Signals and Systems India Private Limited

Siruseri, Chennai, Tamil Nadu

In order to implement a 100 % stator earth fault protection based on sub harmonic injection, a 20Hz voltageis injected into the generator starpoint. The 20-Hz generator SGEN-1001is used in combination with the bandpassfilterSBPF-1001in theStator Earth fault protection. Injection can be performed byconnecting the SGEN-1001and the SBPF-1001to the load resistor of an earthing or neutraltransformer. If an earth fault occurs in the generator starpoint, the 20 Hz voltage drives a currentthrough the fault resistance. From the driving voltage and the fault current, the protectiverelay determines the fault resistance.

The Display used to monitor the 20Hz and 50Hz current passing through NGT transformer. This could help to monitor the stator earth faultand could record the current every minute. The current shall be displayed in milli Amps for both 20Hz and 50Hz. If an earth fault occurs in the generator starpoint, the 20 Hz voltage drives a currentthrough the fault resistance. The current can be measured using clamp on CT which would clamped between load resistor and NGT. It gives indication if the current values are lower or higher than the set threshold

Our Smart Energy Management System addresses, ways in which energy utilization can

be made efficient and in turn, result in energy savings. Our solutions make it possible to

bring in behavioral changes which bring in awareness amongst users and our

sophisticated analytics, give insights on managing the energy better.

SYNTIME is a highly accurate GPS NTP time server with GPS/GNSS time reference. It is a

sleek 1U height and 19 rack-mountable unit which is suitable for power and process

industry equipment. Suitable for the global market with leap second correction and DST

settings.

The DLMS meter reading application runs on Android mobile devices. It is an effective and

efficient meter reading solution for DLMS meters (IEC-62056) & smart meters. This

application supports reading and real-time viewing of field meter profiles, data view,

programming the meter, smart meter connect / disconnect. This is also a solution to

address the last mile connectivity issues, where the AMR and AMI networks failed due to

network problems.

3SIQ enables current quality analysis using wireless technology and thus allows operators

to work from a safe distance. This Industry 4.0 & ISO 50001 condition-based monitoring

solution seamlessly combines the flexibility of using any smart phone or tablet to provide

powerful analytics and insights towards predictive maintenance, making the maintenance

engineers' life not just safer, but smarter as well.

Smart Polyglot wireless optical probe for meter reading is designed to talk to meters of all protocols PACT, ANSI, IEC. It is only device that talks to any type of meter in any language.

The Smart Polyglot has a Bluetooth interface and enables seamless use with any DOS, Linux, Android, Windows or any Microcontroller based devices with Bluetooth support. This Smart Polyglot Bluetooth probe can detect the commands from Bluetooth connected devices and establish a connection automatically for meter reading applications.

• The Smart Polyglot communicated between the meter and mobile device is bi-directional over Bluetooth.
• Smart Polyglot works with any android mobile / device with a Bluetooth port.
• Fully charged Smart Polyglot can last for 30 Hours

Smart Polyglot is designed to talk to meter on RS232 protocol, it has a Bluetooth interface and enables seamless use with any DOS, Linux, Android, Windows or any Microcontroller based devices with Bluetooth support. This Smart Polyglot Bluetooth probe for meter reading can detect the commands from Bluetooth connected devices and establish a connection automatically for meter reading applications.

• The Smart Polyglot communicated between the meter and mobile device is bi-directional over Bluetooth.
• Smart Polyglot works with any android mobile / device with a Bluetooth port.
• Operates on the available PT supply of the metering system.

USB Optical Probe for meter reading is designed to talk to meters of all protocols PACT, ANSI, IEC. It is the only device that talks to any type of meter in any language. It has a USB interface and enables seamless use with any Linux, Android, or Windows based devices with USB support.

• The USB Probe communicated between the meter and mobile device is bi-directional through USB Port + OTG cable.

RS232 Optical Probe for meter reading is designed to talk to meters of all protocols PACT, ANSI, IEC. It is the only device that talks to any type of meter in any language. It has a RS232 interface and enables seamless use with any DOS, Linux, Windows or Any microcontroller based devices with RS232 support.

• The RS232 Optical Probe communicated between the meter and device is bi-directional through RS232 port.