Introduction:
- CNTN Electric molded-case circuit breakers offer reliable performance with a rated insulation voltage of up to 800V. The ZMM1-63 model is designed for 400V applications, with the full series covering current ratings ranging from 63A to 800A. Capable of stable operation in 50Hz AC environments at 690V and below, these breakers are specifically engineered for motor circuits involving infrequent switching operations.
- Our molded case circuit breakers are equipped with overload, short‑circuit and under‑voltThis MCCB offers flexible installation options, including fixed, plug‑in and draw‑out types, and can be mounted vertically or horizontally.age protection, which safeguards circuits and electrical equipment from damage.
- Our circuit breakers feature high short‑circuit breaking capacity and fast arc extinction, making them an ideal choice for users.
- Molded case circuit breakers from CNTN Electric adopt high‑flame‑retardant materials to isolate electric arcs effectively, with dustproof, moisture‑proof and electric‑shock‑proof functions. They can be directly installed in power distribution cabinets or outdoor boxes to prevent accidental contact with live parts.
- This MCCB offer flexible and versatile installation options, supporting fixed, plug-in, and withdraw-able mounting, and can be installed vertically or horizontally.
- CNTN Electric can not only produce MCCB 250A 4-pole circuit breakers but also 250A 2-pole and 250A 3-pole versions according to customer requirements.
- Our MCCB is suitable for three-phase four-wire circuits, and can also be used for three-phase three-wire and three-phase two-wire circuits.
- CNTN Electric not only manufactures MCCB 250A 4-pole circuit breakers in AC types, but also produces DC molded case circuit breakers.
- CNTN Electric supplies molded case circuit breakers with bakelite‑made white arc shields, as well as grey and black plastic arc shield versions.
- Would you like to know the price of our 250A 4 Pole MCCB? Please contact us for more details now!
Technical data
| Type | ZMM1-63 | ZMM1-125 | ZMM1-160 | ZMM1-250 | ZMM1-400 | ZMM1-630 | ZMM1-800 | ||||||||
| Plose | P | 3 | 3,4 | 2,3 | 3,4 | 3 | 2,3,4 | 3,4 | 3,4 | 3,4 | |||||
| Rated current In | A | 10, 16,20, 25,32, 40,50, 63 | 10, 16,20, 25,32, 40,50, 63,80, 100, 125 | 100,125,140,160 | 100, 125,140 160,180, 200225, 250 | 225,250,315,350,400 | 400,500,630 | 630,700,800 | |||||||
| Rated insulation voltage Ui | V | 500 | 800 | ||||||||||||
| Rated impulsewithstand voltage Uimp | V | 6000 | 8000 | ||||||||||||
| Rated operation voltage Ue | V | AC400 | AC400/690 | ||||||||||||
| Breaking capacity class | L | M | L | M | L | L | M | L | M | L | M | L | M | ||
| Limit short-circuitbreaking capacity Icu | kA | 230V | 35 | 50 | 35 | 50 | 35 | 35 | 50 | 50 | 75 | 50 | 75 | - | - |
| 400V | 25 | 35 | 25 | 50 | 35 | 35 | 50 | 50 | 65 | 50 | 65 | 75 | 75 | ||
| 690V | - | - | 8 | 10 | 8 | 8 | 10 | 10 | 20 | 10 | 20 | - | 30 | ||
| Working short-circuit breaking capacity Ics | kA | 230V | 18 | 50 | 18 | 50 | 22 | 22 | 50 | 50 | 50 | 50 | 50 | - | - |
| 400V | 18 | 22 | 18 | 25 | 18 | 18 | 25 | 35 | 32.5 | 35 | 42.5 | 50 | 50 | ||
| 690V | - | - | 4 | 5 | 4 | 4 | 5 | 5 | 10 | 5 | 10 | - | 15 | ||
| Arcing distance | mm | 50 | 100 | ||||||||||||
| Operating frequency | Electrical life | 3000 | 3000 | 3000 | 3000 | 2000 | 2000 | 2000 | |||||||
| mechanical life | 20000 | 20000 | 20000 | 20000 | 10000 | 10000 | 10000 |
Codes for release devices and accessories
ZMM1-125 (L, M) front panel wiring (2-pole, 3-pole, 4-pole) (X-X, Y-Y are the centers of the 3-pole circuit breaker)
ZMM1-125 (L, M, H) Plug-in Front Panel Wiring (3-pole) (X-X, Y-Y are the centers of the 3-pole circuit breaker)
