SBT supervision system for the low-voltage side of transformer substations (SBT-TDM, SBT4V-5C, SBT-VTN, SBT-CDS, SBT-D)
Country: Spain · Model: SBT-TDM / SBT4V-5C / SBT-VTN / SBT-CDS / SBT-D
SBT is a set of instruments for supervising the low-voltage side of transformer substations, connected to the output of the 0.4 kV power transformer and to the outgoing lines. It includes the SBT-TDM and SBT4V-5C analyzers, the SBT-VTN neutral monitor, the SBT-CDS concentrator and the SBT-D display. Data on the network state and faults goes to the dispatch center of the network company.
- SBT-TDM
- three-phase analyzer-digitizer for the output of a 0.4 kV power transformer; supply 24 V DC, input 1 A; dual RJ45 for daisy-chain connection
- SBT4V-5C
- digital LV analyzer: 3 voltages, 3 currents; 50–60 Hz; insulation 2 kV/1 min; Ethernet Modbus TCP, RS485 Modbus RTU; DIN rail
- SBT-VTN
- neutral-to-earth voltage monitoring 2–150 V, error <1 %, supply 24 V DC, 0.3 W, RJ45
- SBT-CDS
- data concentrator for SBT-TDM and SBT-VTN over RS485, transmission to the control center
Technical specifications
| SBT-TDM | three-phase analyzer-digitizer for the output of a 0.4 kV power transformer; supply 24 V DC, input 1 A; dual RJ45 for daisy-chain connection |
|---|---|
| SBT4V-5C | digital LV analyzer: 3 voltages, 3 currents; 50–60 Hz; insulation 2 kV/1 min; Ethernet Modbus TCP, RS485 Modbus RTU; DIN rail |
| SBT-VTN | neutral-to-earth voltage monitoring 2–150 V, error <1 %, supply 24 V DC, 0.3 W, RJ45 |
| SBT-CDS | data concentrator for SBT-TDM and SBT-VTN over RS485, transmission to the control center |
| SBT-D | HMI display: table of 2×8 cells of 16 characters, 4 capacitive keys, RS485 Modbus |
| Standards | UNE-EN 61010-1, UNE-EN 61010-2-30, UNE-EN 60255-26, UNE-EN 61000-6-2/-6-4 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
SBT-TDM digitizes the parameters of a three-phase network: voltage, current, frequency, power, power factor, energy and harmonics. The supply is 24 V DC and the rated input is 1 A for low-power current transformers, and two RJ45 connectors link the modules in a chain, carrying power and data over one cable. SBT4V-5C collects three phase voltages relative to neutral and three main currents, works at 50–60 Hz, has 2 kV insulation for 1 min, Ethernet (Modbus TCP) and RS485 (Modbus RTU), and is mounted on a DIN rail. SBT-VTN watches the neutral-to-earth potential difference in the 2–150 V range with an error below 1 % and detects a broken neutral or leakage currents; its supply is 24 V DC and its consumption 0.3 W. SBT-CDS collects the data of SBT-TDM and SBT-VTN over RS485 and passes it to the control center. SBT-D is an HMI display with a table of 2 columns by 8 rows (up to 16 characters per cell), a header of up to 32 characters and 4 capacitive keys, controlled over RS485 Modbus.
How to choose
Start with what needs to be monitored. For the output of the power transformer take SBT-TDM, for individual outgoing lines with three voltages and currents SBT4V-5C, and for checking the neutral earthing SBT-VTN. SBT-CDS collects the data of several modules, and SBT-D provides local indication. For panel network analysis without a substation chain, look at AHM1, AHM3 or SAM3000.
Request a price and lead time
SBT supervision system for the low-voltage side of transformer substations (SBT-TDM, SBT4V-5C, SBT-VTN, SBT-CDS, SBT-D). We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What supply do the SBT modules have?
SBT-TDM and SBT-VTN are powered from 24 V DC, and SBT-VTN consumes 0.3 W. Two RJ45 connectors make it possible to pass power and data over one cable.
In what range does SBT-VTN monitor the neutral?
The neutral-to-earth potential difference of 2–150 V with an error below 1 %. This detects a break or deterioration of the neutral earthing and leakage currents.
What interfaces does SBT4V-5C have?
Ethernet (Modbus TCP) and RS485 (Modbus RTU), DIN-rail mounting, 2 kV insulation for 1 min, frequency 50–60 Hz.
Which standards does the SBT system comply with?
UNE-EN 61010-1, UNE-EN 61010-2-30, UNE-EN 60255-26 and UNE-EN 61000-6-2/-6-4. CE declarations are available for SBT-TDM, SBT-CDS and SBT-VTN.
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