HƯỚNG DẪN cách lựa chọn aptomat chống giật cho hộ gia đình

Currently, almost 99.99% of households in Vietnam use electricity using this energy source. The convenience of electricity is many, but it also has many potential risks, which can cause death when electrocuted. The optimal solution to minimize the danger during the process of using electricity is to install an anti-shock circuit breaker. The question is, which brand of anti-shock circuit breaker should we equip, what type of anti-shock circuit breaker should we choose with appropriate specifications, what is their effectiveness, etc. Today, we invite you to read with Dien Phan Khang to learn and fill these worries.

Anti-shock ace for household use

1. What is an anti-shock circuit breaker?

Anti-shock circuit breaker is also known as anti-shock circuit breaker, anti-shock circuit breaker, anti-leakage circuit breaker, anti-leakage circuit breaker… Similar to regular circuit breaker, anti-shock circuit breaker has the following types:

• RCCB (Residual Current Circuit Breaker) anti-shock circuit breaker.
• The shrimp-shaped anti-shock circuit breaker has RCBO (Residual Circuit Breaker with Overcurrent protection) overload protection.
• The block-shaped anti-shock circuit breaker has ELCB (Earth Leakage Circuit Breaker) overload protection.

The anti-shock circuit breaker (anti-shock circuit breaker) has the function of cutting off electricity when there is an electric current leaking to the ground or someone is electrocuted.

In addition, ELCB and RCBO anti-shock circuit breaker also has the same overload protection function as regular circuit breaker. Meanwhile, RCCB only has the function of preventing leakage current, needing to be combined with MCB for overload protection. RCCB + MCB = RCBO.

2. Function of anti-shock Aptomat

The anti-shock circuit breaker will disconnect the power source when there is leakage current due to an incident or someone touches the power source

• 30mA – leakage current threshold protects against direct contact with current
• 300mA – leakage current threshold can be used for indirect contact protection and protection against fire hazard due to small current leakage.

1-phase anti-shock circuit breaker + N: it compares the current flowing through 2 wires: ground wire and fire wire. If this current differs beyond a certain leakage threshold, it will disconnect power from the load, not allowing the load to work anymore. Manufacturers often design leakage thresholds of 15mA, 30mA, 100mA, 200mA, 300mA, 500mA.

3-phase anti-shock circuit breaker + N: it compares the current flowing through the 3 phase wires and the neutral wire. If this current differs beyond a certain leakage threshold, it switches off.

3. Structure and operating principle

3.1. Anti-shock circuit breaker for 1 phase + N:

People give 2 wires: The cool wire and the fire wire go through a current transformer with a toroidal iron core, this is a regular toroidal core transformer with a primary coil of 1 wire turn (which is 2 cool and fire wires going through the center of the transformer) and a secondary coil of a few dozen turns of wire, this transformer is about the size of a wedding ring.

As we know: the currents going out from the hot wire to the cool wire (and vice versa: from the cool wire to the hot wire) are in opposite directions, which means that the changing magnetic fields they create in the iron core of the current transformer are in opposite directions. If these two currents are equal, the two changing magnetic fields will cancel each other out, making the output voltage of the current transformer secondary coil = 0.

If the voltage through the two wires is leaky, the current on the two wires is different, two different magnetic fields are generated in the iron core, causing an induced current to appear on the secondary coil of the current transformer. This current is fed into the IC to check if it is greater than the safe leakage current?

If greater than 15mA, for example, the IC will supply power to the Triac to power the Aptomat’s suction coil. To detect large leakage currents of several hundred mA, there is no need to use an IC (because the IC circuit is complex and high cost), but immediately use the electromagnetic force created when current flows in the coil to turn on and off the circuit breaker.

3.2. Anti-shock circuit breaker for 3-phase 3-wire electricity

Similar to above with 3 phase wires passing through the center of the current transformer.

3.3. Anti-shock circuit breaker for 3-phase 4-wire electricity

Similar to above with 3 phase wires and neutral wire going through the center of the current transformer.

Diagram of the operating principle of the anti-shock Aptomat

4. Technical specifications of anti-shock Aptomat

Anti-shock circuit breakers are divided into two basic types: those with only anti-shock function (RCCB) and those with overload protection function (RCBO, ELCB). Depending on each type, there may be all or some technical specifications as follows:

In: Rated current In = 100A, when the current is greater than 100A the circuit breaker will operate.

Leakage current: Anti-shock circuit breaker is usually made with fixed leakage current at 15mA, 30mA or adjustable leakage current at 100mA / 200mA / 300mA / 500mA (with a lever to select the corresponding leakage current level). When the leakage current exceeds the above leakage current, the anti-shock circuit breaker will operate.

Ue: Rated working voltage.

Icu: Short-circuit breaking current is the contact’s ability to withstand the maximum current in 1 second.

Icw: Ability to withstand short circuit current in 1 unit of time.

Ics: actual cutting ability when a device failure occurs. This ability depends on each manufacturer due to different manufacturing technology.

AT: Ampere Trip (active current).

AF: Frame Amp (frame current).

Mechanical/electrical endurace: Number of mechanical switching times allowed / number of electrical switching times allowed.

5. Shape of the anti-shock Ace

The anti-shock circuit breaker has the same shape as a regular battery but is the same size or slightly larger.

In addition to the ON-OFF switch, the anti-shock aptomat also has an additional TEST button next to it to check if the aptomat is working well.

On the surface of the anti-shock circuit breaker, the following parameters are recorded: voltage, load current, impact time and leakage current. Normally there are leakage current thresholds of 15mA, 30mA, 100mA, 200mA, 300mA, 500mA.

6. Instructions for choosing anti-shock circuit breaker

When choosing an anti-shock Aptomat, you need to pay attention to the following issues to avoid making the wrong choice and not being able to use it:

1 Choose the type of circuit breaker: Anti-shock circuit breaker with overload protection function (RCBO, ELCB) can be used to replace regular circuit breaker, but because of its more complex structure, this type usually has low short-circuit current. Using RCBO, ELCB after the circuit breaker will often protect the electrical system better. Aptomats with only anti-shock function (RCCB) are required to be installed after regular aptomats.

2 Choosing the number of phases / number of poles: The most common mistake is choosing a 3-phase (3-pole) anti-shock circuit breaker installed for a mixed load 3-phase system (1-phase load, 3-phase load, neutral use) leading to the anti-shock circuit breaker jumping.

For mixed 3-phase loads, a 4-phase anti-shock ace (also known as 3-phase 4-pole, 3P + N) must be used. For single-phase electricity (1 phase wire + 1 neutral wire), a 2-phase circuit breaker must be used (1 phase 2 poles, 1P + N). 3-phase 3-pole anti-shock ace can only be used for 3-phase 3-wire loads without neutral like 3-phase motors.

3 Select rated current: For RCBO, ELCB selects rated current based on used capacity similar to choosing normal AC. For anti-shock switches without RCCB overload protection, choose a rated current equal to or greater than the rated current of the switch normally installed with the RCCB.

4 Choose leakage current: Anti-shock aces usually have 3 types according to leakage current 15mA, 30mA, 100/200/500mA. Normally, small systems and residential areas use 30mA leak-proof circuit breaker. High-capacity production areas often use 100/200/500mA leak-proof circuit breaker.

7. How to install anti-shock circuit breaker

Step 1: Disconnect the power source and electrical system in the installation space

Step 2: Screw the anti-shock circuit breaker into the electrical cabinet or electrical panel, with a cover.

When screwing, you should screw firmly and carefully so as not to loosen while using electrical equipment. and place the line head at the top, the load head at the bottom

Step 3: Wiring to the anti-shock circuit breaker:

When wiring the anti-shock circuit breaker, the AC source is attached to the beginning of the line, the output is attached to the load on the load poles.

Do not install it backwards because it will easily cause an electrical fire and is dangerous for the user.

The hot wire must be connected to pin L, the cold wire to pin N.

Step 4: Complete installation:

After installing the anti-shock circuit breaker, you should not subjectively use it, but need to check the electrical system to see if the anti-shock circuit breaker is working and adjust it in a timely manner.

8. Notes when using anti-shock Aptomat

Do not use in wet places. If you install an anti-shock circuit breaker for the water heater, you should place it outside the bathroom.

Must test before use. Test at least once a month to check if the device is still working well?

When connecting an anti-shock circuit breaker, above is the input voltage, below is the load output voltage. If connected in reverse, the circuit breaker will die as soon as there is current.

9. What kind of anti-shock circuit breaker is good?

On the market today, there are many brands of electrical equipment that produce anti-shock AC products.

There are types of very good quality but, there are also types whose quality does not meet the requirements according to the standards set for anti-shock CB lines. The question is how users can choose good quality, safe products for themselves and their family members at reasonable prices.

Below we would like to offer 3 lines of anti-shock CB products that we believe can be used. Readers can refer to it!

Schneider anti-shock circuit breaker

Highly appreciated by experts and users for its quality, high safety and accuracy.

Schneider anti-shock CB products come from a French electrical equipment manufacturing group that has achieved many international quality certificates as well as undergone an extremely rigorous testing process before reaching consumers.

The price of Schneider anti-shock CB products is quite high, but besides that, it also means that the product quality is very good.

Schneider anti-shock ace

Panasonic anti-shock circuit breaker

Panasonic anti-shock CB in particular and electrical equipment products from this brand in general have extremely good quality, durability and high safety.

The product uses a leakage current sensor researched and developed by Panasonic with high sensitivity and accuracy. The response time of the device is small, making it safe for users.

Panasonic anti-shock ace

Sino anti-shock circuit breaker

Not as highly rated as the two anti-shock circuits mentioned above, Sino brings peace of mind to users because of the quality of the product, sophisticated design, variety of styles, but also integrates for users many different functions including: anti-leakage; anti-shock; overload protection.

As a brand for all projects, Sino anti-shock cb will be a great choice for small families with extremely attractive quality and price.

SINO anti-shock ace

Thank you for reading the article.

10. Additional information about anti-shock circuit breaker and anti-shock circuit breaker

1. INSTRUCTIONS on how to choose an anti-shock circuit breaker for your household
2. Should you use an anti-shock Aptomat for your home’s electrical system?
3. The difference between two types of anti-shock and anti-leakage CB
4. Instructions on how to correctly connect a Schneider anti-shock CB are extremely simple
5. Instructions on how to test anti-shock CB most accurately and safely
6. Tell you how to fix the anti-shock CB when it jumps continuously
7. What is an anti-shock circuit breaker? Should I install an anti-shock circuit breaker for my family?
8. Gain experience in purchasing anti-shock aptomat that suits your needs
9. How much does the anti-shock block circuit breaker cost? Is it expensive?
10. 5 reasons Schneider anti-shock circuit breaker is always “BEST CUSTOMERS”
11. 10 reasons you should choose RCBO Schneider anti-shock CB Aptomat
12. Compare 1-phase and 3-phase Schneider RCBO anti-shock circuit breaker
13. How many types of Schneider anti-shock circuit breakers are there?
14. What is an anti-shock block circuit breaker? Which type should I use?
15. Important anti-shock circuit breaker parameters to know
16. How should I choose an anti-shock Aptomat?
17. Anti-shock circuit breaker: How to choose and how to install
18. Which type of anti-leak circuit circuit breaker is good and highly safe?
19. What is an anti-shock circuit breaker? Structure and operating principle of anti-shock Aptomat
20. Important anti-shock circuit breaker parameters to know
21. Need to buy Genuine and Reputable Schneider Anti-shock Circuit Breaker at Cheap Price in HCMC