After the maintenance function of the inverter is caused by the operation of the problem, it will trip immediately, and the fault code will be displayed together, and the tripping alarm indication circuit of the peripheral inverter will send out an audible and visual alarm to remind the operator to clean up the problem in time.
Inverter trip maintenance refers to cutting off the power supply when the inverter operation is abnormal, and maintaining the inverter from being damaged.
The terminals of inverter A, B and C are abnormal output terminals, and between A and C are equivalent to a normally open switch, and between B and C are equivalent to a normally closed switch. The circuit job process is described as follows.
1. Power supply control
Press the button SB1, the contactor KM line is energized, the KM main contact is closed, the power supply is provided to the frequency converter through the KM main point, and the KM normally open shaft auxiliary contact is closed together to determine the KM coil power supply. Press the button SB2, the contactor KM coil loses power, the KM coil loses power, the KM main contact is disconnected, and the power supply of the inverter is cut off.
2. Abnormal trip maintenance
If the inverter is abnormal during operation, A and C will be closed and B and C will be disconnected. The disconnection between B and C makes the contactor KM coil lose power, and the KM main contact is disconnected, cutting off the power supply of the inverter; The closure between A and C energizes the relay KA coil, closes the KA contact, rings HB and the alarm lamp HL is energized, and sends out the abnormal sound and light alarm of the inverter operation.
Press the button SB3, the relay KA coil loses power, the KA normally open contact is disconnected, the HB and HL lose power, and the sound and light alarm is aborted.
|
More on that
|
Schneider inverter has misunderstandings in practical applications
Myth 1: Whether the inverter can complete power saving
The use of inverters can save electricity Some literature claims that inverters are power-saving control products, giving people the impression that only the use of inverters can save electricity. In practice,
The reason why the inverter can save electricity is because it can ...
|
|
How to choose the right inverter for the motor?
The inverter is an electric transmission element that is used in frequency conversion skills and microelectronics skills to control and communicate with the motor by changing the frequency and fluctuation of the power supply of the motor.
The birth of the inverter cabinet originated from the communication motor ...
|
|
Dual-fan inverter selection - Schneider
1. Qualified after inspection
When selecting a double fan inverter, it must be strictly checked for its quality. The first requirement is that it must have relevant certificates of qualified inspection, and some qualified materials must be taken out. This is the only way to ensure that this change ...
|
|
Introduction to Schneider PLC series
1. LMC058 & LMC078 Modicon Motion Controller Product Information
Faster machine planning
The motion controller uses the same programming software as the PLC;
Custom-made utility blocks for complex use;
Dedicated motion function library for programming, debugging, and diagnosis ...
|
|
Instrumentation anti-interference measures - Schneider
The interference encountered by sensors and instruments in the field operation is varied, and the specific situation is analyzed on a case-by-case basis, and the principle of anti-interference is to adopt different methods for different disturbances. This flexible and mobile strategy is undoubtedly opposed to universality, and the way to deal with it is to choose a modular approach, except for ...
|
|
Frequency converter control motor leakage solution - Schneider
Because the current at the input and output ends of the inverter contains high-frequency components, the leakage current formed by the high-frequency components when the inverter is driven is greater than that when the grid power supply is supplied. Because there are many varieties of circuit breakers, in some cases, even the inverter wires and motors ...
|
|
The comprehensive utility of the inverter control circuit - Schneider
(1) The operation circuit compares the external speed, torque and other instructions with the current and voltage signals of the detection circuit to determine the output voltage and frequency of the inverter.
(2) The voltage and current detection circuit are the same as the main loop potential ...
|
|
Schneider appeared at the 5th China Power Distribution Technology Summit Forum
Beijing, China, September 14, 2020 – Today, the 5th China Power Distribution Technology Summit Forum 2021, held by China Electric Power Research Institute Co., Ltd. and the Science and Technology Development Service Center of China Electric Power Council, opened in Beijing. The theme of this forum is "Supporting the Strategic Policy of Carbon Peaking and Carbon Neutrality, Building a ...
|
|
Schneider soft starter fault alarm maintenance method
1. Question-F 05 (frequency error):
This problem is caused by a problem with the soft starter processing the internal power signal, which is causing errors in the power supply frequency. This situation needs to be handled by the company's product development software design engineer. Mainly start the power supply circuit design ...
|
|
Analysis of 10 reasons for frequent tripping of Schneider leakage switches
1. Defective device
If the lead wire of each pile head is not firmly connected and loosened for a long time, it will cause the pile to heat and oxidize, burn out the outer insulation of the wire, and announce sparks and burnt smell, resulting in undervoltage of the line and air switch action.
2. Leakage switch with ...
|
|
The difference between an inverter and a servo drive – Schneider
In terms of frequency converters:
The abbreviated inverter can only regulate the speed of the communication motor, and the open-loop or closed-loop can be determined depending on the control method and the inverter, which is the traditional V/F control method. Now many of the frequency conversion has been set up by mathematical models, which will communicate electricity ...
|
|
Instrumentation mechanical equipment system - Schneider
1. Power system:
The wire and cable products selected in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (fundamentally replaced by plastic power cables), rubber cables, overhead insulated cables), branch cables (replacing part of the busbars), ...
|
|
Schneider inverter and PLC connection problems
When the inverter is used to form an automatic control system for control, in many cases, PLC and inverter are used together, and how to correctly connect the PLC and inverter together has become the key to the success of the system.
1.PLC switch ...
|
|
Schneider Lexium ILA all-in-one AC servo
The Schneider Lexium integrated drive consists of an electric motor and a control circuit that announces the control signal via a fieldbus, pulse/direction interface or I/O interface (for internal motion tasks).
High compactness: motor and control circuits ...
|
|
Schneider ATS48 soft starter issue
1. What type of ATS48 power supply is?
The control power supply of ATS48 selects communication input, and supplies power to the controller, input and output ports through internal power processing;
The control power supply of Q series products is 220V-415V;
Handling of the Y-Series ...
|
|
Schneider circuit breaker maintenance
1. Insist that the air is moist or unclean, and the pipes are not clean, which may have the following consequences:
(1) The wet gas is decomposed into mixed gases such as hydrogen and oxygen under the action of the arc, and the insulation between the fractures after the main contact is broken is destroyed.
|
|
Schneider UPS power supply installation precautions
The quality of UPS power supply devices directly affects the long-term operation of the UPS system in the future, especially the large and medium-sized UPS power supplies, so the large and medium-sized UPS power supplies should be standard in the process of planning to the device.
Generally speaking, UPS power supply ...
|
|
Maintenance of multiple models of Schneider inverters
Schneider inverter our most common problem is that the power is not visible, the series of inverter switching power supply uses a UC2842 chip as a waveform generator, the damage of the chip will lead to the switching power supply can not operate, so that it can not be displayed normally, in addition, the operating power supply of the chip is not ...
|
|
Dynamic phase angle tuning of inverter motors – Schneider
1. The control cabinet, the main engine, and the brake connection line are correct, and the voltage is correct;
2. Safety circuit, door lock circuit is normal, limit switch, speed change switch and close;
3. The connection cable from the encoder to the PG card must be reliable and accurate;
...
|
|
Schneider intermediate relays
Schneider 24VDC intermediate relays are the most common components in control systems. Generally, 2 normally open and 2 normally closed are the most commonly used, but sometimes 4 normally open and 4 normally closed contacts are not enough. Both have different coil and base models.
...
|
|