Siemens SIPROTEC 7UM62, Manual

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4 Technical Data
442
7UM62 Manual
C53000-G1176-C149-3
4.27 Motor Starting Time Supervision (ANSI 48)
Setting Ranges/
Increments Motor Starting Current I
STARTUP
0.50 A to 80.00 A
1
) (Increments 0.05 A)
1
)
Pickup Threshold I
MOTOR START
3.00 A to 5.00 A
1
) (Increments 0.05 A)
1
)
Permissible Starting Time T
STARTUP
1.0 s to 180.0 s (Increments 0.1 s)
Permissible Locked
Rotor Time
T
LOCKED_ROTOR
0.5 s to 120.0 s (Increments 0.1 s)
or
∞
(step is ineffective)
Trip Time Charac-
teristic
Dropout Ratio
I
rms
/
I
MOTOR START
approx. 0.95
Tolerance Pickup Threshold 1 % of set value, or 50 mA
1
)
Time Delay 5 % or 30 ms
Influencing Vari-
ables for Pickup Power Supply Direct Voltage in Range
0.8
≤
U
PS
/ U
PS nominal
≤
1.15 1 %
Temperatur in range
23 °F
≤ ϑ
amb
≤
131 °F 0.3 % / 10 °F
–5 °C
≤ ϑ
amb
≤
55 °C 0.5 % / 10 K
Frequency in range
0.95
≤
f/f
N
≤
1.05 < 1 %
Harmonic currents
– Up to 10 % 3. Harmonic
< 1 %
– Up to 10 % 5. Harmonic < 1 %
1
) for I
N
= 1 A, divide all limits and increments by 5.
t
I
STARTUP
I
rms
------------------------
è ø
æ ö
2
T
STARTUP
⋅
=
Trip Time Characteristics
I
STARTUP
Motor starting current setting
I
rms
Actual current flowing
I
MOTOR START
Pickup threshold setting,
used to detect motor startup
t Trip time in seconds
Meaning:
for I
rms
> I
MOTOR START