Hello readers welcome to the new post. In this post, we will learn What Is A Shunt Trip Breaker & How Does It Work. 2023 Detailed Guide. There is electrical system safety is the main parameter for the power system/ The main element hat ensures the safety of electrical installation is the shunt trip breaker. In this post, we will discuss the all details shunt trip breaker and other parameters. So let’s get started What is a shunt trip
What is a Shunt Trip Breaker?
The shunt trip breaker is the replacement of circuit breakers which helps to trip breaker from some distance automatically when the urge comes and prevent any harmful effect or damage of any fault. There are two main types of shunt trip breakers first one is automatic and the second is manual
- Automatic shunt trip breakers come with a sensor that helps the detection of faults such as overvoltage and overcurrent and its signal is given to the shunt trip breaker that trips the circuit
- Manual shunt trip breakers are connected with a remote switch for tripping the breaker at some distance. it is beneficial to shut off the power supply at a distance such as a fire alarm and security system
Shunt trip breakers work with the use of small currents from shunt trip terminals. The field created by the current trips the breaker.
How Does a Shunt Trip Breaker Work?
A shunt trip breaker is tripped from some distance with the use of tripped to its shunt coil. it automatically trips the breaker in case of any fault like an overload. The shunt breaker works with the use of a solenoid to mechanically trip the breaker. it has a coil that energizes and creates a magnetic field. Fields make attraction with plungers and trip breakers that open the contacts and restrict the current flow.
Shunt trip breakers are preferred for distance breaker trips. such as those used in industrial locations where high chances of fire. They also used in buildings to off the power supply at distant locations
Components of Shunt Trip Breaker
A shunt trip breaker comes with differnt components:
This part of the shunt trip breaker is employed for carrying and interruption of current flow. Their main function s to control high current and make reliable connections
The shunt coil is an electromagnet that gets an electrical signal for breaker tripping. It produces a magentic field when gets energized releases the latch and starts the tripping process
it helps to disconnect the mechanical circuit when the breaker trips. it has a latch that helps contact during normal working but releases due to trip signal.
The control wiring triggers the device remotely or control panels. It works for remote activation of the shunt trip to provide the protection layers
Installation and Wiring of a Shunt Trip Breaker
To install a shunt trip breaker, follow these instructions.
- First of all, off the power supply
- Select the accurate location for the shunt trip breaker in the panel
- Connect the breaker with panel bus bars and make its connections accurately
- Connect control wiring from the shunt trip breaker with the remote triggering device
- Make grounding and electric connection of different points
- Finally, ON the main power supply and test the shunt trip breaker to have the accurate function
Applications of Shunt Trip Breakers
- Commercial buildings
- Hospitals and healthcare facilities
- Data centers
- Industrial facilities
- Hotels and resorts
Benefits and Advantages of Shunt Trip Breakers
- it has protection for remote sources to disconnect power during any fault.
- its high-speed response time helps to avoid electrical hazard
- it can be easily integrated with older electrical systems.
- it also has compatibility with different devices used in circuitry like ground fault circuit interrupters and arc fault circuit interrupters
Maintenance and Troubleshooting of Shunt Trip Breakers
- Regular inspection of the breaker helps to find the symbols of damage or wear.
- Perform differnt electrical tests to check the it is working accurately or not
- Make sure there are no dust particles on the breaker so clean it regularly
- Make it properly lubricated
- After finding the fautls solve it
Comparison with Other Circuit Protection Devices
Shunt trip breakers vs. standard circuit breakers
|Shunt Trip Breaker
|Standard Circuit Breaker
|Less complex structure
|Remotely off the power
|Overload, short-circuit protection provided
|shut off electrical equipment during a fire.
|switching of load in Industries, Buildings,
Shunt trip breakers vs. ground fault circuit interrupters (GFCIs)
|Shunt Trip Breaker
|Protection from overloads and short circuits
|ground faults protection
|The current imbalance between hot and neutral wires
|Where remote or automatic power shutoff needed
|Wet areas, protect from severe electric shocks
|low complex structure
Shunt trip breakers vs. arc fault circuit interrupters (AFCIs)
|Shunt Trip Breaker
|overloads and short circuits protection
|Protects against arc faults
|Work on the basis of the thermal-magnetic trip mechanism
|microprocessor for detecting arcing used
|10 to 1000A
|5 to 6000 A
|10 to 20 milliseconds
|10 to 40 milliseconds
Tips for Choosing the Right Shunt Trip Breaker
- Choose according to the voltage rating of your circuit
- it has compatibility with electrical panels and other protection devices used in circuitry
Shunt trip breaker wiring
Its wiring is very simple and easy. The shunt coil has two terminals one used for voltage supply and the other for neutral. The supply is about 120 volts AC and the neutral is connected to the neutral point of the breaker
The shunt coil is attached in a series combination with the push button. When we press the button it closes teh circuit to the shunt coil that trips the breaker. It is good to check that the shunt coil is rated for a similar voltage to the breaker. If the shunt coil does not have the same rating it can be damaged
Diagram of Shunt Trip Breaker Wiring Diagram
Why Are Shunt Trip Breakers Important?
- safety: Shunt trip breakers are helpful for minimizing the effect of electric fires and damage with the use of automatic trip of the breaker. it is best for avoiding the risk of fire or damaging
- Remote control: These breakers trip circuits from distant points, so not accessible points can be controlled through this device
- Flexibility: it is used in commercial, industrial, and residential settings.
Where Do People Most Often Use Shunt Trip Breakers?:
- Industries: in industries, there is a high chance of fire so it is used there. They can be used for a tripping breaker if there are overloading conditions
- Commercial buildings: it is used in buildings to power off at some points where faults exist. Like, they used to off the power to a fire alarm or data center
- Residential applications: it is also used in homes to trip breakers if there is a power surge or fire alarm triggered
How does a shunt trip breaker work?
A shunt trip breaker controlled by a small current from some distance. It is best for uses where it has the ability to off power to circuitry from distant points, like fire alarm systems
How is a shunt trip breaker wiring?
The shunt trip terminals are connected to the top and lower parts of the circuitry breaker. Small-size wire is used for wiring the shunt trip breaker between the shunt trip points and the remote source of supply. The power source can be battery relays
What is the purpose of a shunt with a relay?
The shut relay provided the remote tripping for the breaker. The shunt low resistance conductor is connected between the circuit breaker and relay. When current passes through the shunt, it makes a magentic field that functions as the relay. The relay close contacts that trip the breaker.
What is shunt trip and under voltage?
Shunt trip and under voltage are differnt terms used for the differnt tripping methods of the breaker. Shunt trip use a shunt to have remote tripping. Under voltage is tripping off the circuit breaker when voltage loses less than a certain value
Where is shunt trip used?
- Fire alarm systems
- Security system
- Power distribution
- Industrial control systems
What is the difference between shunt and resistance?
The main difference between a resistor and a shunt is the temperature coefficient of thermal EMF. For resistors thermal EMF is not considered but for shunt resistors considered, based on temperature values two different conductive materials generate variable voltage
Is the shunt resistor AC or DC?
Shunt resistors can be used for both AC and DC circuits. Though the value of the shunt resistor will be different from ac and DC circuits
Why is it called a shunt resistor?
The term shunt originated from the Latin word “scindere”, which means to split. A shunt resistor is used for spiting current in circuitry.
Why is low resistance called shunt?
When the resistor is connected with another resistor of low values then the equivalent resistance is lower than a single resistor that shunts the resistor.
What is another name for a shunt resistor?
it also called a shunt resistor is a current-dividing resistor.
What is unit of shunt resistance?
The unit of shunt resistance is ohm (Ω).
What is shunt resistance formula?
The shunt resistance formula is:
Rs = V/I
- Rs is the shunt resistance
- V is the voltage of the shunt resistor
- I is the current passing through the shunt resistor