Signals and Systems India Private Limited

Siruseri, Chennai, Tamil Nadu

The single phase portable reference standard (SPRS-1102) from SANDS is a hand held device that helps to calibrate the error present in the single phase energy meter i.e. the meter under test (MUT). The SPRS supports both static and electro-mechanical types of meters. It can also be used to compute the voltage, current, energy, phase angle etc of the meter under test. It has an LCD display and an alphanumeric keypad to suit the user. It can be interfaced with the PC for analysis. It has a capability of storing 1000 test results.

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.

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

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.

ARGUS Tri-axial wireless vibration analyzer brings a new dimension to the world of predictive maintenance to easily diagnose the health of motors and any connected driven assets like pumps, fans, compressors, etc. It enables easy condition monitoring of rotary machines and detects faults well before equipment failure. ARGUS reduces maintenance costs and increases asset lifespan.

The super-compact, IP65-rated vibration sensor provides reliable data for continuous monitoring and remote diagnostics. This portable sensor simultaneously measures vibration in three directions and is used as both a Single-axial sensor & a Tri-axial sensor. The dedicated ARGUS app allows you to view and store the RMS values of Velocity & Acceleration, Time waveform, and Velocity & Acceleration FFT spectrums on the smartphone. ARGUS can be mounted in any environment using a magnet, adhesive & stud.

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.

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.

Large display indicators measures and displays the Kilovolt from inputs like 63.5VAC, 4-20mA and data received from other equipment. It meets high accuracy of 0.1% to measure Kilovolt. The large display is for clear visibility of the kilovolt reading from a long distance. It is equipped with high bright red color 7 segment displays. These are commonly used in Power plants, Substations, Manufacturing units and Field environments to provide direct Kilovolt measurements.

High Voltage Online (Live Wire) Testing Solution provides the ratio error of the CT/PT Kit,

without having to shut down the industries for testing. HV Live wire screening method is

easy and time-efficient. Besides the waveform & harmonics analysis, CT saturation error or

any other error can be identified easily.

Large Display indicator measures and displays frequency from the input like supply voltage, 4-20mA and data received from other equipment. It meets high accuracy of 0.1% to measure Frequency. The large display is for clear visibility of the frequency reading from long distance. It is equipped with high bright red color 7segment displays. These are commonly used in Power plants, Substations, Manufacturing units and Field environments to provide direct frequency measurements of various devices.

Large display indicator measures and displays the Megawatt from inputs like 63.5VAC, 4-20mA and data received from other equipment. It meets high accuracy of 0.1% to measure Megawatt. The large display is for clear visibility of the MegaWatt reading from a long distance. It is equipped with high bright red color 7segment displays. These are commonly used in Power plants, Substations, Manufacturing units and Field environments to provide direct Megawatt measurements.

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 Three Phase Reference Standard Meter is used to test the accuracy of three-phase &

single-phase energy meters at the customer site without interrupting the service connec-

tion. The base equipment is connected to the meter via CT & PT and can be operated by an

electrically isolated tablet (using Android application). The accuracy class of our measuring

device is 0.05/0.1/0.2.

The large display is equipped with an accurate quartz clock that synchronizes with time

signals like NTP, IRIG-B and RS485/RS232. It is suitable for monitoring time from long

distance. It is wall/panel/tabletop mountable with customizable cabinets like MS, SS and

Aluminum.

GPS Clock offers an easy, cost-effective solution for accurate, synchronized time displays

without expensive, disruptive installation procedures since there are no wiring

requirements, installation times are drastically reduced.

It is a combined Modem for remote reading & local reading via Bluetooth through the

mobile app without opening the enclosure/seals. Dual Channel AMR Modem is an

innovative device that can be connected to any make of electronic energy meter by means

of optical/ RS232 port, which is compliant to DLMS IEC 62056-21 standard. AMR system is

compatible with 4G network to push the power consumption-billing data, load survey data,

and event data to a cloud-based server, with fallback to 3G & 2G. The modem can be

programmed to send any abnormal events to any number instantly. The modems have a

store and forward facility.

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.

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.

CMRI is a handheld computer used to download data from electronic tri-vector meters,

supporting different protocols like IEC, ANSI and PACT. CMRI is also compliant with DLMS

(IEC-62056) standard. CMRI can be interfaced with the portable printer for spot billing

applications.

RS232 to RS485 converter provide conversion between serial networks and other media.

They can transparently convert RS232 signals to RS485 signals and vice versa without

changing the PCs hardware or software. The serial media converter lets you easily build

an industrial grade, long distance communication system with standard PC hardware. It

comes with a built-in 120 terminator for system reliability and easy installation.

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.

SANDS Ethernet to Fiber Optic Media Converter is a rugged, industrial-grade 10/100M

Ethernet to Fiber Optic Media Converter, which provides one channel for media

conversion between 10/100BaseTX and 100BaseFX. It supports either multi-mode or

single-mode fiber optic and MDI (straight-through) and MDIX (crossover) cables. The

converter doesn't use DIP switch, jumper settings, or software drivers, making the unit

highly reliable and a truly plug-and-play device. It features auto-negotiation for half or

full-duplex and 10Mbps or 100Mbps data rates.

The three phase portable reference standard (TPRS-1107) from SANDS is portable equipment. The main objective of this device is to calibrate the errors in three-phase and single-phase energy meters i.e. the meter under test (MUT). The TPRS supports both static and electro-mechanical types of meters. It can also be used to compute the voltage, current, energy, power factor etc of the meter under test. It has an LCD display, an alphanumeric keypad that makes it easy for the user to operate the TPRS. It can be interfaced with the PC for data analysis. It has a capability of storing up to 8000 test results.

The GATEWAY / DCU is an intelligent device with built-in RS232, RS485 and RF modules to

acquire data from clusters of energy meters or MFMs using inbuilt Modbus / DLMS

Softwares. It also equipped with GSM/GPRS module to transmit the data to the remote

data acquisition server. DCU is based on an ARM Cortex-A5 processor having 512MB of

DDR2 memory and expandable NAND Flash memory up to 2GB. Edge / Sensor data can be

stored locally using the onboard SD card option. The cloud interface is LTE with 2G/3G

fallback.

SANDS make of AMR Modem SAM-1101 is an intelligent device that can be connected to

any make of electronic energy meter, which is compliant to DLMS IEC 620156-21 standard

by means of optical/ RS232 port. The meters can be located in either consumer premises or

distribution transformers. The modem draws its power from the meter terminal block and

connects to the communication port of the meter. Thus this add-on modem is

non-intrusive and can be retrofitted easily to any meter.