Schneider Electric LV525425 CVS250NA 250 A Switch Disconnector

LV525425: CVS250NA 250 A 3P switch-disconnector from EasyPact CVS

The LV525425 is a Schneider Electric EasyPact CVS switch disconnector, listed in the datasheet as the CVS250NA: three poles, a conventional thermal current of 250 A and a toggle handle on a fixed backplate base. It is built on the same moulded-case housing as the EasyPact CVS circuit breakers, but it has no trip unit. Its job is to make, carry and break load current and to provide isolation, not to clear faults. Seven Star LLC supplies the LV525425 in Oman and the GCC as an independent supplier based in Muscat.

The short name CVS250NA ends in NA, which the datasheet repeats as its breaking capacity code. On this family the letter pair marks a switch-disconnector version of the frame, so it shares the outer dimensions of a CVS250 breaker ( 105 x 86 x 161 mm). The datasheet states earth-leakage protection as without and the visible break as no.

Technical specifications of the LV525425

Isolation and standards of the LV525425

The datasheet confirms suitability for isolation (Yes conforming to EN 60947-3; Yes conforming to IEC 60947-3). The contact position indicator is listed, but there is no visible break, so lock-off and voltage testing remain part of the safe-isolation procedure. Standards listed are IEC 60947-3 / EN 60947-3, with product certifications listed as GOST / IEC, pollution degree 3 conforming to IEC 60664-1 and electrical shock protection class Class II. Operating ambient range is -25…70 °C and storage range -50…85 °C.

Typical uses of the CVS250NA in Oman and the GCC

Switch-disconnectors in this size are used as local isolators for motor control centres, pump and fan feeders, workshop supplies and as section isolators in sub-distribution boards. In Oman and the GCC the main environmental concerns are heat in unventilated switchrooms and fine dust: the datasheet allows operation from -25…70 °C, and the enclosure, not the device, supplies the dust protection.

Short-circuit data of the LV525425: why upstream protection matters

This is the most important point on the datasheet. The rated short-circuit making capacity Icm is 75 kA only when an upstream protection circuit breaker is present; the device on its own is rated 4.9 kA. The short-time withstand current Icw is 1.35 kA during 20 s conforming to IEC 60947-3, 3.5 kA during 1 s conforming to IEC 60947-3 and 3.5 kA during 3 s conforming to IEC 60947-3. Those numbers are small against the fault level of a typical 415 V board, so it must always sit behind a breaker or fuse sized for the fault level and the cable, never as the only protection of a circuit.

In practice the upstream device is chosen first, and the CVS250NA is then selected to carry the same current. If the upstream device is a CVS breaker of the same frame, the pair share cut-out dimensions and connection pitch (35 mm), which keeps busbar and cable arrangements simple.

LV525425 and the other CVS switch-disconnectors

Three switch-disconnector references appear in this group: 160 A, 250 A and 400 A. They differ in more than current, as the table shows; the 400 A version also uses the larger housing with a 45 mm connection pitch.

For the CVS250NA specifically, mechanical durability is 20000 cycles conforming to IEC 60947-3 against 25000 cycles conforming to IEC 60947-3 and 15000 cycles conforming to IEC 60947-3 on the other two, and the net weight of 2.4 kg compares with 2.2 kg and 6.05 kg. A larger frame trades fewer rated mechanical cycles for a higher current and making capacity.

Selection and installation of the LV525425

Check these points before ordering.

• Current: 250 A Ith, with AC-22A and AC-23A at 250 A.
• Protection: an upstream circuit breaker or fuse is mandatory; confirm it against the Icm and Icw values above.
• Space: 105 x 86 x 161 mm and a 35 mm connection pitch.
• Function: isolation is provided, but there is no visible break and no tripping function.
• Accessories: handles, auxiliary contacts and terminal shields are separate references; list the ones needed.

Fit it on a flat backplate with front connections, using the cut-out and fixing dimensions of the manufacturer installation instructions, which are not reproduced in the datasheet. Land the cables, check the contact position indicator against the handle, and apply the warning labels required by the site procedure. During shutdowns inspect the terminals for heat marks and clean dust from the housing; operate the handle a few times a year on a lightly loaded circuit so the mechanism does not stick in a dusty room.

Load-break ratings of the CVS250NA LV525425

The datasheet gives the rated operational current Ie as 250 A in both AC-22A and AC-23A, at 220/240 V, 380/415 V and 440 V, 50/60 Hz. AC-22A covers mixed resistive and inductive loads including moderate overloads; AC-23A covers motor loads and other highly inductive loads. Listing both at the full 250 A means it can be applied to a motor feeder without derating from the headline figure, provided the starting duty stays within the stated electrical durability.

Electrical durability is stated as AC-22A: 6500 cycles 415 V AC 50/60 Hz In conforming to IEC 60947-3, and mechanical durability as 20000 cycles conforming to IEC 60947-3. It is therefore an incomer or sectionalising device operated occasionally, not a device for frequent switching of a process load. For frequent switching use a contactor downstream and keep this switch-disconnector as the isolator.

Information to send with an RFQ for the LV525425

Please include in your request:

• Part number LV525425 and quantity.
• System voltage, frequency and the upstream protective device already installed or planned.
• Load type (motor, heater, incomer) so the AC-22A or AC-23A rating can be confirmed.
• Accessories needed, listed by reference.
• Delivery location and required documents.

Documents and quotation

The official Schneider Electric datasheet for the LV525425 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 LV525425, 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 LV525425 on your RFQ and mention any special packing, marking or documentation needed for the project file.