ABB Electrical TRU3 Time Delay Relay (3805)

ABB Electrical TRU3 Time Delay Relay (3805)

Basic Information

ABB's TRU3 Time Delay Relay (3805) is an electrical time delay relay. It serves as a time delay control in electrical control circuits and the type 3805 helps to differentiate it in the product range.

Functional features

Time delay function:

The core function is time delay. It is possible to delay the output signal for a certain period of time after the input signal has been triggered according to a pre-set time parameter. This delay time can be fixed or adjustable within a certain range, depending on the design of the relay. This delay function is useful in many circuits that require sequential control or time interval control.

For example, in a motor start control circuit, it enables a motor to start at reduced voltage. When the start signal arrives, it first passes through the time delay relay and delays for a period of time before allowing the motor to run at full voltage, which can effectively reduce the current shock when the motor starts.

High reliability:

ABB as a well-known brand, this relay usually adopts high-quality electronic components and manufacturing process, which ensures its reliability in various industrial environments. It can work stably for a long time, reducing the risk of circuit failure due to relay failure.

Multiple triggering methods:

It may support a variety of triggering methods, such as voltage triggering, current triggering and so on. Different triggering methods can be selected according to specific circuit requirements, enhancing the suitability of the relay in different application scenarios.

Application Areas

Industrial automation:

Widely used in the control circuits of automated production lines. For example, in automated packaging production lines, it can control the time interval between the various actions of the packaging machinery to ensure the smooth progress of the packaging process.

Power Systems:

Used in the protection and control circuits of power systems. For example, in the self-provisioning device of the substation, the time delay relay can control the time when the backup power supply is put into operation to ensure that the backup power supply is put into operation at the right time after the main power supply fails, so as to avoid damages to the power equipment.

Building electrical systems:

It is also used in building lighting control, lift control and other systems. For example, in the stairwell lighting control, the time delay relay can realise the function of lights out when people leave, and automatically turn off the lights after a delay of some time after the personnel leave, so as to achieve the purpose of energy saving.

OTHER INFORMATION

• Read the safety precautions carefully. 

• Check the delivery for transportation damage. If damage is found, notify the  supplier as soon as possible. 

• Do not use the operator panel in an environment with high explosive hazards. 

• The supplier is not responsible for modified, altered or reconstructed  equipment. 

• Use only parts and accessories manufactured according to specifications of the  supplier. 

• Read the installation and operating instructions carefully before installing,  using or repairing the operator panel. 

• Never allow fluids, metal filings or wiring debris to enter any openings in the  operator panel. This may cause fire or electrical shock. 

• Only qualified personnel may operate the operator panel. 

• Storing the operator panel where the temperature is lower/higher than  recommended in this manual can cause the LCD display liquid to  congeal/become isotopic. 

• The LCD display liquid contains a powerful irritant. In case of skin contact,  wash immediately with plenty of water. In case of eye contact, hold the eye  open, flush with plenty of water and get medical attention.