Grounding :
Correct grounding of the inverter is an important means to improve the sensitivity of the control system and suppress the noise . The grounding resistance of the grounding terminal E(G) of the inverter is as small as possible. The cross-sectional area of ​​the grounding conductor should be no less than 2mm2 and the length should be controlled within 20m . The grounding of the inverter must be separated from the grounding point of the power equipment and cannot be grounded. The shield of the signal input line should be connected to E(G) , and the other end must not be connected to the ground. Otherwise, the signal will fluctuate and the system will not oscillate. The inverter and the control cabinet should be electrically connected. If the installation is difficult, the copper core wire can be used for bridging.
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Lightning protection :
In the frequency converter, there is generally a lightning absorption network, which mainly prevents instantaneous lightning intrusion and damages the frequency converter. However, in actual work, especially when the power line is introduced overhead, the absorption network of the inverter alone cannot meet the requirements. In areas where lightning is active, this problem is particularly important. If the power supply is overhead, install a special inverter for frequency conversion ( optional ) at the incoming line , or have a special pre-buried steel pipe 20m away from the inverter according to the specifications. Ground protection. If the power supply is a cable entry, the lightning protection system of the control room should be well protected against lightning damage. Practice shows that this method can basically solve the lightning strike problem effectively.NiCad and Ni-MH Battery are two quite different kinds of batteries. Both types have to be dealt with differently from one another in relation to charging and charging competencies and procedures. In general, NiMH batteries cannot handle the high rate of charges or discharges (typically over 1.5-2 amps) that Ni-Cd Battery can.NiMH (Nickel Metal Hydride) batteries are a rechargeable alternative to lithium or alkaline batteries. A NiMH battery usually has 2-3 times the capacity of an equivalent sized nickel-cadmium battery and will last longer in high-performance electronics.NiMH (Nickel Metal Hydride) batteries are a rechargeable alternative to lithium or alkaline batteries. A NiMH battery usually has 2-3 times the capacity of an equivalent sized nickel-cadmium battery and will last longer in high-performance electronics. NiMH batteries are used in conjunction with a smart charger,...NiMH batteries have a wide operating temperature range and typically have a cycle life of about 3000 cycles. Also, they can tolerate overcharge and over discharge conditions, simplifying maintenance requirements. Another advantage to a Nickel Metal Hydride battery is that it's environmentally friendly because a NiMH battery is made without...
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