Technical Data - ABB RELION REX640 Technical Manual

1MRS759142 C
7.1.10
7.2
7.2.1
7.2.2
7.2.3
REX640
Technical Manual

Technical data

Table 1198: SSCBR Technical data
Characteristic
Current measuring accuracy
Operate time accuracy
Travelling time measurement
Hot-spot and insulation ageing rate monitoring for
transformers HSARSPTR
Identification
Function description
Hot-spot and insulation ageing rate
monitoring for transformers
Function block
GUID-4392D6B8-A825-44C0-85A4-7E7D1E237CBE V1 EN
Figure 695: Function block
Functionality
The hot-spot and insulation ageing rate monitoring for transformers function
HSARSPTR is used for online monitoring of transformers. The function monitors the
hot-spot temperature of the transformer winding and the ageing rate of the insulation
caused by thermal stress. The function can be applied for new transformers as well as
for transformers already in service.
The hot-spot temperature and loss of life of transformer are calculated for one winding
of the transformer from three phase currents and RTD inputs for top oil temperature
and ambient temperature.
Condition monitoring functions
Value
±1.5% or ±0.002 × I
(at currents in the range of 0.1...10 × I
±5.0%
(at currents in the range of 10...40 × I
±1.0% of the set value or ±20 ms
+10 ms / -0 ms
IEC 61850 IEC 60617
identification identification
HSARSPTR 3Ihp>T
Section 7
n
)
n
)
n
ANSI/IEEE C37.2
device number
26/49HS
1271