JSY-10B(Z) Multi functional Voltage Loss TimerDetailed product description：

The JSY-10B (Z) 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 instrument 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. The use of this instrument is of great significance in strengthening electricity management, improving the economic efficiency of the power sector, and enhancing the level of measurement management.

2、 Functional Features
When any one phase (two phase, three phase) of the three-phase voltage is disconnected or below 78 ± 2% of the rated voltage, the corresponding red voltage indicator light will turn off, the timer will start working, and the disconnection time of that phase will be displayed on the Chinese character LCD display.
When any phase (two-phase, three-phase) of the CT secondary side is short circuited, the corresponding green current indicator light will turn off, the timer will start working, and the short-circuit time of that phase will be displayed on the Chinese character LCD display.
When either phase (two phases) of the CT secondary side is disconnected, and the current of the other phase and two phases is ≥ 15mA, the corresponding green current indicator light will turn off, the timer will start working, and the disconnection time of that phase will be displayed on the Chinese character LCD display.
When the three-phase voltage is connected to the instrument, if the phase sequence is correct, the phase sequence indicator light will turn on; otherwise, the phase sequence indicator light will turn off. And display the accumulated time of phase sequence errors on the Chinese character LCD display. (Optional feature)
5. High sensitivity current transformers are used to provide the working energy of the whole machine, so that the backup battery is not consumed when the three phases lose voltage simultaneously.
6. The electronic reset device is installed inside the instrument to prevent abnormal reset operations.
7. When the user's three-phase three wire or three-phase four wire electricity consumption is unbalanced, even if the current of one or two phases is zero, the instrument will never misjudge, completely solving the dispute problem caused by misjudgment and misrecording of current imbalance in similar products in the past.

3、 Technical indicators
1. Timing error: ≤± 1s/24h
2. Timing voltage: 78% ± 2V of rated voltage (can be customized by the user)
3. Return voltage: 85% ± 2V of rated voltage (can be customized by the user)
4. Rated current: 5A
5. Rated voltage: 3 × 100V, 3 × 380/220V, 3 × 57/100V
6. Instrument power consumption: ≤ 3VA
7. Timing range: 0-9999.99 hours
8. Display mode: Eight Chinese character prompts, six digit data display
9. Timing starting current: ≥ 15Ma (can be customized by the user)
10. Current circuit impedance: ≤ 0.05 Ω