KYORITSU 2413F - Manual (Page 15)

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Note ：When measuring large current, observe the time limit specified in
section 3, Specifications. Otherwise, the transformers jaws may
overheat, resulting in damage to the instrument.
Fig.3 Normal AC Current
Measurements
F ig.4 Earth Leakage Current
Measurements
Single-Phase 2-wire system
(in 3-wire system with neutral
clamp onto all 3 wire)
3-phase 3-wire system.
(in 4-wire system with neutral
clamp onto all 4 wire)
Fig.5 Measurements out of balance Leakage