Turvakytkin

Our staffs of Manhua Electric have over thirty years of experience in the production and export of electrical products. Our main products include switchboards, automatic transfer switches (ATS), circuit breakers, contactors, lightning arresters, photocells and timers. Starting in 2017, we started operating a warehousing center in Chicago, USA. As a supplier of United Nations tender projects, we have been participating in power construction projects in overseas markets.

01/

02/

We ensure that all production processes are carried out in accordance with the ISO9001 system, and all products have passed CE certification, and some products have also passed UL and VDE certification.

03/

04/

We sincerely welcome all customers who come to inquire about our products, and provide professional product knowledge and technical guidance, as well as complete warranty and after-sales services.

30A turvakytkin

Safety switches are also known as "disconnect switches" or "load break switches", which are required for power outlets in home and caravan parks. They protect people from electric shock by turning off the electricity within milliseconds of detecting a current leak. This can happen if a faulty power point, wiring or electrical appliance is being used. But they are considered a back-up and don't prevent all electric shocks.

These switches can be used with fuses, and they offer recessed "ON" and "OFF" indicators on both the handle and door, as well as easy-to-maintain zipper models.

Switchboard-Mounted Safety Switches
This type of safety switch is the device required by law to be fitted to the power and lighting circuits of new homes. They are located alongside circuit-breakers in the home's switchboard, and can be distinguished from circuit breakers by the presence of a button marked "test", which is located on the front face of the device.

Used in residential, commercial and light industrial applications, these switches are load-break rated and suitable for light-duty motor circuits and service entrance applications, unless otherwise noted.

Heavy-Duty Safety Switch
Used in commercial, institutional and industrial applications where reliable performance and service continuity are critical, these switches are most often rated 30 – 1200A with a visible double-break rotary blade mechanism. All heavy-duty switches are load-break rated. For added safety, Eaton's interlocking mechanism ensures the door cannot be opened when the handle is in the ON position; however, a built-in defeater mechanism provides user access when necessary.

Heavy-Duty Switches Pin and Sleeve Receptacle
Pre-wired and interlocked to polarize receptacles for three-phase, three-wire grounded type power plugs, receptacle switches are used for portable power applications such as welders, infrared ovens, batch feeders, conveyors and truck and marine docks.

Heavy-Duty Safety Switches with Surge Protection

Heavy-Duty Safety Switches with Shunt Trip

Used to transfer service from a normal power source to an alternate source, or to switch from one load circuit to another, these safety switches have two interlocked switches with a common connection. The design ensures both switches cannot be closed at the same time, preventing them from being operated in parallel. Double throw switches are offered in general duty, heavy-duty and quick-connect options. Eaton's stacked switch design (available for a variety of fusible units) reduces not only wall space requirements, but also overall installation cost by reducing the number of fuses required (three fuses instead of six for a 3-pole device).

(1)Try to reset the switch by flicking it back to the ON position. Sometimes the issue is temporary and the safety switch will reset easily. However, if the problem is recurring get a licenced electrician to take a look at it.

(2)If the switch does not reset unplug all the appliances (if on the power circuit) or turn off all lights (if on the light circuit). Appliances must be unplugged, simply turning off at the power point is not enough. Don't forget the hidden power points like the one behind the fridge, washing machine, or dishwasher as well as any outdoor appliances which may be plugged in.

(3)Reset the switch. If the safety switch still fails to reset avoid touching it and any electrical systems and call a licenced electrician as soon as possible.

(4)Once the switch is reset, plug your appliances back in one at a time. Usually, the faulty appliance will cause the safety switch to trip once it's plugged in and turned on clearly identifying the culprit.

(5)Make sure that power points that could be experiencing overload are not reconnected. Spread the appliances across several sockets or ask your electrician to install a new power point.

(6)For your safety do not use the faulty appliance until it has been checked and fixed by an appliance repair technician.

Some machines are more dangerous than others and need to be protected by safety equipment with a safety categorization of Category 2, 3 or 4. Category 2 or 3 is based upon whether the machinery has the potential of inflicting non-life threatening injuries such as a cut or bruise. Category 4 is for more dangerous machinery that has the potential to inflict more serious life threatening injuries, decapitation or loss of limbs. It is important to know which category your machinery falls under.

We have various cable input lengths to choose from which range from 3 to 10 metres. Or we have QD connector versions which have a socket for use with separate plug in cables. Or finally we have the LQD version which is a leaded connector device version. LQD connectors are generally used on the smaller safety switches and have a input cable which is around 150mm and a plug-in connector attached to it.

There are safety switches in ABS (Acrylonitrile butadiene styrene) or stainless steel grade 316 versions, both are sealed to IP67 making them fully resistant to dust and water. If you're looking for a non-contact safety switch for the food industry then we'd recommend the stainless steel version.

●Less prone to overheat – The stainless steel body acts like a heat-sink
●Stronger fixing holes – ABS version can be over-tightened and damaged on install

We offer various contact configurations for each type of safety switch ranging from a 1 normally open contact to 2 normally open and 1 normally closed.

The voltage range that we offer on our website is predominantly 24V DC which is the most popular choice for machine safety in the UK. If you need another voltage such as 110V AC or 230V AC we can offer this in many. The current ratings vary from 0.2 amps to 3 amps but if you need something with a higher current rating, we'll see what we can offer.

Do you currently use another brand but want a more economical solution? We have cross references available on most of our product listings that compares, have the same dimensions and fixing centres so changing is simple and saves you money – savings as much as 35% can be achieved on some models!

750VDC 250a 4p MCCB DC Molded Case Circuit Breaker

Adjustable Moulded Case Circuit Breaker MCCB

Electrical Single Light Switch 1 Gang Double Way

DSC_6300(001) DSCF9020(001) DSCF9035(001)

A: On a normal power circuit, the current flowing to an appliance returns through the neutral wire. If the circuit is compromised, the electricity can leak to earth through a person in contact with the appliance, causing death or serious injury. A safety switch detects the loss of power from the circuit, and cuts the supply of electricity in as little as 30 milliseconds – 0.03 seconds. Importantly, this response time is faster than the critical section of a heartbeat, and therefore significantly reduces the risk of death or serious injury.

A: Many homes have safety switches on the power outlet circuits, and some have safety switches on the lighting circuits. But in most homes, other circuits such as pools, air-conditioners, hot water systems, and stoves are not protected. For the highest possible level of protection, you need a safety switch on every circuit. A safety switch should always be considered a secondary safety response; it is not a substitute for good old-fashioned common sense around electricity. A person who receives an electric shock from a circuit protected by a safety switch may still feel the current for an instant, and experience pain and shock. However, they are much more likely to survive than they would if the circuit was unprotected.

A: Under the current standard, a safety switch is manufactured to last for a period of 4,000 tests. We encourage home owners to test their switches every three months which indicates that unless there is a significant problem with a device, they should last a lifetime.

A: General duty safety switches are used in residential and commercial applications. They are suitable for light duty motor circuits and service entrance applications. Fusible cartridge and non-fusible switches are available.

A: Safety switches should be installed on each sub-circuit, including any that supply fixed electrical equipment like hot water heaters and air-conditioners. In addition, the operation of the safety switch must not be affected by electrical equipment connected to the circuit that may distort the AC waveform.

A: Generally speaking, switchgear testing should be completed semi-annually with a visual inspection and infrared completed annually. There may be some factors that would warrant more frequent testing, such as equipment issues or deterioration, manufacturer defects, or high reliability requirements.

A: Safety switches can prevent electrocution that could be harmful or potentially fatal with no safety measures in place. During electrical leaks, overloading, short-circuiting, or other problems in the electrical system, safety switches will detect abnormalities and automatically shut off the electricity immediately. However, safety switches only work if they are connected to the faulty circuit and are working properly

A: By law, safety switches for power points and lighting circuits must be installed in new homes and buildings where electrical circuits are added or altered. A safety switch quickly turns off the electricity supply if an electrical fault is detected. They are considered a back-up and don't prevent all electric shocks.