Rockwell-automation 592- E300 Overload Relay User Manual Instrukcja Użytkownika Pobierz pdf (Strona 98)

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

Chapter 5 Protective Trip and Warning Functions

Table 80 - Stall Trip Level (Parameter 250)

Jam Protection

A motor goes into a jam condition when a running motor begins to consume

current greater than50% of the motor’s nameplate rating. An example of this

condition could be an overloaded conveyor or jammed gear. These conditions

can result in the overheating of the motor and equipment damage. The E300

Electronic Overload Relay can monitor for this condition with its Jam Trip and

Warning function to detect for a rapid jam fault to minimize damage and loss of

production.

Jam Inhibit Time

Jam Inhibit Time (Parameter 251) allows the installer to inhibit a jam trip and

warning from occurring during the motor starting sequence. It is adjustable from

0…250 s.

Table81‐JamTripInhibitTime(Parameter251)

Stall Trip Level (Parameter 250)

Default Value 600

Minimum Value 100

Maximum Value 600

Parameter Type UINT

Size (Bytes) 2

Scaling Factor 1

Units %FLA

IMPORTANT

Stall Protection is only enabled during the motor starting sequence. If the

maximum phase of load current falls below the programmed Stall Trip Level

before the Stall Enabled Time elapses, the E300 Electronic Overload Relay

disables Stall Protection until the next motor starting sequence.

IMPORTANT

The E300 Electronic Overload Relay considers a motor to have begun its

starting sequence if the maximum phase of motor current transitions from 0A

to approximately 30% of the device’s minimum FLA Setting.

Default Value 10

Minimum Value 0

Maximum Value 250

Parameter Type USINT

Size (Bytes) 1

Scaling Factor 1

Units Sec

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 423 424

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Rockwell-automation 592- E300 Overload Relay User Manual Instrukcja Użytkownika Strona 98