ALL PRODUCTS

PDM-505 Partial Discharge Tester | Multi-Sensor, Live Line Detection, for Switchgear & Cable Patrol

PDM-505 Partial Discharge Tester | Multi-Sensor, Live Line Detection, for Switchgear & Cable Patrol

PDM-505 Digital Intelligent Portable Partial Discharge Patrol Tester with Dual Independent Channels, 1pC Sensitivity, Multi-Sensor Compatibility, for Live On-Site HV Equipment Insulation Defect Detection & Location

Description
Specifications
Applications
Advantages
FAQ
Recommended Products

Description

PDM-505 is a professional portable partial discharge (PD) patrol tester designed for live on-site detection, routine inspection and fault location of medium and high voltage electrical equipment including switchgears, transformers, GIS, cable joints and instrument transformers in substations, power plants, industrial enterprises and commercial buildings. It strictly complies with IEC 60270, GB/T 7354-2003 and DL/T 417-2006 standards, adopting high-speed synchronous acquisition technology and multi-sensor fusion detection scheme that effectively identifies internal insulation defects and avoids unexpected insulation breakdown accidents.

The instrument features 2 independent measurement channels with up to 100MHz sampling rate per channel, achieving 1pC ultra-high detection sensitivity and more than 80dB dynamic range, capable of capturing weak partial discharge signals in early insulation failure. It is compatible with both acousto-electric integrated sensors and high frequency current transformers (HFCT), covering detection requirements of different equipment types. The programmable digital filtering technology effectively suppresses on-site power frequency interference and electromagnetic noise, ensuring accurate and reliable test results in complex field environments.

Specifications

Parameter	Specification
Compliance Standards	IEC 60270, GB/T 7354-2003, DL/T 417-2006
Measurement Channels	2 independent channels, synchronous acquisition
Sampling Rate	Up to 100MHz per channel
Detection Sensitivity	1pC
Measurement Range	1pC ~ 10000pC
Dynamic Range	＞80dB
Measurement Bandwidth (3dB)	10kHz ~ 30MHz
Digital Filter	Programmable within 50kHz ~ 30MHz
Range Gears	×0 / ×1 / ×10 / ×100 / ×1000
Nonlinear Error	≤±5%
Voltage Shock Resistance	2500V (signal port, power port to ground)
Acousto-Electric Sensor	Non-contact measurement, fiber optic transmission, detects ultrasonic + electrical signals
HFCT Sensor	50kHz ~ 20MHz detection band, coaxial cable transmission, 1pC sensitivity
Display	High-brightness LCD display
Language Support	Chinese / English bilingual
Data Storage	Multiple groups of test data and waveforms with time stamps
External Synchronization	Supported (power frequency trigger)
Power Supply	AC 220V±10%, 50Hz; Built-in rechargeable lithium battery
Battery Life	≥4 hours continuous working
Operating Temperature	-10℃ ~ +50℃
Humidity	≤95% RH (non-condensing)
Altitude	≤1000m
Enclosure	Portable engineering plastic chassis

Applications

Core Test Objects

Switchgears & ring main units: 10kV~35kV indoor/outdoor switchgears, ring main units, distribution cabinets
Power transformers: 10kV~220kV oil-immersed and dry-type transformers
GIS & HV switch cabinets: Gas insulated switchgear, high-voltage metal-enclosed switchgears
Cable accessories: Medium and high voltage cable joints, cable terminals, grounding wires
Other equipment: Instrument transformers, surge arresters, bus ducts

Typical Usage Scenarios

Power utilities: Substation equipment routine patrol inspection, insulation state evaluation and live fault diagnosis
Industrial enterprises: Internal power distribution system regular inspection, preventive maintenance and accident analysis
Data centers: High-voltage distribution room daily inspection, power supply reliability assurance
Third-party testing institutions: Electrical equipment insulation state assessment, acceptance test and calibration services
Equipment manufacturers: Factory quality control, type test and after-sales fault diagnosis

Advantages

Compliance with International Standards

Fully meets IEC 60270, GB/T 7354-2003, DL/T 417-2006 → test results are globally recognized and traceable

1pC Ultra-High Detection Sensitivity

Captures weak early discharge signals, 80dB large dynamic range → identifies insulation defects at early stage, prevents sudden breakdown accidents

Multi-Sensor Compatible Detection Scheme

Acousto-electric non-contact detection + HFCT current detection → one instrument covers switchgear, transformer, cable and other equipment detection needs

Strong Anti-Interference Performance

Fiber optic isolation + programmable digital filtering → works reliably in complex electromagnetic field environments, reduces misjudgment rate

Dual Power Supply & Long Battery Life

Battery + mains dual power supply, ≥4 hours battery life → adapts to on-site test scenarios without mains power

Professional PC Analysis Software

Waveform analysis, data management, report generation → facilitates data archiving and insulation state trend analysis

Portable Integrated Design

Lightweight chassis, easy to carry → suitable for mobile patrol inspection and emergency on-site troubleshooting

FAQ

Q: What is the difference between acousto-electric sensor and HFCT sensor?

A: The two sensors are suitable for different test scenarios:

Acousto-electric sensor: Non-contact measurement, suitable for surface discharge detection of switchgears and cabinet equipment, no need to connect to the circuit, convenient for rapid patrol inspection
HFCT sensor: Clamp-on installation on the grounding wire, suitable for discharge detection of cables, transformers and other equipment with grounding wires, higher detection sensitivity for internal discharge
PDM-505 is compatible with both sensors, and users can select the appropriate sensor according to the test object.

Q: What does 1pC detection sensitivity mean?

A: pC (picocoulomb) is the unit of partial discharge apparent charge, which characterizes the intensity of partial discharge. 1pC sensitivity means the instrument can stably detect discharge signals as weak as 1 picocoulomb, which is sufficient to capture early weak insulation defects of electrical equipment, and realize early warning before insulation failure.

Q: Can PDM-505 perform live detection without power outage?

A: Yes. PDM-505 is specially designed for live patrol inspection. The acousto-electric sensor adopts non-contact detection, and the HFCT sensor is clamped on the external grounding wire. Both methods do not need to disconnect the equipment or stop operation, and can detect partial discharge during normal operation of the equipment, which does not affect the normal power supply.

Q: How to calibrate the instrument?

A: PDM-505 should be calibrated with a standard partial discharge calibrator that meets metrological requirements. The calibration steps are as follows: