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Home -products-DZ20Y-225/3300 Molded case circuit-breaker
  • product name : DZ20Y-225/3300 Molded case circuit-breaker
  • product brand : LBAJI
  • Place of Origin : CHINA
  • E-mail : [email protected]
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Detailed Instruction

Scope of Application
DZ20Y series moulded current circuit breaker(DZ20Y MCCB) is mainly used for power distribution  in lines of AC 50Hz, rated insulation voltage 660V, rated operating voltage 380/400V or below, with its rated current 16A~1250A. Among the series, Y,J,Q type circuit breaker with its rated current 225A or below and Y type breaker with frame size 400A can also be used to protect motors. Under normal circumstances, this product can also used as infrequent switching for lines and motor separately.
4P DZ20 MCCB is mainly applicable to 3 phase 4 wire system with frequency AC 50Hz, rated voltage 400V or below, rated current 16A~630A, to cut off power supply and ensure security. Thus, unlike any other circuit breaker, this type of MCCB ensure its neutral pole is without current.
DZ20 MCCB can be used to distribute power energy in grid and protect protection against overload, short circuit and under-voltage for circuits and electric equipment. Motor protective circuit breaker can used to start up and break the squirrel-cage motor in power distribution system. It can also protect the motor against overload, short-circuit and under-voltage.   
The cover of DZ20 3P MCCB with frame size current 100A-630A is transparent. So, users can check its internal operation status.
DZ20 MCCB complies with Standard GB14048.2.


Types and Specifications
MCCB/ Design code/ Rated ultimate short circuit breaking capacity level/ Frame size current/Operating method/ Number of poles/ Tripping method & accessory code/ Function code 
Notes for the meaning of type:
a.No code for power distribution. 2 for motor protective circuit breaker.
b.No code for direct handle operation, P for motor operation, Z for rotary handle(apart from MCCB with frame size current 1250A)
c.Rated ultimate short-circuit breaking capacity: C for economic type, Y for normal type, J for higher type, G highest type.

Accessory Code

Accessory name

Instantaneous tripper

Complex tripper

No accessory

200

300

Alarm contact

208

308

Shunt release

210

310

Auxiliary contact

220

320

Under-voltage tripper

230

330

Shunt release, auxiliary contact

240

340

Shunt release, under-voltage tripper

250

350

Two pairs of auxiliary contacts

260

360

Auxiliary contact, under-voltage tripper

270

370

Shunt release, alarm contact

218

318

Auxiliary contact, alarm contact

228

328

Under-voltage tripper, alarm contact

238

338

Shunt release, auxiliary contact, alarm contact

248

348

Shunt release, under-voltage tripper, alarm contact

258

358

Two pairs of auxiliary contacts,alarm contact

268

368

Under-voltage tripper, auxiliary contact, alarm contact

278

378

 
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