APM1200 On-line PD Monitoring System for MVSG


It is an advanced on-line diagnosis system for medium voltage switchgear that predicts any problems for advanced maintenance by detecting partial discharge such as Corona, Arc that is generated from degradation of internal system of medium voltage switchgear, thereby contributing to prevent damages from system breakdown, electrical fire, etc and to assure system quality and longevity.


Advanced Broadband Sensor

  • Enhanced detecting range
  • Patent-pending pattern antenna design/ Trend mode

Superior Reliability and Accuracy

  • Monitoring and analyzing PD signal continuously
  • Measuring PD signal in Real-time / Event / Trend mode
  • Precise data analyzing and recording

User Friendly Operation & System

  • Generating reports automatically
  • Supporting SCADA
  • Displaying PD signal in Real-time / Trend mode

Diagnosis Unit

Item Specification
Power 90 to 240 VAC, 50/60Hz
Input More than 250 channels
Diagnosis Built in neural network engine classifies PD into 5 types: Protrusion Electrode, Floating Electrode, Defective Insulator, Free Moving Particle and Noise
Alarming HMI, Email
Graphic Tools PRPD, PRPS, Trend, and others
Channel Configuration Three threshold levels for alarming can be configured for each channel individually
IEC61850 Enabled
Remote Monitoring Enabled
Communication 10/100Base-T/TX Ethernet
Storage Database
Self Test Enabled

Local Unit

Item Specification
Power 90 to 240 VAC, 50/60Hz 120 to 370 VDC
Input 8 UHF Channels, N-Type Connector
Sensitivity Can detect discharge less than 5 pC within monitoring area of GIS/GIB
Wide Bandwidth 100 ~ 2000MHz
Dynamic Input Range - 65 to 0 dBm
Band Pass Filter Combination of 4 LPF and 4 HPF
Noise Gating Enabled (External Noise Sensor)
Communication Fiber Optic (100Base-FX)
Notification 4 x LED Status Indicators
Operating Temperature -25°C to 55°C
Dimensions 355 x 580 x 196 (W x H x D) mm