Quadlogic RSM-5, Installation Manual

© COPYRIGHT

 2008          www.quadlogic.com 

© COPYRIGHT

 2008          www.quadlogic.com 

When reading the meter display, all consumption and demand values 
must be multiplied by the correct multiplier to calculate actual 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 
actual 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.  Table 7-1 
(using 0.1 AMP CTs) and Table 7-2 (using 5.0 AMP CTs) MUST be used to obtain 
actual consumption and demand readings.

Table 7-1. Multiplier table for RSM-5c and RSM-5 meter with 0.1 AMP CTs.  “XXX” represents 

voltage.

Chapter 

7

Reading the Display 

19

CT Rating

RSM5 XXX CL10
RSM5 XXX CL10 D
RSM5 XXX CL10 M D
RSM5 XXX CL10 RS D
RSM5 XXX CL10 PD
RSM5 480DTACL10 D
RSM5 480DTACL10MD
RSM5 480DTACL10RSD
RSM5 480DTACL10 PD
All RSM5 Kits

Meter Catalog Numbers

50A

100A
200A
400A
600A
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

Multiplier for 5.0A CT 

Table 7-2.  Multiplier table for RSM-5 meter with 5.0 AMP CTs.  “XXX” represents voltage.

How CT multipliers are calculated

0.1 Amp 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. 

5.0 Amp CTs
For CTs with 5.0A secondary ratings, the multipliers are derived by dividing 
the primary side rating by 5.  For example, a 200:5.0A-rated CT will have a 
multiplier of  200 ÷ 5, which is 40.

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.

    Failure to use the appropriate multiplier will result in an incorrect 

diagnosis of the meter’s functionality and incorrect revenue billing.

Chapter 7

- Reading the Display  -

20

CT Rating

 RSM5c XXX

 RSM5c XXX D

 RSM5c XXX PD

 RSM5c 480DTA

 RSM5c 480DTA D

 RSM5c 480DTA PD

 RSM5c XXX 2PH

 All RSM5c Kits

 RSM5 XXX 01A

 RSM5 XXX 01A D

 RSM5 XXX 01A M D

 RSM5 XXX 01A RS D

 RSM5 XXX 01A PD

 RSM5 480DTA01A D

 RSM5 480DTA01AMD

 RSM5 480DTA01ARSD

 RSM5 480DTA01A PD

Meter Catalog Numbers

50A

100A
200A
400A
600A
800A

1200A
1500A
1600A
2000A
3000A
3200A
4000A

x0.5
x1.0
x2.0
x4.0
x6.0
x8.0

x12.0
x15.0
x16.0
x20.0
x30.0
x32.0
x40.0

Multiplier for 

0.1A CT

RSM-5c

RSM-5