STAMFORD S0/S1 — low-voltage synchronous generator 7.5–62.5 kVA
Country: United Kingdom · Model: S0/S1
The brushless synchronous generators S0 and S1 deliver 7.5–30 kVA and 35–62.5 kVA at 400 V and 50 Hz, and 9–36 and 42–75 kVA at 60 Hz respectively. They are the smallest frame sizes of the S-Range for low-power diesel and gas sets. The output is three-phase, 380–600 V, with single-phase reconnection, and the speed is 1500/1800 rpm.
- Output 50 Hz
- 7.5–30 kVA (S0), 35–62.5 kVA (S1)
- Output 60 Hz
- 9–36 kVA (S0), 42–75 kVA (S1)
- Voltage
- 380–600 V (3-phase), single-phase reconnection
- Number of poles
- 4
Technical specifications
| Output 50 Hz | 7.5–30 kVA (S0), 35–62.5 kVA (S1) |
|---|---|
| Output 60 Hz | 9–36 kVA (S0), 42–75 kVA (S1) |
| Voltage | 380–600 V (3-phase), single-phase reconnection |
| Number of poles | 4 |
| Winding | wire, 2/3 pitch |
| Excitation | self-excited; option — auxiliary winding |
| AVR | VITA 01 (formerly AS540) |
| Insulation | class H |
| Protection | IP23 |
| SAE adaptors | 3, 4, 5 (S0); 3, 4, GM (S1) |
| Service life | at least 20 000 h |
| Standards | IEC, NEMA, UL |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The stator has a wire winding with a 2/3 pitch, class H insulation and IP23 protection. The standard digital AVR VITA 01 (formerly the analog AS540) holds the voltage within ±0.5 % and allows parallel operation by droop. The auxiliary excitation winding makes motor starting easier and sustains the steady-state short-circuit current; it is available for all versions except 7.5–15 kVA. Single-phase reconnection gives 230 V at 50 Hz or 240 V at 60 Hz. The shaft height is 132–160 mm for the S0L1, 160–180 mm for the S0L2 and 180–225 mm for the S1L2, with SAE adaptors 3, 4, 5 for the S0 and 3, 4, GM for the S1. The manufacturer states a reduction in set assembly time of up to 20 %, a service life of at least 20 000 hours and 9000 hours of accelerated component testing. The series replaced the discontinued P0 (up to 20/22 kVA) and P1 (up to 45/55 kVA).
How to choose
The choice depends on the output and the mains frequency. At 50 Hz, the S0 is used up to 30 kVA and the S1 from 35 to 62.5 kVA; at 60 Hz these limits are 36 and 75 kVA. For higher outputs, see the UC22 (26–103 kVA) or UC27 (75–312 kVA). Adjustable feet make it possible to replace a generator of another make without modifying the frame.
Request a price and lead time
STAMFORD S0/S1 — low-voltage synchronous generator 7.5–62.5 kVA. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What output do the S0 and S1 generators have at 50 and 60 Hz?
The S0 gives 7.5–30 kVA at 50 Hz and 9–36 kVA at 60 Hz, and the S1 gives 35–62.5 and 42–75 kVA respectively. The voltage is three-phase, 380–600 V.
Which voltage regulator is fitted in the S0/S1?
The digital VITA 01, which replaced the analog AS540. The regulation accuracy is ±0.5 %, and parallel operation is possible by droop.
What protection rating and insulation class does the S0/S1 have?
The protection rating is IP23 and the insulation is class H. The housing is steel and cast iron, and the generator has four poles.
Can the S0/S1 be installed in place of a generator of another make?
Yes, adjustable feet make it possible to avoid modifying the frame. SAE adaptors 3, 4, 5 are available for the S0 and 3, 4, GM for the S1.
What is the stated service life of the S0/S1 generators?
At least 20 000 hours. The components underwent accelerated life tests lasting 9000 hours, and every generator is tested before shipment.
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Need a price, lead time or replacement?
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