Rockwell-automation 592- E300 Overload Relay User Manual Manual de usuario descargar pdf (Pagina 174)

174 Rockwell Automation Publication 193-UM015B-EN-P - June 2014

Chapter 5 Protective Trip and Warning Functions

Table 170 - Over kVAR Generated Trip Level (Parameter 400)

Over kVAR Generated Warning

The E300 Electronic Overload Relay will indicate an Over kVAR warning if:

• No warning currently exists

• Over kVAR Generated Warning is enabled

• Current is present

• Voltage is present

• Over kVAR Generated Inhibit Time has expired

• The total reactive power (kVAR) generated is equal to or greater than the

r kVAR Generated Warning Level

When the Over kVAR Generated Warning conditions are satisfied, the:

• TRIP/WARN LED will flash a yellow 2-long / 6-short blink pattern

• Bit 5 in Power Warning Status (Parameter 12) will set to 1

• Bit 1 in Device Status 0 (Parameter 20) will set to 1

• Any relay outputs configured as a Warning Alarm will close

Over kVAR Generated Warn Level

Over kVAR Generated Warn Level (Parameter 401) allows the user to define the

reactive power (kVAR) generated at which the E300 Electronic Overload Relay

will indicate a warning. It is user-adjustable from 0…2,000,000 kW.

Table 171 - Over kVAR Generated Warn Level (Parameter 401)

Default Value 0.000

Minimum Value 0.000

Maximum Value 2000000.000

Parameter Type DINT

Size (Bytes) 4

Scaling Factor 1000

Units kVAR

IMPORTANT

The Over kVAR Generated Inhibit Time starts after a phase voltage transitions

from 0V to 20V L-L and a phase of load current transitions from 0A to 30% of

the device’s minimum FLA setting. The E300 Electronic Overload Relay does not

begin monitoring for an over reactive power (kVAR) generated condition until

the Over kVAR Generated Inhibit Time expires.