Ningbo Macwey Industrial Technology Co.,Ltd
| Payment Terms | T/T |
| Supply Ability | 10000 piece |
| Delivery Time | 15 days |
| Packaging Details | wooden case |
| Name | 800A Vacuum Contactor |
| Main Loop Configuration | 3-pole design |
| Control Power Supply | 110V, 120V, 220V, 380V at 50Hz/60Hz |
| Control Loop | DC electromagnet with AC control via power module |
| Rated Duty | Discontinuous long-time duty and repeated short-time duty |
| Auxiliary Contact | Three normally open and two normally closed contacts, 5A heating current |
| Brand Name | MacweyTEK |
| Model Number | MKKG5-7.2 |
| Certification | ISO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 10000 piece |
| Delivery Time | 15 days | Packaging Details | wooden case |
| Name | 800A Vacuum Contactor | Main Loop Configuration | 3-pole design |
| Control Power Supply | 110V, 120V, 220V, 380V at 50Hz/60Hz | Control Loop | DC electromagnet with AC control via power module |
| Rated Duty | Discontinuous long-time duty and repeated short-time duty | Auxiliary Contact | Three normally open and two normally closed contacts, 5A heating current |
| Brand Name | MacweyTEK | Model Number | MKKG5-7.2 |
| Certification | ISO9001 | Place of Origin | China |
| High Light | 7.2kV 800A Vacuum Contactor ，800A Vacuum Contactor Corrosion Resistant ，7.2kV AC Motor Contactor | ||
1. Overview
1.1 MKKG5-7.2 AC vacuum contactors (hereinafter referred to as: contactor) are applied in power network with AC frequency of 50Hz-60Hz, rated voltage of 7.2kV, and rated current below 800A in the main loop for the remote making and breaking, frequent start and control of AC motor. It is advisable to use them in combination with fuse and protective device to replace vacuum circuit breaker.
2. Ambient Conditions for Use
2.1 Ambient air temperature is neither higher than +40℃ nor lower than -10℃;
2.2 Altitude of installation site does not exceed 1000m;
2.3 The maximum mean monthly relative air humidity is 90% in the wettest month. The minimum mean monthly temperature is 25℃, with consideration of condensation generated on the surface of product due to temperature change.
2.4 The operating condition shall be free from obvious impact and vibration;
2.5 The medium is without explosion danger, and in the medium there is no gas and dust (including conductive dust) sufficient for corroding metal and destroying insulator.
2.6 The operating condition shall be free from rain and snow.
3. Model No. & Specification
3.1 Composition of model No. and meanings:
3.2 For product specifications, rated voltages are 7.2kV, the rated current is below
800A. Control voltages include 110V,120V,220V, 380V.
4. Structure and Operating Principle
4.1 The contactor consists of base frame, electromagnetic mechanism and vacuum interrupter. Electromagnetic mechanism switches vacuum switch tube via armature, connecting lever and draw bar. Magnet coil is powered on when connected to control power supply. Armature drives connecting lever rotate when closing, causing the moving contact and fixed contact in vacuum interrupter to close up, and the break spring is compressed with energy stored. After closure of moving contact and fixed contact, auxiliary switch connects holding winding in series in the starting winding loop, to throttle the coil and keep magnet closed. If control power supply is disconnected, electromagnetic mechanism is powered off, and break spring is released to separate main contact and main loop breaks.
4.2 Vacuum interrupter is composed of upper cover, lower cover, metal bellows and ceramic tube. Its enclosure adopts corrugated porcelain tube made up of 95 ceramic. The porcelain tube features long creepage distance, high mechanical strength, heat resistance, impact resistance, etc. A pair of moving contact and fixed contact is sealed in vacuum interrupter. Contact material is Cu - W - Wc, which is of ablative resistance and low diversion closure value. In this way, if the interruption conditions are met, overvoltage caused by cut-off can be reduced in the interruption, so that service life of electric contact can be lengthened.
Metal bellows drive moving contact to switch on and off while axially moving.
4.3 Considering advantages such as good coordination between actual attractive force and spring force characteristics, low-noise and energy saving, DC double coil, made up of starting winding and holding winding, is used for electromagnetic system, which is switched via auxiliary switch. In order to facilitate users to operate AC power supply, contactor is equipped with bridge rectifier.
4.4 Mechanical padlock can be selected. When closing coil is charged, contactor is closed and mechanical padlock is locked. When trip coil is charged, mechanical padlock is tripped, and contactor is released. In thermal state, if voltage of trip coil is within 85% -110% of its rated voltage, contactor can be reliably released.
5. Main Technical Parameters
5.1 Overall and installation dimensions;
5.2 See Table 1 for main technical features;
5.3 Number of pole of main loop is 3;
5.4 Control power supply: 110V,120V,220V, 380V and 50Hz/60Hz, and also customized according to user needs;
5.5 Control loop is DC electromagnet. Coils are connected with AC control power supply via power module. Schematic diagram and wiring diagram;
5.6 Rated duty: discontinuous long-time duty and repeated short-time duty (rated on-load factor is 40%);
5.7 The auxiliary contact is three normally open and normally closed two, vheating current is 5A
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Year Established:
2013
Total Annual:
$31000000-$35000000
Employee Number:
>218
Ecer Certification：
Verified Supplier
Ningbo Macwey Industrial Technology Co., Ltd. is a manufacturer specializes in R&D ,manufacturing and sales of MV&HV switching equipment and electrical accessories,which applied in voltage range from 10kV to 40.5kV, widely used in power transmission and distribution.The company is lo... Ningbo Macwey Industrial Technology Co., Ltd. is a manufacturer specializes in R&D ,manufacturing and sales of MV&HV switching equipment and electrical accessories,which applied in voltage range from 10kV to 40.5kV, widely used in power transmission and distribution.The company is lo...
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