ABB Relion REF615R - RMS Load Current;Angular Values Block; Table 12. Mitigations of Modbus Mappings for RMS Load Current;Angular Values Block; Figure 5. Snapshot on Scaling Load Current a from CMT to Read Primary Current in Ampere

1MRS240173-IB B Section 5
4x Registers
REF615R 33
DPU2000R Modbus Point List Mitigation Manual
5.1.3 RMS Load Current/Angular Values Block
REF615R has mapped the majority of load current/angular value registers the same as in
DPU2000R. The default scaling of the current and voltage readings are 100 as default, it
is because different from providing primary value in ampere or KV as DPU2000R Modbus
server did, REF615R Modbus server provides current and voltage readings as per unit.
To change the scaling of the default measurement readings in per unit to primary readings,
one can use PCM600 CMT tool to configure the scaling factors.
For example as shown in Figure 5, to read primary ampere of load current A at address
40257, one can change the signal's default scaling to 600 after finding out the CT's primary
ampere rating is 600A.
Figure 5: Snapshot on scaling load current A from CMT to read primary current in
ampere.
Another way is to remap the register for "Load Current-A" to a UDR as described in
Section 5.1.1.2.3 and Section 5.1.1.2.4.
Table 12: Mitigations of Modbus mappings for RMS load current/angular values block
REF615R provides another set of 6 system status registers (SSR1, SSR2,
SSR3, SSR4, SSR5, SSR6). REF615R also provides device information
registers. Please check "Feeder Protection and Control REF615R Modbus
Point List Manual", document ID1MRS240052-IB, and "REF615R
Modbus Communication Protocol Manual", document ID
1MRS240047-IB to find out more information.
DPU2000R
register
addr.
DPU 2000R description Scale
REF615R
register
addr.
Scale IEC 61850 path
Comments on
REF615R Modbus
points mapping
40257 Load Current A 1 40257 100 LD0.CMMXU1.A.phsA.instCVal.mag.f reading per unit value
by default
40258 Load Current A Angle 1 40258 1 LD0.CMMXU1.A.phsA.instCVal.ang.f
40259 Load Current B 1 40259 100 LD0.CMMXU1.A.phsB.instCVal.mag.f reading per unit value
by default
40260 Load Current B Angle 1 40260 1 LD0.CMMXU1.A.phsB.instCVal.ang.f
40261 Load Current C 1 40261 100 LD0.CMMXU1.A.phsC.instCVal.mag.f reading per unit value
by default
40262 Load Current C Angle 1 40262 1 LD0.CMMXU1.A.phsC.instCVal.ang.f
40263 Load Current N 1 40263 100 LD0.RESCMMXU1.A.res.instCVal.mag.f reading per unit value
by default
40264 Load Current N Angle 1 40264 1 LD0.RESCMMXU1.A.res.instCVal.ang.f