The Keypad and Display Interface Perfect Harmony GENIII/e User’s Manual
3-24 A1A19000405A: Version 1.3
3
Table 3-8: Limits Menu (1120)
Parameter ID Units Default Min Max Description
Overload select 1130 Constant
Selects the type of motor thermal over-
load protection from:
Constant (fixed current-based): Use
when only current limit based alarm is
required.
Straight Inverse Time (motor model
used to estimate temperature)
: Motor model assumes the allowable
motor load to be 100% for the entire
speed range.
Inverse Time with thresholds (motor
model used to estimate temperature)
Motor model uses allowable load data
from the speed derate curve.
Overload pending 1139 % 100.0 10.0 210.0
Sets the overload level (in % of rated)
at which an alarm is generated. The
pending level corresponds to a current
level with Constant method and to a
motor temperature level with the other
two TOL methods.
Overload 1140 % 120.0 20.0 210.0
Sets the overload level (in % of rated)
at which an alarm is generated. The
pending level corresponds to a current
level with Constant method and to a
motor temperature level with the other
two TOL methods.
Overload timeout 1150 sec 60.0 0.01 300.0
When output of the TOL model
exceeds the overload level for the tim
-
eout period, a fault is generated.
Speed Derate Curve 1151 Submenu
This menu sets allowable motor load
as a function of speed. See Table
3-9.
Motor trip volts 1160 V 4800 5 20,000 Sets the motor over-voltage trip point.
Maximum Load
Inertia
1159
Kgm
2
0.0 0.0 500000.0
Sets the maximum load inertia that the
motor can line start without exceeding
maximum temperature. Set this param
-
eter only if the motor does not con-
form to NEMA MG-1, Part 20, Table
20-1.
Overspeed 1170 % 120.0 0.0 250.0
Sets the motor overspeed trip level as a
percentage of rated speed.
To Next Page
Loading...
