TB1-81151 Acme Electric/Amveco/Actown, TB1-81151 Datasheet - Page 2

• Manufacturer Part Number: TB1-81151
• Description: TRANSFORMER 1KVA 120/240V
• Manufacturer: Acme Electric/Amveco/Actown
• Series: TBr
• Type: Standardr

Specifications of TB1-81151

• Maximum Power: 1000 VA
• Primary Winding(s): Dual
• Secondary Winding(s): Dual, No Center Tap
• Series Output Voltage @ Current: 24 VAC @ 41.67A
• Parallel Output Voltage @ Current: 12 VAC @ 83.34A
• Mounting Type: Chassis Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

56
SECTION
Selecting Industrial Control Transformers
To make the proper transformer selection,
the load must be completely analyzed . . .
which involves every electrically energized
component in the control circuit.
All electromagnetic control devices have
two current requirements; the first to
energize the coil; the second to maintain
the contact for a definite period of time.
The initial energizing of the coil, which
takes 5 to 20 milliseconds, requires many
times more current than normal. This is
referred to as volt-ampere inrush . . .
which is immediately followed by the
sealed volt-amperes — the amount of
current required to hold the contact in
the circuit.
Easy, five step selection
1. Determine the voltage and frequency of
2. Determine the total inrush VA of the
3. Refer to the regulation data chart.
4. Read to the far left side of the chart
supply circuit: Example: 460 Volts, 60 Hz.
control circuits from the manufacturer’s
data or the contactor data table. Do not
neglect the current requirements of
indicating lights and timing devices
that do not have an inrush VA but are
energized at the same time as the
other components in the circuit. Their
total VA should be added to the total
inrush VA.
If the supply circuit voltage (Step 1)
is reasonably stable and fluctuates
no more than ± 5%, refer to the
90% Secondary Voltage column. If
it fluctuates as much as ± 10%, refer
to the 95% Secondary Voltage column.
Go down the column you have selected
until you arrive at the inrush VA closest
to, but not less than, the inrush VA of
your control circuit.
and you have selected the continuous
nominal VA rating of the transformer
needed. The secondary voltage that
will be delivered under inrush conditions
will be either 85%, 90%, or 95% of the
rated secondary voltage — depending on
the column selected from the regulation
data chart. The total sealed VA of the
control circuit must not exceed the
nominal VA rating of the transformer
selected from the manufacturer’s data
or the contactor’s data table.
ACME ELECTRIC, POWER DISTRIBUTION PRODUCTS DIVISION
INDUSTRIAL CONTROL TRANSFORMERS
TABLE 1. Inrush VA
TABLE 2. Typical Magnetic Motor Starter & Contactor Data ①
60 Hz, 120 Volt, 3-Pole
5. Refer to the specification tables on the following pages to select a transformer
① Data is most current at time of printing. Contact individual manufacturer for updates.
Allen
Bradley
ASEA
Furnas
General Electric
Joslyn Clark
Siemens-Allis
(formerly ITE Gould)
Square D
Westinghouse
Cutler
Hammer
(Citation
Line)
VA Rating
Nominal
according to the required continuous nominal VA and primary/secondary voltages.
1000
1500
2000
3000
5000
100
150
250
300
350
500
750
50
75
Contactor
138500
85% Secondary Voltage
20% P.F.
500 Series
K Series
Heavy
Duty Series
A1 Series
B1 Series
11329
25519
28178
34797
1326
3447
3894
5418
6496
8377
362
579
839
•
LUMBERTON, NC
40% P.F.
18803
21600
28391
84542
2281
2618
3689
4575
5811
9005
218
151
210
165
160
102
224
354
522
842
00
—
—
53
15
85
25
24
18
76
12
33
25
87
15
13
9
Inrush VA @ 20% & 40% Power Factor
192
110
218
151
210
245
160
103
103
29
20
85
25
24
18
76
12
27
25
20
20
0
9
11.5
•
192
175
100
218
151
210
245
160
103
103
90% Secondary Voltage
100000
800-334-5214
20% P.F.
29
22
25
24
18
76
12
27
25
20
20
18013
19372
24562
1
1003
2462
2812
3870
4691
5913
7789
289
462
664
240
240
150
218
528
210
194
311
160
140
29
31
15
25
60
18
21
37
25
—
—
24
2
N.E.M.A. Size
1152
•
40% P.F.
660
580
490
310
724
365
700
625
390
13273
14850
20041
61058
www.acmepowerdist.com
1629
1890
2635
3304
4102
6191
3
45
43
35
26
83
30
35
46
50
—
—
50
179
283
413
637
1225
1000
1248
1185
1158
900
957
880
530
625
100
4
69
65
55
75
86
39
40
85
50
—
—
2040
95% Secondary Voltage
10508
10566
14328
61550
110
20% P.F.
A
1477
1731
2322
2887
3449
4248
217
345
489
679
1950
1200
1518
2580
1790
1630
2970
1700
1158
1158
116
191
295
110
212
180
100
100
5
98
65
1490
L
96
40% P.F.
11690
37574
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
VA Inrush
VA Sealed
1163
1581
2033
2393
3377
7742
8100
134
211
304
431
977