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Electrical Specifications
Control Transformer kVA Ratings
1Nominal Input Voltage (V AC)	2Continuous Input Current (A AC)	Nominal DC Bus Voltage (V DC)	3Maximum Continuous DC Bus Current (A DC)	NRU Current Code	4Rated DC Bus kW	Basic Capacity	Optional Standard Capacity for Control Bus	Optional Extra Capacity for Control Bus
230	151	310	180	A	56	1	2	5
230	290	310	350	B	109	1	2	5
230	739	310	900	C	279	1	2	5
230	1229	310	1500	D	465	1	5	10
230	1637	310	2000	E	620	1	5	10
230	2050	310	2500	F	775	2	5	10
230	2458	310	3000	G	930	2	5	10
380	150	510	180	A	92	1	2	5
380	288	510	350	B	179	1	2	5
380	737	510	900	C	459	1	2	5
380	1227	510	1500	D	765	1	5	10
380	1636	510	2000	E	1020	1	5	10
380	2047	510	2500	F	1275	2	5	10
380	2455	510	3000	G	1530	2	5	10
460	149	620	180	A	112	1	2	5
460	288	620	350	B	217	1	2	5
460	737	620	900	C	558	1	2	5
460	1227	620	1500	D	930	1	5	10
460	1635	620	2000	E	1240	1	5	10
460	2046	620	2500	F	1550	2	5	10
460	2454	620	3000	G	1860	2	5	10
575	149	775	180	A	140	1	2	5
575	288	775	350	B	271	1	2	5
575	737	775	900	C	698	1	2	5
575	1226	775	1500	D	1163	1	5	10
575	1635	775	2000	E	1550	1	5	10
575	2045	775	2500	F	1938	2	5	10
575	2453	775	3000	G	325	2	5	10
1Refer to Functional Specifications table for AC input specifications.
2AC line current shown is for NRU with basic capacity control transformer. Refer to Table E for AC input current if you have selected a control power source upgrade option.
3 Refer to Functional Specifications table for NRU overload capability.
4Rated DC bus kW is the power available on the DC thru bus. This value is independent of control transformer selection. To calculate the input kVA, use this formula:

Functional Specifications
AC Input Frequency Tolerance	45 to 65 Hz
AC Input Voltage Tolerance	± 10%
Overload Capability	150% maximum DC bus current for 60 seconds, 200% for 10 seconds following continuous operation
Overload Duty Cycle	1 minute out of 20 minutes at rated load and temperature
Minimum Continuous Load Requirement	† 33% of rated DC bus continuous current
† If the total continuous DC input current of the load is less than 33% of the rate NRU DC bus continuous current, the bus current may become discontinuous.

Input Currents of NRU with Control Source Upgrade Options
Nominal Input Voltage (V AC)	NRU Current Code	Continuous Input Current of NRU with Standard Capacity Control Source Upgrade Option 6P (A AC)	Continuous Input Current of NRU with Extra Capacity Control Source Upgrade Option 6PX (A AC)
230	A	156	169
230	B	294	308
230	C	744	757
230	D	1246	1268
230	E	1655	1676
230	F	2063	2086
230	G	2471	2493
380	A	152	160
380	B	291	299
380	C	740	748
380	D	1238	1251
380	E	1646	1659
380	F	2054	2068
380	G	2463	2476
460	A	151	158
460	B	290	297
460	C	739	746
460	D	1236	1246
460	E	1644	1655
460	F	2052	2063
460	G	2460	2471
575	A	150	156
575	B	289	294
575	C	738	744
575	D	1233	1242
575	E	1642	1650
575	F	2050	2059
575	G	2458	2467

Thru Bus Ratings per Unit
Unit DC Bus Current (A DC)	Thru Bus Rating(A DC)
180	800
350	800
900	1600
1500	1600
2000	3000
2500	3000
3000	3000
Operating Conditions
Altitude1	1000 meters (3,300 ft)
Ambient Temperature2	0º to 40º C (32º to 104º F)
Relative Humidity	5% to 95%, non-condensing
1For altitudes higher than 1000 meters, derate using Figure 1.
2For temperatures greater than 40º C, derate using Figure 2.

Operating Sound Level
DC Bus Current (A DC)	Current Code	Average Operating Sound Level (dB) 1
180, 350	A, B	78
900	C	77
1500, 2000	D, E	73
2500, 3000	F, G	76
1Sound level determined using "A"-type weighting.

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