DISCONNECT UNIT

DISCONNECT UNIT

Full NEC conformity in a single enclosure

The new Disconnect Unit combines all safety measures into a single, compact enclosure. It is suited perfectly for North American Sunny Central inverters in 600 V to 1000 V systems. All load break switches are located on a single switchboard, working under full load conditions and ampacity reserves required by the NEC 2011. The switching handles are installed directly on the front to identify the switching status easily. This guarantees a secure and fast separation of all energy from the inverter in case of emergency or maintenance.

Compliant

  • Full compliance to safety standards of NEC 2011


Flexible

  • Adaptable to all US inverters
  • Extendable up to six switch-disconnectors
  • Available with or without AC switch


Compact

  • All load break switches in one enclosure
  • Available as integrated part of a complete MV block


Safe

  • Easy access and fast handling
  • Reliable separation even under full load
  Disconnect Unit 600 V Disconnect Unit 1000 V
     
DC input data    
DC voltage range 0 - 600 V 0 - 1000 V
Max. nominal DC current 1600 A 1600 A
Number of DC inputs 4 ... 10 6 ... 10
Max. current / input (without reduction factors) 450 A 450 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, SC500-US: switch-disconnector
SC500HE-US,
SC500HE-CA: switch-disconnector, SC500-US: switch-disconnector		 Circuit breaker
AC voltage range 128 - 528 V 128 - 528 V
AC switch current / Max. short-circuit current 400 A / 200 kA, 800 A / 100 kA,
1600 A / 42, 65, 85 kA		 1600 A / 42, 65, 85 kA
Number of AC switching handles 1 1
     
General Data    
Dimensions (W/H/D) 2078 )1 / 1500 /970 mm (80/59/39 inch) 2078 )1) / 1500 /970 mm (80/59/39 inch)
Weight 522 kg2 / 1151 lb 522 kg)2) / 1151 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
Max. permissible value for relative humidity (non-condensing) 15 % … 95 % 15 % … 95 %
Max. 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    
Chemical aggressive environment yes yes
Wire input side / bottom yes / yes yes / yes
Switching handles on front yes yes
Connection via lug / screw terminal opt. / opt. opt. / opt.
Certificates and approvals (more available on request) UL 1741 UL 17413
Compliance with NEC 2011 NEC 2011
     
Type designation DU-SC-US DU-SC-US
     
12278 mm / 90 inch for SC500HE-US, SC500 HE-CA    
2664 kg for SC500HE-US, SC500HE-CA    
3Listed acessories for the Sunny Central CP-US inverter    
     
     
     

Downloads

Language:
Data sheet


721 KB
DISCONNECT UNIT - Full NEC conformity in a single enclosure
Type: Data sheet
Language: English (US)
Document number: SCDISCONNECT-DUS122620
Version number: 2.0
Installation Guide


6.159 KB
Disconnect Unit for Sunny Central 250U/500U/500HE-US/CA and Sunny Central CP - Installation Guide
Type: Installation Guide
Language: English (US)
Document number: DISU_SCUS-IA-IUS111711
Version number: 1.1


2.561 KB
Disconnect Unit for SUNNY CENTRAL 250U/500U/500HE‑US and SUNNY CENTRAL CP - Unpacking
Type: Installation Guide
Language: English (US)
Document number: DISU_SCUS-AP-eng-IUS110911
Version number: 1.1
Technical information


624 KB
Installation requirements for SUNNY CENTRAL 500HE-US/SUNNY CENTRAL 500HE‑CA
Type: Technical information
Language: English (US)
Document number: SC500HE-US-Auf-TI-UUS110613
Version number: 1.3
SMA America Sales

SMA America, LLC
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Rocklin, CA 95765

Phone +1 916 625-0870
Fax +1 916 625-0871
Sales@SMA-America.com