针对25Hz相敏轨道电路用JZXC-480测试盘测试JRJC轨道继电器参数时,存在只能测试轨道电压,不能测试相位角的问题,研制了V-Φ型25Hz相敏轨道电路测试盘。1原理由JRJC系列继电器扭矩公式M=kUsinΦ得知,当轨道电压U已定,Φ=90°时,M最大;Φ=0时,M=0,此时既使U存在,轨道继电器依然落 For 25Hz phase sensitive track circuit JZXC-480 test disk test JRJC track relay parameters, there is only the test track voltage, the phase angle can not be tested, developed a V-Φ 25Hz phase track circuit test track. 1 principle JRJC series relay torque formula M = kUsinΦ that when the rail voltage U has been set, Φ = 90 °, M maximum; Φ = 0, M = 0, this time even U exists, orbit relay still falling