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Silver has the least tendency for arcing and damage from repeated engagements. Silver lasts a lot longer than copper. Gold is also used too but is more expensive.
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What is potntial and potential free contact?
Potential free contacts (also called "dry contacts") are simply contacts which are physically operated with the main device, but not electrically connected to it. For example a motor contactor often has auxiliary contacts that are operated by the main coil and open and close at the same time as the main contacts but are not used for control of the motor starter. If they are connected to an outside circuit to indicate the status of the starter without being powered by the motor supply they would be considered potential free contacts. These type also called Signal-Contacts. In case of relays and switches if the common/pole is connected internally to a given potential like a 110V phase etc., the contact is not POTENTIAL FREE but if both the common and the normall open (and at time also the normally closed) contacts are presented to the user for connecting in his system as he pleases,the contact is said to be "potential-free".
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.
What type of material is used as contact material in switches?
Copper is used as a substrate of the contact meterial; on the grounds of cost; but the actual contacts themselves may be made of silver. Silver does not corrode a badly as copper, and a well designed switch will have a 'wiping' action in its operation, for this prolongs the life of the contacts. In corrosive atmospheres, such as Rotorua, New Zealand, there is a quantity of H2S in the atmosphere, and platinum contacts are often used.
What happens if you energize power to wire on n.c. contacts?
If the relay contacts are in series with a connected load, then the load will energize.
What is the Function of NO and NC contacts?
Normally open and normally closed contacts are used in controls circuitry. They serve many functions.
What are Breaker point contacts are made of?
Breaker point contacts are made of silver plated copper.
Were is the platinum in a circuit breaker?
There isn't, the contacts in a circuit breaker are plated with silver.
What is silver plated zinc?
it is zinc plated in silver
Is sheridan silver plated or sterling?
Sheridan silver is copper plated with silver.
Is a silver pitcher labeled montclair oneida community limited silver or silver plated?
Mine is Silver Plated.
Does silver plated have any value?
First of all, theres no such thing as "silver plated sterling". Sterling is 92.5% silver, anything plated is just plated. If the item is solid sterling silver, its metal value depends on the current price of silver - but it may be worth more as a collectible. If it's plated base metal it has very little value.
Are silver plated cables any good?
Yes silver plated cables are actually recommended more over the gold plated ones. A lot of people say that the gold plated ones are a waste of money since you can get the same result or better from the silver plated.
Is tibetan silver stirling or plated?
Tibetan silver is plated rather than made of sterling silver. Cast iron or copper is used to make Tibetan silver. Then it is plated with sterling silver or any other material that looks like sterling silver.
Is a tray labeled Henley ocl oneida community ltd silver plated?
Silver plated.
If it is gold plated over silver does that mean that it is true gold or fake?
Gold plated over silver means that the ring is made of silver with a thin layer of gold plated to it. It is not solid gold but solid silver with gold on it.
What does SPNS mean?
Silver plated nickel silver
A motor starter will have a set of auxiliary contacts which is used to provide a?
Feedback to a control circuit that the motor starter has closed or opened its contacts as commanded.
