JSS series time relayDetailed product description：

Purpose:
The JSS series time relay is used as a delay control component in DC and AC circuits for power system relay protection, control circuits, or industrial control. Especially suitable for situations where high time measurement accuracy is required and the time difference is small.

Relay model name:
JSS series time relayThe model, classification, and specifications are given in Table 1



Working Principle:
This relay is a static digital time relay, composed of imported CMOS integrated circuits, using frequency division and counting principles to achieve delay. The standard clock pulse is generated by a quartz crystal oscillator.
Once the rated voltage is applied to the relay, the internal instantaneous relay will activate and output, causing the crystal to vibrate and generate clock pulses. After frequency division, the counter will count. When the counted pulse number reaches the delay setting value, the trigger will flip and drive the relay to execute the output action.
The schematic diagram of the relay principle is shown in Figure 1.



Usage:
4.1 The action time setting is composed of two independent sets of three position 8421 code dial switches and one DIP five speed small switch, which work together. The setting formula is t=kT (s) (where k is the setting coefficient of the DIP five speed small switch and T is the setting number of the dial switch). For example, if k is 0.01 and T is 357, then the setting time is 0.01 × 357=3.57 (s).
4.2 Due to the precise delay of this product, the minimum delay setting value is 20ms. Therefore, it is hoped that the contact points for controlling the input excitation amount of this product will not shake. If used in situations where the input excitation amount shakes, users must make special ordering requirements.

Main technical parameters:
5.1 Operating voltage
a) When the input is DC, the operating voltage of the relay is (60% -70%) of the rated value, and it is reliable not to operate if it is less than 50% of the rated value;
b) When the input is AC, the operating voltage of the relay is (60% -80%) of the rated value, and it is reliable not to operate if it is less than 50% of the rated value.
5.2 Return voltage
a) When the input is DC, the return voltage of the relay should not be less than 10% of the rated value;
b) When the input is AC, the return voltage of the relay should not be less than 15% of the rated value;
5.3 Delay consistency under benchmark conditions:
a) When the input is DC, the consistency is not greater than (0.1% set value+3ms);
b) When input is for communication, the consistency should not exceed (0.1% set value+10ms).
5.4 Delay setting error under reference conditions:
a) When the input is DC, the setting error shall not exceed (0.1% setting value+3ms);
b) When input is communication, the setting error shall not exceed (0.1% setting value+10ms).
5.5 Return time under baseline conditions:
a) When the input is DC, the return time shall not exceed 20ms;
b) When input is for communication, the return time should not exceed 25ms.
5.6 Power consumption: At rated voltage, the power consumption of the relay shall not exceed 10W.
5.7 Contact Performance
In a DC circuit with a voltage not exceeding 250V, a current not exceeding 1A, and a time constant of 5ms ± 0.75ms, the breaking capacity is 30W; in an AC circuit with a voltage not exceeding 250V, a current not exceeding 5A, and a power factor of coso=0.4 ± 0.1, the breaking capacity is 250VA. The electrical life of the relay is 104 times.
5.8 Working conditions
a) The usage location does not allow explosive media, and the surrounding media should not contain corrosive metals, gases that damage insulation, or conductive media. It is not allowed to be filled with water vapor or have serious mold presence;
b) Strong vibrations and impacts are not allowed in the usage location;
c) The usage location should have facilities to defend against rain, snow, wind, and sand;
d) The usage location does not allow an external magnetic induction intensity exceeding 1.5mT.
5.9 Dielectric Strength
Each conductive circuit of the relay should be able to withstand a 2kV (effective value) AC test voltage of 1kV (effective value) and 50Hz between the exposed non charged metal parts and the casing. The test should last for 1 minute without insulation breakdown or flashover.
5.10 Anti interference performance
The relay should be able to withstand a frequency attenuation oscillation wave of MHz, with a common mode voltage amplitude of 2.5kV and a differential mode voltage of 1kV for the first half wave of the test voltage. The relay should not malfunction or refuse to operate.

Wiring diagram behind the relay:




Relay external dimensions and opening dimensions:
a) JSS-11A, JSS-12A, JSS-13, JSS-14: using Figure 7 in the universal structural system;
b) JSS-15, JSS-16: Using Figure 3 from the universal structural system;
c) JSS-17, JSS-18, JSS-19, JSS-24: Use Figure 1 in the universal structural system.

Ordering instructions:
When placing an order, the relay model specifications, rated voltage, wiring method, and order quantity must be specified. If the user requests to deliver goods in sliding contact mode, the relay can provide a set of delay contacts and a set of sliding contacts. If it is required to return immediately after the sliding contact is closed for a certain period of time, special instructions must be made when placing an order, and the duration of the sliding contact's closure must be specified.

JSS series time relay（No image available）