©Measurlogic
Page 11
MQ0052-20C
7334 S. Alton Way, Centennial CO 80112
Tel: 877-777-6567 Tel: 303-805-5252 Fax: 425-799-4780
e-mail: [email protected]
web: www.measurlogic.com
A
B
C
Load 1
A
N
B
C
A
B
C
Load 2
3.2
Connecting Multiple Loads
The DTS 307 allows for ease and flexibility when monitoring multiple branches. The DTS 307 allows multiple CT
sensors to be connected in parallel via the green pluggable screw terminal.
When using parallel CT sensors, the following guidelines must be followed to ensure accurate measuring.
•
All CT sensors must have a 333mV output.
•
All CT sensors must be of the same manufacturer/model number and current rating.
•
A full set of CT sensors must be used for each load.
•
The pair of wires from the CT sensor to the green pluggable screw terminal must be twisted.
•
All CT sensors must be terminated at the green pluggable screw terminal.
•
A maximum of 3 loads can be monitored at once (Contact Measurlogic if more than 3 loads must be
monitored).
•
The measured phase current will be the total current across all the loads on that phase.
•
The CT primary rating for the DTS 307 must be set to the
CT rating * Number of CT sets.
•
The example below shows how to calculate the service current for figure 3.2.1.
Service Current for Figure 3.2.1
Number of CT Sensor Sets
2
CT Rating
100 Amps
CT Primary
200 Amps
Figure 3.2.1