The JSY-10B multifunctional voltage loss timer is suitable for monitoring the operating status of three-phase three wire, three-phase four wire, active and reactive energy meters used for power metering. When the PT circuit is artificially or non-human (primary and secondary sides) blown, and the CT secondary circuit is open or short circuited, the meter can automatically record the corresponding voltage loss time or CT circuit open or short circuit time. In order for the electricity metering department to make up for human or non-human omissions in electricity measurement. It is of great significance to strengthen electricity management and improve the level of metering management.

2、 Functional Features
1. The timing or measurement of the voltage loss is optional by the user (a selection switch has been set on the right side of the nameplate in the meter).
2. Function of recording the number of times of voltage loss. (The identification prompt is "Ln").
3. Eight digit LED digital display: The first two digits indicate the prompt, and the last six digits display the corresponding data content.
4. Non zero data items are displayed in a loop with a time interval of 4 seconds.
5. When a certain phase loses voltage or disconnects, its corresponding indicator light on the panel starts flashing.
6. The total reset switch can clear all data at once. (Upper right side of the label in the table)
7. Using EEPROM memory, data can be guaranteed not to be lost within 20 years.
8. Adopting surface mount technology, the product has high reliability and good processability.
9. programmability: The pulse constant can be inputted through the buttons in the table.
When there is no current (no load) in the circuit, there will be an audible and visual alarm in the meter after voltage loss, but there will be no time measurement.
When the A, B, and C phases lose voltage simultaneously, the digital display in the meter does not show, and the buzzer alarm is interrupted to save battery energy consumption. However, the internal operation is normal, and the display will resume after the voltage returns to normal.

3、 Technical indicators
1. Timing error: ≤ 0.5/s/d
2. Pulse measurement error: ≤ 0.01 level
3. Starting current: ≤ 10mA (can be set according to user ordering requirements)
4. Current circuit impedance: ≤ 0.05 ohms
5. Voltage loss: 78% UO ± 2 volts (UO is the nominal voltage)
6. Return voltage: 80% UO ± 2 volts (UO is the nominal voltage)
7. Maximum power consumption of the whole machine: ≤ 4VA
8. Timing range: 0-9999.99 hours
9. Measurement range: 0-9999.99KW. h
10. Instrument constant: XXXXimp/KW. h (five digit setting according to the order requirements for production machine settings)
11. Input pulse: amplitude 5V, width ≥ 10ms, frequency ≤ 50HZ
12. Rated voltage: 3 × 100, 3 × 380/220V, 3 × 57/100V
13. Rated current: 5A
14. Normal operating time during continuous three-phase voltage loss: ≤ 70 days
15. Backup battery service life: ≥ 5 years
16. Whole machine lifespan: 20 years
17. Weight: 1.8kg
18. Outer dimensions of inner packaging: 288 × 156 × 70mm3

4、 Installation dimension diagram

JSY-10B Multi functional Voltage Loss Timer