Anti islanding protection relay

 
photovoltaic anti islanding protection relay is mainly suitable for 110KV, 66KV, 35KV, 10KV and low voltage 380V photovoltaic power station small power grid connected power supply system,In the occurrence of the phenomenon of island, it can quickly disconnected grid connected switch, so ensure the safety of the entire power plant and related maintenance personnel.The anti islanding protection relay has the functions of over voltage, low voltage, high frequency, low frequency, reverse power, Peripheral switches trip together, frequency mutation and other protection.it is a high performance, cost-effective PV power plant anti island protection rel
main function of 9690D anti islanding protection relay     
      Over voltage
      low voltage
      Frequency is too high
      Frequency is too low
      Inverse power
      Peripheral switches trip together
    Frequency mutation 
 
action principle  of 9690D anti islanding protection relay  Over voltage:
      1.“Over voltage "- input;  
      2.When the line voltage is collected, the maximum line voltage is greater than or equal to the value of the overvoltage.
      3.Delay time is greater than or equal to "over voltage delay
      Meet the above conditions, then immediately drive3J（C7/C8）、4J（C9/C10）、5J（C11/C12）.At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright. 
 
low voltage:
      1.“Low voltage "-input；
      2. When the collected line voltage is less than the "low voltage setting value", and the cable voltage is greater than 30V.
      3.Delay time is greater than or equal to "low voltage delay”
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）.At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright.
 
Frequency is too high：
      1.“Frequency is too high - input"
      2. The frequency of acquisition is greater than or equal to the value of frequency.
      3. Delay time is greater than or equal to "the frequency is too high time delay”；
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）,At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright.
 
Frequency is too low:
      1.“Frequency is too low "- input
      2. The frequency of acquisition is less than or equal to the value of the frequency is too low
      3. Delay time is greater than or equal to "frequency is too low delay”
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright.
 
Inverse power:
      1 "inverse power" - input;  
      2.The absolute value of the two inverse power is greater than or equal to the value of the inverse power "
      3. Delay time is greater than or equal to "inverse power delay"；
      Meet the above conditions, then immediately drive
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）,At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright.Two times inverse power:
 
Peripheral switches trip together：
      1.“Peripheral switches trip together”
      2. Input signal 6(R6=1);
      3. Time delay is greater than or equal to“Peripheral switches trip togethertime-delay”；
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）.At the same time, it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright. 
 
Frequency mutation：
      1.“Frequency mutation“—input
      2. df/dt  Frequency mutation setting value greater than or equal to“Frequency mutation setting value”；
      3. Delay time is greater than or equal to the frequency of mutation delay”；
      Meet the above conditions, then immediately drive 3J（C7/C8）、4J（C9/C10）、5J（C11/C12）.At the same time it also drives the accident signal 11J (C1/C3). The liquid crystal display action name, the panel accident lamp is bright.
 
9690D anti islanding protection relay communication：
      1）. communication interface ：
      1 way Ethernet port
      1 roads and 485 ports
  2）.Communication protocol：stipulations of an 
      IEC60870-5-103 Communication , stipulations of an 
      MODBUS