USER MANUAL – S203TA-D / S203RC-D
12
1.7.
S203RC-D Insertion types
Single phase insertion
Single phase insertion with VT
Aron insertion
Aron insertion with VTs
3-phase insertion with neutral
3-phase insertion with neutral with VTs
3-phase insertion without neutral
3-phase insertion without neutral with VTs
1.8.
Measures response time
S203TA-D (Typical):
63% IRMS 80 ms
100% IRMS 1000 ms
63% VRMS 100 ms
100% VRMS 960 ms
S203RC-D (Typical):
63% IRMS 40 ms
100% IRMS 1680 ms
63% VRMS 100 ms
100% VRMS 960 ms
Analog Output Response Time: Typical 10 ms (10-90%)
Modbus Response Time: Typical 5 ms
2.
S203TA-D Electrical Connections
DANGER!
Never open the secondary circuit of CT under applying current to load.
Never remove the terminal block under applying current to load, will cause electric shock or
breakdown CT
WARNING!
ARON
insertion without CTs it’s not allowed (two phases are short circuited!)
3-
PHASE insertion without CTs it’s not allowed (the phases are short circuited!)
You can’t connect the secondary of any CTs to the Earth.
Terminals 14, 16 18 and 22 are internally connected!
Use CT with the secondary side current is 5A
All CTs connected should be the same.
When connecting CT, connect the secondary side to the terminal of the main unit
first, and after that wire the primary side to a load electric wire. Incorrect order might
cause an electric shock or break CT.