Linde HPR-2 - Controllers. TL2. Load Sensing with hyperbolic power limitation; TL2. LS with hyperbolic power limitation; TL2-characteristic curve; TL2-controller

29
The control principle with power limitation is used to optimize power utilization of the prime mover in applications where less
than the full power capacity is available for the hydraulic system. In addition to the load sensing function the HPR-02 TL2 offers
hyperbolic power limitation. The volume flow is limited when the set value is reached.
Controllers. TL2. Load Sensing with hyperbolic power limitation
TL2-characteristic curve TL2-controller
TL2. LS with hyperbolic power limitation
01
01
02
02
03
03
04
04
05
05
06
06
07
07
08
08
09
09
10
10
11
11
01
01
02
02
03
03
04
04
05
05
06
06
07
07
08
08
HPR-02-A2-TL20_Schaltplan_Katalog_v01
Projekt-Name:
Pr ojek t-Titel:
Dok ume nt-Tite l:
Dokument-Name:
Dokument-Ersteller:
Zuletzt gespeichert:
Projekt-Ersteller:
Erstellt am:
Schaltplan_TL2
RA3 - P.Schlee
RA3 - P.Schlee
16.03.2012 15:34:34
16.03.2012 15:45:19
LS
P
X
Z2
S4
X
Z1
D1
T
0 m ax
T
P
LU
TL2 mit Modeschaltung Z1 + Z2
2
∆p
Z1
Z2
1 Flow
2 Pressure
Maximum performance range of the pump
Actual power demand of the system
Regulating ∆p
Power limitation regulation begin
Power limitation basic setting
Characteristic shifting by control signal
Q
max
1
The TL2 controller offers a so called hydraulic power mode function. This means, that the regulation begin of the power limitation
/ torque control can be shifted from its mechanical basic setting by means of a remote control port Z1/Z2 at the controller. If the
regulation begin is intended to be below the basic setting, which means that the pump performance is reduced, then the port Z2
is used while S4 is closed. If the mode function is not used at all, or only with the Z1 port, S4 is equipped with an orifice. Z2 is then
sealed pressure tight. For details, see <<Pump controllers with position feedback. T-axis>>