The adoption of intelligent products is more aimed at the pain points, difficulties and inconveniences and waste in the specific use process.
For example, the temperature of the switch cabinet often occurs due to poor contact, aging, etc., which is more common, especially the mid-mounted circuit breaker handcar, because the six contacts rely on a leading screw in the middle to advance, although there are guide rails on both sides, but the gap is larger, the deviation on both sides is inevitable, and due to the closing operation, the deviation on both sides depends on the observation window can not be determined, the position of the handcar S8 S9 will switch as long as the middle reaches the working position, so the deviation of phase A or C will cause poor contact of plum blossom contact, cabinet, The handcar manufacturing and assembly tolerance is large, the gap is more, and the contact bite is generally required to be 20+ -5mm, and the actual bite may only be 20-5-8=7mm for the minimum negative deviation of phase B, and the deviation of phase A and C may only be 3-4mm on one side, and it may cause unilateral contact, so the temperature rise in long-term operation will inevitably exceed the standard.
There are also cable connections, bus connections, etc., which may be due to the torque of the bolt tightening does not meet the requirements, or foreign bodies, deformation leads to poor contact, and the resistance is difficult to measure, and long-term operation will also cause the temperature rise to exceed the standard.
This requires real-time monitoring of temperature rise, early detection of abnormalities, and measures to avoid accidents or accelerated aging of insulation caused by long-term temperature exceedance. The contact passive temperature sensor and wireless transmission can realize high-voltage isolated temperature measurement and remote monitoring.
Schneider Smart MVNEX
Difficulties such as the switch cabinet opening and closing circuit abnormal, may be due to stagnation, insufficient lubrication and other reasons of the circuit breaker operating mechanism abnormal, after the closing of the general will not immediately open the power outage, but this for the future opening operation, fault tripping and other hidden dangers.
The above problems can be solved through intelligent monitoring, through the installation of circuit breaker status monitoring between the power supply and the circuit breaker aviation plug, there is no need to change the mechanism and circuit breaker body design, and the non-intervention method can be used to find the problem and take corresponding measures by measuring the abnormality of voltage and current in the process of opening, closing and energy storage.
The process of shaking in and out of the circuit breaker of the switch cabinet is very dangerous, that is, when the primary contact is not completely isolated from the high-voltage live part, if the conductive body suddenly intervenes in the phase or with the charged body such as the cabinet, it will instantly cause the circuit to be connected and the short circuit accident will occur. The most appearing is the metal valve, due to the file card falling off, suddenly falling or not fully opened, there is the maintenance of the tools left in the compartment, some tools even put on the tentacle arm and so on, at this time for the operator is very terrifying, the switch cabinet to meet the internal combustion arc level, the operation is completely in accordance with the regulations, that is, the door is closed and all the door lock bolts are tightened in place, will not cause burns, but it may also cause ears, eyes and psychological injuries.
The intelligent switch cabinet adopts electric operation for the circuit breaker handcart and grounding switch, that is, the electric shaking in and out, and the electric opening and closing grounding switch. Through remote control, it is of great significance to realize the one-key power outage operation in the control room and protect the safety of power operation and maintenance personnel to the greatest extent.
The electrically operated circuit breaker can achieve stability and reliability, will not cause impact and contact is not in place, and assist in the first distance monitoring, better avoid the aforementioned circuit breaker tilting phenomenon, and prolong the service life of the switchgear.
Finally, the waste of intelligent switchgear is greatly reduced by changing from plan-based maintenance to condition-based maintenance through condition monitoring. There is also the management of equipment energy consumption, the automatic switching of compensation, and the monitoring of power quality to reduce energy consumption. Load control to ensure the rational use of electricity.