Westhomes Electric Type Fixed Circuit Breaker Wcm7EL 35ka-85ka ODM OEM 1-4p

The "Electric Type" designation refers to the operating mechanism and actuation style of this particular WCM7EL variant — typically motor-operated or electrically controlled closing/tripping rather than purely manual handle operation. It is designed for remote switching, automation integration, and applications where the breaker needs to be controlled from a control room or building management system. The core breaking performance (35kA–85kA) and IEC 60947-2 compliance are shared across the WCM7EL family.

A motor mechanism uses a small geared electric motor to charge the spring operating mechanism and close the breaker on an electrical signal (typically 24V DC or 220V AC control voltage). Tripping can still be performed locally via the pushbutton or remotely via shunt undervoltage release. This allows the breaker to be incorporated into SCADA systems, automatic transfer schemes, and sequenced load-management applications without a person physically approaching the panel.

The WCM7EL Electric Type covers 35kA, 50kA, 65kA, and 85kA frame sizes at 400V/415V AC. To select the correct rating, calculate the prospective short-circuit current (PSCC) at the breaker location using transformer kVA, impedance, and upstream cable impedance, then choose a breaker with Icu (ultimate breaking capacity) equal to or exceeding that PSCC. It is prudent to leave a safety margin — for example, if calculated PSCC is 48kA, select the 50kA or 65kA frame.

The WCM7EL Electric Type is available in 1-pole (1P), 2-pole (2P), 3-pole (3P), and 4-pole (4P) versions. 3P is the most common for three-phase industrial distribution; 4P adds neutral switching for applications requiring full isolation of neutral (e.g., switched neutral, earthing system separation). 1P and 2P versions are used for single-phase sub-distribution and control circuits within larger three-phase installations.

Yes, Westhomes offers ODM/OEM customization for the WCM7EL series, including custom printing of your brand logo, bespoke trip-curve settings, alternative auxiliary contact configurations, matching terminal lug options, and tailored packaging. For larger orders, frame-size and accessory combinations can be configured to match specific panel-builder or system-integrator requirements. Contact the sales team for minimum order quantities and lead times.

The Electric Type WCM7EL can be fitted with either thermal-magnetic or electronic (microprocessor) trip units. Thermal-magnetic versions provide fixed overload and instantaneous protection — ideal for straightforward motor or feeder protection where adjustability is not required. Electronic versions offer fully adjustable Ir, tr, Isd, tsd, and Ii settings for selective coordination, plus optional ground-fault protection and communication modules for remote monitoring.

Fixed-mounted WCM7EL breakers are bolted to the panel or snapped onto a DIN rail via a mounting adapter. The breaker itself cannot be withdrawn live, but its modular accessories (auxiliary contacts, shunt trips, undervoltage releases) can be side-mounted without removing the breaker from the circuit. For full replacement, the upstream supply must be isolated, after which the breaker unbolts or unclips in minutes.

Routine maintenance includes checking terminal tightness to the manufacturer's torque specification annually, inspecting the mechanism for dust or contaminants, and verifying operation via manual trip/close exercises. The motor-charging mechanism should be checked every 2–3 years for brush wear (if applicable) and spring tension. Electronic trip units should be tested with a primary-current injection tester every 3–5 years to confirm tripping accuracy. Keep the panel interior clean and within rated temperature and humidity limits.

Yes, the WCM7EL Electric Type is manufactured and type-tested to IEC 60947-2, which governs low-voltage circuit-breaker performance, safety, and marking. This covers rated operational voltage (Ue), rated current (In), ultimate and service short-circuit breaking capacity (Icu, Ics), short-time withstand (Icw), and operational endurance. IEC 60947-2 certification allows the breaker to be specified on international tenders and accepted by certification bodies such as KEMA, CESI, or regional notified bodies.

The Electric Type is used wherever remote or automatic operation is required: main incomers on automatic transfer switch (ATS) panels, generator breaker interlocking, process-plant distribution boards with SCADA control, data center PDU feeds, and smart-building switchboards. It is also selected for high-fault-current industrial feeders — such as those downstream of 2000kVA+ transformers — where 35kA–85kA breaking capacity is necessary and remote tripping improves operational safety.