Quadlogic MiniCloset-5c, Installation Manual

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Chapter 6 Applying Multipliers
© COPYRIGHT 2009
Quadlogic Controls Corporation
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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. (Except
for 240V MC-5c meters.)
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.
(Except for 240V MC-5c meters.)
Example:
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)
The multiplier must be applied when calculating both kW and kWH readings on every screen
displayed on the LCD.
A 240V split-phase MiniCloset-5 meter is the ONLY meter type that has a different multiplier
structure (as shown in Table 6.2). This is due to the fact that internal multipliers were
already applied in the meter during the calibration process.
Failure to use the appropriate multiplier will result in an incorrect diagnosis of the meter’s
functionality and incorrect revenue billing.