Schneider Electric EZC100F3100 Easypact 100 A 3P MCCB

EZC100F3100: Easypact EZC100F 100 A three-pole thermal-magnetic breaker

The EZC100F3100 is a Schneider Electric circuit breaker from the EasyPact EZC range. The datasheet describes it as: circuit breaker Easypact EZC100F – TMD – 100 A – 3 poles 3d. Decoding the reference with the datasheet: EZC100F is the frame and breaking-capacity class (the datasheet states breaking capacity code F), the digit 3 is the number of poles, and 100 is the rated current in amperes. For this reference that means three protected poles for a three-phase feeder, with a TM-D thermal-magnetic trip unit. Seven Star LLC supplies the EZC100F3100 in Oman and the GCC as an independent supplier based in Muscat.

Technical specifications of the EZC100F3100

Selection and ordering checklist for the EZC100F3100

• Confirm that 100 A at 40 °C is the right continuous rating for the cable and the load; the trip unit rating in the datasheet is 100 A at 50 °C.
• Check that the voltage at site is covered by the Ue entries: 550 V AC 50/60 Hz; 250 V DC.
• Compare the prospective short-circuit current with the Icu table for the EZC100F3100; use the Ics column when service continuity after a fault matters.
• Decide whether the pole count is correct: three poles for a three-phase feeder without neutral switching.
• Verify that the space at the panel is 75 mm wide, 130 mm high and 60 mm deep, plus the clearance required for connections.
• Check the supply of accessories separately; the datasheet for the EZC100F3100 covers the breaker only.

Information to send with an RFQ for the EZC100F3100

• Reference EZC100F3100 and the quantity required
• Supply voltage, AC or DC, and frequency at the point of installation
• Prospective short-circuit current at the installation point
• Load current and cable size so that the 100 A rating can be confirmed
• Delivery location and required date
• Whether the breaker is for a new panel or a like-for-like replacement

How the EZC100F3100 protects the circuit

The TM-D trip unit of the EZC100F3100 is thermal-magnetic, and the datasheet lists overload protection and short-circuit protection as its protection types. The thermal element reacts to sustained current above the 100 A rating by heating a bimetal until the breaker opens, so a moderate overload is tolerated for a time while a heavy one trips quickly. The magnetic element reacts to a short circuit without deliberate delay. The datasheet does not give the setting thresholds in the text, so for coordination the manufacturer curves on the last pages of the datasheet should be used.

Because the EZC100F3100 is listed with the neutral protection setting “without protection”, it is a breaker for the live conductors only; the neutral is handled elsewhere in the design.

Typical applications of the EZC100F3100 in Oman and the GCC

A 100 A breaker of this type is normally found in sub-distribution boards and larger single feeders. In Oman and the GCC such devices appear in commercial buildings, workshops, site cabins, utility rooms and the auxiliary panels of industrial plants, including oil and gas, power and water installations. The datasheet marks the device application as distribution.

Heat is the main practical concern: a panel in direct sun can run well above the 40 °C reference of this breaker rating, so check the panel temperature, ventilation and derating rules with the panel builder. Dust and humidity favour a sealed enclosure with the IP rating checked for the whole panel, not only the breaker.

Where the EZC100F3100 fits in the EZC100 range

This breaker belongs to the EZC100 frame, which the catalogue offers in several pole counts and ratings. The three-pole body is 75 mm wide at the same 25 mm pole pitch, the common choice for a three-phase feeder. Other references in the same family seen in our catalogue include EZC100F3060, EZC100F3080; each has its own datasheet, and the breaking capacity depends on the frame letter, so a EZC100F3100 cannot be exchanged for an EZC100F or EZC100N breaker of the same rating without checking the figures above.

The datasheet lists the breaker as fixed on a backplate with front upstream and front downstream connections, so it goes into a panel designed for backplate mounting rather than a DIN-rail layout.

Breaking capacity of the EZC100F3100 at each voltage

The breaking capacity is the figure that decides whether a breaker may sit at a given point in a network, and this breaker datasheet lists it per voltage and per pole condition. The ultimate breaking capacity (Icu) is listed first, followed by the rated service breaking capacity (Ics).

Read the F class in this light: at 220–240 V AC the datasheet gives 25 kA Icu and at 400–415 V AC 10 kA Icu for this breaker. Compare these with the prospective short-circuit current calculated at the installation point, not with the nameplate of the transformer alone.

Installation, commissioning and maintenance of the EZC100F3100

Mount this breaker on a flat backplate and keep the front connections accessible. The datasheet gives a mechanical durability of 13000 cycles, so operating the handle for routine tests is within the stated life, but it should not be used as a daily switch. The control type is toggle and the local signalling is positive contact indication, which lets an operator see the contact state at the front.

Before energising, check terminal tightness against the cable manufacturer and panel instructions and compare the trip unit marking with the cable rating. During maintenance, look for discolouration at the terminals, which is a common sign of a loose connection, and keep a record of the breaker reference. The datasheet gives an operating temperature of -25–70 °C and a storage temperature of -35–85 °C, with IP and IK degrees of IP20 conforming to IEC 60529 and IK07 conforming to IEC 62262, so the breaker needs a proper enclosure in dusty or damp sites.

Documents and quotation

A datasheet for this breaker is attached on this page. It lists the electrical, mechanical and environmental data summarised above, and it should be read together with the manufacturer installation instructions before the final design.

Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.