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Section 7
1MAC050144-MB C
Control functions
530
615 series ANSI
Technical Manual
7.3.9
Technical data
Table 435: 25 technical data
7.4
Emergency startup 62EST
7.4.1
Identification
7.4.2
Function block symbol
Figure 291:
Function block
7.4.3
Functionality
An emergency condition can arise in cases where the motor needs to be started despite
knowing that this can increase the temperature above limits or cause a thermal overload
that can damage the motor. The emergency start function 62EST allows motor startups
during such emergency conditions. 62EST is only to force the IED to allow the restarting
of the motor. After the emergency start input is activated, the motor can be started
normally. 62EST itself does not actually restart the motor.
The function contains a blocking functionality. It is possible to block function outputs,
timer or the function itself, if desired.
Characteristic
Value
Pickup accuracy
Depending on the frequency of the voltage measured: f
n
±1 Hz
Voltage: ±3.0% of the set value or ±0.01 xV
n
Frequency: ±10 mHz
Phase angle: ±3°
Reset time
< 50 ms
Reset ratio
Typical 0.96
Trip time accuracy in
definite time mode
±1.0% of the set value or ±20 ms
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Emergency start function
ESMGAPC
ESTART
62EST
Содержание 615 Series ANSI
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