JSY-3BT Type All Electronic Voltage Loss and Flow Interruption TimerDetailed product description：

The JSY-3BT series full electronic voltage loss and current interruption timer (LCD Han display) is a new generation product designed and manufactured by our company using the latest technological achievements of today's electronic technology. This product is used to monitor the operating status of three-phase three wire (three-phase four wire) active (reactive) electricity meters. When the PT circuit (primary or secondary side) melts or completely loses phase, or when the CT circuit opens or shorts, the instrument will accurately determine the phase of the voltage loss and open or short circuit current, and record the corresponding time (or kWh) in detail. It also has sound and light alarms. The product also has infrared communication function and can be connected to GSM or CDMA to meet the customer's remote data transmission needs, in order to help the power metering department manage the power grid and supplement human or non-human leakage of electricity. When the phase sequence of the PT circuit is reversed, the instrument can issue a prompt and time it. It is of great significance to strengthen electricity management and improve metering level, and is the most ideal energy metering and monitoring instrument.

1、 Main models and specifications of JSY-3BT fully electronic voltage loss and interruption timer

model	Category	Rated voltage	rated current
JSY-3BS	three-phase three-wire	3×100V	3 × 1A, 3 × 5A
JSY-3BT	three-phase four-wire	3×220/380V 3×57.7/100V	3 × 1A, 3 × 5A

2、 Function and Features
1. Voltage loss timing
When the voltage circuit (PT) loses voltage, it can promptly and accurately determine the phase of the fault and record the cumulative time during the fault period. If there is an external active power pulse input, abnormal electrical energy during the fault period can be recorded simultaneously.
2. Cut off timing
When the secondary side (CT) of the current transformer is open circuited, it can timely and accurately determine the phase of the fault and record the cumulative time during the fault period. If there is an external active power pulse input, the abnormal power during the fault period can be recorded simultaneously.
3. Fault power record
When the instrument has active metering pulse input, it can accurately measure the faulty electrical energy in phase, thereby obtaining relatively accurate power replenishment.
4. Record of fault frequency
When the voltage circuit (PT) loses voltage and the current circuit (CT) opens, the internal fault counter of the instrument starts to record the number of times the voltage circuit (PT) loses voltage or the number of times the current circuit (CT) breaks. It is an auxiliary parameter.
5. Event recording
This instrument can timely record the starting date, starting time, ending date, and ending time of voltage loss and interruption in the order of event occurrence. There are up to 100 event record items.
6. Data communication
For instruments with communication functions, data communication can be carried out with communication terminals or upper computers through the RS485 communication auxiliary terminal of the instrument. The communication distance should not be less than 1200 meters without relay devices. (This feature requires the user to provide a communication protocol and explain it before placing an order).
3、 Main technical indicators
1. Timing accuracy:<0.5S/d
2. Starting voltage: 78% Un ± 1V
3. Return voltage: 82% Un ± 1V
4. Starting current: ＜ 0.3% Ib
5. Impedance of current circuit
When the rated current is 5A: ＜ 0.05 Ω
When the rated current is 1A: ＜ 0.5 Ω
6. Timer capacity: 0-9999.99 hours
7. Meter capacity: 0-9999.99kw. h
8. Power off operation time:>180 days
9. Data retention time for power failure:>50 years
10. Electrical parameters
Ø Working voltage: Un ± 20%
Ø Rated current: 3 × 1A, 3 × 5A
Ø Insulation withstand voltage:>2000VAC
Voltage circuit power consumption:<3VA
Active power pulse input amplitude: ＜ 50V Pulse width: ≥ 10ms Frequency: ＜ 50Hz
11. Applicable conditions
Operating temperature: -25 ℃ to+60 ℃
Ø Working environment humidity: ≤ 95%
12. Dimensions and weight
Ø Dimensions: 240 × 148 × 83.5 mm
Ø Weight: Approximately 1.7kg

4、 Wiring diagram