Schneider Electric EZC100H4100 Easypact 100 A 4P MCCB

What the EZC100H4100 is

Start with the reference. The EZC100H4100 is an EasyPact EZC100H moulded-case circuit breaker, and the datasheet title reads: circuit breaker Easypact EZC100H – TMD – 100 A – 4 poles 3d. The letter H matches the breaking capacity code H printed in the document, the 4 after it gives the pole count and 100 is the rating in amperes at 40 °C. In plain terms it is a four-pole breaker with four poles of which three are protected and the fourth (neutral) has no protection. Seven Star LLC is an independent supplier in Muscat and can quote the EZC100H4100 for projects in Oman and the GCC.

Technical specifications of the EZC100H4100

Information to send with an RFQ for the EZC100H4100

• Reference EZC100H4100 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

Selection and ordering checklist for the EZC100H4100

• 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 EZC100H4100; use the Ics column when service continuity after a fault matters.
• Decide whether the pole count is correct: four poles with a neutral pole that is not protected by the trip unit.
• Verify that the space at the panel is 100 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 EZC100H4100 covers the breaker only.

Breaking capacity of the EZC100H4100 at each voltage

The breaking capacity is the figure that decides whether a breaker may sit at a given point in a network, and the EZC100H4100 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 H class in this light: at 220–240 V AC the datasheet gives 50 kA Icu and at 400–415 V AC 30 kA Icu for the EZC100H4100. Compare these with the prospective short-circuit current calculated at the installation point, not with the nameplate of the transformer alone.

Typical applications of the EZC100H4100 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 EZC100H4100 fits in the EZC100 range

This breaker belongs to the EZC100 frame, which the catalogue offers in several pole counts and ratings. The four-pole body is 100 mm wide; three poles are protected and the fourth is the neutral pole, which is not protected by the trip unit. Other references in the same family seen in our catalogue include EZC100H4040, EZC100H4060; each has its own datasheet, and the breaking capacity depends on the frame letter, so a EZC100H4100 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.

Installation, commissioning and maintenance of the EZC100H4100

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 EN 50102, so the breaker needs a proper enclosure in dusty or damp sites.

How the EZC100H4100 protects the circuit

Inside this breaker the 100 A trip unit works with two mechanisms, as the datasheet naming (TM-D, thermal-magnetic) indicates: a heat-driven part for overloads and a magnetic part for short circuits. Rating and temperature belong together: the datasheet gives 100 A at 40 °C for the breaker and 100 A at 50 °C for the trip unit. A fixed trip unit means there is no dial to turn on site, which keeps this breaker simple to commission but means the rating must be right before the order.

Because this breaker is listed with the neutral setting “without protection” and protected poles 3t, plan the neutral conductor separately where the system needs it.

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.