Transcript
DAKSHIN HARYANA BIJLI VITRAN NIGAM Office 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 relevant standards and Specifications, for the required functioning which is explained in 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 EMC emission Hazards from the electrical equipments in which the device is housed. 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 circles of DHBVN. 1.3. GPRS devices shall be used to control, communicate and schedule the electrical Substation, Distribution Transformers, Energy Meters, Numeric relays, Battery chargers, Cameras, etc 1.4. GPRS Devices shall be capable of communicating with different protocols only by changing the firmware. Required Protocols are Modbus, 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
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CLIMATIC CONDITIONS The GPRS Router shall be suitable for satisfactorily working under the following climatic conditions: -
3.
Max. Ambient Temperature
700 C
Min. Ambient Temperature
- 50 C
Max. Relative Humidity
100 %
Min. Relative Humidity
26 %
Altitude
Below 1000 meters above mean sea level.
SUPPLY SYSTEM: Supply Voltage
240V AC 3x240V AC (Phase to Neutral), 415V AC (Between phases)
Voltage variation range
-40% to +20%
Frequency
50Hz +/- 5%
Power Factor
+1 to -1 2
4.
Design and Purpose: 4.1. The GPRS units are used to control, monitor and schedule the circuits of a substation, distribution transformer. The circuit is switched ON or OFF depending on the system requirement. Such GPRS units are installed on all such breakers where load management control is required. By this the total load on the feeders also comes down besides controlling usage of energy by individual circuits. 4.2. Such a system has become necessary to control and effective usage of loads. 4.3. At present, loads are controlled by switching ON/OFF the breakers manually. 4.4. The proposed system envisages control of LT / HT circuits by simple adding on External I/O’s attached to the GPRS Routers. The I/O should be through an interposing auxiliary relay of suitable rating to provide safety to the output equipment. 4.5. Aux contacts of the breakers / equipments should be wired back to the GPRS Device I/O’s for field positions. The device shall compare the status of the contact with the logical status of the breakers and generate a “Failed to operate ” Message alarm in case of mismatch. 4.6. GPRS Router shall be capable of storing the required predetermined time schedules. The time schedules are likely to change as per requirement depending on NIGAM’s requirement. 4.7. GPRS Router shall capture the total hours of power supply provided to each 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 by communicating and acquiring all the necessary details from the Energy meter.
5.
Applicable Standards: The GPRS units shall be manufactured to confirm to following relevant standards of Bureau of Indian Standard (IS) or any other international standard.
6.
GPRS Interface & Controller: 6.1. The GPRS Router shall operate on 10 – 30 VDC supply and shall be safe 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 typical programs or schedules 6.3. It shall be possible to change schedules from a remote place by feeding the 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 remote place. 6.4. It should be easily possible to load the program at site by using an Laptop. 6.5. The GPRS Router shall be suitable for operation in outdoor, housed in a metal box and shall be capable of with standing temperature variation from -50C to +700C and having Relative Humidity from 30 – 95% without condensation. 6.6. Electromagnetic Compatibility for Electro static discharge and radiated electromagnetic 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.
IEC 801-3: 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 and Signal cables
6.7. The GPRS Router shall be protected against system surges and harmonics at the input side. 6.8. The GPRS Router shall have communication capability of different protocols with RS 485 Inbuilt serial PORT for data acquisition from the meters and IEC 60-870-5-104 remote communication. 6.9. The GPRS Router shall function without error even if there has been a power interruption of 30 days after installation. 6.10. GPRS Router based system should be able to communicate with the energy meter in the substations and capable of processing the following parameters. 6.10.1. Maximum and Minimum current during the month, Phase wise for all three phases. 6.10.2. Maximum and minimum voltage during the month, phase wise for 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 Mobiles Control Station/SCADA over GPRS. A PC executing Programming software can be connected to a controller thru GPRS Interface or M2M Gateway for transferring applications, animating objects and executing operator mode commands. 6.12. The GPRS Router System shall be suitable for satisfactory performance with 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 memory 32 MB SDRAM memory Power 6 – 26 VDC nominal input voltage 1 – 5 W power consumption Resettable fuse and ESD protection Other Built-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-45 1,5 kV isolation transformer Ethernet IEEE 802-3, 802-2 GPRS Internal module and SIM card socket Compliant to GSM phase 2/2+ FME external antenna connector (50 Ω) Dual-band EGSM 900(2W) and GSM 1800 GPRS GPRS multi-slot class 10 GPRS mobile station class B 85.6 kbps GPRS downlink speed 21.4 kbps GPRS uplink speed Coding schemes CS1, CS2, CS3, CS4 USSD Support Serial Ports Serial port # 1 / Console RS-232 DTE, Male DB-9 connector Full serial and modem signals Speed 300 – 460 800 bps Data bits – 7 or 8, stop bits - 1 or 2 Parity - None, Even, Odd Flow control – None, RTS/CTS Protection – 15 kV ESD and short circuit Console – 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 connector Full serial and modem signals Biasing and termination selectable Speed 300 – 460 800 bps Data bits - 7 or 8 Stop bits - 1 or 2 Parity - None, Even, Odd 6
Flow control – None, RTS/CTS Protection – 15 kV ESD and short circuit Software Network Protocols PPP, IP, ICMP, UDP, TCP, ARP, DNS, DHCP, FTP, TFTP, HTTP, POP3, SMTP Tunneling (Virtual Private Networking - VPN) SSHv2 server and client SSHv1 server and client VPN using SSH protocol Authentication with 1024-bit RSA key Encryption with 3DES
Management WWW, SSH, Telnet and console FTP, TFTP and HTTP software update Routing Related Static routing, proxy ARP, port forwarding, IP masquerading/NAT, firewall Serial Device Connectivity Device server application AT modem emulation Built-in web server and preconfigured pages for diagnostics using browser Network/Remote upgradeable software Firewall LAN to GPRS GPRS to LAN GPRS to Router The Router with Modbus gateway shall have following settings Gateway Status User selectable Modbus gateway functionality enabled/disabled for the serial port Each serial port of should have it’s own Modbus Gateway definitions Gateway Mode User defined slaves location on network or serial side Network Master to Serial Slaves – Slaves are on serial side Serial Master to Network Slaves – Slaves are on network side Note - If slaves are on network side also routes are needed to be defined 7
Serial Protocol Different the Modbus protocol used on serial communication Modbus RTU – Serial devices use Modbus RTU protocol Modbus ASCII – Serial devices use Modbus ASCII protocol Note - Modbus RTU is more efficient and should be used whenever possible Network Protocol Modbus TCP – Modbus TCP protocol over TCP Modbus RTU over TCP – Modbus RTU protocol over TCP Modbus RTU over UDP – Modbus RTU protocol over UDP Modbus ASCII over TCP – Modbus ASCII protocol over TCP Modbus ASCII over UDP – Modbus ASCII protocol over UDP Note - Since M2M Gateway is being used to tunnel network traffic over SSH use Modbus 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/gateway waits the response from Modbus slave (Secure/other Meters). If the response is 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 the Gateway timeout. Otherwise the flow of request-reply communication is violated. Gateway should not accept a new request before the reply from slave is received or the reply timeout is elapsed.
8.
GUARANTEE: The designed life of the GPRS Router shall be 10 years. However, the GPRS Router shall be guaranteed for a period of 60 months from the date of supply. The GPRS Router, found defective, within guarantee period, shall be replaced within 24 working hours from the date of receipt of written intimation.
9.
INSPECTION : The inspection may be carried out by the purchaser's representative during before dispatch. All Acceptance tests and inspection shall be done at the place of the manufacturer unless otherwise especially agreed upon by the Bidder and Purchaser at the time of purchase.
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The bidder shall provide the inspectors representing the purchaser all reasonable facilities without charge, to satisfy himself that the equipment is being furnished in accordance with this specification during inspection. 10.
PACKING AND FORWARDING: The equipment shall be packed in crates/cartons suitable for vertical horizontal transport as the case may be and suitable to withstand handling during transport and outdoor storage during transit. Each consignment shall be accompanied with a detailed packing list containing 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
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CGM/MM
