One of the key components in enabling a Smart Grid system is monitoring of Distribution Transformers (DTs). This is also the first step in distribution automation. Monitoring of distribution transformers improves the visibility into the low voltage (LV) network and provides insights that help the utility company to utilize the power network in an optimum way.

Transformer monitoring brings a lot of benefits for utility companies, including the capability to recognise when transformers are overloaded and take remedial measures. In many cases, the life of a transformer is curtailed due to lack information around the operation of the transformer. It improves the visibility into the low voltage power network and helps utility companies deliver high quality electricity to it's customers. This system provides real time information about voltage, power factor, current, harmonics and unbalance from the LV network; and based on this information, utility companies can initiate remedies to solve problems as they occur or in many cases carry out preventive measures that prevents outages.

Utilities can also use the reports generated by the system to make decisions on distribution network planning, capacity enhancement, etc by identifying critical points in the distribution network that require to be extended or upgraded.

CS-DTMU provides an end-to-end solution that comprises of monitoring, data acquisition, reporting and presentation. The CS-DTMU panels can report data to either the cloud-based web application or SCADA systems or both depending on the requirement of our end clients. We also provide a 'device-todatabase(DB)' solution which essentially acquires data and provides it in a set of database tables for further processing by end-client applications.

  • Enhances the life of transformer assets
  • Individual phase transformer loading
  • Temperature monitoring of transformer
  • Reporting of power quality values of the transformer
  • Real-time alarms for power outage, tampering and power quality threshold exceedances
  • Data can be used for carrying out Energy Audit, Load Survey and Fault Analysis
  • Real-time dashboard reporting overall transformer and communication status
  • Reduce cost of scheduled and unscheduled maintenance
  • Enables the utility to carry out better load management as it provides accurate real-time information on transformer loading
  • Can be used to ascertain theft detection and localisation based on behavioural patterns of the transformer
  • Decrease outage duration - detect transformer or outgoing LV feeder outages or problems and send outage events to the central system
  • Comprehensive reporting of monitored parameters in a consolidated manner for analysis. Overcapacity, thresholdcrossing, etc are highlighted in the reports
  • Instantaneous alerts to Operator as well as field personnel describing alert incident e.g. oil level low threshold reached,monitored parameter crossing upper/lower threshold, etc.
Digital Inputs
  • 8 / 16 optically isolated status inputs: 24 VDC or 48VDC with 10% overload
  • LED indications
  • 4-5 mA typical current burden per input indications
  • DIN Rail mounted terminal block for input
Control Outputs
  • 4 / 8 Trip / Close 1 Form B contacts
  • 2 Amp current carrying capability
  • 180 W breaking @ 30 VDC
  • 35 W breaking @ 150 VDC
  • Optional Select-Before Operate (SBO) functionality
  • DIN Rail mounted terminal block for input
Analog Inputs
  • 4-Channel Analog card
  • 2- RTD Input with Pt100
  • 2- Analog input
Multifunction Meter
  • True RMS measurement
  • Accuracy Class 1.0
  • THD for current and voltage
  • Individual harmonics upto 31st order
  • 4 Line LED display
  • CT Input 1A or 5A
  • Frequency 45 to 65 Hz
Modem - 3G Option
  • Dual band HSPA and dual band GPRS/EDGE
  • Upto 7.2mbps Uplink and 21mbps Downlink speed
Modem - 4G Option
  • LTE-FDD: B1/B3/B5/B8
  • LTE-TDD: B34/B38/B39/B40/B41
Communications
  • Protocols: IEC 60870-5-104/DNP3.0 Slave for SCADA connectivity
  • VPN protocol - IPSec
  • 1 x RS232/RS485 Serial Port with Modbus RTU for multifunction meter connectivity
  • Ethernet port for configuration/local control
  • Built-in 3G/4G Modem for remote connectivity
  • Connectors: RJ45 for Ethernet, RJ45 for Serial port, SMA Connector 3G/4G Antenna
Configuration
  • Web based configuration
Auxiliary Power Supply
  • Input options: 100V to 264V AC
  • Maximum of 25 W power
  • Battery Back up : 2 Hours
Physical
  • Dimension : 380mm x 380mm x 210mm
  • Mounting: Wall mount or Pole mount
  • Terminations: DIN Rail mounted Terminal blocks for Digital input, Control output, Power, SMA
  • Connector for 3G/4G antenna.
  • Cable Glands for wire termination
Environmental
  • Operating Temperature: 0°C to 60°C
  • Humidity : 95% non-consensing
Standards and Protection
  • CISPR11 - Electromagnetic disturbance
  • EN61000-4-2 - ESD Immunity Test
  • EN61000-4-3 - Radiated immunity test
  • EN61000-4-4 - Electrical fast transient/burst test
  • EN61000-4-6 - Conducted immunity test
  • IEC 68-2-1 - Cold test
  • IEC 68-2-1 - Dry Heat test
  • IEC 68-2-6 - Vibration test
  • IEC 68-2-30 - Damp heat, cyclic (12+12 hour cycle)
  • IP65 Rated Panel for indoor or outdoor applications