YS250 Molded Case Circuit Breaker

The YS250 Molded Case Circuit Breaker is designed for DC systems with a rated working DC voltage below 1000V and a rated working current ranging from 10A to 1250A. It offers protection against overload, short circuit, and under voltage, safeguarding power supply equipment and lines from damage caused by overvoltage and overcurrent.

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Features of YS250 Molded Case Circuit Breaker

  • Used in DC system with no earthing, one pole earthed, or neutral point earthed
  • Maximum 1250A carrying capacity for multiple parallel breakers
  • Arcing quench system combines VJC and lSTAC technologies
  • Operates at full load at 50℃
  • Can be mounted vertically or horizontally
  • Includes isolation function
  • Complies with lEC60947-2 and GB14048.2 standards

Applications of YS250 Molded Case Circuit Breaker

  • Medium and low voltage power systems utilize circuit protection to prevent overload, short circuit, and other faults.
  • Industrial control systems rely on circuit protection to safeguard motors, transformers, and other equipment.
  • Circuit protection is employed in household, commercial, and industrial building electrical systems. It is also utilized to protect communication equipment and lines.
  • Circuit protection is essential in the electrical systems of new energy equipment such as solar and wind energy, ensuring the safe operation of electrical equipment.

Specification of YS250 Molded Case Circuit Breaker

Parameter Value
Shell frame grade current 250
Ripping device rated current 100、125、140、160、180、200、225、250
Number of poles 4
Rated insulation voltage 1000V
Rated operational voltage DC 1000V
Rated impulse withstand voltage 8000V
Rated ultimate short-circuit breaking capacity 40
Rated operational short-circuit breaking capacity 25
Mechanical life 10000
Electrical life 5000
Flashover distance ≯50
Dimension 142X165X103mm
Overload protection 250-630 A
Protection function 100-250 A

250-360 A

Action tolerance ±20%
Work environment -40℃~+70℃