Siemens SIPROTEC 4 7UT6 Series Manual page 442

Technical Data
4.9 Thermal Overload Protection
Temperature Detectors
Number of measuring points
For hot-spot calculation one temperature detector must be connected.
Cooling
Cooling method
Oil exponent Y
Hot-spot to top-oil gradient Hgr
Annunciation Thresholds
Warning temperature hot-spot
or
Alarm temperature hot-spot
or
Warning ageing rate
Alarm ageing rate
442
from 1 RTD-box (up to 6 measuring points) or
from 2 RTD-boxes (up to 12 measuring points)
ON (oil natural)
OF (oil forced)
OD (oil directed)
1.6 to 2.0
22 to 29
98 °C to 140 °C
208 °F to 284 °F
98 °C to 140 °C
208 °F to 284 °F
0.125 to 128.000
0.125 to 128.000
Increments 0.1
Increments 1
Stufung 1 °C
Increments 1 °F
Increments 1 °C
Increments 1 °F
Increments 0.001
Increments 0.001
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016