- THIẾT BỊ KIỂM TRA PHÓNG ĐIỆN CỤC BỘ SEBA LPD MONITOR
MODEL: SEBA LPD MONITOR
HÃNG SX : SEBA - ĐỨC
Benefi
ts Portable online PD measuring system for monitoring MV and HV systems
16 channels
Allows effi cient forward planning of necessary maintenance work
Quick and easy to install
Integrated automatic knowledge-based evaluation of measured PD levels
Current status can be viewed at any time via remote access
Description
The LPD (live partial discharge) Monitor can be used for temporary or constant monitoring of partial discharge on medium- and highvoltage 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.
Scope of delivery
LPD Monitor
6 inductive sensors (HFCT 100/50)
2 capacitive sensors (TEV)
Set of coaxial cables (2×5 m, 4×10 m and 2×15 m)
Accessory bag
Keyboard/mouse/modem
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 approx. 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
Options
Set of additional sensors (6 x HFCT 100/50, 2 x TEV) Different-sized HFCT sensors (ask SebaKMT for details) Flat coaxial cables for enclosed switchgears