070.610-IOM (JUL 21)
Page 15
RWF II Rotary Screw Compressor Units
Installation
Figure 17: Starter wiring diagram
USED WITH ACROSS-THE-LINE ONLY
NOTE: WHEN COMPRESSOR MOTOR VOLTAGE IS
DIFFERENT FROM OIL PUMP MOTOR VOLTAGE,
SUPPLY CIRCUIT BREAKER DISCONNECT FEED
IN LIEU OF FUSES.
OPTIONAL CIRCUIT BREAKER
DISCONNECT
NOTE: CUSTOMER GROUND REQUIRED
SEE WIRING DIAGRAM IN
090.040-M PUBLICATION.
*Additional information is available in the "Installation of Electronic Equip-
ment" section of this publication.
6.
One each normally open
compressor motor and oil
pump motor starter auxiliary contact should be supplied.
In addition to the compressor and oil pump motor starter
coils, the CT and CPT secondaries should be wired as
shown on the starter package wiring diagram. The load
on the control panel for the compressor motor starter coil
should not exceed a 2 amp load. For larger starters, an
interposing relay must be used to switch the compres sor
motor
starter coil(s).
NOTICE
Do not install a compressor HAND/OFF/AUTO switch
in the starter package as this would bypass the com-
pressor safety devices.
7.
The compressor motor
Current Transformer (CT) is
installed on any one phase of the compressor leads.
NOTICE
The CT must see all the current of any one phase,
therefore in wye-delta applications both leads of any
one phase must pass through the CT.
Figure 18: Point-to-point wiring diagram
NOTE: REFERENCE 090.040-M QUANTUM HD
MAINTENANCE MANUAL.
CONSULT STARTER AND MOTOR WIRING DIAGRAMS
FOR EXACT WIRING CONFIGURATION
FRICK SUPPLIED COMBINATION
STARTER PACKAGE
RWF II • QUANTUM HD
HI-LEVEL CUTOUT
AND/OR OTHER
FIELD SAFETY
CUTOUTS
AS REQUIRED.
CHECK MOTOR STARTER
MANUFACTURER’S INSTRUCTIONS
AND 090.040-M QUANTUM HD
PUBLICATION
FRICK QUANTUM HD
ENCLOSURE
NOTES:
1. Refer to motor nameplate for correct motor connection.
2. Separate conduit runs for control voltage wiring and motor
connection wiring.
3. Conduit grounds are not acceptable.
4. All wiring must be per latest edition of the NEC and local codes.
Current transformer (CT) ratios
The
CT ratio for various motor sizes (with a 5 amp
second ary) is given in the following table:
Table 7: CT ratios by motor HP
HP
Voltage
200
230
380
460
575
2300 4160
20
100:5
100:5
50:5
50:5
50:5
-
-
25
100:5
100:5
50:5
50:5
50:5
-
-
30
200:5
100:5
100:5
50:5
50:5
-
-
40
200:5
200:5
100:5
100:5
50:5
-
-
50
200:5
200:5
100:5
100:5
100:5
-
-
60
300:5
200:5
200:5
100:5
100:5
-
-
75
300:5
300:5
200:5
200:5
100:5
-
-
100
400:5
300:5
200:5
200:5
200:5
-
-
125
500:5
400:5
300:5
200:5
200:5
-
-
150
600:5
500:5
300:5
300:5
200:5
-
-
200
800:5
600:5
400:5
300:5
300:5
100:5
50:5
250
800:5
800:5
500:5
400:5
300:5
100:5
50:5
300
1000:5 1000:5 600:5
500:5
400:5
100:5
50:5
350
-
1000:5 800:5
500:5
500:5
100:5
100:5
400
-
-
800:5
600:5
500:5
200:5
100:5
450
-
-
1000:5 800:5
600:5
200:5
100:5
500
-
-
1000:5 800:5
600:5
200:5
100:5
600
-
-
1200:5 1000:5 800:5
200:5
100:5
700
-
-
-
1200:5 1000:5 200:5
200:5
800
-
-
-
-
1000:5 300:5
200:5
900
-
-
-
-
1200:5 300:5
200:5
1000
-
-
-
-
-
300:5
200:5
1250
-
-
-
-
-
400:5
200:5
1500
-
-
-
-
-
500:5
300:5
