Datakom DPR-400 - Cold Load Pickup

DPR-400 User Manual Rev_01 Firmware V-1.0
- 48 -
This feature is used to prevent unnecessary trips which may occur in cases where the load is powered up
suddenly after remaining unpowered for a long period of time. Only valid for “OVERCURRENT
PROTECTION (ANSI 50/51)” and “GROUND OVERCURRENT PROTECTION (ANSI 50N/51N)”. The
protections are valid for the parameter group defined in this section for a set duration after the system has
been energized.
Parameter Definition
Description
Factory Setting
CLP I> SET
Parameters for level 1 cold load pickup.
Inactive
CLP I>> SET
Parameters for level 2 cold load pickup.
Inactive
CLP I>>> SET
Parameters for level 3 cold load pickup.
Inactive
CLP I>>>> SET
Parameters for level 4 cold load pickup.
Inactive
CLP IN1> SET
Parameters for ground overcurrent cold load
pickup
Inactive
CLP I Hot
CLP I Cold
Parameter Definition
Unit
Min
Max
Factory
Setting
Description
CLP I Hot In
In
0
0.5
0
If a current is measured which is
higher than the configured In value
upon energizing, TCLPTD condition
starts. If this parameter is set to 0,
TCLPTD conditions checks breaker
position.
CLP I Cold In
In
0
0.5
0
If a current is measured which is lower
than the configured In value upon
deenergizing, TCOLDTD condition
starts. If this parameter is set to 0,
TCOLDTD condition checks breaker
position.
TCOLDTD
Sec
0
14400
7200
If the load is not energized for this
period, it is designated as cold load.
TCLPTD
Sec
0
14400
7200
The cold load condition is removed
after this period is elapsed upon
energizing.
I>1 Status
-
0
1
0
Active for level 1 protection
I>1 Current Setting
In
0.08
4.00
1.50
Current threshold for level 1 protection
I>1 Delay Timer
Sec
0.00
100.00
1.00
Constant time delay for level 1
protection.
I>1 TMS
-
0.025
1.200
1.000
Time multiplier for level 1 protection
IEC curves
I>1 Time Dial
Sec
0.5
15.0
7.0
Time multiplier for level 1 protection
IEEE curves
12.12. COLD LOAD PICKUP