Please consult Xugong: 15,868,892,329 
 Insulation monitoring devices used in ungrounded systems (IT systems); used in medical operating room power distribution grid insulation monitoring, transformer temperature monitoring, and condition monitoring of circuit load monitoring. 
 Residual current monitoring equipment used in the earthing system (TT / TN-S system); 
 The low pressure system protection relay; 
 Medical electrical safety testing equipment 

 Which series insulation monitors to monitor the entire IT system-to-ground insulation condition of PISO-8100 series insulation fault location system can not only monitor IT systems insulation condition, but also find the online loop-to-ground fault occurs. 
 Residual current monitors in the TN-S or TT system, neutral grounding system to monitor exchange or pulsating DC component of residual current, commonly known as leakage current. Residual current monitors in the same system to monitor the smooth DC, pulse DC or AC component of the residual current. Residual current monitoring system uses a modular design, a single module can monitor the residual current value of the 8 loop. 
 My company a variety of low-voltage protection relay for electronic measuring relays, with a very large response value adjustment range, and at the same time have all kinds of time delay and movement memory. 

 The medical electrical safety testing instrument design and development of test equipment for the corresponding IEC standard. 
 Please consult Xugong: 15,868,892,329