Please, i need a meter based on the below specification, kindly select the most appropriate meter.
The following are the minimum technical specifications for the programmable electronic grid energy meters for installation at the Nigerian Electricity Grid/Trading Points-
Voltage: - 3x 11000/110V ,33000/110V, 132000/110 and 330000/110V.
Current: - 3 X -/1A 3 X -/1A, 3 X-/5A
Frequency: – 50Hz
System: - 3-Phase 3 wire (or 3-Phase 4 wire for 11,) 33, 132 and 330KV
Secondary voltage variation: 85V—135V
Supply frequency variation +5%
Internal Battery: - Lithium CR20255 –1HF or an equivalent giving a total
Stand-by life of 10 years (minimum)
Auxiliary Battery: - Embedded in the meter for down-loading stored
data during power outage
Operating Temp Range: - -15oc to 60oc
Storage Temp Range: - -15oc to +70oc
Humidity: - Annual mean 75% (for 30 days spread over one year, 95%)
Voltage Circuit: - 1.12W or 2.45VA
Current Circuit: - /5A Meter 0.12 VA
/1A Meter 0.02VA
Material:- The casing shall be for panel or wall mounting with fire retardant type of Bakelite or Polycarbonate.
Screws: - All Screws should be stainless steel or nickel – plated brass.
Current Terminals: Screw type 2 per terminal (6mm)
Cable size: 4.0mm2.
Voltage Terminals: Screw type: 1 per terminal (4mm)
Cable: 2.5mm2 .
Auxiliary Terminal: Screw type: 3mm
The name plate should contain the following:-
TARIFFICATION:- Time of use register
Maximum demand register
Integration period options: 15 min, 30 minutes etc.
End of billing dates etc.
The display should be capable of displaying Default, Customer and Utility modes.
- Battery backup operated display is required.
The meter should be able to monitor the following events among others:-
It should be capable of storing measured quantities as end-month historical values for up to 16 months.
REAL TIME CLOCK
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