ABB RET670 Product Manual page 48

Transformer protection RET670 ANSI
Pre-configured
Product version: 1.2
Influencing factors
Table 17. Temperature and humidity influence
Parameter
Ambient temperature,
operate value
Relative humidity
Operative range
Storage temperature
Table 18. Auxiliary DC supply voltage influence on functionality during operation
Dependence on
Ripple, in DC auxiliary voltage
Operative range
Auxiliary voltage dependence, operate
value
Interrupted auxiliary DC voltage
Interruption interval
0–50 ms
0–∞ s
Restart time
Table 19. Frequency influence (reference standard: IEC 60255–1)
Dependence on
Frequency dependence, operate value
Frequency dependence for distance protection
operate value
Harmonic frequency dependence (20%
content)
48
Reference value
+20 °C
10%-90%
0%-95%
-40 °C to +70 °C
Reference value
max. 2%
Full wave rectified
Within nominal range
f ± 2.5 Hz for 50 Hz
n
f ± 3.0 Hz for 60 Hz
n
f ± 2.5 Hz for 50 Hz
n
f ± 3.0 Hz for 60 Hz
n
2nd, 3rd and 5th harmonic of f
Nominal range
-10 °C to +55 °C
10%-90%
-
Within nominal Influence
range
15% of EL 0.01% /%
± 20% of EL 0.01% /%
24-60 V DC ± 20%
90-250 V DC ± 20%
No restart
Correct behaviour at power down
<180 s
Influence
± 1.0% / Hz
±2.0% / Hz
± 1.0%
n
1MRK 504 118-BUS A
Influence
0.02% /°C
-
-
ABB