What is dual power transfer switch?

Most professionals in the electrical industry are well-acquainted with the concept of dual power transfer switch. However, when it comes to understanding the functions and applications of dual power transfer switch, many electrical experts may be familiar with one aspect but not the others. In fact, some may not be aware of all the nuances surrounding this topic.

Dual power transfer switch are generally used in places where power outages are not allowed and in particularly important power consumption occasions (for example, the communication center computer room has at least three power supplies, one DC UPS power supply, one or two mains power supplies, and one diesel generator set). Such as power plants, banking and securities industries, electronics and semiconductor manufacturing plants, telecommunications and network data centers, hospitals, airports, transportation, and fire-fighting equipment. When selecting, generally choose PC-level ATS. PC-level ATS is small in size, has fast switching time, and can withstand short-term short-circuit current. So what are the specific functions and uses of the dual power switch? The following article will tell you about it in detail. After reading the article, I hope it can give the majority of electrical personnel a deeper understanding of dual power transfer switch.

Automatic transfer switching equipment, hereinafter referred to as Dual Power Automatic Transfer Switch, commonly known as dual power transfer switch, its function is to provide the load with conversion of two power supplies. When one power supply is abnormal, the load can be connected to the other power supply. The logo is as follows:

In the current economic environment, for particularly important loads and second-level loads, the application of Dual Power Automatic Transfer Switch is very common and very important components. For third-level loads, users can also increase backup by evaluating the economic losses caused by power outages. Power supply. It can be seen that Dual Power Automatic Transfer Switch is widely used in the field of power distribution.

Functional features of dual power automatic transfer switch:

There are reliable mechanical interlocking devices and electrical interlocking protection between the two circuit breakers, which completely eliminates the possibility of closing the two circuit breakers at the same time. It adopts double-row composite contacts, transverse mechanisms, micromotor pre-energy storage and microelectronics. The control technology basically achieves zero arc (no arc extinguishing cover), has obvious switch position indication and padlock function, reliably realizes the isolation of power supply and load, has high reliability, and has a service life of more than 8,000 times. Mechatronics design ensures accurate switch conversion. Flexible, reliable, strong electromagnetic compatibility, strong anti-interference ability, no external interference, and high degree of automation.

The dual power automatic transfer switch has short circuit and overload protection functions, automatic transfer functions for overvoltage, undervoltage, and phase loss, and intelligent alarm functions. The automatic conversion parameters can be set freely externally, and it has an intelligent protection function for the running motor. When the fire control center sends a control signal to the intelligent controller, both circuit breakers enter the open state and reserve computer networking interfaces to realize the four remote functions of remote control, remote adjustment, remote signaling, and telemetry.

The fully automatic type does not need to connect any other external control system components. It has a beautiful appearance, small size, and light weight. The logic control board uses different logic to manage the actions of the motor and gearbox that can be directly installed in the switch. Operate to ensure the position of the electronic switch. The motor is a polychloroprene rubber material insulated moist heat type motor. It is equipped with various safety production devices. It will trip when the temperature exceeds 110℃ and the overcurrent changes state. After the fault phenomenon disappears, it will automatically learn to join the society. Working, reversible reduction gear adopts spur gear.

Reason for power outage:

Power outages are generally divided into planned maintenance outages and accidental power outages. If the load circuit is undergoing electrical maintenance, it is normal maintenance and measures can be taken to avoid or reduce losses. If an accidental power outage occurs for some important loads, it may affect the safety of personal life, the production process, and the safety of production equipment, such as running elevators, building ventilators, high-speed subways, and furnaces in steel plants.

Voltage anomalies also have a great impact on electrical equipment. For example, if a motor runs at low voltage for a long time, the motor will heat up severely and even burn the motor; if there is a lack of phase, it will cause the motor to heat up seriously and shake seriously. Affects the reliability of motor operation; overvoltage will also cause accelerated aging of circuits; and some precision equipment has higher requirements for voltage stability and frequency.

Dual Power Automatic Transfer Switch can effectively respond to power outages and voltage abnormalities, provide reliable and high-quality power supply to the load, and ensure the safe operation of the load. So what functions does Dual Power Automatic Transfer Switch have?

1. Classification of controllers

In the GB/T 14048.11-2016 standard, controllers can be divided into：

ATSE controller classification

(1).Basic type

Detects (common and backup) power supply voltage loss or any phase failure, and issues a conversion command.

(2).Standard type

Detects (common and backup) if the power supply loses voltage or breaks any phase, and has an under-voltage detection function and issues a conversion command.

(3). Generator set type

The backup power source is a generator set, which detects loss of voltage, phase failure, or undervoltage in the power supply (common and backup) and issues a conversion command.

(4). Fire-fighting type

Mainly used in fire pump emergency power supply system.

(5).Other types

A controller with different functions than the above controllers (for example: having all the functions of the above controllers).

From the above controller models, we can see that phase loss, voltage loss, and undervoltage are common conversion conditions for Dual Power Automatic Transfer Switch. In some products, we can also see more conversion conditions, such as: overvoltage, abnormal frequency, Fire signal input, etc. These are selected based on the characteristics of the load.

3. Dual Power Automatic Transfer Switch conversion method

Operating procedures: self-injection and self-recovery, self-injection but no self-recovery, mutual backup.

Self-transfer and self-recovery means that when the normal power supply is monitored for deviation, Dual Power Automatic Transfer Switch can automatically switch the load from the normal power supply to the backup (or emergency) power supply. If the normal power supply returns to normal, the load will automatically return to the normal power supply.

In the new standard, the definitions of automatic switching, non-resetting and mutual backup are unified. When the common power supply is monitored to detect deviations, Dual Power Automatic Transfer Switch can automatically switch the load from the common power supply to the backup (or emergency) power supply. If the common power supply returns to normal, Dual Power Automatic Transfer Switch It cannot automatically return to the normal power supply. Dual Power Automatic Transfer Switch can only return to the normal power supply when the backup (or emergency) power supply fails or manual prognosis occurs.

4. Firefighting linkage:

In the fire protection system, loads such as fire pumps, fire fans, and fire elevators need to ensure the reliability of power supply. Even if the lines are inspected, they should be in a reliable power supply state. When a fire occurs, all non-fire power supply circuits need to be powered off. For example, after receiving the fire control signal, the elevator in the building should be in a state where both power supplies are cut off, which means the elevator is out of service. Pay attention to these two applications during product selection.

At the same time, the fire load is allowed to operate in short-term overload. Dual Power Automatic Transfer Switch chooses multi-purpose PC-level products (even if the protective circuit breaker or fuse on the upper end of Dual Power Automatic Transfer Switch is protected, Dual Power Automatic Transfer Switch can still switch to the backup power supply)

Having said so much, in which situations is Dual Power Automatic Transfer Switch generally used? Taking the community we live in as an example, can you think of which loads require Dual Power Automatic Transfer Switch?

The following are some common electrical equipment in our community:

Fire water pumps, fire fans, fire elevators, ordinary elevators, community street lights, distribution boxes, emergency lighting distribution boxes, TV room distribution boxes, sewage pump distribution boxes, etc.

Seeing these devices, think about whether long intermittent power outages of any device will have a great impact on our lives, and may even endanger our personal lives.

Years of operating experience in the power grid have shown that transformers and lines are reliable power supply components. It is rare for users to have an accident with one power supply while another power supply is undergoing maintenance or accidents. Moreover, such operating accidents are often due to misoperation. Caused. It is mandatory for Dual Power Automatic Transfer Switch products to have reliable electrical interlocking and mechanical interlocking, which is to avoid accidents caused by short circuit between the two power supplies due to human misoperation and ensure the safety of operators and power transmission and distribution equipment.

Next, let us take a look at common Dual Power Automatic Transfer Switch application solutions. The following figure shows the application of Dual Power Automatic Transfer Switch in different locations:

Through the above cases, we can probably understand some applications of conventional Dual Power Automatic Transfer Switch. At the same time, there will still be some products with special needs in some special fields, such as Dual Power Automatic Transfer Switch that allows power supplies to be connected in parallel for short periods of time. This type of product allows power supplies to be connected in parallel for short periods of time, thus Achieve uninterruptible power switching.

Dual Power Automatic Transfer Switch with bypass can be used for Dual Power Automatic Transfer Switch inspection and maintenance without powering off the load. When inspection is required, the Dual Power Automatic Transfer Switch parallel loop is turned on to ensure power supply to the load. At this time, the Dual Power Automatic Transfer Switch is cut off for inspection. When the inspection work is completed, the Dual Power Automatic Transfer Switch is connected. At this time Then cut off the parallel circuit switch to achieve uninterrupted power supply maintenance and improve power supply quality.

The following are some related companies that produce and sell Transfer Switches and have a good reputation in the power field:

Schneider Electric: Schneider Electric is a leading global provider of energy management and automation solutions, providing various types of transfer switches and electrical equipment.

Eaton: Eaton is a multinational electrical equipment manufacturer that provides various types of power management solutions, including transfer switches. Eaton has the following series of Transfer Switches:

ATA

ATD

MATS

Socomec: A trusted transfer switch supplier focusing on power quality and sustainable energy solutions, Socomec is a trustworthy transfer switch supplier.

Socomec's Transfer Switch has the following series:

Manual Changeover Switch

SIRCO M (16 to 125 A)

SIRCO MV (100 to 160 A)

SIRCO (125 to 5000 A)

SIRCO AC (200 to 4000A)

SIRCO PV IEC (100 to 2000A)

Socomec Remotely  Transfer Switch

ATyS S,ATyS d S (40 to 125A)

ATyS d M (40 to 160 A)

ATyS r (125 to 3200 A)

ATyS d H (4000 to 6300 A)

Socomec Dual Power Automatic Transfer Switch

ATyS t M

ATyS g M

ATyS p M

ATyS g

ATyS p

Caterpillar: Caterpillar is a world-renowned manufacturer of construction machinery and power systems. They also provide backup generators and transfer switches.