400 Volt Three Phase Autotransformers

H. 400 Volts Primary, Three Phase Autotransformers

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TEMCo Single Phase Autotransformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty.

• UL Listed, CSA Approved
• Copper windings
• 50/60 Hz rated
• NEMA 3R Enclosure (for indoor or outdoor use)

Looking for a different specification? Click here to see all the primary voltage configurations, or see our full selection of autotransformers here.

Product Selection

Copper Wound Autotransformers, 400V Primary

Select Secondary Voltage Below
kVA	600V	575V	550V	480V	460V	440V	416V	400V
15	T55730	T55740	T55750	T55760	T55770	T55780	T55790	T55800
30	T55731	T55741	T55751	T55761	T55771	T55781	T55791	T55801
45	T55732	T55742	T55752	T55762	T55772	T55782	T55792	T55802
75	T55733	T55743	T55753	T55763	T55773	T55783	T55793	T55803
112.5	T55734	T55744	T55754	T55764	T55774	T55784	T55794	T55804
225	T55735	T55745	T55755	T55765	T55775	T55785	T55795	T55805
300	T55736	T55746	T55756	T55766	T55776	T55786	T55796	T55806
450	T55737	T55747	T55757	T55767	T55777	T55787	T55797	T55807
500	T55738	T55748	T55758	T55768	T55778	T55788	T55798	T55808
750	T55739	T55749	T55759	T55769	T55779	T55789	T55799	T55809
kVA	380V	240V	230V	220V	216V	208V	200V
15	T55810	T55820	T55830	T55840	T55850	T55860	T55870
30	T55811	T55821	T55831	T55841	T55851	T55861	T55871
45	T55812	T55822	T55832	T55842	T55852	T55862	T55872
75	T55813	T55823	T55833	T55843	T55853	T55863	T55873
112.5	T55814	T55824	T55834	T55844	T55854	T55864	T55874
225	T55815	T55825	T55835	T55845	T55855	T55865	T55875
300	T55816	T55826	T55836	T55846	T55856	T55866	T55876
450	T55817	T55827	T55837	T55847	T55857	T55867	T55877
500	T55818	T55828	T55838	T55848	T55858	T55868	T55878
750	T55819	T55829	T55839	T55849	T55859	T55869	T55879

Output Amps

kVA	Output Amps at:
kVA	600V	575V	550V	480V	460V	440V	416V	400V	380V	240V	230V	220V	216V	208V	200V
15	14.4	15.1	15.8	18	18.8	19.7	20.8	21.7	22.8	36.1	37.7	39.4	40.1	41.6	43.3
30	28.9	30.1	31.5	36.1	37.7	39.4	41.6	43.3	45.6	72.2	75.3	78.7	80.2	83.3	86.6
45	43.3	45.2	47.2	54.1	56.5	59.1	62.5	64	68.4	108.3	112	118.1	120.3	124.9	129.9
75	72.2	75.3	78.7	90.2	94.1	98.4	104.1	108.3	113	180.4	188.3	196.8	200.5	208.2	216.5
112.5	108.3	112	118.1	135.3	141.2	147.6	156.1	162.4	170.9	270.6	282.4	295.2	300.7	312.3	324.8
225	216.5	225.9	236.2	270.6	282.4	295.2	312.3	324.8	341.9	541.2	564.8	590.5	601.4	624.6	649.5
300	288.7	301.2	314.9	360.9	376.5	393.7	416.4	433	455.8	721.7	753.1	787.3	801.9	832.7	866.1
450	433	451.9	472.4	541.3	564.8	590.5	624.6	649.5	683.7	1082	1129	1180	1202	1249	1299
500	481.1	502.1	524.9	601.4	627.6	656.1	693	721.7	759.7	1202	1255	1312	1336	1387	1443
750	721.7	753.1	787.3	902.1	941.4	984.2	1040.9	1082.6	1139	1804	1882	1968	2004	2081	2165