DAM1-250 MCCB Molded Case Circuit Breaker
Introduction
The DAM1-250 molded case circuit breaker operates in an equivalent manner to combination fuse-switches and thermal relays. The molded case circuit breaker is specially designed to distribute electrical energy, start asynchronous motors at infrequent intervals, protect power lines and motors, and automatically cut off the circuit in the case of serious overload, short circuit, and under voltage fault conditions.
Application
DAM1-250 molded case circuit breakers are low-voltage circuit breakers. They meet the installation needs of small users all the way to large industrial substations and power distribution systems. They are commonly applied in steel mills, oil platforms, hospitals, railway systems, airports, computing centers, office buildings, convention centers, theaters, skyscrapers, and other large scale structures.
| Breaking capacity code | N | S | H | G |
| Rated current of frame size | 250A | |||
| Rated current | 63,80,100,125,160(180),200(225),250(320)A | |||
| Rated insulation voltage | 750V | |||
| Rated operating voltage | 400/415V | |||
| Number of poles | 3P/4P | |||
| Rating limit short-circuit breaking capacity | 35KA | 50KA | 65KA | 85KA |
| Rated operation short circuit breaking capacity | 26.25KA | 37.5KA | 48.75KA | 51 KA |
| Rated short-time making capacity | 77/0.25 | 114/0.25 | 143/0.2 | 178/0.2 |
| Rated impulse withstand voltage | 8000V | |||
| Dielectric properties | 3000 | |||
| Flashover distance | ≤30mm | |||
Physical parameters of DAM1-250 MCCB molded case circuit breaker
Total number of available times: 8,000
Electrical endurance: 1,000
Mechanical endurance: 7,000
Overcurrent release: Thermal magnetic fixation, thermal tunable (0.7-1In), dual tunable (heat tunable 0.7-1In, magnetic tunable 5-10In), electronic
Use main circuit A/O, use auxiliary circuit and control circuit AC-15
Weight (stationary type): 2.7/3.5(N, S); 41.5/5.5(N, S)
Weight (plug-in type): 3.2/4.2(N,S); 4.6/6(N,S)
Weight (extractable type): 3.6/4.6(N, S); 5/6.4(N, S)
| Specification | 3P | 4P |
| Width W*Length L*Height H (mm) | 105*170*103.5 | 140*170*103.5 |
Optional accessories of DAM1-250 molded case circuit breaker
Undervoltage trip, shunt trip, auxiliary contact, alarm contact, auxiliary alarm contact, manual manipulation, electric operation, hanging buckle, flashboard, clapboard.
Working principle
The main contact of DAM1-250 molded case circuit breaker is manual manipulation or electric closing. After the main contact is closed, the free release mechanism locks the main contact into the closing position. The overcurrent trip coil and the thermal trip element are connected in series with the main circuit. The undervoltage trip coil and the power supply are connected in parallel.
DADA company manufactures miniature electrical switches such MCB Circuit breakers, RCD circuit breakers, ELCB breakers, RCBO, RCB circuit breakers, molded case circuit breaker, DADA started miniature circuit breaker manufacturing from 2004, already offered million various electrical circuit breakers into global markets for different electrical MCB breaker clients.
Index
electrical switch, MCCB, low voltage circuit breaker, circuit protector
