m-Series Mini Dual Circuit Plus™ Battery Switch - Red
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Simultaneously switches two isolated battery banks or combines battery banks to all loads. SI-ACR automatically combines batteries during charging, isolates batteries when discharging and when starting engines. The Combine function can be used to parallel the batteries in the event of a low engine battery. Simultaneously switches two isolated battery banks or combines battery banks to all loads Make before break contact design allows switching between battery banks without power interruption.
Support Specifications. Frequently Asked Questions. Instructions Dimensioned Drawing. Selector 3 Position Switches isolated battery banks to all loads.
You have cookies disabled. Many features of the site will not function until cookies are enabled. You are using an outdated browser. Selector 4 Position. Selector 3 Position. Dual Circuit. Dual Circuit Plus. Alternator Field Disconnect. Continuous Rating. Intermittent Rating.
Cranking Rating 30 sec. Triple Battery Bank Management Panel. Dual Battery Bank Management Panel.
On/off switch built-in:this led wire power cord with built-in ON/OFF switch,you can plug your fixture right into any electrical outlet near you Easy to install: no need welding, high safety, no need to worry about hard-wiring, plug it into the receptacles already, turn on the switch and instant light. easy for anyone to . Shop Wire, Cord & Cable at kristinfrey.com Browse all Wire, Cord & Cable pricing and availability for your job or project. In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical contacts connected to external circuits.
In electrical engineering , a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit , interrupting the electric current or diverting it from one conductor to another. When a pair of contacts is touching current can pass between them, while when the contacts are separated no current can flow. Switches are made in many different configurations; they may have multiple sets of contacts controlled by the same knob or actuator, and the contacts may operate simultaneously, sequentially, or alternately.
A switch may be operated manually, for example, a light switch or a keyboard button, or may function as a sensing element to sense the position of a machine part, liquid level, pressure, or temperature, such as a thermostat. Many specialized forms exist, such as the toggle switch , rotary switch , mercury switch , push-button switch, reversing switch , relay , and circuit breaker. A common use is control of lighting, where multiple switches may be wired into one circuit to allow convenient control of light fixtures.
Switches in high-powered circuits must have special construction to prevent destructive arcing when they are opened. The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts , which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting.
The mechanism actuating the transition between these two states open or closed are usually there are other types of actions either an " alternate action " flip the switch for continuous "on" or "off" or " momentary " push for "on" and release for "off" type. A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece.
Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. For example, a thermostat is a temperature-operated switch used to control a heating process. A switch that is operated by another electrical circuit is called a relay.
Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be padlocked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock.
An ideal switch would have no voltage drop when closed, and would have no limits on voltage or current rating. It would have zero rise time and fall time during state changes, and would change state without "bouncing" between on and off positions. Practical switches fall short of this ideal; as the result of roughness and oxide films, they exhibit contact resistance , limits on the current and voltage they can handle, finite switching time, etc.
The ideal switch is often used in circuit analysis as it greatly simplifies the system of equations to be solved, but this can lead to a less accurate solution. Theoretical treatment of the effects of non-ideal properties is required in the design of large networks of switches, as for example used in telephone exchanges. In the simplest case, a switch has two conductive pieces, often metal , called contacts , connected to an external circuit, that touch to complete make the circuit, and separate to open break the circuit.
The contact material is chosen for its resistance to corrosion, because most metals form insulating oxides that would prevent the switch from working. Contact materials are also chosen on the basis of electrical conductivity , hardness resistance to abrasive wear , mechanical strength, low cost and low toxicity. The formation of oxide layers at contact surface, as well as surface roughness and contact pressure, determine the contact resistance , and wetting current of a mechanical switch. Sometimes the contacts are plated with noble metals , for their excellent conductivity and resistance to corrosion.
They may be designed to wipe against each other to clean off any contamination. Nonmetallic conductors, such as conductive plastic, are sometimes used. To prevent the formation of insulating oxides, a minimum wetting current may be specified for a given switch design. 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 electrically separate switches which are controlled by a single physical actuator.
For example, a " 2-pole " switch has two separate, parallel sets of contacts that open and close in unison via the same mechanism. 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.
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. A switch with both types of contact is called a changeover switch or double-throw 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.
In electrical power wiring i. Form A . Form B . Form C . Switches with larger numbers of poles or throws can be described by replacing the "S" or "D" with a number e. Contact bounce also called chatter is a common problem with mechanical switches and relays , which arises as the result of electrical contact resistance ECR phenomena at interfaces. Switch and relay contacts are usually made of springy metals. When the contacts strike together, their momentum and elasticity act together to cause them to bounce apart one or more times before making steady contact.
The result is a rapidly pulsed electric current instead of a clean transition from zero to full current. The effects of contact bounce can be eliminated by use of mercury-wetted contacts , but these are now infrequently used because of the hazards of mercury. Alternatively, contact circuit voltages can be low-pass filtered to reduce or eliminate multiple pulses from appearing.
In digital systems, multiple samples of the contact state can be taken at a low rate and examined for a steady sequence, so that contacts can settle before the contact level is considered reliable and acted upon.
All of these methods are referred to as 'debouncing'. Software-based contact debouncing methods  are usually based onto a multiple polling with simultaneously statistics storing. The simplest method is a similarity counting algorithm, that continuously and periodically polls the contact.
If the current instant read is equal to previous, counter increments, otherwise, it clears. The contact considered as a trust closed-up, when the similarity counter reaches some predefined threshold value.
An improved method consists in denoting one of a contact states as a desirable target , which is difficult to get into needs a multiple equal values, which have inextricably inputted during threshold period and easy to leave a single contact conjoin value leads to reset of trust state. In this case, a Mealy finite-state machine FSM approach is suitable.
Auto-repeat is a feature when after the first contact closing-up condition is detected, the polling FSM begins to periodically emit the addition closing-up signals of button pushing predominantly with the decreasing of time period between emits.
During auto-repeating FSM behaves itself in relation to the upper-level subroutine similar to a pulse-frequency modulator. This feature is a strongly necessity in such application as an input devices for example, in remote control units, RCU. All electronic and software-based debouncing methods only mask or filter the bounce transient process for sensitive or control digital circuits, or soften and shorten the trajectory of the electrical component of the transient process.
By analogy, the term "debounce" has arisen in the software development industry to describe rate-limiting or throttling the frequency of a method's execution. Low-pass filtered schmitt trigger input for debouncing. SR flip-flop in a debouncing circuit  . In the Hammond organ , multiple wires are pressed together under the piano keys of the manuals.
Their bouncing and non-synchronous closing of the switches is known as Hammond Click and compositions exist that use and emphasize this feature. Some electronic organs have a switchable replica of this sound effect.
When the power being switched is sufficiently large, the electron flow across opening switch contacts is sufficient to ionize the air molecules across the tiny gap between the contacts as the switch is opened, forming a gas plasma , also known as an electric arc.
The plasma is of low resistance and is able to sustain power flow, even with the separation distance between the switch contacts steadily increasing. The plasma is also very hot and is capable of eroding the metal surfaces of the switch contacts.
Electric current arcing causes significant degradation of the contacts and also significant electromagnetic interference EMI , requiring the use of arc suppression methods. Where the voltage is sufficiently high, an arc can also form as the switch is closed and the contacts approach. If the voltage potential is sufficient to exceed the breakdown voltage of the air separating the contacts, an arc forms which is sustained until the switch closes completely and the switch surfaces make contact.
In either case, the standard method for minimizing arc formation and preventing contact damage is to use a fast-moving switch mechanism, typically using a spring-operated tipping-point mechanism to assure quick motion of switch contacts, regardless of the speed at which the switch control is operated by the user. Movement of the switch control lever applies tension to a spring until a tipping point is reached, and the contacts suddenly snap open or closed as the spring tension is released.
As the power being switched increases, other methods are used to minimize or prevent arc formation. A plasma is hot and will rise due to convection air currents. The arc can be quenched with a series of non-conductive blades spanning the distance between switch contacts, and as the arc rises, its length increases as it forms ridges rising into the spaces between the blades, until the arc is too long to stay sustained and is extinguished.
A puffer may be used to blow a sudden high velocity burst of gas across the switch contacts, which rapidly extends the length of the arc to extinguish it quickly.
Extremely large switches often have switch contacts surrounded by something other than air to more rapidly extinguish the arc. For example, the switch contacts may operate in a vacuum, immersed in mineral oil , or in sulfur hexafluoride.
In AC power service, the current periodically passes through zero; this effect makes it harder to sustain an arc on opening. Manufacturers may rate switches with lower voltage or current rating when used in DC circuits.
When a switch is designed to switch significant power, the transitional state of the switch as well as the ability to withstand continuous operating currents must be considered. When a switch is in the on state, its resistance is near zero and very little power is dropped in the contacts; when a switch is in the off state, its resistance is extremely high and even less power is dropped in the contacts.
However, when the switch is flicked, the resistance must pass through a state where a quarter of the load's rated power [ citation needed ] or worse if the load is not purely resistive is briefly dropped in the switch.
For this reason, power switches intended to interrupt a load current have spring mechanisms to make sure the transition between on and off is as short as possible regardless of the speed at which the user moves the rocker. Power switches usually come in two types.
Dual-action switches incorporate both of these features. When a strongly inductive load such as an electric motor is switched off, the current cannot drop instantaneously to zero; a spark will jump across the opening contacts.
Switches for inductive loads must be rated to handle these cases. The spark will cause electromagnetic interference if not suppressed; a snubber network of a resistor and capacitor in series will quell the spark. When turned on, an incandescent lamp draws a large inrush current of about ten times the steady-state current; as the filament heats up, its resistance rises and the current decreases to a steady-state value.
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