Load-Jam Elements; Load-Loss Elements; Table 4.17 Load-Jam Function Settings; Table 4.18 Load-Loss Element Settings, No Voltage Option - Siemens SIMPRO-100 Instruction Manual

4
Settings Calculation
4.4.4

Load-Jam Elements

Setting
Setting Range
Prompt
Load Jam
OFF, 0.5 – 6.0 pu FLA
Trip Pickup
Load Jam
0.00 – 400.00 s
Trip Delay

Table 4.17 Load-Jam Function Settings

When the motor is running, the relay offers
load-jam detection. When the motor load jams,
stalling the motor, the phase current will increase
to near the locked rotor value. When Load Jam
Tripping is enabled, if the phase current exceeds
the Load Jam Trip Pickup setting for longer than
the time delay setting, the relay will trip. Set the
Load Jam Trip Pickup greater than the expected
normal load current but less than rated locked
rotor current. This setting is entered in per unit of
the Full Load Amps (FLA) setting.
4.4.5

Load-Loss Elements

4.4.5.1 Load-Loss Element, No Voltage
Option (Relay Models
SIMPRO-100-R or N-V)
Setting Prompt Setting Range
Load Loss Alarm OFF, 0.05 – 1.00 pu
Threshold FLA
Load Loss Trip 0.05 – 1.00 pu FLA LLTPU = 0.50
Threshold
Load Loss Starting 0 – 15000 s
Time Delay
Load Loss Alarm 0.00 – 400.00 s
Time Delay
Load Loss Trip 0.00 – 400.00 s
Time Delay
Table 4.18 Load-Loss Element Settings, No Voltage
Option
When the relay is not equipped with optional
voltage inputs, the load-loss detection function is
dependent on current alone. The relay arms the
load-loss detection logic a settable time after the
motor starts, as defined by the Load Loss
56
Starting Time Delay setting. Set this delay to
allow pumps or compressors to reach normal
load. Once armed, the function issues an alarm
Setting Name =
or trip if phase current drops below the alarm or
Factory Default
trip threshold for the specified time delay.
LJTPU = 2.0
Set the Load Loss Trip and Alarm thresholds
greater than the expected motor no load current
LJTDLY = 1.00
but less than the minimum current expected
when the motor is operating normally. These
settings are entered in per unit of the Full Load
Amps (FLA) setting.
If you expect the motor to operate at no load
normally, disable this function by setting LLAPU
equal to OFF. The relay automatically hides the
remaining load-loss settings.
4.4.5.2
Load Loss Alarm
Threshold
Load Loss Trip
Threshold
Load Loss Starting
Time Delay
Load Loss Alarm
Setting Name =
Time Delay
Factory Default
Load Loss Trip
LLAPU = OFF
Time Delay
a
Table 4.19 Load-Loss Element Settings, With Voltage
LLSDLY = 0
LLADLY = 5.00
When the relay is equipped with optional voltage
inputs, the load-loss detection function depends
LLTDLY = 10.00
on the power used by the motor. The relay arms
the load-loss detection logic a settable time after
the motor starts, as defined by the Load Loss
Starting Time Delay setting. Set this delay to
allow pumps or compressors to reach normal
load. Once armed, the function issues an alarm
or trip if three-phase power drops below the
Load-Loss Element, Voltage
Option Included (Relay Models
SIMPRO-100-R-V or N)
Setting Prompt Setting Range
OFF, 30 – 2000 W
30 – 2000 W
0 – 15000 s
0.00 – 400.00 s
0.00 – 400.00 s
Setting range shown for ITAP = 5 A. Range is 6-400 W when
ITAP = 1 A.
Option
SIMPRO-100
Setting Name =
Factory Default
a
LLAPU = OFF
a
LLTPU = 0.50
LLSDLY = 0
LLADLY = 5.00
LLTDLY = 10.00
PRIM-2400C