JSY-2B Voltage Loss TimerDetailed product description：

JSY-2B Voltage Loss Timer

Voltage loss in the voltage circuit of an energy meter is one of the main faults of high-voltage energy metering devices, which is the main reason for the loss of electricity and the need to replenish electricity. Especially when the voltage circuit of an energy meter is completely lost, the consequences are more serious, and the resulting electricity replenishment is highly arbitrary and lacks sufficient basis. For important metering occasions, such as power plant grid access points, power supply points, and large user metering points, due to monthly electricity consumption reaching 10 million kilowatt hours to over 10 billion kilowatt hours, this loss of electricity and replenishment of electricity have a serious impact on the fairness of settlement. In addition, due to the lack of alarm measures and inspection systems for voltage circuit faults in electric energy meters, long-term voltage circuit faults often occur, and electric energy metering devices operate under fault conditions for a long time, affecting the accuracy of electric energy metering.  

The JSY-2B voltage loss timer is used to measure the fault time when there is a malfunction in the energy metering system. Although it does not belong to the energy metering device, it is necessary to consider using a voltage loss timer in the energy metering device. Therefore, the new version of the "Operation and Management Regulations for Electric Energy Metering Devices" (DL/T488-2000) and the "Interim Measures for the Management of National Interconnection Grid Gateway Electric Energy Metering Systems" have listed the voltage drop timer as an indispensable device in high-voltage electric energy metering devices.  

In response to the shortcomings of the existing voltage circuit voltage loss timer, which has not received due attention as an important measuring device and has incomplete design, functions that cannot fully meet usage requirements, low reliability, no communication interface, and low grade, the technical personnel of Beijing Yubang Power Technology Co., Ltd. have summarized more than ten years of experience in energy measurement work, adopted advanced digital sampling and programmable logic device technology, and applied surface mount technology to produce JSY-2B voltage loss timer. This provides a high-performance and highly reliable device for estimating the amount of electricity generated by energy metering devices after voltage circuit loss.  

The JSY-2B voltage drop timer can also provide a basis for the electricity department to analyze and eliminate the operation faults of the secondary circuit of the energy metering device. This product fully meets the requirements of the power industry standard "Technical Conditions for Voltage Loss Timer (DL/T566)" and also meets the electromagnetic compatibility requirements of "Multi functional Energy Meter (DL/T614)".

Main functions:

Accurately record the time of voltage loss in the energy metering circuit and the corresponding amount of lost power: under the condition that the load current is greater than the starting current, when the voltage loss in the energy metering voltage circuit (one phase, two phases or three phases) occurs, accurately accumulate the time of voltage loss, calculate the corresponding amount of lost power, indicate the phase of disconnection, and issue a voltage loss alarm until the voltage is restored to normal.  
Accurately record the state and time of voltage loss fault: When one, two, or three phases lose voltage, record the starting time (below 78% of the rated voltage), ending time (above 85% of the rated voltage), current value, and power value respectively, and record the cumulative number and time of voltage loss.  
Accurately record the no current state and time: When there is no current in one, two, or three phases (less than the starting current), record the corresponding time and voltage value, as well as the cumulative no current time and frequency.  
Communication function: Equipped with RS-485 interface, capable of on-site and remote communication; Equipped with an infrared communication interface, data reading and programming settings can be performed on-site.  
Used in conjunction with the electricity billing system: It can communicate with the main station of the electricity billing system and the on-site electricity data acquisition device to transmit information about voltage loss faults.  
Phase sequence error monitoring and alarm: Display phase sequence and alarm for incorrect phase sequence.  
Wrong wiring indication: It can display common wrong wiring errors.  
Alarm method: Alarm is triggered by the flashing alarm indicator light on the panel; And output through relay contacts.  
Display function: It can record and display real-time data such as three-phase voltage, three-phase current, three-phase power, three-phase electrical energy, and voltage qualification rate.  

Technical specifications of JSY-2B voltage loss timer:

Accuracy of voltage and current measurement: 1%
Accuracy of power and energy measurement: 2%
Measurement accuracy: 1s; timing error: ± 1min/30d
Reference voltage: 57.5V, 100V
Rated current: 1A, 5A
Voltage upper limit: 120% of the reference voltage
Lower limit of normal operating voltage: 70% of the reference voltage
Reference frequency: 50Hz
Data retention time after power failure: more than 10 years
Starting current: 0.5% ± 5mA of rated current
Starting voltage: 78% ± 2V of the reference voltage
Return voltage: 85% ± 2V of the reference voltage
Voltage circuit power consumption: less than 1.5VA per phase
Event recording capacity: 200 records (100 records for voltage loss and 100 records for no current)
Communication interface: infrared interface, RS485 interface
Usage environment: Temperature: -20~+85 ℃; Humidity: 25% to 80%
Fully meet the requirements of the power industry standard 'Technical Conditions for Voltage Loss Timer (DL/T566)'
Meet the requirements of electromagnetic compatibility in the "Multifunctional Energy Meter (DL/T614)".  

Application example:

Used together with the energy billing system, record voltage loss events in the voltage circuit of the energy meter and output alarms

Shared with the electromechanical integrated energy meter, record the voltage circuit loss of the energy meter and the amount of electricity replenished


Used together with electronic energy meters, record the total voltage loss of the voltage circuit of the energy meter and the amount of electricity that should be replenished

JSY-2B Voltage Loss Timer