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Relay Circuits Vocabulary Matching ExercisePresented by ElectricianEducation.com
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1. |
holding contacts |
a. indicator of operation status |
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2. |
momentary contact |
b. continues 3 hours or more |
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3. |
dependent operation |
c. a motor can run briefly |
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4. |
normally open (not i) |
d. protect motor from damage |
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5. |
two wire control |
e. metal bar prevents simultaneous operation |
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6. |
sequence operation |
f. any motor can run anytime |
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7. |
continuous load |
g. relay not used to control motor |
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8. |
control voltage |
h. uses magnetism to operate switch |
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9. |
jog mode |
i. normally open |
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10. |
OR operation |
j. motor continues until stop pressed |
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11. |
independent operation |
k. usually powers control components |
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12. |
pilot light |
l. thermostat |
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13. |
relay |
m. has holding contacts |
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14. |
electrical interlock |
n. first A then B then C |
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15. |
normally closed (not u) |
o. set of opposite relay contacts in series |
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16. |
stop pushbutton |
p. has same line control voltage |
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17. |
run mode |
q. a path for current flow |
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18. |
inch operation |
r. usually powers loads |
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19. |
mechanical interlock |
s. allow motor to run without operator |
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20. |
start pushbutton |
t. A can run. If not then B can run |
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21. |
control relay |
u. normally closed |
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22. |
three wire control |
v. no path for current flow |
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23. |
low voltage |
w. need not match load |
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24. |
line voltage |
x. brief change in conductivity |
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25. |
overloads |
y. slight movement |
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z. if A is run, then B can run |
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