MT-EZC/MOLDED CASE CIRCUIT BREAKER
100,160,250,400,630
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Model meaning：
The MTEZC series Molded Case Circuit Breaker (MCCB) is a protective device designed specifically for low-voltage distribution systems, suitable for industrial, commercial, and infrastructure fields. The following is the core description of this series of products:
Economic solution:
The EZC series focuses on high cost-effectiveness, meeting the needs of small and medium-sized power distribution, while balancing reliability and cost-effectiveness.
Application scenarios:
Suitable for power distribution protection, motor protection (with corresponding release required), building electrical systems, etc.
Breaking capacity:
Provides standard breaking capacity (such as 36kA, 50kA, etc.), covering most low-voltage distribution scenarios.
Current range:
The frame current covers 63A to 630A and supports multiple rated current options.
Place of Origin: |
5th Floor, No. 3, Jinghong West Road, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province |
Price: |
10$ |
Brand Name: |
MINGTUO |
Packaging Details: |
Carton Packaging |
Product Name: |
MT-EZC |
Delivery Time: |
Within fifteen days |
Minimum Order Quantity: |
1 |
Payment Terms: |
100% prepaid, 70%/30%, 80%/20% |
Working principle:
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Thermal Magnetic Release (TM):Equipped with overload (long delay) and short circuit (instantaneous) protection as standard.
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Product quality:
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The shell frame is made of flame-retardant and high-temperature resistant materials, and the dynamic and static contacts are made of purple copper and silver plated materials. The dynamic and static contacts are made of silver alloy material, which has high conductivity and resistance to arc erosion. All products undergo a series of tests before being sold, such as instantaneous testing, delayed testing, etc., to ensure that the appearance and functionality of the product are intact before being sold |
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Factory Testing Mechanical Operation Test: The circuit breaker is subjected to multiple opening and closing cycles to verify smooth and reliable mechanical action. Insulation Resistance Test: An insulation resistance tester measures the resistance between poles and between each pole and the grounded enclosure to ensure dielectric integrity. Dielectric Withstand Test: A high voltage (typically 2x rated voltage + 1000V) is applied for one minute to check for insulation breakdown or flashover. Temperature Rise Test: Operating at rated current, the temperature rise of terminals and contacts is monitored to confirm stability under continuous load. |
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On-Site Verification Power-On Functional Test: Verifies normal opening and closing operations after energization.
Protective Function Tests: ● Overload Protection: Simulated overload conditions are applied to confirm trip action within the specified time. ● Short-Circuit Protection: A simulated short-circuit fault is applied to verify instantaneous tripping. |
Packaging:
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Inner Packaging
● Cushioning Material:
Materials such as foam or bubble film are used to absorb shock.
● Placement:
Strategically placed around the circuit breaker, with additional layers at the top and bottom to ensure all-round protection.
External Packaging
● Carton:
Made from heavy-duty, corrugated cardboard for structural strength.
● Sealing Method:
Securely sealed with strong packaging tape or strapping to prevent the box from bursting open during transit.
Marking & Labeling
● Content:
Includes product model, quantity, gross weight, manufacturer information, and necessary pictorial handling labels (e.g., "Fragile," "This Side Up," "Keep Dry").
● Location:
All information is clearly and durably printed on the exterior of the carton.
Production Line:
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Standardized Assembly & Inspection ● Our molded case circuit breakers are manufactured using controlled assembly processes. Production follows SOPs with specialized tools and clear instructions at each stage, ensuring precision from parts installation to final calibration. ● A multi-layer inspection system is central to our process, with checkpoints for self and mutual verification after key steps. Every unit completes a full suite of factory tests—mechanical, electrical, and protective—with all data recorded to confirm specification compliance. ● Through ongoing training and standardized controls, we integrate quality requirements into every manufacturing phase to ensure consistent product reliability. |
1. Competitive pricing, factory quality assurance
2. Customizable housings
3. Extensive production and installation experience, ready to provide guidance
4. Assistance with commissioning and selection
Technical specifications (a user manual and detailed specifications will be provided after purchase).
Normal Operating and Installation Conditions
Ambient Air Temperature
The upper limit shall not exceed +40°C, the lower limit shall not fall below -5°C, and the 24-hour average value shall not exceed +35°C. Note: Operating conditions with a lower limit of -10°C or -25°C must be confirmed by the user.
Operating conditions exceeding the upper limit of +40°C or falling below -10°C or -25°C must be negotiated with the user. 3.2 The installation location must not exceed 2000m above sea level.
Atmospheric Conditions
The relative humidity must not exceed 50% at an ambient air temperature of +40°C. Higher relative humidity is permitted at lower temperatures. The maximum average relative humidity in wet months is 90%, and the average minimum temperature for that month is +25°C. Condensation on the product surface due to temperature fluctuations must be considered. If the temperature exceeds these limits, the user must consult with the user. 3.4 Protection Grade: IP30
Usage Category: Class B or Class A
Installation Category
Circuit breakers and undervoltage releases with a rated operating voltage of 660V (690V) or less, and the primary winding of the power transformer, are intended for installation category N; auxiliary circuits and control circuits are intended for installation category III.
Installation Conditions
Circuit breakers must be installed in accordance with the requirements of this manual. The vertical tilt of the circuit breaker must not exceed 5° (mining circuit breakers must not exceed 15°).
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Q: What is the voltage/current range of this product? What is its breaking capacity?
A: Please contact customer service for details.
Q: What is the minimum order quantity? Do you accept sample orders?
A: The minimum order quantity is 1 set, and we accept sample orders.
Q: What is the warranty period? How do I apply for a warranty?
A: The product warranty is 1 to 2 years. Please contact customer service directly to apply.
Q: Do you have CE, RoHS, UL, or other certifications? Can you provide certificates?
A: We have CE and RoHS certifications and can provide certificates.
Q: Does the price include tax/shipping?
A: The price does not include shipping/tax.
Q: What notable clients or project examples have you worked with?
A: State Grid Corporation of China, Chint Group.
Copyright © Zhejiang Mingtuo Electric Technology Co., Ltd.
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