STC Series three-phase a.c. synchronous alternators are mainly designed to serve as power generating unit for lighting purpose in villages , towns, and house-hold electric appliances or standby power.The construction of the generators are salient-pole rotating field , self excitation with 3 phase harmonic . The alternator is made of high quality magnetic and electrical materials, and easy to maintenance. The characteristic of alternators see as the followings:
1. The alternators are designed as per standard JB/T3320.2-2000. And in conformity to IEC34-1.
2. Insulation  is class B or F, drip-proof type is IP21,
3. Tight in construction for casting frame; If our customers ask for steel constuction,we can meet .
4. The alternators are three-phases with output four terminals, connectiong for the star connection, 400V rated L-L voltage,  230V rated L-N voltage, 50Hz, 0.8P.F.。If our customers ask for 60Hz or diferenent voltage, we can meet .
5. Generally the alternators can be single-bearing or double-bearing constuction; They can be coupled with engines by leather belt, and can rotate in two different direction.
6. The steady voltage regulation of alternators are good in 3% speed variation, load from no-load to full-load and power factor from 0.8 to 1.0。
7. The voltage regulation of alternators are excellent, and the capability for directly-starting motor also is fine。

The operation requirements for environment :
1. Altitude: not exceed 1000m.
2. Cooling air temperature: 258~313K (-15oC~40oC).
3. Relative air humidity: not exceed 90%.

    

Model	Rated Power (KW/KVA)	Rated Volt. (V)	Rated Curr. (A)	Rated P.F. (CosΦ)	Rated Speed (r/min)	Rated Freq (Hz)	Notes
STC-3	3/3.75	400	5.4	0.8	1500	50	alternator at 1800rpm/60Hz also available
STC-5	5/6.25	400	9	0.8	1500	50
STC-7.5	7.5/9.375	400	13.5	0.8	1500	50
STC-10	10/12.5	400	18.1	0.8	1500	50
STC-12	12/15	400	21.7	0.8	1500	50
STC-15	15/18.75	400	27.1	0.8	1500	50
STC-20	20/25	400	36.1	0.8	1500	50
STC-24	24/30	400	43.4	0.8	1500	50
STC-30	30/37.5	400	54.1	0.8	1500	50
STC-40	40/50	400	72.2	0.8	1500	50
STC-50	50/62.5	400	90.2	0.8	1500	50