Schneider Electric 33482 ComPact NS1600N 1600 A 3P Breaker

33482: 1600 A ComPact NS1600N 3-pole breaker, MicroLogic 2.0

33482 is the reference for a ComPact NS1600N circuit breaker with 3 protected poles and a MicroLogic 2.0 trip unit, rated 1600 A at 50 °C. Seven Star LLC supplies it in Oman and the GCC as an independent supplier based in Muscat.

The device short name in the datasheet is Compact NS1600N. In this naming the digits give the frame current class, and the letter N is the breaking-capacity level: the datasheet’s performance level reads N 50 kA at 415 V AC. The trip unit is MicroLogic 2.0, an LI electronic unit, and the device has 3 protected poles (3D).

Please note that the datasheet carries a discontinued notice dated 30 Sep 2024. Seven Star LLC can still quote the 33482 where stock or alternatives exist, but availability should be confirmed before it is specified for a new project; for a like-for-like replacement we need the full nameplate of the breaker being replaced.

Technical specifications of the 33482

MicroLogic 2.0 protection on the 33482

The MicroLogic 2.0 is a basic electronic trip unit. The datasheet gives two protection functions only: L for long-time overload protection and I for instantaneous short-circuit protection. There is no short-time (S) stage, so selectivity with a downstream breaker depends on how the instantaneous threshold sits relative to the downstream device rather than on an adjustable delay.

The long-time pick-up Ir is adjustable in 9 settings from 0.4 to 1 x In. With In of 1600 A on this 33482, that spans 640 A to 1600 A (calculated from the datasheet range). 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 and 0.7 to 16.6 s at 7.2 x Ir. A thermal memory of 20 minutes is stated.

Instantaneous pick-up Ii is adjustable from 1.5 to 10 x Ir. Setting Ir to 1600 A therefore puts the top end of the instantaneous range at 16,000 A, calculated.

Icu and Ics of the 33482

The datasheet lists the following ratings, conforming to IEC 60947-2. Icu is the ultimate breaking capacity; Ics is the rated service breaking capacity.

For the 1600 A frame the service breaking capacity Ics is lower than Icu: 37 kA at 380/415 V against 50 kA Icu, so the Ics/Icu ratio is not 100 %.

Icw is 19.2 kA for 1 s; utilisation category B.

Rating and pole configuration of the 33482

At 415 V a three-phase load of 1600 A corresponds to roughly 1,150 kVA (calculated as √3 x 415 V x 1600 A; not a datasheet value). The datasheet gives the rated current as 1600 A at 50 °C, with the device operating in ambient temperatures up to 70 °C, so in a hot switchroom the loading of the 33482 should be checked against the manufacturer’s derating information rather than assumed to be 1600 A.

The 33482 is the three-pole version: 210 mm wide and 14 kg. It protects and switches three phase poles (3D). If the system needs a switched or protected neutral, the four-pole form of the same rating is the alternative; it is 280 mm wide and 18 kg and adds neutral settings.

The datasheet states power losses of 74 W for this device. That heat stays inside the enclosure, so when several breakers sit in one cubicle their dissipation is added to the busbar and cable losses when the cooling or ventilation is sized.

Sibling NS breakers compared

Seven Star LLC also handles other ComPact NS references. Check poles, trip unit and breaking-capacity level before substituting any of them for the 33482.

33483 is NS1600H with level H instead of N. 33484 is NS1600N with 4 poles instead of 3.

Accessories such as release coils, rotary handles and motor mechanisms are separate part numbers; send them with the breaker reference for a complete quotation.

Fitting and servicing the 33482

On site, verify the fixing of the 33482, the cable or busbar connection torque and clearances, and operate the handle through open and close before applying load. Set Ir, tr and the short-circuit pick-ups to the protection-study values and note them.

The trip unit has 4 red LEDs for fault indication and 1 yellow LED for overload, a first diagnosis after a trip. Electrical durability is 1000 cycles at 690 V In; 2000 at 690 V In/2; 2000 at 440 V In; 5000 at 440 V In/2; use it when planning inspection intervals.

With IP40 and IK07 protection and pollution degree 3, the 33482 belongs inside an enclosed switchboard; the stated humidity limit is 0 to 95 %.

Applications in oil, gas, power and water plants

A 1600 A rating is used on the larger incomers and bus-section positions: the LV side of a 1000 kVA class transformer, central chiller plants, compressor houses and the main board of an industrial building. Whether in an oil and gas facility, a power station auxiliary system or a desalination plant, the question is the same: does the fault level at the board stay below the breaker’s Icu at the system voltage. The MicroLogic 2.0 gives plain overload and short-circuit protection, which fits feeders where no time-selectivity with a downstream device is needed.

Information to send with an RFQ for the 33482

To quote quickly and correctly, please send:

• Reference 33482 and quantity; also state whether a replacement for an existing device is intended, since the datasheet shows it as discontinued.
• Poles needed (3) and, for a four-pole device, the neutral protection setting expected.
• System voltage, available fault level at the board and the intended Icu level (N).
• Trip unit required (MicroLogic 2.0) and whether the settings will be supplied by the protection study.
• Control type (toggle or rotary handle) and any accessories required.
• Delivery location in Oman or the GCC, required documents and target date.

Documents and quotation

The official English datasheet for the 33482 is attached on this page. It lists the electrical data, trip-unit settings, dimensions and environmental information used above, and carries the discontinued notice mentioned earlier.

To request a quotation, send the part number 33482, the quantity and the delivery location. Seven Star LLC is an independent supplier in Muscat and quotes according to current availability.