0
The number of poles refers to how may separate signals or if you will, wires you switch when the switch is activated or deactivated. For example your typical light switch just switches the hot wire and turns the light on or off and is called a SPST switch.
The SPDT switches a signal to either of two circuits. So for example, if you had hot connected to the input and a light connected to each output (Throw), you would have one light on and one off and each time you throw the switch the lights switch which is off and which is on.
The DPDT can switch two separate signals at the same time and each goes to one of two separate circuits. If you had two separate breakers and four light bulbs you could hook up one breaker hot to one pole and the other breaker to the second pole. If you had four light bulbs each connected to each of two switch outputs, then one bulb from each breaker would be on and when switched the other bulb on each breaker would be on.
For diagrams just search for SPDT and DPDT.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is the main purpose of SPST and DPST switches?
An SPST switch can break the connection or hold the connection depending on which switch your using.
What is the purpose of the holding circuit in a magnetic motor starter?
It hold the main contacts closed until the control circuit through the interlock is broken.
Explain what a circuit main earth does?
Basically, it's an earth connection applied for the purpose of making apparatus safe to work on before a Permit to Work or Sanction for Test is issued. Disconnect from power, test dead, apply CME.
What is a sub panel?
A sub-panel is always fed from a main panel. The main panel is situated where the electrical service wiring first enters the main structure on a dwelling plot or building site.A sub-panel can be situated within the same building as the main panel or it can be in a subsidiary building or structure (such as a garage, garden shed or workshop) that is separate from the main building.More informationA sub-panel is another name for a secondary breaker box, just as "the main panel" is another name for "the main breaker-box"."Breaker-box" and/or "panel" are just alternative short names that are used instead of the full name "circuit breaker box".
What is the use of ring main unit?
ring main unit is distributing the power supply to meter cubicalAnswerA ring-main unit (rmu) is a piece of switchgear that is used to connect a transformer's primary winding to a high-voltage ring main. It consists of three load-breaking switches, each with three positions: 'on', 'off', and 'earth'. They enable the transformer to be connected/disconnected to the ring; the ring to be 'broken'; or the transformer to be connected to either half of the broken ring. The 'earth' positions allow the transformer's secondary to be earthed, or either half of the (broken) ring to be earthed.
Which networking device main purpose is to segment collision domains?
switches
What is the main purpose of SPST and DPST switches?
An SPST switch can break the connection or hold the connection depending on which switch your using.
What is the function of an switch?
Auxiliary switches are separate switches with circuit which helps for the function of commutation of main switches of a converter.
What was the main purpose of the crusades?
the main purpose of the crusades was to be themselves
What was the main purpose of the Crusade?
the main purpose of the crusades was to be themselves
What is the main purpose of newspapers?
The main purpose is to distribute news to people.
Is the main purpose of using Automata?
Is the main purpose of using Automata?
What is the main purpose of a guitar?
the main purpose of the guitar is to play music
What was George Grenville's main purpose?
what were goerge grenvill's main purpose
What is the main purpose in factoring trinomials?
the main purpose of this is to dance randomly
Which is not a main purpose of supporting details?
is explaining a main idea a main purpose of supporting details
Is not a main purpose of supporting details?
is explaining a main idea a main purpose of supporting details
