b16 trip switch

https://www.rockwellautomation.com/en-us/products/details.140MT-C3E-B16.html

Motor Protection Circuit Breaker, C Frame, 1 - 1.6A, Trip Class 10, Standard Breaking Capacity, Std Mgntc Trp (Fxd at 14 x le)

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Allen Bradley 140M-C2E-B16 Motor trip switch 1.0-1.6amp

Allen Bradley 140M-C2E-B16

3 Pole Motor trip switch 1.0 -1.6amp

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16A SP Type B 6kA MCB, Standard

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Product details.

• · Spare plug in MCB, 16A
• · Wylex Standard range
• · Colour coded blue
• · Voltage rating 240V AC
• · Tripping Characteristics Type B
• · Single Pole
• · Breaking Capacity 3Ka

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International, most common tripping characteristics in miniature circuit breakers explained.

Understanding the tripping characteristics of MCBs is crucial for selecting the appropriate MCB type based on the anticipated load and protection requirements of electrical circuits, ensuring efficient and reliable electrical protection. The tripping characteristic, also known as the I-t curve, determines how quickly an MCB cuts off current during overloads or short circuits. The three most commonly used tripping characteristics are B, C, and D. We explain the differences between them and their use cases.

1. How a Miniature Circuit Breaker (MCB) works

Miniature circuit breaker is an automatic switching device used to protect low-voltage electrical conductors and cables from short circuits and overloads. MCB's are available in single-pole, double-pole, triple-pole, and four-pole configurations.

Figure 1: Single-pole MCB (suitable for installation in residential distribution boards)

Figure 2 shows the built-in  MCB's in a residential distribution board.

 Figure 2: Built-in MCB's in a residential distribution board

In residential applications, we commonly use MCBs to protect the electric cables, which supply lighting circuits (typically a 10-ampere MCB) and circuits for outlets, stoves, etc. (typically a 16-ampere MCB).

Each pole of an MCB includes:

a) Thermal release, which utilizes the property of a bimetallic disk (or bimetallic strip, depending on the technology) to bend and cause a trip when heated by current. Its operation has an inverse time-delay characteristic and depends on the thermal action of the current flowing through the tripping unit. In other words, the larger the overload current, the shorter the trip time. The thermal release provides protection against overloads. (see Figure 3, 4 - tripping characteristics of an MCB).

b) An electromagnetic tripping unit, which is also an overcurrent release, the operation of which depends on the force exerted by the current of the main circuit, which feeds the coil of the electromagnet. In the case of a sufficiently large current (a multiple of the nominal current of the installation circuit breaker), the tripping is instantaneous - a few milliseconds. Their task is to protect against the effects of short-circuit currents.

Depending on the level of cut-off current, we separate type B MCBs, where the cut-off is between 3 to 5x rated current, type C MCBs with 5-10x rated current and type D MCBs with 10-20x rated current.

In the event of overload or short circuit, the MCB interrupts the circuit, and after the fault is resolved, it can be reset without replacing a fusible element, as is it's main advantage compared to conventional fuses.

2. Overload and short circuit

Let us explain the difference between overload and short circuit using a simple example. Overloading of a conductor or cable happens, when an electric current, greater than what the cable can withstand (permissible current of said cable) flows through it. Based on the expected load of each circuit, the electrical designer selects the appropriate cross-section of the cable, and based on this, the appropriate MCB is also selected (its rated current in amperes is important).

In the event that the current is greater than permissible, the MCB must react and interrupt the circuit. For example: due to an improperly executed electrical installation, two consumers are powered via a 16 amp MCB: for instance an electric stove with an oven and a dishwasher. Let's assume that at the same time everything is turned on and a current of 32 A flows through, which is twice the 16 amps (2 times the rated current). We are talking about an overload, and the MCB must trip, because the cable cross-section of 2.5 mm 2 cannot withstand such a large current (shortening the life of the cable insulation, but also a fire can occur due to overheating). The MCB, produced according to standards, has a predetermined tripping time. In our case, this time would be somewhere between 32 seconds and a good 2.5 minutes. (see figure 3,4)

In the event of a short circuit, for instance if the phase conductor ( black or brown wire) and the neutral conductor (blue wire) come into contact, a short-circuit current of several 100 A will flow due to the very low resistance and the MCB will switch off instantly (few milliseconds).

3. Tripping Characteristic or I-t Curve of a Miniature Circuit Breaker B 10

The tripping characteristic is a property of the circuit breaker that determines how quickly the circuit breaker will cut off current when an overload or short circuit occurs.

Simply put, the tripping characteristic tells how quickly the circuit breaker will shut off the current in the event of a problem in the electrical installation. There are three main types of tripping characteristics: B, C and D. Let's take a look at characteristic B first.

Figure 3 shows the I-t or tripping characteristic of a 10 A type B MCB. If the current is 10 A or less, there is no tripping. If the current is greater than 10 A, tripping occurs, the higher the current, the faster the tripping occurs. Thus, the characteristic shows three cases of overload: 1.5 times the rated current (1.5 x I n ), 2 times the rated current (2 x I n ) and 2.5 times the rated current (2.5 x I n ).

In the case of a short circuit, where current can be between 3 to 5 times the rated current but is usually considerably higher, often over 100 A, the electromagnetic tripping unit reacts, resulting in immediate tripping.

 Figure 3: Output using the ETISON program, ETI B10 MCB, indicating that, for example, at twice the rated current, the trip time will be between 32 s and 175 s.

Table 1 displays the tripping times for various overload currents (x I n ) of a B10 MCB on Figure 3, which shows the I-t characteristic of said MCB.

Table 1: Tripping times for various overload currents (x I n ) of a B10 MCB

3. When are C and D types used?

Figure 4 shows the I-t characteristics B, C and D. We have already learned about the tripping characteristic of type B. Where is the difference compared to C and D? If we look carefully at the characteristics, we find the following: all three types work the same in the overload area - i.e. at the same time. The difference is in the operation of the magnetic or short-circuit tripping unit. In case of type B, the MCB trips immediately for currents between 3 and 5x rated current. In case of type C, the instantaneous tripping is at 5-10x rated current and in case of type D the instantaneous tripping will be at 10-20 x rated  current.

If we look at table 1, and if we had, for example, instead of B10 MCB, a C10 MCB, the instantaneous tripping (line 4 in table) would be between 50 and 100 A or greater current. And in case of a D10 MCB, there would be instantaneous tripping between 100 and 200 A or greater current. The times in case of overloads would be the same.

So, when should we use type C or type D instead of the usual type B MCB? Type C comes in handy when we intend to connect consumers with a high starting current through this protected circuit, such as asynchronous motors which could trip the MCB unnecessarily at start-up.

However, it should be noted that the MCB protects the cable, but the motor still needs adequate motor protection (bimetallic relay or a motor circuit breaker).

Type D would be suitable for protecting circuits connected to devices with significantly high inrush currents, such as transformers (variacs, welding transformers), or when switching capacitors.

                                                              Figure 4: I-t characteristics of B, C, and D MCB.

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Mk 5916s b16 16a mcb single pole fuse trip.

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• Brand Michael Kors
• eBay Product ID (ePID) 650301041

Product Key Features

• Number of Throws 1
• Suitable For Interior, Wall
• Tripping Characteristics Type B
• Current Type AC
• Control Style Switch
• Number of Outlets 1
• Operation Method On/Off
• Colour Grey
• Number in Pack 1
• Features Trip Indicator
• Mounting Style DIN Rail
• Number of Positions 1
• Number of Phases 1
• Material Plastic, ABS/Plastic
• Break Time Instantaneous
• Number of Poles 1
• Weight 118 g

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16 amp mcb tripping

Discussion in ' Electricians' Talk ' started by palmer73 , Nov 2, 2005 .

palmer73 New Member

my 16 amp mcb, is tripping due to overload, its esay to solve by not having all the appliances on at the same time, but in your opinion whats my best course of action plz?  

Trip-Lock New Member

tgs answered a similar post for you @ 3.26pm today. The advice does not change over time  

tgs New Member

Since you were a bit confused by my concise answer to your earlier post let me expand: Definitely, you are oveloading the 16A mcb, that's why it's tripping. Maybe you could swap the 16A for a 20A mcb depending upon the csa of the wire in the circuit, however, the 20A mcb would still trip as often as the 16A one did so it wouldn't matter. Since the solution is in the provision of extra circuit(s) on different mcb(s) and this is notifiable under Part P then yes you need to look at yellow pages for a registered electrician.  

yes, your right mate, he did,sorry to bother you, i was just interested in other opinions thats all, as get the yellow pages out doesnt really educate me on the subject.thanks anyway.  

part-p.org.uk New Member

If you assume that your supply voltage is 240 Volts and the breaker will operate if a current in excess of 16 amps is flowing then you appliances must be demanding at least 240 x 16 Watts. A total of 3840 or 3.8 Kw. Now go and check the ratings plates on all the appliances you are using on this circuit. Add up the total demand and if it exceeds 3.8 Kw then the MCB is doing its job - disconnecting the supply to protect the circuit from overload. If you are overloading the circuit then you need to have the circuit uprated - cable and mcb - or decrease demand. If you do not think you are overloading the circuit then you may have a fault in an appliance, the cable or the MCB. Either way you should really get someone in to inspect and test the circuit and recommend an appropriate solution.  

ty "get it done" thats the kind of helpful info i was after, ty very much, i will work out my ratings , and go from there, once again thank you very much.  

Ripped Off New Member

Now go and check the ratings plates on all the appliances you are using on this circuit. Add up the total demand and if it exceeds 3.8 Kw then the MCB is doing its job - disconnecting the supply to protect the circuit from overload. If you are overloading the circuit then you need to have the circuit uprated - cable and mcb - or decrease demand. This still would not be fully correct as the regs give diversity for MCB sizing. FLC's are not used in every instance to size the MCB. What exactly is been run on off this MCB? Has new load been added to the circuit? If so what is it Is the tripping increasing in frequency. Could be a sign of something failing Sorry if I missed the original thread & these have been suggested already.  

hi, on this mcb, is 2 fridges, 1 chest freezer, 1 dishwasher, 1 washing machine, 1 tumble dryer, 2 small fish tank appliances, and a couple of security lights This is what is being used on a 16A mcb. What kind of security lights? They wouldn't be the 500W halogen variety by any chance. I really don't think the problem is a faulty appliance.  

......... with an extension lead feeding the christmas tree lights in the city centre as well  

l00pd0g New Member

Now go and check the ratings plates on all the appliances you are using on this circuit. Add up the total demand and if it exceeds 3.8 Kw then the MCB is doing its job - disconnecting the supply to protect the circuit from overload. If you are overloading the circuit then you need to have the circuit uprated - cable and mcb - or decrease demand. This still would not be fully correct as the regs give diversity for MCB sizing. FLC's are not used in every instance to size the MCB. What page? What exactly is been run on off this MCB? Has new load been added to the circuit? If so what is it Is the tripping increasing in frequency. Could be a sign of something failing Sorry if I missed the original thread & these have been suggested already.  

Re: 16 amp mcb tripping Posted: Nov 2, 2005 9:34 PM Reply .........with an extension lead feeding the christmas tree lights in the city centre as well not entirely true, but o so funny, had me crying, lol  

I didn't meean to be nasty or condescending in my previous replies. Its just that the answer is very obvious and you basically got it correct. No doubt you have been getting an earful about this but you don't want to take the step that you yourself suggested. I wouldn't bother reading all the plates. The three appliances (dishwasher, tumble dryer and washing machine) are perfectly capable of taking out a 32A mcb let alone a 16A or 20A. So even a 32A ring main to power these might not be free from tripping. The freezers and fridges (not to mention the lights) also have at least a small possibility of causing trips on a 16A (due to inrush current) What you need is what you said and I confirmed for you. Get out the yellow pages, ask friends for recommendations, get several quotes and see where you are then. If you have a problem interpreting the quotes (I would be surprised if they all suggested the same solution) then come back to the forum.  

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What are trip switches? Safety circuit breakers

Table of Contents

• What is a trip switch?
• GFCI Breaker
• Trip switch tripping and won’t reset?
• How often should trip switches be replaced?
• Can trip switches be mixed?
• Is there a trip switch for a power surge?

August 2024

1) What is a trip switch?

A TRIP SWITCH is a device that is contained inside an electrical enclosure such as a consumer unit , fuse box , or electrical panel.

The trip switch can take various different forms and can perform a variety of tasks dependant upon type. 

These safety switches are responsible for shutting off the power supply when an electrical fault develops in the wiring system. The fault could be faulty electrical appliances, a short circuit, an earth fault, damage to electrical wiring or other electrical issue.

2) Trip switches VS Circuit Breakers

A circuit breaker is a type of trip switch. There are many types of trip switch such as:

• GFCI (Ground Fault Circuit Interrupter)
• AFCI (Arc Fault Circuit Interrupted)
• MCB (Miniature Circuit Breaker)
• RCD (Residual Current Device)
• RCBO (Residual Current Breaker with Overload)
• AFDD (Arc Fault Detection Device)

The GFCI detects any electrical current that leaks to earth. The device is very sensitive and will trip when there is electrical current missing in the realms of 4-6mA. That’s milli amps, a very tiny electrical current. 

The device is intended to protect us from electric shocks. 

2.2) GFCI Breaker

This is a GFCI device with an overload element attached so the device will trip when residual currents leak to earth, when there is electrical overload and when short circuits occur. 

This device protects against dangerous electrical arcing situations on the electrical circuit wiring and any connected appliances.

The miniature circuit breaker offer protection against Line (HOT) – Neutral Shorts and Line – Earth Faults of sufficient magnitude. Minor electrical earth faults will not cause an MCB to trip.

This device is similar to a GFCI but its typical operating current in domestic premises is 30mA, around 5 times more than a GFCI.

The device will offer protection against electric shocks. The RCD offers NO protection against short circuits or overload. 

The RCD can fail if its rated current is exceeded. 

This device offers all the benefits of the RCD device, short circuit protection and overload protection. 

An AFDD is an RCBO with Arc Fault protection built in. This is the latest technology in 2024 in the UK for a modern fuse board or consumer unit installation. 

3) Trip switch tripping and won’t reset?

If you have a trip switch that is tripping and will not reset, the first thing to do is to unplug all the appliances from each different circuit in the house or property. Make sure you locate each of the power points at the wall. A faulty appliance can cause switches to trip into their off position.

The most common culprits are the kitchen appliances. A tumble dryer is a regular problem for causing a switch to trip so make sure you unplug this appliance as well. 

Take care when attempting to investigate faults on electrical circuits, electrical shock can occur easily without seeking the help of a qualified electrician. 

If you have unplugged all the devices that are in your property and the trip switch will still not reset, then try this article for further help.

4) How often should trip switches be replaced?

Trip switches will normally last around 15-25 years in most cases. A lot depends upon how extensively used the electrical system is.

If there is a continuous and large flow of electricity due to high power demands in the electrical system then trip switches can wear out more quickly. 

5) Can trip switches be mixed?

Generally speaking, no. Trip switches from one manufacturer should not be mixed with those from a different manufacturer unless permission can be sought to do so. 

The manufacturer of the main consumer unit or electrical enclosure should be contacted in order to check that different equipment can be installed in their enclosure. Permission is rarely forthcoming unless they happen to manufacture several compatible brands. 

6) Is there a trip switch for a power surge?

No. Most surge protection devices (SPD) currently on the market in 2024 do not shut off the electricity supply in the event of a power surge. They divert excess voltage to earth and in some way stabilise the incoming voltage by eliminating spikes in the supply. 

There are various types available such as those that sit in extension power strips or that sit at the main consumer unit or electrical panel. 

The SPD is often now installed at the main panel to protect the whole installation. This saves having an SPD on every appliance or extension lead/power strip. 

A TRIP SWITCH is a necessary device for electrical installations and without them, we would rely solely on fuses or fuse wire to disconnect the electrical supply in the event of a fault. 

There are various types of trip switch, each of which provides a different purpose. The most modern and up to date trip switches provide the best protection. Whilst installing a consumer unit onto an old system is not always suitable for older wiring, the advances in technology over fuse wire type fuse boxes are remarkable. 

Trip switches are here to stay and are only getting better, providing extra safety for homes and business throughout the globe.  

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About the author

Paul Higgins

Electrician, qualified supervisor and electrical tutor.

Paul is an English writer who is also heavily involved in the Electrical Industry. Not only a Fully Qualified Electrician but also an Electrical Assessor and Tutor. He has Gas Qualifications and many additional Electrical Qualifications.

With a keen interest in the engineering of our built world and especially all things Electrical, he enjoys writing about such topics. 

“There are few phenomena more interesting than how this invisible force powers our homes and businesses, provides light and movement through something that has no smell, no sound and no visible form.”

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• Electrics UK

Circuit breakers

• Thread starter jstrong
• Start date 29 Jun 2012

• 29 Jun 2012

I have a range of circuit breakers in my MK consumer unit which include B40, B32 B16 & B6. Would I be right in thinking that the B40 would be the correct breaker for 10mm cable supplying a cooker or Induction hob? Would the B32 be correct for supplying a kitchen ring or other ring main? Would the B16 be for lighting a lighting radial? What about the B6? Any help appreciated.  

Is this consumer unit actually installed and you are trying to identify circuits ?  

ban-all-sheds

Hmmm...... //www.diynot.com/forums/electrics/cable-size.294616/ //www.diynot.com/forums/electrics/rewiring-a-kitchen.294815/ //www.diynot.com/forums/electrics/wiring-query.296653/  

jstrong said: Would I be right in thinking that the B40 would be the correct breaker for 10mm cable supplying a cooker or Induction hob? Click to expand...

Would the B32 be correct for supplying a kitchen ring or other ring main? Click to expand...

Would the B16 be for lighting a lighting radial? Click to expand...

What about the B6? Click to expand...

Do you think that was wise?  

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Similar threads

• musashi79uk
• 29 Feb 2024
• richard1600

• Perm Krai /
• Detailed maps /

Detailed Road Map of Perm

This is not just a map. It's a piece of the world captured in the image.

The detailed road map represents one of several map types available. Look at Perm, Perm Krai, Urals, Russia from different perspectives.

Get free map for your website. Discover the beauty hidden in the maps. Maphill is more than just a map gallery.

• Free map
• Panoramic 64
• Location 108

The default map view shows local businesses and driving directions.

Terrain Map

Terrain map shows physical features of the landscape. Contours let you determine the height of mountains and depth of the ocean bottom.

Hybrid map combines high-resolution satellite images with detailed street map overlay.

Satellite Map

High-resolution aerial and satellite imagery. No text labels.

Maps of Perm Krai

This detailed map of Perm is provided by Google. Use the buttons under the map to switch to different map types provided by Maphill itself.

See Perm Krai from a different perspective.

Each map style has its advantages. No map type is the best. The best is that Maphill lets you look at the whole area of Perm from several different angles.

Yes, this road detailed map is nice. But there is good chance you will like other map styles even more. Select another style in the above table and look at the Perm from a different view.

What to do when you like this map?

If you like this map of Perm, Perm Krai, Urals, Russia, please don't keep it to yourself. Give your friends a chance to see how the world converted to images looks like.

Share this detailed map.

Use the buttons for Facebook, Twitter or Google+ to share a link to this Perm detailed map. Maphill is the largest map gallery on the web. The number of maps is, however, not the only reason to visit Maphill.

Free detailed map of Perm.

This road detailed map of Perm is available in a JPEG image format. You can embed, print or download the map just like any other image. Enrich your website with hiqh quality map graphics. Use the Free map button above the image.

Is there anything more than this map?

Sure there is. It has been said that Maphill maps are worth a thousand words. But you can experience much more when you visit Perm.

Be inspired.

Perm represent just small part of Perm Krai, but still it has a lot to offer and a lot to see. It is not possible to capture all the beauty in the map.

Discount hotel reservations.

If any of Maphill's maps inspire you to come to Perm, we would like to offer you access to wide selection of hotels at low prices and with great customer service.

Thanks to our partnership with Booking.com you can take advantage of up to 50% discounts for hotels bookings in many towns and cites within the area of Perm.

Perm hotels

See the full list of destinations in Perm , browse destinations in Perm Krai , Urals , Russia , Asia or choose from the below listed cities.

• Hotels in Perm »
• Hotels in Perm Krai »
• Hotels in Urals »
• Hotels in Russia »
• Hotels in Asia »

Hotels in popular destinations in Perm

• Perm' hotels »
• Kondratovo hotels »
• Ferma hotels »
• Yuzhnyy hotels »
• Bol'shaya Mos' hotels »
• Nizhnyaya Kur'ya hotels »
• Kostoryata hotels »
• Turbina hotels »
• Gayva hotels »
• Ogryzkovo hotels »
• Soboli hotels »
• Khemeli hotels »
• Safrony hotels »
• Gileva hotels »
• Zaosinovo hotels »

Learn more about the map styles

Each map type offers different information and each map style is designed for a different purpose. Read about the styles and map projection used in the above map (Detailed Road Map of Perm).

Detailed street map and route planner provided by Google. Find local businesses and nearby restaurants, see local traffic and road conditions. Use this map type to plan a road trip and to get driving directions in Perm.

Switch to a Google Earth view for the detailed virtual globe and 3D buildings in many major cities worldwide.

Mercator map projection

This map of Perm is provided by Google Maps, whose primary purpose is to provide local street maps rather than a planetary view of the Earth. Within the context of local street searches, angles and compass directions are very important, as well as ensuring that distances in all directions are shown at the same scale.

The Mercator projection was developed as a sea travel navigation tool. It preserves angles. If you wish to go from Perm to anywhere on the map, all you have to do is draw a line between the two points and measure the angle. If you head this compass direction, and keep going, you will reach your destination.

Popular searches

A list of the most popular locations in Russia as searched by our visitors.

• Martynovsky District
• Lake Baikal
• Kursk Oblast
• Yenisei River
• Krasnoyarsk
• Ural Mountains
• Kabardino-Balkarian Republic

Recent searches

List of the locations in Russia that our users recently searched for.

• Bol'shaya Martynovka
• Tomsk Oblast

The Maphill difference

It's neither this road detailed map nor any other of the many millions of maps. The value of a map gallery is not determined by the number of pictures, but by the possibility to see the world from many different perspectives.

We unlock the value hidden in the geographic data. Thanks to automating the complex process of turning data into map graphics, we are able to create maps in higher quality, faster and cheaper than was possible before.

Forever free

We created Maphill to make the web a more beautiful place. Without you having to pay for it. Maphill maps are and will always be available for free.

Real Earth data

Do you think the maps are too beautiful not to be painted? No, this is not art. All detailed maps of Perm are created based on real Earth data. This is how the world looks like.

Easy to use

This map is available in a common image format. You can copy, print or embed the map very easily. Just like any other image.

Different perspectives

The value of Maphill lies in the possibility to look at the same area from several perspectives. Maphill presents the map of Perm in a wide variety of map types and styles.

Vector quality

We build each detailed map individually with regard to the characteristics of the map area and the chosen graphic style. Maps are assembled and kept in a high resolution vector format throughout the entire process of their creation.

Experience of discovering

Maphill maps will never be as detailed as Google maps or as precise as designed by professional cartographers. Our goal is different. We want to redefine the experience of discovering the world through the maps.

Fast anywhere

Maps are served from a large number of servers spread all over the world. Globally distributed map delivery network ensures low latency and fast loading times, no matter where on Earth you happen to be.

Spread the beauty

Embed the above road detailed map of Perm into your website. Enrich your blog with quality map graphics. Make the web a more beautiful place.

Maphill is the web's largest map gallery.

Get a free map for your website. Explore the world. Discover the beauty hidden in the maps.

Map graphics revolution.™