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Reviewed configuration
NHT-1/1 DC disconnect combiner
A 1500V DC configuration with 1 input and 1 output boundary. Confirm the project specification before release.
Source-backed technical data
Complete configuration parameters, not only a model summary.
The table below is transcribed from the approved catalogue technical sheet for this configuration. The final drawing, BOM and inspection scope remain subject to the agreed project specification.
Configuration summary
| Model | NHT-1/1 |
|---|---|
| Configuration type | DC disconnect combiner |
| Voltage class | 1500V DC |
| Input count | 1 |
| Output count | 1 |
| Protection / switching architecture | load-break disconnect |
Technical specifications
| Input | 1 string |
|---|---|
| Output | 1 string |
| Maximum Voltage | 1500V |
| Max DC Short Circuit Current Per Input(Isc) | 400A (Changeable) |
| Maximum Current Output | 400A |
| Material Type | Power Coated Steel |
| Degree of Protection | NEMA-3R / 4 / 4X |
| Degree of Resistance to Impacts | IK 10 |
| Dimension (WxHxD) | 17.71x23.62x7.08 Inches |
| Cable Input Entry | #6 to 350 AWG |
| Output Cable Gland | #6 to 350 AWG |
| DC Switch Disconnector | BH-400 |
| Rated Insulation Voltage(Ui) | 1500V |
| Rated Current(Ie) | 400A |
| Standard Compliance with (DC Switch) | UL98B |
| Certification (DC Switch) | UL |
| Rated conditional short-circuit current | 10 KA |
| DC Surge Arrester | BUD-1500 |
| Max Operation Voltage(Ucpv) | 1500V |
| Standard Compliance with (SPD) | EN 50539 Type 2 |
| Maximum Discharge Current | 40KA |
| Certification (SPD) | TUV, UL, CE |
| DC fuse holder | YRPV-400D |
| LED Indicator | ---- |
| Rated Working Voltage (fuse holder) | 1500V |
| Fuse Link | YRPV-400D In=400A DC 1500V |
| Certification (fuse holder) | TUV, UL, CE |
| Breaking capacity | 50kA |
| Operating Temperature | -20°C~+60°C |
| Humidity | 99% |
| Altitude | 2000M |
| Installation | Wall Mounting |
Related configurations
Compare nearby arrangements in the same family.
DC disconnect combiner
- Voltage
- 1000V DC
- Input / output
- 6 / 1
- Arrangement
- load-break disconnect
DC disconnect combiner
- Voltage
- 1000V DC
- Input / output
- 12 / 1
- Arrangement
- disconnect + SPD
DC disconnect combiner
- Voltage
- 1500V DC
- Input / output
- 12 / 1
- Arrangement
- disconnect + SPD
DC disconnect combiner
- Voltage
- 1000V DC
- Input / output
- 16 / 1
- Arrangement
- disconnect + SPD
Technical context
Use the relevant selection guide before finalizing the scope.
Why 1500 V Is the Utility PV Standard for DC Protection
The move to 1500 V is a response to project economics at the megawatt scale. A 1500 V array carries roughly the same power with two-thirds of the current of an equivalent 1000 V design, which shrinks conductor cross-sections, lowers resistive losses, and reduces the number of combiner boxes and inverters needed per hectare. As module currents and conversion efficiencies climb, the industry has pushed the standardized maximum system voltage upward to keep the levelized cost of energy falling. For equipment engineers, the change is not cosmetic: every component on the DC side must now be qualified for the higher insulation and transient environment.
Read Insight →Solar PV / Technical guide1500V DC Solar BOS Selection: Cable, Connector and Junction Box
The move from 1000V to 1500V maximum DC system voltage, enabled by NEC 690.7 amendments and IEC 60364-7-712 revisions, changed the economics of solar balance of system (BOS). A 1500V system fits roughly 1.5x more modules per string before hitting the inverter MPPT voltage ceiling, which means fewer strings per inverter.
Read Insight →