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Энергетические кабели - Испытания и диагностика Диэлектрическая диагностика кабеля LPD Monitor
LPD Monitor
Серия: SebaKMT
запросить ценуDescription
The LPD (live partial discharge) Monitor can be used for temporary or constant monitoring of partial discharge on medium- and high-voltage systems and cables up to a rated voltage of 66 kV.
With its 16 input channels, the lightweight LPD Monitor
is an ideal, portable system for a fast check of critical PD within cables or their accessories.
Even a quick test can provide useful information on the condition of the cable as a basis for identifying the required maintenance work, such as a comprehensive offline PD diagnosis.
The PD signals are recorded using inductive (HFCT) and/or capacitive (TEV) sensors. The inductive sensors are placed directly around the insulated conductor or the cable sheath. The capacitive sensors can be easily attached to metal parts of the switchgear using a magnetic holder.
Depending on the number of sensors, the signals from each sensor are recorded at set intervals (every 1 to 20 minutes). These readings are immediately analysed by the integrated software. The signals are categorised either as a “local PD” or a “cable PD”. The measured level is compared to the values stored in a database and then assigned to one of four possible assessment categories. PD activity rated as “critical” automatically generates an alarm message.
The user can check the current readings and the progress of the PD activity at any time via remote access.
Технические характеристики:
| Technical data | |
| LPD Monitor | |
| Measuring channels | 16 |
| Sampling rate | 100 MS/s |
| Power supply | 110 ... 240 V AC, 50…60 Hz |
| Power consumption | 90 VA |
| Operating temperature | -20 °C … + 45 °C |
| Remote access via… | LAN/GPRS/HSDPA/dial-up modem |
| Protection class | IP 20 |
| Weight | ca. 15 kg |
| Dimensions (W x H x D) | 524 x 206 x 428 mm |
| HFCT Sensor (100/50) | |
| Transfer impedance | 4,0 mV / mA ±5% |
| -3 dB frequency response | 100 kHz – 20 MHz |
| Typical fall time | 2.5 µs ±5% |
| Typical rise time | ≤ 20 ns |
| Load impedance | 50 Ω |
| Max. 50 Hz current | 300 A |
| TEV Sensor | |
| Frequency response | 1 MHz – 50 MHz |
| Typical fall time | 0.4 ms ±5% |
| Typical rise time | ≤ 5 ns |
| Spare capacity | 150 pF |
| Load impedance | 50 Ω |
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