Interested to Buy Any Domain ? << Click Here >> for more details...
What is double throw isolator and single throw Isolator.
- 1 Answers
- 6971 Views
- KSEB, L&T, Siemens, I also Faced
- E-Mail Answers
Answer Posted / praveen kumar rai
In electronics, switches are classified according to the arrangement of their contacts. A pair of contacts is said to be "closed" when current can flow from one to the other. When the contacts are separated by an insulating air gap, they are said to be "open", and no current can flow between them at normal voltages. The terms "make" for closure of contacts and "break" for opening of contacts are also widely used.
The terms pole and throw are also used to describe switch contact variations. The number of "poles" is the number of separate circuits which are controlled by a single switch. For example, a "2-pole" switch has two separate identical sets of contacts controlled by the same switch. The number of "throws" is the number of separate wiring path choices other than "open" that the switch can adopt for each pole. A single-throw switch has one pair of contacts that can either be closed or open. A double-throw switch has a contact that can be connected to either of two other contacts, a triple-throw has a contact which can be connected to one of three other contacts, etc.[4]
In a switch where the contacts remain in one state unless actuated, such as a push-button switch, the contacts can either be normally open (abbreviated "n.o." or "no") until closed by operation of the switch, or normally closed ("n.c." or "nc") and opened by the switch action. A switch with both types of contact is called a changeover switch. These may be "make-before-break" ("MBB" or shorting) which momentarily connects both circuits, or may be "break-before-make" ("BBM" or non-shorting) which interrupts one circuit before closing the other.
These terms have given rise to abbreviations for the types of switch which are used in the electronics industry such as "single-pole, single-throw" (SPST) (the simplest type, "on or off") or "single-pole, double-throw" (SPDT), connecting either of two terminals to the common terminal.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
how was your last weekend.
What are the types of piano switches?
Alternator rotor earth fault relay circuit
How to Calculate the Fault Level of Electrical Installation
i am going to correct power factor of 1600kw induction motor,when i calculate capacitance of capacitor it is three time more in star connection than delta. if motor is star connected which connection i shall adopt for capacitors and reason for adopt this connection
What are the essential characteristics of signal flow graphs?
why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?
What will be the diameter of pipe between conservation tank and transformer
Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??
how does ELR works? explain
Can clean earth cable be considered as low current cable
I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.
What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???
In India the supply voltage is 230 volt A.C. During the negative half cycle phase becomes neutral and neutral become phase? or what will happen during negative half cycle? how the electrons flow during positive and negative half cycle?
while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends
