Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 23, Problem 1SQ
What is the safety feature of a lock-stop push button?
Expert Solution & Answer
To determine
Describe about the safety feature of a lock-stop push button.
Explanation of Solution
Description:
A control circuit of a lock-stop push button can be padlocked in the off position. Due to this, it is difficult for anyone to start a machine. In an emergency situation, a lock-stop push button can be used intentionally to stop the machine or equipment. If anyone unintentionally touches the push button, then the contact will not be released unless the push button reaches the lock position.
Conclusion:
Thus, the safety feature of a lock-stop push button is described.
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Can you check my connections and answers.
A communication satellite is in stationary (synchronous) orbit about the earch (assume
altitude of 22.300 statute miles). Its transmitter generates 8.00 W. Assume the transmit-
ting antenna is isotropic. Its signal is received by the 210-ft diameter tracking parabo-
loidal antenna on the earth at the NASA tracking station at Goldstone, California. Also
assume no resistive loss in either antenna, perfect polarization match, and perfect
impedance match at both antennas. At a frequency of 2 GHz, determine the:
(a) power density (in watts/m²) incident on the receiving antenna.
(b) power received by the ground-based antenna whose gain is 60 dB.
Determine VO during the Negative Half Cycle of the input voltage,
Vi
12 V
f = 1 kHz
-12 V
C
...
+
0.1 με
Si
R
56 ΚΩ
Vo
Vi
2 V
-
0
+
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