Response Time, Mdc 045/053; Neutral Start Switch (Nss) - Danfoss H1P 045 Technical Information

Technical Information
H1 Axial Piston Single Pumps, Size 045/053
Control Options
22 | © Danfoss | May 2017
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
Viscosity and temperature
Charge pressure
Speed

Response time, MDC 045/053

Code
Orifice description (mm)
P A
– –
C3
– –
C6
– –
C7
0.8 –
C8
1 –
C9
1 –
D1
1.3 –
D2
1.3 –
D3
1.3 1.3
D4
0.6 0.8
D5

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
M14
M5
M4
Neutral Start Switch data
Max. continuous current with switching
Max. continuous current without switching
Max. voltage
Electrical protection class
250 bar [3626 psi]
30 mm²/s [141 SUS] and 50 °C [122 °F]
20 bar [290 psi]
-1
1800 min (rpm)
B
Tank (A+B) Neutral to full flow
– – 0.3
– 1 0.9
– 1.3 0.6
– 0.6 2.9
– 0.6 2.7
– 0.8 1.7
– 0.8 1.5
– 1 1.1
1.3 1 1.3
0.8 0.6 5.4
M3
P005 702
8.4 A
20 A
36 V
DC
IP67 / IP69K with mating connector
Stroking direction (sec)
Full flow to neutral
0.4
0.8
0.6
2.0
1.9
1.2
1.1
0.8
1.0
2.8
11063344 | BC00000059en-US1001