291 Staco Energy Products Company, 291 Datasheet - Page 3

• Manufacturer Part Number: 291
• Description: Transformers TRANS VAR 0-120V 3A
• Manufacturer: Staco Energy Products Company
• Type: Variable Transformersr

Specifications of 291

• Dimensions: 2.31 in L x 2.93 in W x 3.28 in H
• Product: Variable Transformers
• Height: 3.28 in
• Length: 2.31 in
• Width: 2.93 in
• Input Voltage: 120V
• Output Current: 3A
• Knob Rotation: CW / CCW
• Transformer Mounting: Panel
• Secondary Current Nom: 3A
• No. Of Phases: Single
• Primary Voltages: 120V
• Mounting Type: Panel
• Power Rating: 0.36kVA
• Constant Current Load: 3A
• Rohs Compliant: Yes
• Current Rating: 3A
• Leaded Process Compatible: No
• Output Voltage: 120V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

100/200 Series
•
++ Line to line voltage
π
PART NO.
291-2
291-3
291
Jumper provided in the standard common position and should be moved or removed as required.
If ganged units are used in a system that ordinarily has a common neutral or ground between source and load, the neutral or ground must be connected to the com-
mon terminals of the variable transformer assembly. If the system has no neutral, the load must be balanced or the transformers will be damaged.
WIRING
Delta π
Single
Phase
Single
Phase
Series
Phase
Phase
Wye π
Three
Three
Open
201-3
221-B
VOLTS
120++
240++
120
240
INPUT
HERTZ
50/60
50/60
50/60
Single Unit
60
60
60
60
Two and Three Gang Units
VOLTS
0-120
0-132
0-240
0-264
0-120
0-132
0-240
AMPS
MAX
3.0
3.0
3.0
3.0
3.0
3.0
3.0
CONSTANT
CURRENT
LOAD
OUTPUT
MAX
0.36
0.40
0.72
0.79
0.62
0.69
1.25
KVA
AMPS
MAX
3.5
3.5
3.5
3.5
—
—
—
120V
IMPEDANCE
CONSTANT
LOAD
MAX
0.42
0.84
0.73
1.45
KVA
—
—
—
INCREASE
ROTATION
VOLTAGE
SHAFT
CCW
CCW
CCW
CCW
View from
Base End
FOR
CW
CW
CW
CW
CW
CW
CW
2-1-2
1-2-1
4-1-4
2-2-2
1-1-1
TERMINAL CONNECTIONS
Input
1-2
1-2
1-4
2-2
1-1
4-4
As Viewed from Base End
(For increasing Voltage)
Jumper• Output
1-1-1
2-2-2
1-1
2-2
1-1
1-1
2-2
1-1
—
—
—
240V
3-1-3
3-2-3
3-1-3
3-3-3
3-3-3
1-3
2-3
1-3
3-3
3-3
3-3
221-B-2, 252-2
221-B-3, 252-3
221-B, 252
171-2, 201-2
171-3, 201-3
171, 201
TYPE
TYPE
291
291-2
291-3
(Pg 8 & 9)
SCHE-
MATIC
1 & 4
1 & 5
1 & 6
1
1.88” [47.6]
2.12” [54.0]
2.31” [58.7]
4.66” [118.3]
7.38” [187.2]
5.16” [131.0]
8.12” [206.4]
5.59” [142.1]
8.81” [223.8]
A
B
2 1/2
5 1/2
5 1/2
8 1/4
LBS.
NET
WT.