Electrical Accessories Selection; Main Accessories And Accessories; Suction Filter - RFC SL Series Technical Manual

IR=I1+I7
IS=I2+I8
IT=I3+I9
R-S-T three-phase unbalanced current:
IW=(IR+Is+IT)/3
SB%=Max((IR, Is, IT)-IM)/IM ×100%
SB%<5%
1-2-3-7-8-9 Unbalanced current among six terminals:
IM=(I1+ I2+ I3+ I7+ I8+ I9)/6
SB%=Max((I1, I2, I3, I7, I8, I9)-IM)/IM ×100%
SB%<12%

4. 4 Electrical accessories selection

he size of cables, fuses and contactors should be selected according to the maximum working
current (FLA) of the motor under normal operating conditions.
When using a star-delta winding motor, the size of the delta and main contactors must be
at least 75% of the maximum operating current (FLA), and the size of the star contactor must
be at least 40% of the maximum operating current (FLA).

5. Main accessories and accessories

5.1 Suction filter

The compressor is equipped with a suction filter, which can be inspected and cleaned
after disassembling the suction shut-off valve (or suction side end cover) (Figure 5-A)
one-way valve
Figure 5-A Suction Filter and Check Valve Location