AIM Manual

Motor Application » Three-Phase Motors (Page 32)

SubMonitor

SubMonitor Three-Phase Protection

Applications

SubMonitor is designed to protect 3-phase pumps/motors with service factor amp ratings (SFA) from 5 to 350 A (approx. 3 to 200 hp). Current, voltage, and motor temperature are monitored using all three legs and allows the user to set up the SubMonitor quickly and easily.

This product is lead free.

Protects Against

  • Under/Overload
  • Under/Overvoltage
  • Current Unbalance
  • Overheated Motor (if equipped with Subtrol Heat Sensor)
  • False Start (Chattering)
  • Phase Reversal

Power Factor Correction

In some installations, power supply limitations make it necessary or desirable to increase the power factor of a submersible motor. Table 32 lists the capacitive kVAR required to increase the power factor of large Franklin three-phase submersible motors to the approximate values shown at maximum input loading.
Capacitors must be connected on the line side of the overload relay, or overload protection will be lost.

Table 32 kVAR Required 60 Hz
MOTORKVAR REQUIRED FOR PF OF
HPKW0.90.951
53.71.22.14
7.55.51.73.16
107.51.53.37
15112.24.710
20151.7512
2518.52.16.215
30222.57.418
40304.51124
50377.11532
60458.41838
75556.31843
10075112760
12593173677
150110204290
1751309.63693
2001501646110
  • Values listed are total required (not per phase).