GUARANTEED TECHNICAL PARTICULARS FOR THREE PHASE FOUR WIRE LT WHOLE CURRENT ELECTRONIC METERS Sl. No. 1. 2.
Item
Purchaser’s Requirement
Make Type
3 phase 4 wire, direct connected 230 / 240 V ( Phase to Neutral) 20 Amp (Basic current) 50 Hz ± 5 % 100 Amp. 0.1 % of Ib.
14. 15. 16.
Country of origin Application Rated Voltage Rated Current Frequency Maximum Current Capacity Minimum starting current in % of base current Overload capacity Loss in potential circuit Loss in current circuit Change in error due to : a. Variation in frequency b. Variation in temperature c. Variation in voltage Accuracy Class Total Weight of meter Details of case
17.
H.V. withstand
18.
Insulation Resistance
19.
Standard to which the meter confirm
to be specified
20.
Type of Energy Registration Mechanism. MD Reset Mechanism
to be specified
3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
20 21
22
23 24
25
Insulation Test ( Voltage 50Hz for 1Min) Temperature co-efficient from 10% of rated load to 100 % rated load ( 5°C to 45°C ) Working range Voltage Type of load (linear, non linear, balanced /unbalanced at any P.F.) Display details i. Display Cycle (descriptive
600% of Ib Specify Specify 50 Hz ± 5 % As per IS 13779 As per IS 13779 1.0 To be specified by the supplier Totally insulated Bakelite /Engineering plastic cover body or any other improved version of material. The advantage for using it may be specified. Earthing provision in case of wholly or partial metallic body. The meter should be ultrasonically welded. As per IS 13779 voltage in KV (RMS) ( Mention the KV for conducting & Insulating portions, separately) As per IS 13779
1.Through sealable push button 2.Through MRI. As per IS 13779
As per IS 13779
-30% to +20% of rated voltage All type of load.
Display on meter-
In order of display)
26
ii. Process of display (Automatic in cyclic manner / through push button. iii. Digits iv. Segments for display of one digit v. Period of display of each parameter Memory
27
Non volatile memory
28
Meter can be powered up by external power source in absence of Supply voltage
29
Abnormal event data preservation capacity
30
Multiplying factor (If meter is used for Different current ratio) Load Survey capability Parameter Logged
31 a.
LED TEST REAL TIME DATE ACTIVE ENERGY REACTIVE ENERGY APPARENT ENERGY RISING DEMAND WITH ET(KVA) MAX. DEMAND (KVA) MD RESET COUNT INST POWER FACTOR INST FREQUENCY INST VOLTAGE( R ,Y, B PHASE) INST CURRENT ( R,Y, B PHASE) INST ENERGY (KW,KVA,KVAR) TOD MAX. DEMAND TOD MD OF PREVIOUS BILLING PERIOD TOD ENERGY CUMULATIVE MAXIMUM DEMAND (KVA) PRESENT STATUS OF TAMPER LAST OCCURANCE OF TAMPER WITH DATE & TIME LAST RESTORATION OF TAMPER WITH DATE & TIME TOTAL NO OF ABONORMAL EVENTS POWER ON-HOURS Both options should be available.
Specify 7 (Seven) Should be sufficient to read & note ( around 10 sec.) Non volatile memory without battery back-up at least 12 years. Should be sufficient to store data of consecutive 12 billing periods with energy values- KWH, KVARH,KVAH; Maximum Demand Values – KVA, KW – with date and time of occurrences of MD. Date, time and type( push button, MRI, billing point) of MD Resets. To Specify
Should be able to store at least 150 ( occurrences and restoration are separate events) Scrolling type, First In First Out 1
KW, KVA, Voltage- Phase Voltage of each phase Current- Phase Current of each phase
b. c. d. 32 33
Logging interval No. of days of Load Survey MD logging Earthing Terminal Time of the day Zone
34
Capability for fraud Prevention & detection
35
Sealing and Locking Arrangement Type of communication
36
PF 30 Minutes 40 days 15 minutes As per IS 13779 4 time zones per day will be available for demand. 07:00 – 10:00 10:00 – 18:00 18:00 – 22:00 22:00 – 07:00 2 time zones per day will be available for all energy 06:00 – 22:00 22:00 – 06:00 1. Missing Potential and Potential imbalance, 2.Voltage- High/Low, 3. Current Imbalance, 4. CT Reversal, 5. CT short, 6. CT open, 7. Power On/Off, 8. High Neutral current / Neutral Disturbance 9. Over load / low load hrs. 10. External Magnetic Influence. Adequate sealing & Locking arrangements will be provided, to avoid tampering (Specify) Optical port- RS232.
37
Real Time Clock
38
Mandatory Spare parts a. Interfacing cords b. CMRI (DCD Software)
c. Base Computer System Software c. Others (if any)
Time Drift and adjustment facility with MRI to be specified. Specify As per CBIP Technical Report –111 40 numbers interfacing cords should be supplied. As per CBIP Technical Report –111 Provision should be made to implement the s/w in appox. 40 CMRIs- (RADIX and ANALOGIC). 2 sets of software should be supplied. ----
