H1 pumps are limited in mechanical orificing combinations. Mechanical servo orifices are to be used only
for fail-safe return to neutral in the event of an electrical failure.
Typical response times at the following conditions:
∆p
250 bar [3626 psi]
Viscosity and temperature
30 mm²/s [141 SUS] and 50 °C [122 °F]
Charge pressure
20 bar [290 psi]
Speed
1800 min
-1
(rpm)
Response time, MDC 045/053
Code
Orifice description (mm)
Stroking direction (sec)
P
A
B
Tank (A+B)
Neutral to full flow
Full flow to neutral
C3
–
–
–
–
0.3
0.4
C6
–
–
–
1
0.9
0.8
C7
–
–
–
1.3
0.6
0.6
C8
0.8
–
–
0.6
2.9
2.0
C9
1
–
–
0.6
2.7
1.9
D1
1
–
–
0.8
1.7
1.2
D2
1.3
–
–
0.8
1.5
1.1
D3
1.3
–
–
1
1.1
0.8
D4
1.3
1.3
1.3
1
1.3
1.0
D5
0.6
0.8
0.8
0.6
5.4
2.8
Neutral Start Switch (NSS)
The Neutral Start Switch (NSS) contains an electrical switch that provides a signal of whether the control
is in neutral. The signal in neutral is Normally Closed (NC).
Neutral Start Switch schematic
P005 702
M14
M5
M4
M3
Neutral Start Switch data
Max. continuous current with switching
8.4 A
Max. continuous current without switching
20 A
Max. voltage
36 V
DC
Electrical protection class
IP67 / IP69K with mating connector
Technical Information
H1 Axial Piston Single Pumps, Size 045/053
Control Options
22 |
©
Danfoss | May 2017
11063344 | BC00000059en-US1001
