↘原装正品↘大量库存
→全国联保→欢迎选购
东莞市百鑫机电有限公司
15820853113 陈小姐
固话：0769-3383 8845
QQ:1092405494
Agent:
Fuji, Mitsubishi, ABB vacuum circuit breaker VCB
Frame circuit breaker ACB moulded case circuit breaker MCCB
ELCB leakage circuit breaker miniature circuit breaker MCB
Thermal relay of AC contact electrical accessories
1 high quality [original authentic, Quanguolianbao, fake a compensable ten]
Because we are the most professional low-voltage electrical suppliers,products equipment, accessories, supplies, our products are high quality and security! We very much hope and customers to establish long-term stablecooperative relations, all our products are quality assurance! We will provide amethod of use for each product for the customer, in order to reduce the loss.If found quality problems of the products of our company, as long as wepromised, would be responsible for what.
2 energy saving and environmental protection
More professional consulting service! The company has specialized technical personnel responsible for customer service at any time to provide equipment maintenance, production process and product use and technology above foryour advice.
3 integrity management [happy] cooperation
More preferential price, reliable quality, high performance price ratio is the most important. And we will be a little less money than their counterparts, to let customers Dumbledore point! Help customers reduce production costs,increase production profit.
Working voltage rated voltage 1 air circuit breaker must be greater than orequal to the line. [the rated load voltage or power greater than or equal to theswitch, because it related products safety performance. A voltage higher than a switch rated voltage may cause insulation products performance decline, the existence of hidden accidents. ]
Rated short circuit 2 air circuit breaker on the maximum short-circuit currentbreaking capacity than may appear in a line. [short circuit current between thephase line and phase line and phase line and the neutral line occurs in the lines is great, is closer to the current power distribution terminal is greater,because the whole short circuit impedance is small. Therefore asked the air circuit breaker must have some short circuit breaking capacity, when short circuit breaking capacity greater than or equal to the maximum short-circuit current may appear in line, in the instantaneous tripping device under the action of the switch can be instantaneous arc extinguishing breaking. Such aspossible rated short-circuit switch capacity is less than or equal to the line in the maximum short-circuit current for switching cannot extinguish the arc, the high temperature caused by arcing the contact adhesive (short circuit) todestroy the distribution lines that equipment. ]
The load current rated current is more than or equal to 3 lines of air circuit breaker. [rated current rated current load must be equal to or less than theswitch, generally less than the rated current of the switch, consider leaving a certain margin, generally choose the rated current of the switch is larger than the actual load current big 20 percent or so, don't choose too high, must consider the overload protection and short-circuit protection can action, select too high rated current, overload protection out of action, as the line thickness and length of relationship, the short circuit current load end did not reach thesetting action instantaneous release value, so that the short circuit protection failure. ]
Nominal leakage action current 4 leakage of air circuit breaker must begreater than or equal to the leakage current is 2 times the line already exists.[in the distribution line as the line insulation resistance with time growth will decline and wiring of distributed capacitance on the existence of more or lesson line leakage current must exist, and some also relatively large, so in thenominal leakage action current selection leakage of air circuit breaker must be greater than two times before the actual leakage current switch will notguarantee misoperation, half of which is with the national standards for rated operation current rated current action is consistent with the. ]
The switching action of 5 air circuit breaker terminal can make the selection of B, C, D type of instantaneous release single relatively short circuit, for different types of load (electrical equipment) selection of instantaneous release of different currents and the corresponding grade products. According to the different load equipment choose different types of instantaneous release and the rated current, a description of the use of the object in front of B, C, D type of instantaneous tripping device. Select the rated current and instantaneous tripping device corresponding must consider the maximum short-circuit current rated current load and the possible output. When the maximum short-circuit current is greater than or equal to B, C, D type ofinstantaneous tripping device setting value, short circuit protection works.
6 prior to loading protector of leakage of electricity must supply protectiontype figure out the original, so as to judge whether can be directly installed orneed to change. [power supply protection type in front there are detailed instructions. Before the leakage of air circuit breaker is not installed, some of the equipment has taken some power supply protection type, but there are some type of protection such as no change is not suitable for directinstallation of leakage air circuit breaker, otherwise it will cause the switchmisoperation or maloperation. The specific use case analysis will be carried out in the back
7 the provisions of the import line products must be in strict accordance with the requirements of wiring, import and line can not reverse connection. [the leakage of air circuit breaker wiring must be according to the requirements,otherwise it will cause damage protection function switch leakage, due to the work of the power leakage protection circuit board from the outlet end of the switch leads, the wiring circuit board, then the working power supply of long-term, once the leakage protection action, the internal electromagnetic tripping coil damage because of long-term electricity (design of the electromagnetictripping coil for instantaneous mode), the leakage function damage.
Instructions for use
Safety precautions
1 may not touch the terminal area, otherwise it will get shocked.
2 if the difference between the residual current and loop current exceeds the set value, the action of leakage circuit breaker. State diagram expressed in the non detection of earth leakage. Therefore, must not touch the two exposed charged body. If the occurrence of shock, the circuit breaker can not act.
Installation instructions:
1 must be made by the electrical qualified operators (electrician) for electrical work.
2 before connection, disconnect the upstream breakers, ensure that there will be no current flows through the wire circuit breaker, otherwise it will cause
The risk of electric shock.
The 3 connecting any lead, torque fastening screw terminals in accordance with the provisions in the operation manual, otherwise it will cause
Fire.
4 if the insulation board is a standard accessory of a certain type of circuit breaker, must install the insulation board.
5 may not install the circuit breaker, in exceptional circumstances such as high temperature, high humidity, large dust, corrosive gas
Body, vibration etc.. Otherwise it will cause a fire or circuit breaker cannotaction.
The 6 circuit breaker protection, ensure that the dust, powder, iron powder orrain may enter the circuit breaker.
Otherwise, the circuit breaker will not act.
Earth leakage circuit breaker []
1 only in the single-phase three wire or three-phase four wire system used inelectric leakage circuit breaker, this time must ensure that the connection of neutral lead
Line and neutral phase. Otherwise, in the break phase or overcurrentcondition, circuit breaker action, thus induced combustion
Disaster.
The 2 is connected with a circuit breaker and the power supply, ensure that the power supply and the circuit breaker ratings to match.
3 if the rated values do not match, the circuit breaker cannot act or damaged.
4 in the open phase state, the neutral wire will lead with the load sideconnected.
If the lead wire are not connected, cannot detect whether the neutral linebroken phase.
5 if the neutral pole has two terminal screws, cross tighten the two screws.Otherwise it will cause screw loosening,
To cause a fire.
Instructions for use:
Automatic shutoff circuit 1 circuit breaker, after clearing the fault rotation handle to connect the circuit. Otherwise it may cause electric shock
Or fire.
Earth leakage circuit breaker []
1 to ensure the electrical equipment grounding terminal.
Otherwise, may cause electric shock or fire.
Each month 2 press the test button to check accuracy of operation are required. If the leakage circuit breaker is not open circuit, show
Failure. The relevant reasons, please consult a professional electrician.
'standard' use of the environment
- use environment temperature...... - 10 DEG C to 40 C
(but the average temperature of 24 hours of not more than 35 DEG C)
Environmental temperature exceeding 40 DEG C when the current lapse rate
50 c............ 0.9 times
60 c............ 0.7 times
- relative humidity............ 85% the following, no condensation
- altitude.................. The following 2000m
- atmosphere............... No excessive water vapor, oil mist, smoke, dust, salt,corrosive substances, vibration, impact.
The measuring device of breaker display
(MDU circuit breaker)
A. Mitsubishi measurements show three characteristics of device of circuit breaker
1 save installation space and human
2 functional improvement, persification
3 to provide the overall cost advantage
With built-in VT, CT and measuring display device Mitsubishi measuring display device circuit breaker, transmission can realize measurement, display and circuit information and only needs a small space and limited installation,wiring workload, and can provide the overall cost advantage.
Mitsubishi measuring display device and circuit breaker is a small, but functional, very suitable for the monitoring and protection circuit andequipment maintenance work. A variety of models for a variety of network, as a kind of energy saving equipment, through the energy management of the fine energy conservation activities in support of customer.
B. simple realization of the measuring and monitoring of circuit, support all kinds of energy saving management.
The breaker can measure and display the load current and the line voltage,electric power, power, harmonic current, leakage current and power factor,achieve energy fine control, energy management support customer.
Characteristic
A. long service life (the life of the mechanical), high reliability
B. improves the rated short-time withstand current
Through with the use of intelligent release (ETR) and MCR (*1), the expansion of the scope of coordination selection.
C. applies to changes in the load, improve the coordination of protection
Through the electronic release system can set release more detailed characteristics. The system uses RMS to detect tolerance distorted wave.
D. improves the intelligent release (ETR) and transmission function
In order to flexibly meet the various needs of customers according to the purpose of use and effective to select the desired function. Measurement function is improved, therefore, the circuit breaker can be applied to CC-Link,PROFIBUS-DP, MODBUS transmission system, which can be combined withMDU circuit breaker, help you establish various circuit measurementmonitoring system and energy saving system.
Insulation distance power supply side
1 Basic Concepts
Insulation distance (distance is shown in the standard)
A. at least to ensure that the circuit breaker to install the equipment insulation distance related provisions in the standard specifications (space distance andthe creepage distance).
Recommend the use of insulating clapboard and insulating tape strengthenelectrical charged body and bare naked among the charged body and the insulation between the abnormal voltage surge, or similar events to avoidmetal sheet loosening and conductive dust, in the circuit caused the accident,improve the reliability of the panel.
B. arc distance (insulation distance)
When the circuit breaker is the exhaust side must have enough arcing distance. When the actual load circuit is open, especially the overload or short circuit, discharge ionization gas from the exhaust hole. The gas can cause the exposed parts and busbar short-circuit between live parts, may also causecharged to install metal panel between the grounding fault.
Therefore, you must ensure that the circuit breaker arc distance exhaust sideenough, strengthen insulation performance in the gas components exposed.In addition, must ensure that the exhaust hole before there is enough space,because when the exhaust is blocked, may cause a short circuit performance degradation.
