Description
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SNI1 (single-phase) and SNI3 (three-phase) voltage stabilizers of IEK® brand are intended for maintaining stable single/three-phase supply voltage of residential and industrial loads of 220V/3x220V, 50Hz at power fluctuations within wide range of value and period of time. They are applied for stabilizing voltage when working with highly-sensitive equipment in industrial sites, medical institutions, telecommunication companies, low-rise building as well as housing and public utility sector. SNI voltage regulators provide for extending the service life of alarm systems, computer equipment etc. They correspond to standards EN 55014-1, EN 55014-2, EN 60335-1, EN 61000-3-2. These devices were awarded gold medal of the International Exhibition “Elektro-2009” in nomination “Best Electrical Equipment” for their high quality, reliability and exploitation ratings as well as efficient engineering solutions. |
Range
| Name | Power, kVA | Max. input current, A | Fuse/modular circuit breaker, type | Overall dimensions, mm (WxDxH) | Weight, kg | Multiple package amount, pcs | Product ID | |
| SNI1 single-phase voltage stabilizers | ||||||||
 | SNI1 0,5 kVA | 0,5 | 2,25 | Fuse, In 5A | 19,3õ16,5õ13 | 4,5 | 4 | |
| SNI1 1 kVA | 1 | 4,5 | Fuse, In 7A | 22,5õ26õ20 | 6,5 | 4 | IVS10-1-01000 | |
| SNI1 1,5 kVA | 1,5 | 6,75 | Fuse, In 8A | 22,5õ20õ26 | 7,5 | 4 | IVS10-1-01500 | |
| SNI1 2 kVA | 2 | 9 | Modular circuit breaker, C10 2P | 22,5õ29õ21,5 | 10 | 1 | IVS10-1-02000 | |
| SNI1 3 kVA | 3 | 13,5 | Modular circuit breaker, C16 2P | 22,5õ31õ25 | 12,5 | 1 | IVS10-1-03000 | |
| SNI1 5 kVA | 5 | 22,5 | Modular circuit breaker, C20 2P | 22õ31,7õ28,3 | 18 | 1 | IVS10-1-05000 | |
| SNI1 7 kVA | 7 | 32 | Modular circuit breaker, C32 2P | 27,3õ31,1 õ44 | 26 | 1 | IVS10-1-07000 | |
| SNI1 10 kVA | 10 | 45 | Modular circuit breaker, D50 2P | 27,3õ31,1 õ44 | 27 | 1 | IVS10-1-10000 | |
| SNI1 15 kVA | 15 | 67 | Modular circuit breaker, D63 2P | 33õ38,5õ65 | 60 | 1 | IVS10-1-15000 | |
| SNI3 three-phase voltage stabilizers | ||||||||
 | SNI3 3 kVA | 3õ 1 | 3õ4,5 | Modular circuit breaker, C8 3P | 31,5õ45,5õ17,5 | 18 | 1 | IVS10-3-03000 |
| SNI3 6 kVA | 3õ2 | 3õ 9 | Modular circuit breaker, C10 3P | 27,5õ37,3õ67 | 33,5 | 1 | IVS10-3-06000 | |
| SNI3 7,5 kVA | 3õ2,5 | 3õ 10 | Modular circuit breaker, C10 3P | 32õ35,5õ76,8 | 43,5 | 1 | IVS10-3-07500 | |
| SNI3 15 kVA | 3õ5 | 3õ22,5 | Modular circuit breaker, C20 3P | 43,8õ39õ79,3 | 78 | 1 | IVS10-3-15000 | |
| SNI3 20 kVA | 3õ6,6 | 3õ 32 | Modular circuit breaker, C32 3P | 51 õ 44õ 85 | 102 | 1 | IVS10-3-20000 | |
| SNI3 30 kVA | 3õ10 | 3õ45 | Modular circuit breaker, D50 3P | 51õ44õ97,5 | 111 | 1 | IVS10-3-30000 | |
Advantages
- High precision in maintaining the output voltage within the input voltage operating range (220V±3%).
- Wide input voltage range. SNI1: 135÷275V; SNI3: 135÷275V – phase; 235÷475V – linear.
- High efficiency ≥ 90%.
- Six protection degrees: from overload short circuit, overheating, dangerous overvoltage, dangerous undervoltage, surge overvoltages.
- Stabilizer does not disturb the sinusoidal waveform of output voltage.
- Modern circuit modeling.
- High quality protection and commutation IEK® units: VA47-29, VA47-100 series breakers and KMI AC contactors.
- Convenient mounting, maintenance and transportation at the expense of built-in ergonomic handles (for small sized regulators) and wheels (for larger units).
- Warranty maintenance period – 3 years from the date of sale.
- Expanded network of service centers throughout the country.
Design Features
 | Convenient indication system displaying operating modes, output and input phase voltage levels, phase current levels. |  |
Using high quality protection and commutation IEK® units: VA47-29, VA47-100 series breakers and KMI contactors. |
 | Easy mounting and servicing. |  |
Two-polar IEK® circuit breakers installed in single-phase SNI1 voltage regulators protect phase and neutral conductors providing for boosting electric safety and reliability. |
 | Thermal protection ensured by a self-returning thermobimetallic element. |  |
SNI3 voltage stabilizers are provided with a phase retardation protection function turning the device off at the said emergency. The abovementioned protection is especially necessary for electric motor supply (refrigerators, air conditioners etc.) breaking down in case of phase retardation. |
 | Enhanced brush rack construction for excluding contact unit overheating. |  |
Standard set is completed with spare parts – fuses and current collector autotransformer brushes. |
 | Short and long-term delay option for protecting equipment from voltage surges (refrigerators, air conditioners etc.). |
Technical Features
| Feature | SNI1 | SNI3 | |
| Rated output power Pn at input voltage of 200V, kVA | 0,5; 1; 1,5; 2; 3; 5; 7; 10; 15 | 3; 6; 7,5; 15; 20; 30 | |
| Operating input voltage range Uin, V | 160÷250 | - phase: 160÷250 - line: 280÷430 | |
| Max. input voltage range, V | 135÷275 | - phase: 135÷275 - line: 235÷475 |
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| Output voltage Uout, V | 220 | - phase: 220 - line: 380 | |
| Output voltage maintenance accuracy in operating input voltage range, % | ± 3 | ± 3 | |
| Tripping voltage from increased output voltage Umax, V | 246 | 246 (for each phase voltage) | |
| Tripping voltage from decreased output voltage, Umin, V | 184 | 184 (for each phase voltage) | |
| Thermal protection at increase of transformer temperature, ºC | 105 | 105 | |
| Output voltage delay | standard | 5 s | 5 s |
| long | 5 min | n/a | |
| Efficiency, % | > 90 | ||
| Response time, s | < 1 (Uin ±10%) | ||
| Ambient temperature range, °Ñ | —5 ÷ + 40 | ||
Overall Dimensions
| Type | L, mm | H, mm | B, mm |
| SNI1-0,5 kVA | 193 | 130 | 165 |
| Type | L, mm | H, mm | B, mm |
| SNI1-1 kVA | 225 | 150 | 200 |
| SNI1-1,5 kVA | 225 | 150 | 200 |
| Type | L, mm | H, mm | B, mm |
| SNI1-2 kVA | 225 | 215 | 280 |
| SNI1-3 kVA | 225 | 250 | 295 |
| SNI1-5 kVA | 220 | 283 | 235 |
| Type | L, mm | H, mm | B, mm |
| SNI1-7 kVA | 273 | 380 | 232 |
| SNI1-10 kVA | 273 | 380 | 232 |
| Type | L, mm | H, mm | B, mm |
| SNI1-15 kVA | 330 | 650 | 385 |
| Type | L, mm | H, mm | B, mm |
| SNI3-3 kVA | 315 | 175 | 455 |
| Type | L, mm | H, mm | B, mm |
| SNI3-6 kVA | 275 | 670 | 373 |
| SNI3-7,5 kVA | 320 | 768 | 355 |
| Type | L, mm | H, mm | B, mm |
| SNI3-15 kVA | 438 | 793 | 390 |
| SNI3-20 kVA | 510 | 850 | 440 |
| SNI3-30 kVA | 510 | 975 | 440 |
Configuration
SNI1 |
SNI3 |
- stabilizer – 1 pcs. |
- stabilizer – 1 pcs. |
- operation manual. Passport – 1 pcs. |
- operation manual. Passport – 1 pcs. |
- warranty card – 1 pcs. |
- warranty card – 1 pcs. |
- spare fuses (for models 0,5; 1; 1,5 kVA) – 2 pcs. |
- spare autotransformer brushes – 1 pcs. |
- spare autotransformer brush – 1 pcs. |
- packaging – 1 pcs. |
- packaging – 1 pcs. |
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