Products Description

Our Cable partial discharge online monitoring system uses HFCT sensors and a power-frequency phase sensor to collect synchronized pulse data. Pattern, trend, and event records help assess insulation deterioration while the cable remains energized.

Technical Principle

Sensors capture high-frequency, UHF, ultrasonic, or transient-earth-voltage signals produced by insulation discharge. The monitoring unit filters interference, extracts pulse features, compares phase-resolved patterns, and records amplitude and repetition trends for alarm and diagnosis.

Product Features

The Cable partial discharge online monitoring system measures discharge activity without taking the cable circuit out of service. Synchronized digital channels support several circuits or phases at one site. Band-pass filtering and noise recognition improve results in high-interference environments. Stored patterns and trends support comparison with site background and typical discharges

Operating Conditions

The product shall be installed and operated within the ratings stated in the technical parameters. Key site requirements include: frequency phase sensor to collect synchronized pulse data.. Keep the installation area clean, adequately ventilated, free from corrosive gas and severe vibration, and provide the specified grounding, clearance, and power quality.

Product Parameters

Parameter	Details
Measurement channels	4 independent channels; up to 16
Sampling accuracy / rate	≥12 bit; 1000 MHz per channel
Detection sensitivity / range	5 pC; 5 pC-100 nC
High-frequency band	300 kHz-50 MHz
Host supply / power	AC 85-260 V, 50/60 Hz or DC 24 V; 10 W
Host interfaces	RJ45 and RS485; UDP/IP and Modbus RTU
HFCT band / range	300 kHz-50 MHz; -75 to -20 dBm
HFCT sensitivity	≤10 mV
HFCT protection / environment	IP65; -40°C to +80°C; 5-95% RH
Phase sensor	50 Hz; 5-2000 A; class 0.5; 10 kV power-frequency withstand

Product Advantages

The Cable partial discharge online monitoring system measures discharge activity without taking the cable circuit out of service.
Synchronized digital channels support several circuits or phases at one site.
Band-pass filtering and noise recognition improve results in high-interference environments.
Stored patterns and trends support comparison with site background and typical discharges.

Main Applications

The Cable partial discharge online monitoring system is used for high-voltage cable joints, terminations, grounding leads, and sensitive route sections.

It supports substations, cable tunnels, industrial networks, and urban transmission routes.

The system is used for early warning and insulation-condition assessment.

Components

Part	Function
PD monitoring unit	Acquires, filters, analyzes, stores, and communicates pulse data.
HFCT sensors	Measure high-frequency discharge current on cable grounding leads.
Power-frequency phase sensor	Provides a zero-phase reference for PRPD analysis.
Platform software	Displays patterns, trends, events, and diagnostic comparisons.