One Stop Solution for Three Phase Electric Meter
We’ve explained to you the basic knowledge of open core current transformers, the definition and classification of latching relays, and so on. In addition, many friends are very interested in the latching relays IM1201T in three-phase electricity meter recently. So today let’s stop your worries on 3p meter design.
Three-phase electric energy meters generally adopt magnetic latching relays -A bistable relay , which use permanent magnets or iron cores with high remanence characteristics to enable the armature of the electromagnetic relay to remain at the position where the coil is energized even after the coil is de-energized. Different from the on-off design of single-phase meters, you need to pay attention to the number of relay contact groups at this time. For 3-phase meters, you can usually combine 3 pcs of single phase relays or 1 pcs of 3 phases relay (also named 3 poles relay, 3p relay).
In this case Ivy has at least two classic options for customers to choose.
Solution 1 is 3 phase latching relay for example, IM1201T and IMT150, both of them can bear high current 120A/150A, at the same time they can control 3 circuits together. They are wonderful choice for your 120A three phase four wires energy meter (Switching cabinet prefer this one as well) However what if you only need 90A 100A? What if you want to integrate ct and shunt inside? We have to introduce solution 2.
Solution 2 is that three pieces of single-phase latching relays are applied to the three-phase meter, that’s 3-in-1 relays. Whats more it can be realized 100% customized to meet customer needs, 500mT magnetic immunity function, compact size, low cost and so on. The relay inside can be 32A to 200A which means you can choose freely, CT inside can be 60A to 140A with different functions such as DC immunity or Non-DC immunity, cosφ =0.5 etc, not mention the shunt, terminal block etc... With this design you only need to consider the core function, we will consider the cost, siz and certification.
In addition, Ivy can offer various of customized assembly. If you have this demand, please click https://www.ivy-metering.com to contact our professional salesman for you to buy.
