IEEE Class 1 Termination does not provide a seal to the external environment and must be sealed with two layers of tape. Select one: True False
False
Tape termination is not one of the common termination types because it takes too long to apply. Select one: True False
False
A basic (tubular) heat shrink termination for outdoor use can be upgraded by installing separate heat shrink skirt(s). Select one: True False
True
An IEEE Class 1 Termination has two seals located at the top and bottom. Select one: True False
True
One function that an IEEE Class 1 Termination provides is electrical stress control for the cable shield terminus. Select one: True False
True
Terminations are categorized as live-front connections. Select one: True False
True
