Motor Starting Time Supervision (Ansi 48) - Siemens Siprotec 7UM62 Manual

Multifunction generator, motor and transformer protection relay
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4 Technical Data
4.27

Motor Starting Time Supervision (ANSI 48)

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

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