JY-45/A3 Series two-phase voltage relays

Summarize

JY-45/A3 series two-phase voltage relays are digital AC voltage relays with delay function.It can be used in relay protection devices of generators, transformers and transmission lines as action element of over-voltage or under-voltage blocking.The relay consists of a digital circuit, which has the characteristics of high sensitivity, real-time measurement and display of current voltage value.In the case of multi-phase input, all phases are set at the same time and the same relay is exported.

Insulation performance

Relay circuit and the leakage between two conductive parts, as well as between each independent loop, respectively with open circuit voltage of 1000V of the shaking table test the insulation resistance is more than 100MΩ

Dielectric strength

The relay shall be subjected to 2KV (50Hz) AC test voltage for 1min between each circuit and the exposed conductive part as well as the independent circuit without insulation breakdown or flash-over phenomenon.

Functional principles

The input AC voltage is converted into a small signal voltage by a voltage converter, which is sent to the CPU after filtering bias. The CPU collects the rated voltage value set by the user, and then carries out setting calculation based on the actual voltage sampling value. If the operating conditions are met, the corresponding over-underweight outlet relay at the outlet will be calculated.

Commissioning and maintenance

Noun explanation
This relay is the JY-40 series digital voltage relay developed by our company.
Setting value: The relay consists of two setting values, setting value of operating voltage (setting range: 0.1 UE-1.0 Ue) and setting value of operating time (setting range: 00.00S-10.00S).
Press once: Press a key and lift it.

Power on self - test includes FLASH self - test, constant - value self - test, power on self - test, relay does not work.If the self-test fails, turn off the digital tube and light the ALARM.

Enter the setting state:
Under the normal operation interface, press the SELECT key once, when the ALARM light is on and the two-phase voltage is still displayed cyclically, indicating that the setting state has been entered. To exit the setting state, press the SELECT key again to exit.

Setting of operating voltage:
In the setting preparation state, press ENTER once to confirm, the current voltage setting value is displayed, and the first digit tube flashes, allowing modification.At this point, press the SELECT key to SELECT the bit you want to modify, press UP,DOWN to modify the value of the current bit.After modifying the operating voltage, press ENTER to confirm. All bits of the digital tube do not flicker and display the current time setting value.Time setting for acceptance.

Exit setting state:
After the time setting, press ENTER once to confirm. The digital tube is displayed as shown in Figure 1. At this time, the ALARM lamp is still on when the setting is ready to exit.