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Controllers of the TL2 and ETP type offer a power limitation with a hyperbolical characteristic. The controller is set ex works to a
customer specific power limit value. The volume flow is restricted, when this limit is exceeded. By means of control ports at the
controller, the point at which the power limiter sets in can be raised, as well as lowered during operation.
Dependent on the rated size of the unit, there is a minimum value for the power limitation which must not be underrun, neither
by the ex work setting, nor by shifting. The maximum mechanically set value at which the power limitation sets in, is 250 bar,
independent of the pump's rated size and speed. The pump must never be operated with more than its maximum power.
Pump controllers with position feedback
Power limiter performance
T-Axis (TL2/ETP): hydraulic movement of the regulation begin
pZ [bar]
regulation begin
basic mechanical setting
20181614121086420
+150
+175
-100
-75
-50
-25
0
+25
+50
+100
+125
+75
1 Pilot pressure port Z1, Z2
2 Displacement of the regulation begin [bar]
Pilot pressure port Z1
Pilot pressure port Z2
Rated size
105 105 135 210
Ex works setting [kW] 9 - 106 12 - 136 19 - 184 32 - 221
Shifting of the regulation begin
[bar/bar]
Z1 7.1 7.1 7.4 7.8
Z2 -3.2 -3.2 -3.3 -3.4
Regulation begin minimum [bar] 60 60 80 80
Regulation begin maximum [bar], mechanically set 250
Max. pressure at Z1/Z2 [bar] 25
Power limiter characteristic curve Shifting of the regulation begin
2
Z1
Z2
1
1 Displacement
2 Pressure
Power range of the pump
Regulation begin power limitation
2
1
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