Schneider Electric LV525608 CVS250B 250 A 3P Circuit Breaker

LV525608: CVS250B 250 A EasyPact CVS breaker, TM-D thermal-magnetic trip

The LV525608 is a Schneider Electric EasyPact CVS moulded-case circuit breaker, listed in the datasheet as the CVS250B: three poles, all three protected (3P 3D), with a TM-D thermal-magnetic trip unit rated 250 A. It is a fixed, backplate-mounted distribution breaker with front connections and a toggle handle, intended to protect a feeder against overload and short circuit. Seven Star LLC supplies the LV525608 in Oman and the GCC as an independent supplier based in Muscat.

Reading the reference from the datasheet: the short name CVS250B combines the CVS family, the 250 A frame size (compatibility code CVS250) and the breaking-capacity letter B, which the datasheet repeats as its breaking capacity code. Within the same frame, the letter changes the Icu and Ics figures, not the physical size. The 250 A figure is the rated current of the trip unit, stated by the datasheet at 50 °C for In and 40 °C for the trip unit rating. Orders must therefore be checked on three items together: frame, breaking letter and ampere rating.

Technical specifications of the LV525608

LV525608 and the other CVS250 breakers

Parts of the same frame (CVS250) found in the same batch are listed below so that the LV525608 can be told apart from its neighbours. The table shows only data taken from each datasheet. Compared with the closest relative, LV525623 (CVS250F, 250 A, breaking code F), this part has a different breaking class, which changes the trip thresholds and fault duty rather than the physical size.

Trip unit and settings of the LV525608

The thermal element handles overload: the long-time pick-up Ir is adjustable from 0.7 to 1 times In, so on this 250 A unit the thermal setting can be placed between about 175 A and 250 A. The long-time delay is fixed, as is the short-time delay.

The magnetic pick-up of this breaker is fixed at 2500 A, which is 10 times In. Because the long-time and short-time delays are listed as fixed, selectivity with downstream breakers depends on the magnetic level and on the upstream and downstream ratings, so check the manufacturer coordination tables where selectivity is required.

Selection checklist for the LV525608

Use these checks before ordering; they are drawn from the datasheet fields and avoid the most frequent mismatches.

• Frame and short name: confirm CVS250B and compatibility code CVS250; the dimensions 105 x 86 x 161 mm must fit the enclosure and the connection pitch is 35 mm.
• Rating: 250 A, with 2500 A for the magnetic threshold.
• Fault level: compare the prospective short-circuit current with ? kA Icu at 380/415 V AC (or ? kA at 440 V).
• Poles: 3P with all poles protected (3D) and no earth-leakage block, as the datasheet lists.
• Mounting: the datasheet lists fixed mounting on a backplate with front connections.
• Ambient: operation -25…70 °C, with the rated current stated at 50 °C and the trip unit rating at 40 °C.

Installation and maintenance of the LV525608

Mount it on a flat backplate and connect from the front; the datasheet lists screw terminals where applicable and a connection pitch of 35 mm. Torque values and cable sizes are not in the datasheet, so follow the manufacturer installation instructions. After the cable is landed, close and open the toggle several times and check that the contact position indicator follows the handle.

Commissioning means setting Ir from the front; the dial should be set to the cable ampacity or the load current, not left at the maximum by habit. Maintenance is mostly visual: look for heat discolouration at terminals, dust build-up and loose lugs at each shutdown. Mechanical durability is listed at 20000 cycles and electrical durability at 10000 cycles 415 V In conforming to IEC 60947-2, so it is designed for occasional operation rather than as a frequent switching device.

Where the LV525608 fits in Oman and the GCC

In Oman and the GCC this class of breaker is typically specified for sub-distribution boards, pump and fan feeders, workshop and camp supplies, and utility rooms in commercial and light-industrial buildings, where a compact fixed breaker is enough. Summer heat in unventilated switchrooms and fine desert dust make enclosure cooling and cleaning part of the design: the datasheet states an operating range of -25…70 °C and an IP degree of see datasheet for the breaker itself, so the enclosure has to provide the real protection.

Breaking capacity of the CVS250B LV525608

For the LV525608 the datasheet gives an Icu of 40 kA at 220/240 V AC, and service breaking capacities Ics of 15 kA at 440 V AC, 25 kA at 380/415 V AC and 40 kA at 220/240 V AC, all to IEC 60947-2. No Icu values are printed for 380/415 V or 440 V on this reference, so any study at those voltages should rely on the Ics figures above and be confirmed with us before ordering.

Ics is the more practical number for an operator: it is the breaking capacity after which the breaker is rated to remain in service. Here Ics is 0 per cent of Icu at 415 V, which is worth noting when comparing with a breaker of another make. Prospective fault current at the busbar must not exceed the Icu at the system voltage.

Information to send with an RFQ for the LV525608

To quote the LV525608 quickly, please send the following with your request:

• Part number LV525608 and quantity.
• System voltage and prospective short-circuit current at the board.
• Required Ir setting range and the load or cable the breaker will protect.
• Whether accessories (auxiliary contacts, terminal shields, rotary handle) are also needed; these are separate references and must be confirmed against the product family.
• Delivery location and required documents.

Documents and quotation

The official Schneider Electric datasheet for the LV525608 is attached on this page, so the figures quoted above can be checked line by line against the manufacturer document. Please send the part number LV525608, the quantity and the delivery point in Oman or elsewhere in the GCC, and we will reply with availability and lead time.

Seven Star LLC is an independent supplier based in Muscat. We work independently of the manufacturer; we source, check the reference against the datasheet and quote. Ask for the LV525608 on your RFQ and mention any special packing, marking or documentation needed for the project file.