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Product description

The Type FB Insulating and Buck-Boost Transformer has four separate windings, two windings in the primary and two windings in the secondary. The unit is designed for use as an isolating transformer or as an auto-transformer. As an autotransformer the unit can be connected to Buck (decrease) or Boost (increase) a supply voltage. When connected in either the Buck or Boost mode, the unit is no longer an isolating transformer but is an autotransformer. Autotransformers are more economical and physically smaller than equivalent two-winging transformers designed to carry the same load. They will perform the same function as two-winding transformers with the exception of isolating two circuits. Since autotransformers may transmit line disturbances directly, they may be prohibited in some areas by local building codes. Before applying them, care should be taken to assure they are acceptable according to local code.

Product features

• Four-Winding Design - Allows for eight different wiring methods to provide a multitude of voltage and KVA outputs.
• Nema 3 Design - Encapsulated design lets you install it where you need it whether that be indoors or outdoors.
• Size - The compact design of a Buck-Boost Transformer compared to that of an Isolation Transformer allows for installation in smaller places. Saving you space and installation time.
• Isolation - When used for its name plated configuration, this transformer can be used to provide isolation for your circuit.
• Limitless uses - Buck-Boost transformers have no limitation on the type of load that can be operated from its output.
• Quieter - Due to its size compared to a comparably rated Isolation transformer, Buck-Boost transformers will be quieter while handling the same load.

Related products

	Acme T-1-37920 Buck Boost Transformer AT1498 »
	GE 9T51B0210 Buck Boost Transformer GT1124 »

Boost Voltage (Increase) - SINGLE PHASE
Input Volts	Output Volts	kVA	Amps	Connection Diagram
200	220	9.17	41.7	1 - view »
208	229	9.53	41.7	1 - view »
220	242	10.1	41.7	1 - view »
230	276	5.75	20.8	2 - view »
240	264	11	41.7	1 - view »
380	418	8.71	20.8	4 - view »
416	458	9.53	20.8	4 - view »
430	473	9.85	20.8	4 - view »
435	457	19	41.7	3 - view »
436	480	9.99	20.8	4 - view »
440	462	19.3	41.7	3 - view »
440	484	10.1	20.8	4 - view »
450	473	19.7	41.7	3 - view »
456	479	20	41.7	3 - view »
460	483	20.1	41.7	3 - view »
480	504	21	41.7	3 - view »

Buck Voltage (Reduce) - SINGLE PHASE
Input Volts	Output Volts	kVA	Amps	Connection Diagram
220	200	9.17	45.8	1 - view »
229	208	9.53	45.8	1 - view »
242	220	10.1	45.8	1 - view »
276	230	5.75	25	2 - view »
264	240	11	45.8	1 - view »
418	380	8.71	22.9	4 - view »
458	416	9.53	22.9	4 - view »
473	430	9.85	22.9	4 - view »
457	435	19	43.8	3 - view »
480	436	9.99	22.9	4 - view »
462	440	19.3	43.8	3 - view »
484	440	10.1	22.9	4 - view »
473	450	19.7	43.8	3 - view »
479	456	20	43.8	3 - view »
483	460	20.1	43.8	3 - view »
504	480	21	43.8	3 - view »

Boost Voltage (Increase) - THREE PHASE
Input Volts	Output Volts	kVA	Amps	QTY rqd	Connection Diagram
173	208	7.5	20.8	2	5 - view »
200	240	8.67	20.8	2	5 - view »
208	250	9.01	20.8	2	5 - view »
362	380	28.7	41.7	2	6 - view »
380	418	15.1	20.8	2	7 - view »
400	440	15.9	20.8	2	7 - view »
419	440	33.3	41.7	2	8 - view »
436	480	17.3	20.8	2	7 - view »
457	480	36.3	41.7	2	8 - view »
480	528	19.1	20.8	2	7 - view »
480	504	36.4	41.7	2	8 - view »
346Y200	416Y240	15	20.8	3	9 - view »
379Y219	456Y263	16.4	20.8	3	9 - view »
400Y231	480Y277	17.3	20.8	3	9 - view »
416Y240	499Y288	18	20.8	3	9 - view »

Buck Voltage (Reduce) - THREE PHASE
Input Volts	Output Volts	kVA	Amps	QTY rqd	Connection Diagram
208	173	7.5	25	2	5 - view »
240	200	8.67	25	2	5 - view »
250	208	9.01	25	2	5 - view »
380	362	28.7	45.8	2	6 - view »
418	380	15.1	22.9	2	7 - view »
440	400	15.9	22.9	2	7 - view »
440	419	33.3	45.8	2	8 - view »
480	436	17.3	22.9	2	7 - view »
480	457	36.3	45.8	2	8 - view »
528	480	19.1	22.9	2	7 - view »
504	480	36.4	43.8	2	8 - view »
416Y240	346Y200	15	25	3	9 - view »
456Y263	379Y219	16.4	25	3	9 - view »
480Y277	400Y231	17.3	25	3	9 - view »
499Y288	416Y240	18	25	3	9 - view »
NOTE: Y configured units must have Y supply for proper operation.

Shipping information

Shipping type	Days	Price
Ground	1 - 7	$27.91

Manufacturer information
		Learn more about Federal Pacific »