Conventional instrument transformers
Each terminal for CTs/VTs is dimensioned for one 0.5...6.0 mm2 (AWG 20-10) wire or for two wires of maximum 2.5 mm2 (AWG 14).
Connect the wires from the CTs/VTs to the correct device according to the phase order and the connection diagram.
Sensors (non-conventional instrument transformers)
Current measurement is based on Rogowski coil and voltage measurement is based on voltage divider. Both current and voltage measurements interface the relay via one RJ45 connector per phase. There are two different sensor input modules available, supporting different IEC standards and having different RJ45 connector pin lay-out.
SIM1901 supporting IEC 60044
SIM1902 supporting IEC 61869
There are a number of sensor interface adapters available which can be used to connect the sensors to the relay, supporting different scenarios both in green field and retrofit cases. More information can be found in Sensor accessories
Figure 1. AIM1001 moduleimage/svg+xml 57-240V N VT1 57-240V N VT2 57-240V N VT3 57-240V N VT4 57-240V N VT5 1/5A N CT1 N CT2 N CT3 N CT4 N CT5 (for residual X1 X2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1/5A 1/5A 1/5A 0.2/1A S1 S2 P2 P1 S1 P1 P2 S2 Positive Load flow Direction AIM1001 n a da dn A n L1L2L3 L1 L2 L3 current only) Figure 2. AIM1001 module (two phase-to-phase VTs)image/svg+xml 57-240V N VT1 (Vab) 57-240V N VT2 (Vbc) 57-240V N VT3 (Vca) 57-240V N VT4 57-240V N VT5 1/5A N CT1 N CT2 N CT3 N CT4 N CT5 (for residual X1 X2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1/5A 1/5A 1/5A 0.2/1A S1 S2 P2 P1 S1 P1 P2 S2 Positive Load flow Direction AIM1001 L1L2L3 current only) ca ABC Figure 3. AIM1002 moduleimage/svg+xml 57-240V N VT1 57-240V N VT2 57-240V N VT3 57-240V N VT4 CT1 1/5A N CT2 N CT3 N CT4 N CT5 N CT6 X1 X2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1/5A 1/5A 1/5A 1/5A S1 S2 P2 P1 S1 P1 P2 S2 Positive Load flow Direction AIM1002 n a dadn A n L1L2 L3 L1 L2 L3 1/5A N Figure 4. AIM1002 module (two phase-to-phase VTs)image/svg+xml 57-240V N VT1 (Vab) 57-240V N VT2 (Vbc) 57-240V N VT3 (Vca) 57-240V N VT4 CT1 1/5A N CT2 N CT3 N CT4 N CT5 N CT6 X1 X2 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1/5A 1/5A 1/5A 1/5A S1 S2 P2 P1 S1 P1 P2 S2 Positive Load flow Direction AIM1002 L1L2 L3 1/5A N ca ABC Figure 5. SIM1901 module (VT primary connection phase-to-earth)image/svg+xml N VT N CT X4 1 2 57-240 0.2/1A S1 P1 P2 S2 Positive Current Direction L1L2L3 SIM1901 X1 4 5 7 8 DFF Sensor I Sensor U DFF X2 4 5 7 8 DFF DFF X3 4 5 7 8 DFF DFF 3 4 Sensor I Sensor U Sensor I Sensor U s1 s2 s1 s2 s1 s2 (for residual current only) Figure 6. SIM1901 module (VT primary connection phase-to-phase)image/svg+xml N VT N CT X4 1 2 57-240 0.2/1A S1 P1 P2 S2 Positive Current Direction L1L2 L3 SIM1901 X1 4 5 7 8 DFF Sensor I Sensor U DFF X2 DFF DFF X3 DFF DFF 3 4 Sensor I Sensor U Sensor I Sensor U s1 s2 s1 s2 s1 s2 (for residual current only) 4 5 7 8 4 5 7 8 Figure 7. SIM1902 module (VT primary connection phase-to-earth)image/svg+xml N VT N CT X4 1 2 57-240 0.2/1A S1 P1 P2 S2 Positive Current Direction L1L2L3 SIM1902 X1 1 2 7 8 DFF Sensor I Sensor U DFF X2 1 2 7 8 DFF DFF X3 1 2 7 8 DFF DFF 3 4 Sensor I Sensor U Sensor I Sensor U s1 s2 s1 s2 s1 s2 (for residual current only) Figure 8. SIM1902 module (VT primary connection phase-to-phase)image/svg+xml N VT N CT X4 1 2 57-240 0.2/1A S1 P1 P2 S2 Positive Current Direction L1L2 L3 SIM1902 X1 1 2 7 8 DFF Sensor I Sensor U DFF X2 DFF DFF X3 DFF DFF 3 4 Sensor I Sensor U Sensor I Sensor U s1 s2 s1 s2 s1 s2 (for residual current only) 1 2 7 8 1 2 7 8