Rockwell Automation Liqui-Flo AC Power Modules - Manual (Page 39)

Planning the Installation 3-9
3.2.4 Meeting Encoder Specifications (FVC Regulation Only)
LiquiFlo drives set up for FVC regulation require an encoder for closed-loop operation.
Refer to table A.6 for specifications. Drives set up for V/Hz or SVC regulation do not
require an encoder for feedback because they operate in the open loop mode.
3.2.4.1 Encoder Wiring Guidelines
Encoder connections are considered signal level wiring and, therefore, must be run
separate from control and power wiring. Reliance Electric recommends 18 AWG
unshielded twisted pair wires with 2-3 twists per inch for applications to a maximum
distance of 303 meters (1000 feet). The recommended Reliance Electric part number
is 417900-207CG, 18 AWG, 6 conductor (3 twisted pairs).
3.2.5 Verifying Power Module Output Current Rating Is Greater Than
Motor Full Load Amps
Verify that the LiquiFlo output current rating is equal to or greater than the motor’s full
load current (amps). Table 2.1 lists the output current values.
Table 3.7 – AC Input Line Fuse and Circuit Breaker Selection Values
Model Number
Input Voltage
(+/-10%) Fuse Rating
Motor Circuit Protector
or Circuit Breaker
41L4060
41LR4060
380-480 VAC
600 A
1
1 Recommended fuse type: UL Class J, 600 V, time-delay, or equivalent.
600 A
50LW4060
50LR4060
380-480 VAC
750 A
2
2 Recommended fuse type: UL Class L, 600 V, time-delay, or equivalent.
800 A
64LW4060
64LR4060
380-480 VAC
1000 A
2 1000 A
120L4060 380-480 VAC
1600 A
2 1500 A