Power Supply - RFC SL Series Technical Manual

Normally, the INT 69 module is installed in the junction box of the compressor. However, in the
following cases, the module can also be installed in the main control box away from the
compressor, but the following points should be noted:
1) The connecting cables to the motor terminals should be carefully checked and
connected in the specified phase sequence:
L1 is connected to terminal 1; L2 is connected to terminal 2; L3 is connected to terminal 3;
the motor rotation direction is monitored with a phase monitor.
2) The connection between INT 69 module and PTC sensor should use shielded cable or
paired stranded wire alone to prevent magnetic field induction.
3) Add an additional 4A fast blow fuse between the protection module "L1/L2/L3" terminal
and the motor terminal 1/2/3.
4.2.3 Oil flow switch
The oil flow switch is installed in the oil circulation circuit between the oil separator and
the compressor, and is used to timely monitor whether the lubricating oil circulation is normal.

4.3 Power supply

Power Requirements:
Standard motor power supply: 380V-3-50Hz/460V-3-60Hz (other power supplies can be
customized according to customer requirements);
Allowable voltage range: within ±10% of the rated voltage for instantaneous operation;
Allowable voltage unbalance between L1-L2-L3: ±2%;
Maximum voltage drop during startup: 10% of rated voltage;
Allowable frequency range: rated frequency ±2%;
Allowable current unbalance: <5% (R-S-TH phase unbalance current)
Current unbalance calculation:
Proceed as follows:
First contactor current I1-I2-I3
Second contactor current I7-I8-I9
Each phase supply current:
Long-term operation within ±5% of rated voltage;
<12%(unbalanced current between six terminals 1-2-3-7-8-9)