Automationdirect.com Stellar SR44, User Manual

Page: 109 / 238

5–35
‘Current’ Sub-menu of ‘Advanced’ Menu (continued)
C/L Time Out (‘Current’ sub-menu of ‘Advanced’ menu)
Range: P51/B1 Default: Off Scaling: n/a Type: R/W
The ‘C/L Time Out’ menu item turns ‘On’ and ‘Off’ the ‘Current Limit Time Out’ trip. A ‘Current
Limit Time Out’ trip will occur if this menu item is set to ‘On’, and the load is demanding more
current than the level specified in the ‘Current Limit’ parameter for longer than the time specified
in the ‘Limit Time Out’ parameter. If the ‘C/L Time Out’ menu item is set to ‘Off’, then no trip
would occur in a similar situation.
• Refer to “Current Limit Explanation Diagram”.
«•» This parameter bit is not available in Bypass Operation unless a user-supplied external current
transformer is installed. (Refer to P18/B2, ‘Auto Bypass’.)
C/L Level (‘Current’ sub-menu of ‘Advanced’ menu)
Range: 0.375 to 7.9688 xI
e
Default: 3.5 xI
e
Scaling: n/a Type: R/W
The ‘Current Limit Level’ parameter sets the level in Amps at which the unit will begin current
limiting.
• Refer to “Current Limit Explanation Diagram”.
«•» This parameter is not fully functional in Bypass Operation unless a user-supplied external
current transformer is installed. (Refer to P18/B2, ‘Auto Bypass’.)
C/L Time (‘Current’ sub-menu of ‘Advanced’ menu)
Range: 5 to 255 seconds Default: 30s Scaling: n/a Type: R/W
The ‘Current Limit Time’ parameter sets the time in seconds that the unit must be in a current limit
situation for a current limit trip to occur.
• Refer to “Current Limit Explanation Diagram”.
Current Limit Explanation Diagram
D
W
E
LL
,
R
U
N
, &
O
PT
IM
IZ
E
S
TA
R
T
R
A
M
P
Time
Note
3
Current
Limit
Level
I
LOAD
Notes
1. If I
LOAD
exceeds ‘Current Limit Level’ for time ‘Limit
Time Out’, and ‘C/L Time Out’ is on, the unit will trip at
the thick dotted line. If ‘C/L Time Out’ is off, the unit will
continue ramping until T.O.R. and then enter the Dwell
period.
2. If the unit current limits during start-up, the start time
will be elongated by the amount of time that the unit
was current limiting.
3. The actual current rises slightly above the level set
in ‘Current Limit’ because the unit manages the current
through control of the thyristor firing delay angle.
Limit Time Out
1
Start Time
2
(P-31)
(P-30)
(P51.B1)
Chapter 5: Keypad Menu Items and Parameters
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019