Quadlogic MiniCloset-5c, Installation Manual

Page: 114 / 117

BEFORE READING THE DISPLAY FOR ANY MC-5c PRODUCT
CAUTION: When reading the meter display, all consumption and demand values must be multiplied by the correct
multiplier to calculate true value. This includes all register values (kWh, kW, kVARHLg, kVARHLd, etc.) and Phase
Diagnostic values (real time Amps, Watts, etc.).
Volts, phase angle, frequency and power factor are displayed on the LCD as their true values and should not be
multiplied.
The multiplier value is dependent upon the ratio of the external Current Transformers (CTs) and can be different for
different meter points. Please consult Table 1 CT Multipliers for the appropriate value dependent upon the rating (or
size) of the CT.
HOW CT MULTIPLIERS ARE CALCULATED:
0.1AMP CTs
The multiplier values for CTs with 0.1A secondary ratings are derived by dividing the primary side rating by 100. For
example, a 50:0.1A-rated CT will have a multiplier of 50 ÷ 100, which is 0.50. A 100:0.1A rated CT will have a
multiplier of 100 ÷ 100 which is 1.
5AMP CTs
For CTs with 5A secondary ratings, the multipliers are derived by dividing the primary side rating by 5. For example,
a 200:5A-rated CT will have a multiplier of 200 ÷ 5, which is 40.
E XAMPLE:
Meter point with 400:0.1A CT
LCD reading for meter is 3422.119kWh
The correct cumulative consumption (kWh) for this meter is 13688.476 kWh.
(400 ÷ 100 = 4. Multiply face value for consumption and demand values by 4. 3422.119 x 4 =13688.476)
NOTE: Failure to use the appropriate multiplier will result in an incorrect diagnosis of the meter's
functionality and incorrect revenue billing.
x8.0
x12.0
x15.0
x16.0
x20.0
x30.0
x32.0
x40.0
800A
1200A
1500A
1600A
2000A
3000A
3200A
4000A
x10.0
x20.0
x40.0
x80.0
x120.0
x160.0
x240.0
x300.0
x320.0
x400.0
x600.0
x640.0
x800.0
FOR
240V
(Split-Phase)
x0.5
x1.0
Table 1. CT Multipliers
100A
200A
x20.0
x40.0
CT Rating
FOR
120V,
208V,
240V
(Wye),
277V,
347V,
416V,
480V,
600V
Meter
Voltage
Ratings
x0.5
x1.0
x2.0
x4.0
x6.0
50A
100A
200A
400A
600A
Multiplier for
5.0A CT
Multiplier for
0.1A CT