Johnson Controls Frick RWF 100, Руководство по установке

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RWF ROTARY SCREW COMPRESSOR UNITS
INSTALLATION
S70-600 IOM (OCT04)
Page 11
3.
The oil pump starter with fuses, or in the case where the
compressor motor is a different voltage from the oil pump
motor, with a circuit breaker disconnect suitable for sepa rate
power feed.
4.
A 2.0 KVA control power transformer (CPT) to supply 120
volt control power to the microprocessor control system and
separator oil heaters is included. If environ mental condi tions
require more than the usual two 500 watt oil heaters, an ap-
propriately oversized control transformer will be required. If
frequent power fluc tuations are anticipat ed or extremely noisy
power lines are encoun tered, a regulating control transformer
should be considered. Contact FRICK for assistance.
5.
For customer-supplied across-the-line starters, a shunt-
ing device must be installed across the Current Transformer
(terminals 3 & 4).
If the shunting device is not in-
stalled, the Analog I/O board on the
Quantum
™
panel may be severly
damaged at start-up (see Figure 10).
Figure 10 - STARTER WIRING DIAGRAM
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 start-
er package wiring diagram. The load on the control panel for
the compressor motor starter coil should not exceed a Nema
size 3 starter. For larger starters, an interposing relay must
be used to switch the compres sor motor starter coil(s).
NOTE: Do not install a compressor HAND/OFF/AUTO
switch in the starter package as this would bypass the
compressor safety devices.
7.
The compressor motor Current Transformer (CT) is in-
stalled on any one phase of the compressor leads.
NOTE: 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.
CURRENT TRANSFORMER (CT) RATIOS
The CT ratio for various motor sizes (with a 5 amp second-
ary) is given in the following table:
VOLTAGE
HP 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
MINI MUM BURDEN RATINGS
The following table gives the minimum CT burden ratings.
This is a function of the distance between the motor starting
package and the compressor unit.
BURDEN MAXIMUM DISTANCE FROM
RATING FRICK PANEL
USING # USING # USING #
ANSI VA 14 AWG 12 AWG 10 AWG
B-0.1 2.5 15 ft 25 ft 40 ft
B-0.2 5 35 ft 55 ft 88 ft
B-0.5 12.5 93 ft 148 ft 236 ft