Applications

1. PERMANENT and PERIODIC ON-line Monitoring on HV Apparatus such as; Transformers and Generators.
2. PERMANENT and PERIODIC On-line Monitoring on HV Cable joints and Cable terminations.
3. Measurements are made according to international standards (IEC 60270, CIGRE 15/33.03.05)


User Benefits

1. Clear picture in regard to the current state from the insulation.
2. Reproducability and comparabillity
3. Improvement of maintenance schedule
4. Less unexpected breakdowns
5. Optimization of the life cycle


Specifications

* Resolution of apparent charge: 12 bit bipolar
* Accuracy of phase resolution: 0.3 degree
* PD measuring range (AUTO-ranging): up to 100.000 pC, attenuation in 6 dB steps up to 90 dB
* PD frequency band: 10 kHz ... 2.000 kHz
* Pulse repetition frequency: 50 kHz
* Trigger sources: Phase, internal Mains, External
* Power supply: 100 V to 240 V AC, 50/60 Hz, < 30 W
* Pre-configured digital filters
* range of low cut-off (40 dB per decade): 100 / 200 / 300 / 400 / 500 / 750 / 1'000 / 1'500 kHz
* range of high cut-off (40 dB per decade): 500 / 1'000 / 1'500 / 2'000 kHz
* Note: It is in accordance to IEC 60270 for a wide-band PD Instrument e.g. with a frequency range of 100-500 kHz.
* Special UHF Type available


Accessories

* bushing tap Adapter with PD Measuring Impedance LDM-6 to connect to the bushing tap on transformers
* PD Decoupling unit PDDC-24 with integrated Measuring impedance
* PDDC-24 Installation Kit, used to install PDDC-24 on generators
* Connection-Box to collect cables from LDM-6 or PDDC-24 for PERIODIC On-line monitoring on transformers and generators
* External calibrator LDC-5 for external calibration of the standard PD measuring circuit according to IEC 60270
* Relay Box-Interface, to control external alarms (lights, buzzers etc.)
* PD Guard-Interface allows access to PD Guard data on PC level for integration purpose in Host (SCADA) system.

Click Here for the PD-Guard & PD-Guard/UHF Technical Specifications Brochure