Page 30 - Linde - HPR-02 Self regulating pump for open loop operation

Controllers. LEP. Load Sensing with electro-proportional flow limitation
and pressure cut-off

The HPR with LEP-controller offers an on-demand load sensing flow control. The actual volume flow, delivered by the pump can
be restricted by an electrical signal in certain points of operation. A pressure cut-off function protects the hydraulic system from
overload.
01 02 03 04 05 06 07 08 09 10 11
01 01
LEP mit Standard DA und Standard LS

02 Y LS P1 02
XD
S2 S1
03 03

D1
04 04
X
E P/E X T
05 05
P
0 max
06 06
T U L

07 07
Without any signal at the solenoid or the LS-port, the pump is swashed back to stand-by position. Both signals at the same time
are required for the pump to leave stand-by position. The actual swash angle of the pump is determined by the signal with the
HPR-02-A2-LEP0_Schaltplan_Katalog_v01
Projekt-Name:
Projekt-Titel:
lower target value. Dokument-Name: Schaltplan_LEP
08 Dokument-Titel: RA3 - P.Schlee 08
Projekt-Ersteller:
Dokument-Ersteller: 19.03.2012 09:50:09
RA3 - P.Schlee
Erstellt am:
Zuletzt gespeichert: 19.03.2012 10:38:48
05
08
07
06
01 02 The responding behaviour of the pressure cut-off can be remote-controlled by a hydraulic signal at the XD port as an option. S1 is
09
03
11
10
04
then equipped with an orifice and S2 is sealed. If only the mechanical preset of the PCO is used, S1 is sealed and S2 is not equipped.
Details, see <<Pump controllers with position feedback. P-axis>>
Characteristic LEP controller LEP-controller
2
XD
pmax
∆p

1
Qmax
1 Flow
2 Pressure
Maximum performance range of the pump
Actual power demand of the system
Regulating ∆p
Provided power
Pressure cut-off basic setting
Characteristic shifting by control signal
Electro-proportional flow setting

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