Rockwell-automation 592- E300 Overload Relay User Manual Instrukcja Użytkownika Strona 105

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Rockwell Automation Publication 193-UM015B-EN-P - June 2014 105
Protective Trip and Warning Functions Chapter 5
Current Imbalance Inhibit Time
Current Imbalance Inhibit Time (Parameter 259) allows the installer to inhibit a
current imbalance trip and warning from occurring during the motor starting
sequence. It is adjustable from 0…250 s.
Table 89 - Current Imbalance Inhibit Time (Parameter 259)
Current Imbalance Trip
The E300 Electronic Overload Relay will trip with a current imbalance
indication if:
N
o trip currently exists
Current Imbalance Trip is enabled
Current is present
Current Imbalance Inhibit Time has expired
The Current Imbalance (parameter 52) is greater than the Current
Im
balance Trip Level for a time period greater than the Current Imbalance
Trip D elay.
If the E300 Electronic Overload Relay trips on a current imbalance, the:
T
RIP/WARN LED status indicator will flash a red 7-short blink pattern
Bit 6 in Current Trip Status (Parameter 4) will set to 1
Bit 0 in Device Status 0 (Parameter 20) will set to 1
Any relay outputs configured as a Trip Relay will open
Any relay outputs configured as a Control Relay will open
Any relay outputs configured as a Trip Alarm will close
An
y relay outputs configured as a Normal Relay will be placed in their Protection
Faul
t state (if so programmed).
Default Value 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Sec
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