Inqury for Energy Meters Pre-paid

RFQ Description

5.10 Energy meters5.10.1 Prepaid MetersPrepaid meters shall be used. The Works include the delivery and installation of one completemanagement system (vending station) in every project area (district) as shown the scope of work.Design RequirementsThe prepayment meters shall operate with unique codes coded by an external coding unit, entered bythe consumer at a MMI consisting of a keypad.The prepayment meters shall be designed for a secure coding of their initial settings by the Employer.No unauthorised access to the meter or to this initial information shall be possible.It shall be possible for the Employer to read and write the information without having to apply power tothe meter.The meters shall operate, as uniquely coded units without need for any further modifications.Prepayment meters shall comply with the following requirements:Accuracy Class : 2 for single phase, 1 for three-phaseBasic Current Ib, (Imax) : 10 (60) A single phase, 20 (100) A three phaseReference Voltage Un : 230 V single phase, 400 / 230 V three-phaseActive Power Consumption (W) : 4 (if no earth fault protection) 2, 5 (if earth fault protection)Power indication : By a light emission lamp or an active displayCredit display : Continuous, showing: How many units are left No credit available FaultPower limitation :Automatic disconnection of the load, if the averagepower consumed exceeds the maximum allowed Over-current protectionOperating voltage : Un (+ 10%, - 20 %)Employer Specific RequirementsPage 38 of (38)Tanzania Electric Supply Co. LtdRural Electrification ProjectsTender Documents Vol. 2 of 2 - Employers RequirementsWhen the supply voltage is removed from the prepayment meter or drops below 80 % of the ratedvoltage, the meter may disconnect the load, provided that the meter automatically re-connect the loadwhen the voltage increases above 80 %.The prepayment meters shall: contain an identification of manufacturing and repair electric energy meters, pre-paid Energy Meters Pre-paid