Solare Datensysteme Solar-Log - Manual (Page 32)

32
Optional Connections
The current transformers have to be connected to the Meter interface with the secondary side.
Fig.: Two 6-pin terminal block connectors for the Meter interface
Solar-Log™ Meter 1
Interface PIN Description Label
Current transformer
Meter 1 1 Current transformer/CT 1a S1/k
2 Current transformer/CT 1b S2/i
3 Current transformer/CT 2a S1/k
4 Current transformer/CT 2b S2/i
5 Current transformer/CT 3a S1/k
6 Current transformer/CT 3b S2/i
Solar-Log™ Meter 2
Interface PIN Description Label
Current transformer
Meter 2 1 Current transformer/CT 1a S1/k
2 Current transformer/CT 1b S2/i
3 Current transformer/CT 2a S1/k
4 Current transformer/CT 2b S2/i
5 Current transformer/CT 3a S1/k
6 Current transformer/CT 3b S2/i
Characteristics of the Meter interface
The current transformer may not exceed a maximum output or secondary current of 200 mA. The input /
rated current is calculated by the maximum amount of power that is to be measured and has to be se-
lected for each measuring point. The current transformer's rated measuring ratio can be defined for each
current transformer input.
The current transformers have to be set up in a way so that only one current-carrying conductor is mea-
sured. Cables with multiple wires cannot be measured.
The maximum cable length between the current transformers and Solar-Log™ depends on the cable dia-
gram and the load of the current transformer.
We recommend a maximum cable length of 30 meters with a diameter of 0.75 mm 2 for our products.
For other current transformers, please consult the manufacturer's specifications in regard to cable length
and the wiring diagram.