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Square-D Disconnects
240 VAC and 600 VDC NEMA 3R Safety Switch Disconnects
For inverters that do not include a DC disconnect, or when an additional DC disconnect is required, one
of these 600 VDC disconnects can be used. Many utilities require an AC disconnect between a grid-tie
inverter and the AC load center, close to the AC service entrance, and with a visible and lockable handle.
For inverters that do not include a DC disconnect, or when an additional DC disconnect is required, one of these 600 VDC disconnects can be used. Many utilities require an AC disconnect between a grid-tie inverter and the AC load center, close to the AC service entrance, and with a visible and lockable handle.
The Square-D 600 VDC-rated 30 A, 60 A, and 100 A three-pole safety switches are rated by Square-D to handle one 600 VDC circuit per pole for PV (although they are not UL Listed for this purpose). The 30 A switch is rated for 16 A short-circuit current (Isc at PV module STC) for non-fused versions, and 12.8 A (Isc) for fused versions. The 60 A switch is rated for 48 A (Isc) for non-fused versions and 38 A (Isc) for fused versions. The 100 A switch is rated for 80 A (Isc) for non-fused versions and 64 A (Isc) for fused versions.
All of the Square-D 600 VDC non-fused disconnects are rated for disconnecting one circuit at full rated current using two poles in series. Fused disconnects are rated for 80% of switch current rating at up to 600 VDC.
Use Class-R fuses of the proper voltage and amperage for fused disconnects. 600 V fuses will not fit into 240 VDC disconnects, and 250 VAC/125 VDC fuses will not fit into 600 V disconnects, and vice-versa.
Heavy-Duty (HD) switches are rated for “Service duty”. Use the fused versions for AC line-side connections.
| AC-Only NEMA 3R Safety Switch Disconnects |
| Use these General-Duty Square-D AC safety switches for single-phase or three-phase grid-tie inverter outputs if you are back-feeding a circuit breaker to make the connection to the service panel. They can also be used as a disconnect for the AC output of off-grid inverters. Use Class-R 250 VAC/125 VDC fuses with the fused versions of these disconnects. |
| Amps | AC/DC | Fused | Poles | Neutral kit | Ground kit | Dimensions (H" x W" x D") | Weight | Model | Item code |
|---|---|---|---|---|---|---|---|---|---|
| 30 A | AC only | No | 2 | SN20A | PK3GTA1 | 9.63 x 7.25 x 3.75 | 4.4 lbs | DU221RB | 5800025 |
| 30 A | AC only | Yes | 2 | included | PK3GTA1 | 9.63 x 7.25 x 3.75 | 4.5 lbs | D221NRB | 5800018 |
| 30 A | AC only | No | 3 | SN20A | PK3GTA1 | 9.63 x 7.25 x 3.75 | 4.7 lbs | DU321RB | 5800027 |
| 30 A | AC only | Yes | 3 | included | PK3GTA1 | 9.63 x 7.25 x 3.75 | 5.1 lbs | D321NRB | 5800062 |
| 60 A | AC only | Yes | 2 | included | GTK03 | 14.88 x 6.63 x 4.88 | 9.7 lbs | D222NRB | 5800019 |
| 60 A | AC only | No | 3 | SN20A | PK3GTA1 | 9.63 x 7.25 x 3.75 | 5 lbs | DU322RB | 5800059 |
| 60 A | AC only | Yes | 3 | included | GTK03 | 14.88 x 6.63 x 4.88 | 9.8 lbs | D322NRB | 580-0021 |
| 100 A | AC only | Yes | 2 | included | GTK0610 | 17.50 x 8.50 x 6.50 | 16 lbs | D223NRB | 580-0020 |
| 100 A | AC only | No | 3 | SN0610 | GTK0610 | 17.50 x 8.50 x 6.50 | 15 lbs | DU323RB | 580-0028 |
| 100 A | AC only | Yes | 3 | included | GTK0610 | 17.50 x 8.50 x 6.50 | 16 lbs | D323NRB | XXXXXXXXXX |
| 200 A | AC only | Yes | 2 | included | PKOGTA2 | 29.25 x 17.25 x 8.25 | 29 lbs | D224NRB | XXXXXXXXXX |
| 200 A | AC only | Yes | 3 | included | PKOGTA2 | 29.25 x 17.25 x 8.25 | 30 lbs | D324NRB | 580-0022 |
| AC / DC Square-D Disconnects |
| Amps | AC/DC | Fused | Poles | Neutral kit | Ground kit | Dimensions (H" x W" x D") | Weight | Model | Item code |
|---|---|---|---|---|---|---|---|---|---|
| 30 A | Yes | No | 3 | SN03 | GTK03 | 14.88 x 6.63 x 4.88 | 9.3 lbs | HU361RB | 053-02312 |
| 30 A | Yes | Yes | 3 | SN03 | GTK03 | 14.88 x 6.63 x 4.88 | 9.8 lbs | H361RB | 053-02313 |
| 60 A | Yes | No | 3 | SN0610 | GTK0610 | 17.50 x 9 x 6.38 | 16 lbs | HU362RB | 053-02339 |
| 60 A | Yes | Yes | 3 | SN0610 | GTK0610 | 17.50 x 9 x 6.38 | 16 lbs | H362RB | 053-02341 |
| 100 A | Yes | No | 3 | SN0610 | GTK0610 | 21.25 x 8.50 x 6.38 | 24 lbs | HU363RB | 053-02357 |
| 100 A | Yes | Yes | 3 | SN0610 | GTK0610 | 21.25 x 8.50 x 6.38 | 24 lbs | H363RB | 053-02355 |
| 200 A | Yes | No | 3* | SN20A | PKOGTA2 | 29.25 x 17.25 x 8.50 | 44 lbs | HU364RB | 053-02364 |
| 200 A | Yes | Yes | 3* | SN20A | PKOGTA2 | 29.25 x 17.25 x 8.50 | -- | H364NRB | 053-02366 |
| 400 A | Yes | Yes | 3* | Included | PKOGTA2 | 50.31 x 27.88 x 10.13 | -- | H365NR | 053-02407 |
| 800 A | Yes | Yes | 3* | Included | PKOGTA7 | 69.13 x 36.62 x 17.75 | -- | H367NR | 053-02373 |
| 1,200 A | Yes | Yes | 3* | Included | PKOGTA8 | 69.13 x 36.62 x 17.75 | -- | H368NR | 053-02409 |
*Uses 2 poles (and 2 fuses) in series for 600 VDC, no PV rating per pole.
| AC-Only NEMA 3R Safety Switch Disconnects |
| Use these General-Duty Square-D AC safety switches for single-phase or three-phase grid-tie inverter outputs if you are back-feeding a circuit breaker to make the connection to the service panel. They can also be used as a disconnect for the AC output of off-grid inverters. Use Class-R 250 VAC/125 VDC fuses with the fused versions of these disconnects. |
| Part Number | Product | Price | Add to Cart | ||
|---|---|---|---|---|---|
| 5800025 |  |
Square D, AC Disconnect, NEMA 3R, 30A, 240VAC, 2-Pole Unfused, Hub, 59123, DU221RB |  |
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| 5800018 | |
Square D, AC Disconnect, NEMA 3R, 30A, 240V, 2-Pole Fused, Neutral Bar, 49590, D221NRB | |
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| 5800027 |  |
Square D, AC Disconnect, NEMA 3R, 30A, 240VAC, 3-Pole Unfused, 59725, DU321RB | |
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| 5800062 | |
Square D, AC Disconnect, NEMA 3R, 30A, 240V, 3-Pole Fused, Neutral Bar, 50441, D321NRB | |
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| 5800019 | |
Square D, AC Disconnect, NEMA 3R, 60A, 240V, 2-Pole Fused, Neutral Bar, Hub, 49705, D222NRB | |
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| 5800059 |  |
Square D, AC Disconnect, NEMA 3R, 60A, 240VAC, 3-Pole Unfused, 59909, DU322RB | |
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| 5800026 |  |
Square D, AC Disconnect, NEMA 3R, 60A, 240VAC, 2-Pole Unfused, Hub, 59557, DU222RB | |
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MidNite and OutBack Combiners Ship in 3 - 5 Business Days After Funds Clear.
| 240 V and 600 V NEMA 3R Safety Switch Disconnects |
| For inverters that do not include a DC disconnect, or when an additional DC disconnect is required, one of these 600 VDC disconnects can be used. Many utilities require an AC disconnect between a grid-tie inverter and the AC load center, close to the AC service entrance, and with a visible and lockable handle. |
| Part Number | Product | Price | Add to Cart | ||
|---|---|---|---|---|---|
| 5800037 |  |
Square D, Disconnect, NEMA 3R, 30A, 600VAC/600VDC, 3-Pole Unfused, Hub, 63833, HU361RB | |
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| 02803061 |  |
1 - VISION, V2S-2S, DIGITAL KWH METER, FORM 2S, 240V, 200A; 1 - ITRON, DIGITAL KWH METER, CENTRON TYPE C1S, FORM 2S, 240 V, CL200, REMFG | |
MidNite and OutBack Combiners Ship in 3 - 5 Business Days After Funds Clear.
solar combiners disconnects electrical distribution parts
Solar Combiners and electrical distribution integrating. For grid tied as well as off-grid solar kits, after you have selected the equipment needed, you will need to complete the solar package with combiners, disconnect and over current protection according to the National Electric Code (NEC) requirements. Building inspectors tend to look very close at how the solar array is wired and if NEC approved electrical equipment is used. When planning your grid tied or off-grid solar system knowing where to place the electrical equipment is critical for code compliant solar installations.
The National Electrical Code requires that all solar electrical equipment be installed and used in accordance with the manufactures instructions. A common mistake for combiners, disconnects and inverters is not to allow for the proper spacing according to the equipment manufactures specifications. You should also avoid placing any electrical equipment in direct sunlight. The main reason for that is electricity flowing through circuits tend to heat up the equipment anyway. By placing the equipment in the shade whenever possible, you can avoid having to derate the power loss according to the manufactures instructions. For conduit runs you may not be able to avoid locations out of the direct sunlight. Not just in these cases, but in all cases it is better to use wires and conduit that may be overrated than underrated for the application.
Any combiner box, disconnect or other electrical equipment you install with wire terminations inside of it can be called an enclosure. It is important you know the National Electrical Manufactures Association (NEMA) rating before you buy and install the equipment. The NEMA indoor or outdoor rating will determine how the equipment may be used and will certainly affect your inspection and the performance of the grid-tied or off-grid solar system.
The most common NEMA enclosure ratings for combiners, disconnects, cabinets and inverters are:
- NEMA 1 - Indoor Applications Only; This type of enclosure does not offer any protection from the elements and should not be exposed to dust or water.
- NEMA 3R - Outdoor Installation; This type of enclosure offers protection from rain but generally must be installed on a vertical surface only.
- NEMA 4 - Outdoor Installations on Horizontal or Vertical Surfaces - NEMA 4 enclosures are very durable, weatherproof and can withstand direct spray from a hose.
When selecting the location of your combiners and or disconnect equipment, you will need to install them in such a location that when you work on the inverter you can safely disconnect both the AC and DC power sources. The National Electric Code requires the solar disconnect be installed in a readily accessible location either on the outside of the building normally near the main breaker box so the fire officials can quickly locate it. The NEC code section 690.15 states that the solar array must have a means for disconnecting and isolating the inverter from he main solar power source. Grid tied inverters with solar array voltage above 250 VDC need a disconnect rated for 600 VDC. Many utility companies require an AC disconnect between the grid tied inverter and AC breaker box close to the AC service entrance with a visible and lockable handle.