Yueqing Saip Electric Company Limited
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  • Contact Person : Mr. Huang Danny
  • Company Name : Yueqing Saip Electric Company Limited
  • Tel : 0086-577-62760721-8001
  • Fax : 0086-577-62760731
  • Address : Zhejiang,Wenzhou,No. 8, Floor 2, Xiangyang Road, Liushi, Yueqing City
  • Country/Region : China
  • Zip : 325604

2012 new hydraulic Magnetic Circuit Breaker

2012 new hydraulic Magnetic Circuit Breaker
Product Detailed
Hydraulic electromagnetic circuit breaker 1. PC safe material 2. High precision, reliability 3. Enough delay time 4. CE,ROSH

Hydraulic electromagnetic circuit breaker:

  It can effectively solve Hydraulic electromagnetic circuit break: the most design problem of high precision, reliability and cost, It has advantages of thermal circuit breakers without their disadvantages. Talking the stability of temperature into consideration, the hydraulic electromagnetic circuit breaker is not influenced by the change of environmental temperature. The hydraulic electromagnetic sensing mechanism only responds to the change of current in protection circuit. Neither does it have “heating” cycle to show response to overload, nor does it have “cooling” cycle prior to its close again after overloading. When exceeding 125% of the full load value, it will trip. The delaying time of the circuit breaker shall be enough long to avoid misoperataiong of tripping due to nondestructive instantane-ous fluctuation. But when the malfunction occurs, the tripping of degree of overcurrent, and it varies from several millise-conds to several minutes. With high precision, reliability, universal purpose and solid functions, the hydraulicelect-romagnetic circuit breaker is the ideal device for automatic circuit protection, power conversion and circuit.

Tripping principle of hydraulic electromagnetic circuit breaker:

  The ordinary wiring method of hydraulic electromagnetic circuit breaker is “series tripping”. It is composed of a current sensing coil and a group of contact connected in series (figure 1).

Inside the coil, there is a non-magnetic delaying tube, with built-in offset spring and moveable iron core. The armature makes the contact connect with coil mechanism, with the function as an electromagnetic. When the contact is disconnected, no current passes the circuit breaker and no electromagnetic energy is produced by the coil. When the contact is closed, the current start to flow(figure 2).

During normal operation or when the “rated” current passes the sensing coil. When the current increases, the intensity of magnetic field increases and the moveable iron core offset by the spring is dragged to the pole shoe, When the iron core moves inside, the efficiency of magnetic loop increase and larger electromagnetic force is produced. When the iron core is completely sucked, the maximum electromagnetic force is achieved and the armature is sucked to pole shoe and the tripping mechanism trips to disconnect the contact (figure 3).

Under the condition of short circuit, the resultant force of electromagnetic energy is increased so rapidly that even the iron core is not moved, the armature is sucked and the circuit breaker is caused to trip without any time delaying. This is called as “instantaneous tripping”. This is a safe component, which can get very rapid tripping response when it is urgently needed (figure 4).

Scope of application:

  QE series hydraulic electromagnetic circuit breaker (hereinafter referred to as circuit breaker) is applicable for making and breaking operation for circuit or equipment in AC 50 HZ or 60 HZ electrical system with the rated voltage of 250V and the rated current of 1A to 100A, and it is also application for protecting overload and short circuit of circuit and motor.

  The circuit breaker is widely used for computer and its peripheral equipment, industrial automatic device, telecommunication equipment, telecommunication power supply and UPS uninterrupted power supply equipment, as well as railway vehicle, electrical system for ships, elevator control system and moveable power supply equipment etc. Especially it is applicable for locations with impact or vibration.

  The circuit breaker conforms to GB 17701-1999, IEC60934: 1933 and C 22.2 standards.

Normal working and installation conditions:

Environment air temperature: Upper limit is +85 centigrade and lower limit is -40 centigrade.The altitude shall be not higher than 2000m.Temperature: The relative humidity of air at the installation and use location of circuit breaker shall not exceed 50% when the temperature is +85 centigrade. The average lowest temperature in the wettest month shall not exceed 25 centigrade, and the maximum relative humidity of the month shall not exceed 90% centigrade.The circuit breaker can be installed at locations with prominent impact and vibration.

Main technical parmeters:

Product modelSP-30SP-50SP-25
Rated current1A-50A1A-100A1A-30A
Rated voltageAC250V 50/60HZ
Pole number1P 2P 3P 4P1P 2P 3P 4P2P
Wiring methodBolt type, push-pull typeBolt typePush-pull type
Installation methodInstallation before panelInstallation before panelInstallation before panel

Operation characteristics of over-current release:

Trip currentOperating time(s)
1 In1.25 In2 In4 In6 In
Ano operation2S-40S0.5S-5S0.2S-0.8S0.04S-0.3S
Bno operation10S-90S0.8S-8S0.4S-2S0.08S-1S
Cno operation20S-180S2S-10S0.8S-3S0.1S-1.5S

  

Tripping characteristic curve:

2012 new hydraulic Magnetic Circuit Breaker



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