Datakom DPR-400 - Frequency Protection (Ansi 81); Thermal Overload Protection (Ansi 49 Rms)

DPR-400 User Manual Rev_01 Firmware V-1.0
- 46 -
Parameter Definition
Description
Factory Setting
F< SET
Parameters for level 1 low frequency protection
Inactive
F<< SET
Parameters for level 2 low frequency protection
Inactive
F> SET
Parameters for level 3 low frequency protection
Inactive
F>> SET
Parameters for level 4 low frequency protection
Inactive
Parameter Definition
Unit
Min
Max
Factory
Setting
Description
Function
-
0
2
0
0: Inactive
1: Constant Timer (DT)
2: Inverse Timer (IEC S)
Frequency Setting
Hz
10.0
120.0
45.0
Threshold for low frequency protection
Delay Timer
Sec
0.00
100.00
10.00
Time delay for low frequency protection.
Used for constant time protection.
TMS
-
0.5
100.0
1.0
Time multiplier for low frequency
protection. Used for inverse time
protection.
Dead Phase Protection
INH
-
0
1
1
0: Inactive
1: Active
If the voltage value of phase R is 0,
frequency protection is disabled.
Parameter Definition
Unit
Min
Max
Factory
Setting
Description
Characteristic
-
0
2
0
0: Off
1: Single Thermal Overload running
characteristic
Thermal Trip
In
0.08
4.00
1.00
Threshold value for thermal overload
Thermal Alarm
%
50
100
70
Alarm value before thermal overload
threshold. Entered as percentage of
threshold value.
Time Constant 1
Min
1
200
10
Time constant for thermal overload
protection. For more details, please
refer to “9.13. THERMAL OVERLOAD
(ANSI 49RMS)”.
12.8. FREQUENCY PROTECTION (ANSI 81U / 81O)
12.9. THERMAL OVERLOAD PROTECTION (ANSI 49RMS)