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Automatic Electric Alternators

Class 9039-Type X

Class 9039 alternators are used with two separately enclosed motor starters to alternate the operation of the pump motors of a duplex pump installation. Duplex installations are made to provide a stand-by pump if one set of equipment fails, and to provide additional capacity if the load becomes too great for a single pump. Pump wear is equalized by automatically alternating the first pump to start on each successive operation. Class 8501 Type X machine tool relays are used in Class 9039 Type X alternators to provide maximum reliability and life.

AC Power Supply—110-600 Volts, 50-60 Hz AC
General Purpose Enclosure NEMA Type 1		Watertight Enclosure NEMA Type 4		Watertight, Dusttight and Corrosion- Resistant Glass- Polyester Enclosure NEMA Type 4X		Dusttight Enclosure NEMA Type 12		For Hazardous Locations Class 1, Group D NEMA Type 7		Open Type
Type	Price	Type	Price	Type	Price	Type	Price	Type	Price	Type	Price
XG1^a	$1064.	XW1^a	$2013.	XW11^a	$2013.	XA1^a	$1709.	XR1^a	$3000.	XO1^a	$1007.

^aVoltage code must be specified to order this product. Refer to standard voltage codes listed below and insert as shown in How To Order.


Volts	Contact Ratings
	NEMA Rating	Make		Break		Continuous Amperes
	NEMA Rating	A	VA	A	VA	Continuous Amperes
120 240 480 600	A600	60 30 15 12	7200 7200 7200 7200	6 3 1.5 1.2	720 720 720 720	10 10 10 10

Operation

1.	The two pilot devices (A and B) must be double pole. Pilot device A is set to close at a lower liquid level than B.

2.	The alternator operates first one pump and then the other on each successive closing of pilot device A.

3.	After pilot device A closes, if the liquid continues to rise and reaches the level at which pilot device B is set, both pumps will operate.

4.	With one pump running, if its disconnect means is opened, an overload relay trips, or the starter is de-energized for any reason, the other pump will automatically be started. If the pump satisfies the demand and is shut off, it will restart when pilot device B closes.

Approximate Dimensions

9039 XO1 (The 9039 XG1 uses the 9991 LG1. Other enclosed devices use Class 8502 size 0 & 1 enclosures. Dimensions on pages 13-21 through 13-24).

Voltage Codes
AC Voltages—Hz	Code
24–60	V01
24–50	V12
120–60/110–50	V02
208–60	V08
240–60/220–50	V03
277–60	V04
480–60/440–50	V06
600–60/550–50	V07
Other Voltages^e	V99^e

^eSpecify voltage and frequency.

Replacement Coils (Use 8501 Type X Relay coils) page 21-7


CP1		Discount Schedule

9/8/03

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