Schneider Electric 33470 ComPact NS800H 4P Micrologic 2.0

33470: ComPact NS800H 4P breaker with MicroLogic 2.0

The 33470 is a ComPact NS800H fixed-mounted circuit breaker, four poles with all four protected (4D), rated 800 A, with a MicroLogic 2.0 electronic trip unit and the datasheet performance level “H 70 kA 415 V AC”. Seven Star LLC supplies the 33470 in Oman and the GCC as an independent supplier based in Muscat.

Reading the name: NS marks the ComPact NS630b to 1600 range, 800 is the rating in amperes at 50 °C, and the letter H is the performance level. The H performance level raises the figure to 70 kA Icu at 380/415 V AC and 42 kA at 660/690 V, against 50 kA and 30 kA for the N level, which makes it the choice for boards with higher prospective fault current.

Status note: the datasheet for the 33470 marks it as discontinued on 30 Sep 2024. It is therefore mainly relevant to maintenance, spares and like-for-like replacement of an existing installation. If you are designing a new board, ask us which current reference applies to the same duty and we will check the manufacturer documents before quoting, instead of assuming that a sibling is a drop-in.

33470 technical specifications

Site conditions for the 33470 in Oman and the GCC

The datasheet lists an operating ambient of -25 to 70 °C, relative humidity of 0 to 95 %, IP40 with IK07 and pollution degree 3 conforming to IEC 60947. The operating altitude is 0 to 2000 m without derating; 2000 m to 5000 m with derating.

In Oman these breakers sit in main low-voltage switchboards at substations, desalination and water plants, industrial power houses and large buildings. Summer heat inside the switchboard, dust and coastal humidity are the usual risks, so compare the room temperature with the figures above.

Information to send with an RFQ for the 33470

Because the item is discontinued, please include:

• Part number 33470 and quantity.
• Nameplate photograph of the existing breaker, if replacing one.
• System voltage, frequency and prospective fault current.
• Trip unit settings in use and any accessories fitted.
• Delivery location and the date by which you need the breaker.

Breaking capacity and ratings of the 33470

The full Icu and Ics lists are in the table above; the figure to carry into a fault study is 70 kA Icu at 380/415 V AC, with 42 kA at 660/690 V AC.

Short-time withstand current Icw is 19.2 kA 1 s conforming to IEC 60947-2, the insulation voltage is 800 V AC 50/60 Hz conforming to IEC 60947-2 and the impulse withstand is 8 kV conforming to IEC 60947-2.

Trip unit and settings of the 33470

This version carries the MicroLogic 2.0 trip unit, which gives long-time and instantaneous protection (LI) only; there is no short-time stage and the datasheet lists zone selective interlocking as Without.

With In = 800 A the long-time pick-up can be set from about 320 A (0.4 x In) to 800 A. The instantaneous pick-up is 1.5 to 10 x Ir, so with Ir at its maximum the top setting works out to about 8000 A; at a lower Ir the instantaneous threshold falls in proportion.

The long-time delay tr is listed as 12.5 to 600 s at 1.5 x Ir; 0.5 to 24 s at 6 x Ir; 0.7 to 16.6 s at 7.2 x Ir and the thermal memory is 20 mn. These figures matter for coordination with upstream and downstream devices, so request a coordination study if the 33470 will sit between a transformer and several outgoing feeders.

Size, weight and mounting of the 33470

The 33470 is a fixed breaker for mounting on a backplate, with front connections at the top and bottom on a 70 mm pitch. The body measures 280 mm wide, 327 mm high and 147 mm deep and weighs 18 kg. Power losses are listed as 15 W, a figure to include in the heat balance of the enclosure.

As a four-pole device it is 280 mm wide against 210 mm for the three-pole frames in this group, and it weighs 18 kg against 14 kg. The neutral position is left, and the neutral protection setting can be none (3D), 0.5 x Ir (3D + N/2) or 1 x Ir (4D).

ComPact NS comparison table around the 33470

The twelve references in this group of datasheets cover the 800, 1000, 1250 and 1600 A ratings in N and H performance levels, in three and four poles. Every row below carries a discontinued flag on its datasheet.

Discontinued status and replacement planning for the 33470

Discontinued does not stop installed 33470 units from working, and the datasheet figures stay valid for them; what changes is availability. For a like-for-like swap, match the rated current of 800 A, the poles (4P), the breaking capacity (70 kA at 380/415 V), the trip unit type and the size of 280 mm x 327 mm x 147 mm with its 70 mm connection pitch. Send us a nameplate photograph and we will compare it against the datasheet.

Documents and quotation

The manufacturer datasheet for this reference is attached on this page, so you can compare the figures quoted here with the original before you commit to a design or a purchase order.

To proceed, send the part number, the quantity and a few lines about the installation and we will reply with availability and a quotation. Seven Star LLC works as an independent supplier in Muscat with no affiliation to the manufacturer.