JSH-10 series high-precision time relayDetailed product description：

1. Overview:

The JHS series static AC power-off delay relay is used in relay protection and automation circuits for AC operation, as a time element for delayed return after AC instantaneous action power-off. The relay can replace the DSJ-10 series electromagnetic time relay, and the wiring form of the two is completely the same, so there is no need to change any wiring. This product overcomes the quality problems of DSJ10, such as large delay error, high noise, and delayed movement of moving contacts; This product has the characteristics of high delay accuracy, sensitive and reliable operation, and can be selected from any of the three structures.

2. Structure and working principle:
The JHS-1 relay adopts a protruding fixed structure for the housing structure, and the external shape and installation hole size are detailed in the attached figure.
The JHS-2 relay adopts a protruding plug-in structure for the housing structure, and the external shape and installation hole size are detailed in the attached figure.
The JHS-3 relay adopts a Xuji embedded plug-in structure for its housing structure. The appearance and installation hole size are detailed in the attached figure.
Relays consist of crystal oscillators, frequency dividers, setting switches, drive circuits, and power circuits. When the rated point voltage is applied to the relay, the internal instantaneous relay and two delay relays of the relay act instantaneously, the contacts switch, and the power circuit and timing circuit are in a power-off state to improve the anti-interference performance of the relay. When the input voltage drops significantly or completely disappears, the instantaneous relay returns instantly (the two delay execution relays are still in action), and the contacts also return instantly, connecting the energy storage power supply to the timing circuit. The crystal oscillates to generate a clock pulse, which is divided into 10ms. The counter counts the timing pulse, and when the counted pulse number matches the set switch value, it drives the execution relay to return, completing the function of delayed return after power failure.  
3. Instructions for use

The delay return time t1 of relay K1 is set by the upper three digit switch, and the delay return time t2 of relay K2 is set by the lower three digit switch. The time setting value is obtained by multiplying the three digit switch by 0.01S. For example, if the three digit setting is 580, the time setting value is 580 × 0.01S=5.8S. The setting values of t1 and t2 can be equal or not equal.
4. Main technical parameters
4.1 Rated voltage: AC 380220, 110, 100V.
4.2 Rated frequency: 50HZ or 60HZ.
4.3 Ensure that the voltage required for reliable energizing of relay contacts is not greater than 80% of the rated voltage.
4.4 Ensure that the reliable power-off return voltage of the relay is not less than 10% of the rated voltage.
4.5 The delay error of relay power-off delay return under rated voltage shall not exceed 0.1% of the setting value ÷ 10ms within the setting range
4.6 The variation of relay power-off delay under rated voltage shall not exceed 0.1% of the rated value ÷ 10ms. Variation refers to the difference between the maximum and minimum values of the relay measured five times at the same time setting point.  
The contact points for the delayed return of the 4.7 second set can be independently set, with a time setting range of 0.02-99.99 seconds, and the delay setting values can be different or the same.
4.8 The power consumed by the relay at rated voltage shall not exceed 4VA.
4.9 Relays are allowed to withstand 110% of rated voltage for a long time.
4.10 Relays with a voltage not exceeding 250V, current not exceeding 1A (time constant T=5 ± 0.75ms in DC circuits), and a contact breaking capacity of 30W. In AC circuits with a voltage not exceeding 250V, current not exceeding 1A, and power factor COS0:0.4+0.1, the contact
The disconnect capacity is 150VA.
4.1l The effective voltage between each circuit of the relay and the exposed non charged metal parts should be able to withstand 2kV, and the input circuit and contacts should be able to withstand 1kV, 50HZ AC voltage. After a 1-minute experiment, there should be no insulation breakdown or flashover phenomenon.
4.12 The relay can operate reliably within the temperature range of -10 ° C to 40 ° C.
4.13 Relay has a mechanical lifespan of 105 times and an electrical lifespan of 104 times.