Franklin 2007 SubMonitor Three-Phase Protection, Power Factor Correction, KVAR Required 60 Hz

Application – Three-Phase Motors

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.

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	Table 31 kVAR Required 60 Hz
necessary or desirable to increase the power factor of a
		MOTOR		KVAR REQUIRED FOR PF OF:
submersible motor. The table lists the capacitive kVAR
	HP	KW	0.90	0.95		1.00
required to increase the power factor of large Franklin
three-phase submersible motors to the approximate	5	3.7	1.2		2.1	4.0
values shown at maximum input loading.	7.5	5.5	1.7		3.1	6.0
Capacitors must be connected on the line side of the	10	7.5	1.5		3.3	7.0
	15	11	2.2		4.7	10.0
overload relay, or overload protection will be lost.
	20	15	1.7		5.0	12.0
	25	18.5	2.1		6.2	15.0
	30	22	2.5		7.4	18.0
	40	30	4.5		11.0	24.0
	50	37	7.1		15.0	32.0
	60	45	8.4		18.0	38.0
	75	55	6.3		18.0	43.0
	100	75	11.0		27.0	60.0
	125	90	17.0		36.0	77.0
	150	110	20.0		42.0	90.0
	175	130	9.6		36.0	93.0
	200	150	16.0		46.0	110.0

Values listed are total required (not per phase).

31