SS-17C Type Time RelayDetailed product description：

SS-17C Type Time Relay Application:

SS-17C time relay is used as a delay control component in DC 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.
Characteristic: When the voltage is below 60% of the rated voltage, the time circuit is guaranteed to not work, eliminating the possibility of zero second action under high residual voltage.

Relay model name:



Working Principle:
The schematic diagram of the relay principle is shown in Figure 1.
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 crystal vibrates, generating clock pulses. After frequency division, the counter counts the pulses. When the counted pulse number reaches the delay setting value, the trigger flips and drives the relay to execute the action output.


Usage:
5.1 The action time setting is coordinated by two 8421 code dial switches and one DIP four speed small switch. The setting formula is t=k * (MN) s (where k is the setting number of the DIP four speed small switch and MN is the setting number of the dial switch). For example, if k is 0.01 and MN is 35, then the setting time is 0.01 × 35=0.35s.
5.2 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:
6.1 Rated DC voltage: 220V, 110V, 48V.
6.2 Setting Range Delay Setting Range: 0.02s-990s; The minimum step difference is 0.01s.
6.3 The operating voltage of the action voltage relay is (60% -70%) of the rated value, and it is reliable not to operate if it is less than 60% of the rated value.
6.4 The return voltage of the return voltage relay should not be less than 5% of the rated value.
6.5 Delay Consistency Under benchmark conditions: When the delay is set between 0.02s and 0.99s, the consistency error is not greater than 3ms
When the delay is set to 1-990s, the consistency error is not greater than (0.1% setting value+2ms).
6.6 Delay setting error: Under benchmark conditions, the average error shall not exceed (0.2% setting value ± 2ms).
6.7 Return time: The relay return time shall not exceed 15ms.
6.8 Power consumption: At rated voltage, the power consumption of the relay shall not exceed 6W.
6.9 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 a medium with an explosive hazard and a voltage not exceeding 250V, the surrounding medium does not contain corrosive metals, insulating gases, 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.
6.11 The following parts of the dielectric strength relay should be able to withstand an AC voltage with a frequency of 50Hz for 1 minute without insulation breakdown or flashover. (a. Each conductive circuit should be able to withstand an effective voltage of 2kV for non charged metal parts or metal shells; b. The input terminal should be able to withstand an effective voltage of 1.5kV between the contact terminals and adjacent groups of contact terminals; c. The dynamic and static contacts of the same group of contacts should be able to withstand an effective voltage of 1kV.
6.12 Anti interference performance
The relay should be able to withstand a frequency of 1MHz attenuated oscillation wave, with a total voltage amplitude of 2kV for the first half wave and a difference of 1kV for the test voltage. The relay should not malfunction or refuse to operate.

Wiring diagram behind the relay:




Relay external dimensions and opening dimensions:
Figures 1 and 5 show the protruding modular insertion structure.

Ordering instructions:
When placing an order, the relay model, specifications, rated voltage, and order quantity must be specified.

SS-17C Type Time Relay（No image available）