Distributed comprehensive monitoring and evaluation system for power cable status
Partial discharge online monitoring
PD detection sensitivity: 5pC (the distance between the discharge source and the test point is less than 3m)
PD maximum measurable: 10000pC
HFCT bandwidth: 300KHz--30MHz analog input bandwidth;
Sampling rate: 100MS/s single sampling;
Working temperature: -40℃~85℃;
Cable sheath circulating current online monitoring
(1) Measuring range: 0.1A～30A; error range: 1% 0.1A.
(2) The waveform of the ground current can be recorded, and the waveform can be further analyzed in the time domain and frequency domain.
(3) After the test is completed, the development trend chart within a certain period of time can be displayed.
Cable temperature online monitoring
Measuring range: 0℃～125℃; error range: 1℃
Spatial resolution: ≤±1m
Positioning accuracy: ≤±0.5m
Single channel measurement time: no more than 8 seconds (under the conditions of a spatial resolution of ±1 meter and a measurement range of 8 kilometers, the temperature accuracy is ≤±1ºC)
Test channel port: 8 channels
Cable ambient temperature monitoring
The range is -30℃--150℃, which is convenient to assist in the calculation of current carrying capacity.