Instruction manual

Issue H Oct 04
PAGE
6
GV Dry Vacuum Pumps
TECHNICAL DATA
6
2.4 Electrical data
2.5 Cooling system
Electrical supply 380/400/415 V, 50 Hz or 230/460 V, 60 Hz
Thermal snap-switch contact ratings
Maximum voltage
Maximum load (inductive)
Maximum current (resistive load)
240 V
120 VA
12 A
Pump motor rating
50 Hz electrical supply
60 Hz electrical supply
GV250
11.0 kW
20 h. p.
GV400
18.5 kW
30 h. p.
Full load current
230 V, 60 Hz electrical supply
380 V, 50 Hz electrical supply
400 V, 50 Hz electrical supply
415 V 50 Hz electrical supply
460 V, 60 Hz electrical supply
45.8 A
20.8 A
19.8 A
19.2 A
22.9 A
71.0 A
34.5 A
32.9 A
31.7 A
33.8 A
Motor no-load current
230 V, 60 Hz electrical supply
380 V, 50 Hz electrical supply
400 V, 50 Hz electrical supply
415 V 50 Hz electrical supply
460 V, 60 Hz electrical supply
13.8 A
6.3 A
7.0 A
7.1 A
6.9 A
17.0 A
10.0 A
10.8 A
10.2 A
8.3 A
Table 4 - Electrical data
Cooling system type Direct water-cooling
Cooling-water supply
Supply temperature range
Maximum supply pressure
Maximum required pressure differential
across supply and return
5 to 35
o
C, 41 to 95
o
F
10 bar, 1 x 10
6
Pa, 7500 torr
2 bar, 2 x 10
5
Pa, 1500 torr
Warning thermal snap-switch
Opening temperature
Closing temperature
68
o
C, 154
o
F
62
o
C, 144
o
F
Shut-down thermal snap-switch
Opening temperature
Closing temperature
75
o
C, 167
o
F
64
o
C, 147
o
F
GV250 GV400
Typical heat removed from pump by cooling-water
50 Hz electrical supply
60 Hz electrical supply
5 kW
17150 btu
5 kW
17100 btu
Maximum water consumption with pump
operating temperature of 40
o
C/104
o
F *
50 Hz electrical supply
60 Hz electrical supply
240 l h
-1
63.4 US gal h
-1
240 l h
-1
63.4 US gal h
-1
* Pump at ultimate vacuum with a cooling-water supply temperature of 20
o
C (68
o
F) and an
ambient temperature of 20
o
C (68
o
F).
Table 5 - Cooling system data