Disconnect Unit

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Disconnect Unit
Central Inverters
SUNNY CENTRAL- High Tech for solar power stations
We have developed the Sunny Centrals specially for use in large PV power stations and open-field plants. Hence they possess completely special properties. String monitoring, capacity for teamwork and the ability to feed into the medium-voltage power grid make them first choice for PV systems with homogenous structure.
Disconnect Unit
Complete NEC conformity, compact in a single switch cabinet
The new Disconnect Unit combines all safety measures into a single, compact enclosure. It is perfectly suited for all Sunny Central inverters with a plant voltage from 600 V to 1000 V currently used in North America. All switch-disconnectors are concentrated in a small space to ensure easy handling in hazardous situations, working under full load conditions and having high ampacity reserves required by the NEC 2011. The switching handles installed in the front enable the switch position to be identified at a single glance. This guarantees a secure and fast disconnection of all energy sources from the inverter in case of emergency or maintenance.
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Compliant
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Compact
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Flexible
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Reliable
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Disconnect Unit 600V |
Disconnect Unit 1000V |
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| Input (DC) | ||
| DC voltage range | 0 V – 600 V | 0 V – 1000 V |
| Max. nominal DC current | 1600 A | 1600 A |
| Number of DC inputs | 4 ... 10 | 6 ... 10 |
| Max. short-circuit current / input | 288.5 A | 288.5 A |
| Data (DC switch) | ||
| Switch type | Switch-disconnector | Switch-disconnector |
| Max. short-circuit current | 20 kA RMS | 20 kA RMS |
| Number of DC switching handles | 2 ... 5 | 3 ... 5 |
| Data (AC switch) | ||
| Switch type |
SC250-US: switch-disconnector, SC500-US, SC500HE-US, SC500HE-CA: circuit breaker |
Circuit breaker |
| Nominal AC voltage range | 128 V – 528 V | 128 V – 528 V |
| AC switching current / max. short-circuit current | 400 A / 200 kA, 800 A / 100 kA, 1600 A / 42, 65 ,85 kA | 1600 A / 42, 65 ,85 |
| Number of the AC switching handles | 1 | 1 |
| General data | ||
| Dimensions (W / H / D) |
2078 1) / 1500 / 970 mm (80 / 59 / 39 inch) |
2278 / 1500 / 970 mm (80 / 59 / 39 inch) |
| Weight | 522 kg 2) / 1151 lb | 664 kg / 1464 lb |
| Operating temperature range |
-25 °C ... +50 °C -13 °F ... +122 °F |
-25 °C ... +50 °C -13 °F ... +122 °F |
| Storage temperature range |
-40 °C ... +60 °C -40 °F ... +140 °F |
-40 °C ... +60 °C -40 °F ... +140 °F |
| Degree of protection | NEMA 3R | NEMA 3R |
| Cooling system | Passive | Passive |
| Maximum permissible value for the relative humidity (non-condensing) | 15 % ... 95 % | 15 % ... 95 % |
| Maximum operating altitude above MSL |
4000 m 13000 ft Derating above 2000 m 6500 ft |
4000 m 13000 ft Derating above 2000 m 6500 ft |
| Features | ||
| Chemically aggressive environment | yes | |
| Cable entry on side / below | yes / yes | yes / yes |
| Switch handles on the front | yes | yes |
| Connection via terminal lug / screw terminal | opt. / opt. | opt. / opt. |
| Certifi cates and approvals (more upon request) | UL 1741 | UL 1741 3) |
| Conformity | NEC 2011 | NEC 2011 |
| Type designation | Disconnect Unit 600V | Disconnect Unit 1000V |
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1) 2278 mm or 90 inch for SC500HE-US, SC500HE-CA 2) 664 kg for SC500HE-US, SC500HE-CA 3) Cabinet + AC switch: UL1741, DC switch: IEC 60947-3, UL98B pending |
Additional Information
- manufacturer: SMA Solar Technology / Germany /














