Technical Specifications for Gprs Routers

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DAKSHIN HARYANA BIJLI VITRAN NIGAMOffice of the Chief General Manager/P&D,

Vidyut Sadan, Vidyut Nagar,Hisar-125005

Tel: 01662-221285, 221830 (GM/P&D) Fax: 01662-220481

Specification No.- S-183/DD-177/2008

TECHNICAL SPECIFICATIONS

FOR

GPRS ROUTERS

Chief General Manager/P&D,DHBVN, Hisar

Issue of the Month: April 2008

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1. Scope:

The scope of this specification covers GPRS ROUTERS with relevantstandards and Specifications, for the required functioning which is explainedin the subsequent sections.. They shall be suitable for operation on 24 Volts

DC systems.

1.1. GPRS Routers shall housed in a suitable enclosure to protect from EMCemission Hazards from the electrical equipments in which the device ishoused.

1.2. GPRS Routers shall be used to transfer the electrical parameters /values to the existing SCADA at the central control room at all six circlesof DHBVN.

1.3. GPRS devices shall be used to control, communicate and schedule the

electrical Substation, Distribution Transformers, Energy Meters, Numericrelays, Battery chargers, Cameras, etc

1.4. GPRS Devices shall be capable of communicating with differentprotocols only by changing the firmware. Required Protocols areModbus, Modbus on ethernet, IEC 101, IEC 104, PACT etc.

1.5. GPRS devices should be capable of configuring remotely via internet,telnet or through SMS

2. CLIMATIC CONDITIONS

The GPRS Router shall be suitable for satisfactorily working under thefollowing climatic conditions: -

Max. Ambient Temperature 700

C

Min. Ambient Temperature - 50 C

Max. Relative Humidity 100 %

Min. Relative Humidity 26 %

Altitude Below 1000 meters above mean sealevel.

3. SUPPLY SYSTEM:

Supply Voltage 240V AC

3x240V AC (Phase to Neutral), 415V AC (Betweenphases)

Voltage variation range -40% to +20%

Frequency 50Hz +/- 5%Power Factor +1 to -1


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4. Design and Purpose:

4.1. The GPRS units are used to control, monitor and schedule the circuits ofa substation, distribution transformer. The circuit is switched ON or OFFdepending on the system requirement. Such GPRS units are installedon all such breakers where load management control is required. By this

the total load on the feeders also comes down besides controlling usageof energy by individual circuits.

4.2. Such a system has become necessary to control and effective usage ofloads.

4.3. At present, loads are controlled by switching ON/OFF the breakersmanually.

4.4. The proposed system envisages control of LT / HT circuits by simpleadding on External I/Os attached to the GPRS Routers. The I/O should

be through an interposing auxiliary relay of suitable rating to providesafety to the output equipment.

4.5. Aux contacts of the breakers / equipments should be wired back to theGPRS Device I/Os for field positions. The device shall compare thestatus of the contact with the logical status of the breakers and generatea Failed to operate Message alarm in case of mismatch.

4.6. GPRS Router shall be capable of storing the required predeterminedtime schedules. The time schedules are likely to change as perrequirement depending on NIGAMs requirement.

4.7. GPRS Router shall capture the total hours of power supply provided toeach feeder (Circuit) on a daily basis and shall store data for 7 days.

4.8. GPRS Router shall facilitate timely Energy Audit of the systems bycommunicating and acquiring all the necessary details from the Energymeter.

5. Appl icable Standards:

The GPRS units shall be manufactured to confirm to following relevantstandards of Bureau of Indian Standard (IS) or any other internationalstandard.

6. GPRS Interface & Controller:

6.1. The GPRS Router shall operate on 10 30 VDC supply and shall besafe from the transients in the LV supply from the transformer

6.2. The GPRS Router shall be of any standard make as per clause 1.06.05,with a detachable Memory Card suitable to store at least 4 to 6 typicalprograms or schedules

6.3. It shall be possible to change schedules from a remote place by feedingthe required program externally. However selecting stored schedules


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from time to time shall be possible both at site and also from a remoteplace.

6.4. It should be easily possible to load the program at site by using anLaptop.

6.5. The GPRS Router shall be suitable for operation in outdoor, housed in ametal box and shall be capable of with standing temperature variationfrom -50C to +700C and having Relative Humidity from 30 95%without condensation.

6.6. Electromagnetic Compatibility for Electro static discharge and radiatedelectromagnetic fields shall confirm to relevant Standards as follows

6.6.1. EN 55022 Emission Test (Class A)

6.6.1.1. Radiated Emissions (30-1000MHz)

6.6.1.2. Conducted Emissions (0.15-30MHz)

6.6.2. EN 50082-1 Immunity Test

6.6.2.1. IEC801-3: Radio Frequency Electromagnetic Field

6.6.2.2. IEC 801-2: Electrostatic Discharge

6.6.2.3. IEC 801-4: Fast Transients, AC Power Ports andSignal cables

6.7. The GPRS Router shall be protected against system surges andharmonics at the input side.

6.8. The GPRS Router shall have communication capability of differentprotocols with RS 485 Inbuilt serial PORT for data acquisition from themeters and IEC 60-870-5-104 remote communication.

6.9. The GPRS Router shall function without error even if there has been apower interruption of 30 days after installation.

6.10. GPRS Router based system should be able to communicate with theenergy meter in the substations and capable of processing the followingparameters.

6.10.1. Maximum and Minimum current during the month, Phase wisefor all three phases.

6.10.2. Maximum and minimum voltage during the month, phase wisefor all three phases.

6.10.3. Maximum demand during the month,

6.10.4. Average power factor during the month.


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6.11. The GPRS Router should have provision for Communication to MobilesControl Station/SCADA over GPRS. A PC executing Programmingsoftware can be connected to a controller thru GPRS Interface or M2MGateway for transferring applications, animating objects and executingoperator mode commands.

6.12. The GPRS Router System shall be suitable for satisfactory performancewith Capacitors in the Circuit if installed at a later date.

Basic Features

Industrial GPRS router Firewall and VPN for secure communication Mobile operator independent static Should accept IP addresses from M2M Gateway at server or from

Service provider

1 x 10/100 Base-T Ethernet port 1 x RS-232/422/485 serial port 1 x RS-232 devise or console serial port Should support 11 bit serial device data Should have provision for Optional: Internal heater, battery back-up and

I/O extension Automatic re-establishment of communications in case of temporary

failure of wireless link. Provision of fixed IP addresses needed for two-way communications. Inbuilt security mechanisms to prevent unauthorized entry to the system

(VPN).

Watchdog to reboot the system in case of a fault condition. Industrial-grade hardware with -30 to +70 degrees celcius. Proven customer references in electrical network area. Digital input and output capabilities so, that the IO can be controlled and

read using Modbus or IEC-101/104 protocols.

Hardware (Basic configuration)

Processor

32 bit RISC processor

8 MB FLASH memory32 MB SDRAM memory

Power

6 26 VDC nominal input voltage1 5 W power consumptionResettable fuse and ESD protection

OtherBuilt-in Temperature sensor

Built-in Real Time Clock


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Environment (Temperature ranges)20 to +55 C (w/o heater)40 to +55 C (w heater, optinal)30 to +85 C (storage)Humidity 5 to 85 % RH

Network Interfaces

Ethernet port

10/100 Base-T. Shielded RJ-451,5 kV isolation transformerEthernet IEEE 802-3, 802-2

GPRS

Internal module and SIM card socketCompliant to GSM phase 2/2+FME external antenna connector (50 )Dual-band EGSM 900(2W) and GSM 1800GPRSGPRS multi-slot class 10GPRS mobile station class B85.6 kbps GPRS downlink speed21.4 kbps GPRS uplink speedCoding schemes CS1, CS2, CS3, CS4USSD Support

Serial Ports

Serial port # 1 / Console

RS-232 DTE, Male DB-9 connectorFull serial and modem signalsSpeed 300 460 800 bpsData bits 7 or 8, stop bits - 1 or 2Parity - None, Even, OddFlow control None, RTS/CTS

Protection 15 kV ESD and short circuitConsole RS-232, 19200 bps, 8 data bits,1 stop bit, no parity (8N1)

Serial port # 2

RS-232 DTE, RS-422, RS-485 (selectable)Male DB-9 connectorFull serial and modem signalsBiasing and termination selectableSpeed 300 460 800 bpsData bits - 7 or 8Stop bits - 1 or 2Parity - None, Even, Odd


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Flow control None, RTS/CTSProtection 15 kV ESD and short circuitSoftware

Network Protocols

PPP, IP, ICMP, UDP, TCP, ARP,DNS, DHCP, FTP, TFTP,HTTP, POP3, SMTP

Tunneling (Virtual Private Networking - VPN)

SSHv2 server and clientSSHv1 server and clientVPN using SSH protocolAuthentication with 1024-bit RSA key

Encryption with 3DES

Management

WWW, SSH, Telnet and consoleFTP, TFTP and HTTP software updateRouting RelatedStatic routing, proxy ARP, port forwarding,IP masquerading/NAT, firewallSerial Device Connectivity

Device server applicationAT modem emulationBuilt-in web server and preconfigured pages for diagnostics using browserNetwork/Remote upgradeable software

Firewall

LAN to GPRSGPRS to LANGPRS to Router

The Router with Modbus gateway shall have following settings

Gateway Status

User selectable Modbus gateway functionality enabled/disabled for the serial portEach serial port of should have its own Modbus Gateway definitions

Gateway Mode

User defined slaves location on network or serial sideNetwork Master to Serial Slaves Slaves are on serial sideSerial Master to Network Slaves Slaves are on network sideNote - If slaves are on network side also routes are needed to be defined


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Serial Protocol

Different the Modbus protocol used on serial communicationModbus RTU Serial devices use Modbus RTU protocolModbus ASCII Serial devices use Modbus ASCII protocolNote - Modbus RTU is more efficient and should be used whenever possibleNetwork Protocol

Modbus TCP Modbus TCP protocol over TCPModbus RTU over TCP Modbus RTU protocol over TCPModbus RTU over UDP Modbus RTU protocol over UDPModbus ASCII over TCP Modbus ASCII protocol over TCPModbus ASCII over UDP Modbus ASCII protocol over UDP

Note - Since M2M Gateway is being used to tunnel network traffic over SSH useModbus RTU over UDP when possible for efficient communication. The SSH tunnel

already contains TCP properties like reliable message delivery.

7. Slave Response Timeout

Defines the time in microseconds (10E-6 seconds) how long router/gatewaywaits the response from Modbus slave (Secure/other Meters). If the responseis not receive router should generate and return Modbus gateway exception

Selectable Values : 0 90 000 000 microseconds (0 90 seconds)

Gateway should generate and return Modbus Gateway exception message to

Master (Server) if no valid reply is not received from slave

Note - The reply timeout of Modbus Master must be greater than theGateway timeout. Otherwise the flow of request-reply communication isviolated. Gateway should not accept a new request before the reply fromslave is received or the reply timeout is elapsed.

8. GUARANTEE:

The designed life of the GPRS Router shall be 10 years. However, the GPRSRouter shall be guaranteed for a period of 60 months from the date of supply.

The GPRS Router, found defective, within guarantee period, shall be replacedwithin 24 working hours from the date of receipt of written intimation.

9. INSPECTION :

The inspection may be carried out by the purchaser's representative duringbefore dispatch.

All Acceptance tests and inspection shall be done at the place of the

manufacturer unless otherwise especially agreed upon by the Bidder andPurchaser at the time of purchase.


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The bidder shall provide the inspectors representing the purchaser allreasonable facilities without charge, to satisfy himself that the equipment isbeing furnished in accordance with this specification during inspection.

10. PACKING AND FORWARDING:

The equipment shall be packed in crates/cartons suitable for verticalhorizontal transport as the case may be and suitable to withstand handlingduring transport and outdoor storage during transit.

Each consignment shall be accompanied with a detailed packing listcontaining the following information.

10.1. Name of the consignee.

10.2. Details of consignment.

10.3. Destination.

10.4. Handling and packing instructions.

10.5. Bill of material indicating contents of each package.

The packing shall be done as per the manufacturer's standard practice.

However, the supplier should ensure the packing is such that, the material

should not get damaged during transit by Rail/Road/Sea/Air.

GM/P&D CGM/P&D CGM/Commercial CGM/MM

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Technical Specifications for Gprs Routers