ZQM1 Molded case circuit breaker

Model meaning
ZQ M 1 – 125 L ZA / 3 3002 B 125A

ZQ -Operating current (optional)
M -Optional codes for four-pole products(A, B,C, D)
1 -Optional code for different purposes (2, “or no code”)
125 -Code of internal attachment of tripping mode
L -Number optional code (2,3,4)
ZA -External accessory code (P: electric operation,ZA round handle operation,ZF square handle manual operation)
3 -Breaking capacity (L, M, H)
300 -Shell frame grade (63,125,250,400,630,800,1250,1600)
2 -Design serial number
B -Product model
125A -Name of the company

Note:

• Divide according to the shelf frame level: Inm=63,Inm=125,Inm=250,Inm=400, Inm=630, Inm=800,lnm=125, Inm=1600;
• According to the rated breaking capacity: L standard type (35kA),M high breaking type (65kA) and H high breaking type (125kA);
• According to the operation mode: there is no code fordirect operation of the handle ; P means electric operation;Z means rotary handle operation;
• Optional rated current:
ZQM1-63 is 10、16、20、25、32、40、50、63;
ZQM1-125 is 16、20、25、32、40、50、63、80、100、125;
ZQM1-250 is 100、125、140、160、180、200、225、250;
ZQM1-400 is 225、250、315、350、400;
ZQM1-630 is 400、500、630;
ZQM1-800 is 630、700、800;
ZQM1-1250 is 800、1000、1250;
ZQM1-1600 is 1000、1250、1400、1600.
• Optional code according to the number of poles: one pole, two poles, three poles and four poles.Optional code of tripping mode and internal accessories: the first digit indicates the tripping mode;
The last two digits indicate the internal accessory code, 2 indicates electromagnetic tripping (instantaneous), and 3 indicates multiple tripping (thermal+electromagnetic);
• Optional codes for different purposes: no code for power distribution, 2 for motor protection.
• Optional code of quadrupole products
Type A: the N- pole is not equipped with overcurrent tripping element, and N-pole is always connected, and it is not closed or opened with other three poles;
Type b: N-pole is not equipped with overcurrent tripping element, and N-pole is closed and opened together with other three poles;
Type c: N-pole is installed with overcurrent tripping element, and N-pole is closed and opened together with other three poles;
Type d: N-pole is installed with overcurrent tripping element and N- pole is always connected not closed and opened together other three poles.
• According to the wiring mode, it can be divided into front panel wiring, rear panel wiring,plug-in rear panel wiring and plug-in front panel wiring.
• Other accessories are mechanical interlocking (mechanical interlocking between two circuit breakers).

Applicable working environment and installation conditions

• The altitude of the installation site is 2000m and below;
• The temperature of surrounding medium shall not be higher than +40℃ and not lower than-5℃; and the 24-hour average value shall not exceed 35°C(except for special orders);
• The relative humidity of the air at the installation place shall not exceed 50% when the maximum temperature is +40°C; There can be a higher relative humidity at a lower temperature. The average maximum temperature of the wettest month shall not exceed+25℃ , and the average maximum relative humidity of the month shall not exceed 90%.The condensation on the product surface caused due to temperature change shall be considered.
• The pollution level is 3;
• Protection grade: IP20;
• The installation category of the main circuit of the circuit breaker is l.and the install category of the auxiliary circuitand control circuit not connected to the main circuit is Ⅱ;
• In the place where there is no explosion medium and there is no gas and conductive dust that can corrode metaland damage insulation;
• In the place free from rain and snow;