YFM2LE Residual Current Action Protection Circuit Breaker (Iintelligent type)

• Residual  current  protection  function

• Set the working mode

  Leakage current action value:greater than 0.751△

  Leakage current inactive value:less than 0.51△。

  Leakage current alarm value:greater than or equal to 0.61△

  Operation  time:0.5s(Max  disconnect  time)

• Automatie tracking mode

Automatic tracking shift conditions:

Downshift:less than 0.5l.for 2 minutes

Up-shift: greater than 0.5l., and for i minute

In automatic tracking mode, power on initially works in the highest gear. When the gear down condition is met, thatis, the actual remaining current is less than 0.5 times of the value of the next gear and lasts for 2 minutes, the gearwill be automatically adjusted to the next gear, When the condition of gear adjustment is met, that is, the actualremaining current ls greater than 0.5 times of the value ofthe gear and less than 0.75 times for 1 minute, the gear wilbe adjusted to the upper gear.

In a certain gear (except the maximum gear) when the remaining current is greater than 0.75l n, the switch delayaction is opened, the action time is referred to the fixed working mode action time, and the gear is raised to the uppergear aiterre-closing.

• Performance index

Resldual current measurement accuracy: error less than +5%

Residual current protection accuracy: error less than +10%

Operation time accuracy: +10%

• Overloadlong delay protection function

The overload long delay protection function is generally used to protect the cable from overload, which is based onthe true effective value(RMS) of the current.

Overload long delay related setting parameters and characteristicsOverload long dalay trip satting current l.

250Aframe:(100A,125A,140A,160A,180A,200A.225A.250A)+OFF

630A frame:(200A,225A,250A315A,350A,400A.630A)+0FFOverloadlongdelaysetting time t.:3-18s

overload operatingrange:

s1.05lR,no action within 2 hours

I>1.3lR,action within 1 hour

Operation currentaccuracy: +10%

Operation time accuracy: ±10%

• Rated current 250Along delay operation schedule

• Rated current 630Along delay operation schedule

• Rated limit short-circuit breaking capacity

• Short circuit instantaneous protection function

The instantaneous protection function prevents the solid short circuit of the distribution system, which is generallyan interphase fault, and the short circuit current is relatively large and needs to be quickly disconnected. Thisprolection is based on current true effective value (RMS) prolection.Short clrcuit instantaneous related setting parameters and characteristicsShort circuitinstantaneous trip setting current l, = 4~14In+ОFF

• Short-circuit instantaneous action characteristics: ls 0.8l, no action; l>1.2 l. action.Operating current accuracy +10%

Operation time Ts200ms