ABB RET670 Product Manual page 48

Transformer protection RET670
Pre-configured
Product version: 1.1
Influencing factors
Table 15. Temperature and humidity influence
Parameter
Ambient
temperature, operate
value
Relative humidity
Operative range
Storage temperature
Table 16. 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 17. Frequency influence (reference standard: IEC 60255–6)
Dependence on
Frequency dependence, operate
value
Harmonic frequency
dependence (20% content)
Harmonic frequency
dependence for distance
protection (10% 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
r
f ± 3.0 Hz for 60 Hz
r
2nd, 3rd and 5th harmonic of f
2nd, 3rd and 5th harmonic of f
1MRK 504 091-BEN B
Nominal range
-10 °C to +55 °C
10%-90%
-
Within Influence
nominal range
12% 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
± 1.0%
r
± 6.0%
r
Issued: June 2010
Influence
0.02% /°C
-
-
ABB