The primary and secondary ends of the primary winding of the current transformers are denoted by L1 and L2 respectively (L2 is not marked); the head end of the secondary winding is marked with K1 and K2 (or S1, S2), respectively. L1 and KI (S1) are the same polarity; L2 and K2 (S2) are the same polarity.
(1) One-time series of current transformers of current transformers manufacturers In the circuit under test, the terminals labeled L1 should be connected with the power supply. The terminals marked with L2 should be connected with the load (electrical).
For the core-type transformer, the power cord should be marked with one end of the L1 wear, through the load after the load. Power line through the transformer center hole several times, that is, a few turns, as shown in Figure 1.
(2) current meter or power meter current loop and the current transformer secondary K1 (S1), K2 (S2) phase. When connected to the current circuit of the power meter, the K1 (S1) terminal should be connected to the end of the power meter "*" (the end is referred to as the "generator side").
(3) marked with secondary K2 (S2) terminals and cores should be reliably grounded.
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