Detailed information on Italian DOSSENA relays:

Shenzhen Beituo Technology Co., Ltd. is the authorized general agent of Italy's DOSSENA in China.DOSSENA company was founded in 1962, mainly researching and manufacturing electronic components and electronic equipment. With a history of fifty years, its products have strict quality control standards in all aspects from design, production to testing, ensuring high quality and low failure rate (less than 1%). It has a good reputation in Europe, with excellent quality, complying with all relevant directives of the EU CE certification, and has RINA classification certification and ISO9001 quality certification.
The scope of the solution ranges from energy-saving equipment to monitoring and management of lighting systems, from power factor correction systems and factory power protection, to alarm systems and testing equipment.

DOSSENA products include：
*Part: Protection
1. Grounding leakage protection relay based on microprocessor
2. Grounding leakage protection relay with digital display
3. Circular current transformer
4. Insulation control relay, insulation monitoring device
5. Overvoltage limiter (for ungrounded neutral wire)
Part 2: Control
1. Power factor regulating relay
2. Thermal control unit
3. Alarm signal relay
Part Three: Measurement
1. Digital multimeter (multimeter) and power grid analyzer
2. Data logger

For details, please visit the homepage of Shenzhen Beituo Technology Co., Ltd. or request relevant product information.

Italian Dossena DOSSENA signal relay RECA 4/8
The problem with most electronic or electrical protection devices is that the alarm signal disconnects when there is a voltage drop in the auxiliary. In many cases, this is very important as it is to prevent operators from starting the faulty machine. A marker relay composed of a CMOS electronic system is capable of recording information related to the signal section even when the auxiliary voltage drops. The information related to the number of signals is displayed by the electromagnetic indicators on the front panel of the device (there are 4 or 8 indicators on the model), and when the number of signals related to the corresponding input is indicated, it will be polarized (input alarms can have NA or NC contacts). A unique and important feature of this device is that it can withstand occasional overvoltage that may occur in input alarms. The RECA equipment is equipped with a power on relay with automatic and manual signals, and a mechanical signal with an alarm relay, thereby increasing the functionality of traditional marking relays.
Italian Dossena DOSSENA jumper alarm system ISA RACK
The ISA-RACK alarm system is a built-in system that comes with a combined shelf and display in a box. It comes standard with a 48x42 mm light point and can also be equipped with a 48x48 mm light point if needed. This box has aluminum plated strips on the outside, and the closed panel (if needed) is mounted inside the aluminum sheet. The panel of the box is reinforced with four screws at the front. ISA-RACK can have 12, 20, or 28 or double the number of alert points, while ISA-RACK 40 and 56 consist of a combination of two 20 or 28 points ISA-RACK is equipped with 4 management buttons
Italian Dossena DOSSENA small relay DER2/E
DER2/E combines the characteristics of DER2/I, especially its compact size. Mainly used in motor control centers with limited space. The size of this relay is only 48x48x94 millimeters. Due to the use of microprocessing technology, its accuracy is higher. If requested by the customer, a protective cover can also be provided.
Italian DOSSENA small relay DER2/R-RM
DER2/R combines the characteristics of DER2/E and DER2/K, with a volume of 96x48x90 millimeters, suitable for motor control centers. Alarm points can be set to display differential current. It can also be equipped with a LCD electronic signaler, which can achieve memory function in case of power failure.
Italian Dossena DOSSENA contact relay DER 2/DCS
The difference between DER2/DCS and DER2/D2B is that they have an additional output contact. Small size, suitable for narrow spaces and requiring an additional output contact for monitoring systems such as remote signalers, PLCs, etc
Italian Dossena DOSSENA relay DER 2/D3LB for unprotected working environment
DER2/D3LB is used in wiring systems to prevent short-term discharge, lightning, peak, etc. It can be used in places without operators. For example, public lighting systems, street lights, etc DER2/D3LB automatically attempts to reset three times, each time for 60 seconds. This relay has an LED bar that can display the discharge percentage.
Italian Dossena DOSSENA relay DER2/V-VM with digital display
DER2/V combines the characteristics of DER2/K, but instead of using LED bars, it displays the differential current of the system in three digits (in mA or A), making it easy for users to understand at a glance.
It can also be equipped with a digital signal display, which can achieve memory function when the auxiliary voltage is insufficient
Italian DOSSENA 2 DIN module relay DER2/D2B
DER2/D2B is an industrial relay that utilizes microprocessing technology. The function is the same as DER2/I.
DOSSENA Dual Threshold Relay DER2/K-KM from Italy
DER2/K combines the characteristics of DER2/I to set alarm points and display differential current through LED bars. Users can set the threshold alarm to 30% or 60% through the switch on the front of the relay. Can be connected to an audible and visual alarm. The five point LED bar allows users to read the trend of differential current in the system. It can also be equipped with an electronic signal LCD display to achieve memory function when the auxiliary voltage is insufficient.
Italy DOSSENA Universal Relay DER2/I
DER2/I is the most commonly used relay product in DOSSENA. The size is standard 96x96 millimeters. Especially suitable for places where instrument height is required.
This relay has all the functions of DER2 relays.
Italian DOSSENA Synthetic Relay DER 2/C
The DER2/C relay combines the characteristics of DER2/D3B and can be applied to all DOSSENA beam transformers. It is easy to install and compact in size.
Italian DOSSENA multifunctional power factor regulator RFH4-7
The RFH7 relay is mainly an instrument composed of a microprocessor used to automatically adjust the power factor. It is necessary to connect a three-phase power supply of 230V or 400V. The main functions include two digit cos φ measurement values; Three digit display of line voltage, current, active power, and reactive power; Two digit display of internal motherboard temperature; The adjustment range of cos φ in manual or automatic mode is from 0.80 to 0.98; Capable of instructing the fan to cool the motherboard and adjust the startup temperature; Automatically determine the working frequency of 50 or 60 Hz
Italian DOSSENA overvoltage limiter LT1-LT2-LT3-LT4
Overvoltage limiter can prevent accidents caused by sudden high voltage in low-voltage wiring. According to the adjustment level, it can be divided into four models: LT1, LT2, LT3, and LT4
If required by the customer, an additional handle can be provided.
Italy DOSSENA Remote Signal Panel PSR
PSR is an acousto-optic signal board that can transmit normal operating signals or alarm signals emitted by SRI/V or ASR/V to the controller. The front is an insulation board, with green light representing the signal of normal voltage operation, and yellow light and ringtone representing the signal of fault. There is a button above to turn off the ringtone.
Italian Dossena DOSSENA restarts relay RAM
If the power supply voltage is insufficient or lower than the starting value, the restart relay can be used to automatically control the equipment to restart. The memory time is 0.2 to 30 seconds. After the power supply is restored, the RAM starts timing, and after a restart delay, it can be adjusted to 0.4 to 60 seconds. It can send a closing pulse to the device's instruction contactor without interrupting the operation.
Italian Dossena DOSSENA alarm system display
The emergence of displays is to be able to remotely display possible issues on the control board. The monitor is made of polished aluminum frame with lights and sequential control buttons (which can be assembled as needed). The size of the lamp can be 48x48mm, 48x24mm or 30x30mm, and the color of the lamp can be red or yellow (more colors can also be available according to specific requirements).