Accuracy Of Power Measurement Functions; Technical Data; Redundant Station Bus Communication; Identification - Hitachi Relion 650 Series Technical Manual

Section 13
Station communication
13.7.6.4

Accuracy of power measurement functions

The power measurement functions (CVMMXN, CMMXU, VMMXU and VNMMXU) contain correction
factors to account for the nonlinearity in the input circuits, mainly in the input transformers, when
using direct analog connection to the IED.
The IED uses the same correction factors when feeding the IED with analog signals over IEC
61850-9-2(LE). Since the signals via IEC 61850-9-2(LE) are not subjected to the same nonlinearity
errors, this causes an inaccuracy in the measured values.
For voltage signals, the correction factors are less than 0.05% of the measured value and no angle
compensation, hence the impact on the reported value can be ignored.
For current signals, the correction factors cause a significant impact on the reported values at low
currents. The correction factors are +2.4% and -3.6 degrees at signal levels below 5% of the set
base current, +0.6% and -1.12 degrees at signal level 30% of the set base current and 0% and -0.44
degrees at signal levels above 100% of the set base current. Between the calibration points 5%, 30%
and 100% of the set base current, linear interpolation is used.
13.7.7

Technical data

Table 327: IEC 61850-9-2LE communication protocol
Function
Protocol
Communication speed for the IEDs
13.8

Redundant station bus communication

13.8.1

Identification

Function description
System component for parallel
redundancy protocol
13.8.2

Functionality

Redundant station bus communication according to IEC 62439-3 Edition 2 is available as option in
the IED. It uses both ports LAN1A and LAN1B on the COM03 module to connect to two redundant
networks using Parallel Redundancy Protocol (PRP).
13.8.3

Function block

D0E13918T201305151403 V1 EN-US
Figure 160: PRPSTATUS function block
360
PRPSTATUS
LAN1-A
LAN1-B
IEC13000011-1-en.vsd
© 2021 Hitachi Energy. All rights reserved.
Value
IEC 61850-9-2LE
100BASE-FX
IEC 61850 IEC 60617
identification identification
PRPSTATUS -
1MRK 511 557-UEN Rev. A
GUID-2521102E-1229-4796-A073-83F11C8D04F0 v1
GUID-D7474867-326C-44CD-B21E-BEE52756918F v1
D0E8296T201305151403 v1
D0E8094T201305151403 v1
ANSI/IEEE C37.2
device number
-
D0E8095T201305151403 v2
D0E8002T201305151403 v1
Technical Manual