39
Fig.37 Connection diagram Fig.38 Mounting of CT and wiring
5-2-4 Connection When Single-Phase or DC Motor is Applied
When using the thermal overload relay to a single-phase motor or DC motor connection should be made as shown
below in order to maintain the operating performance of the thermal overload relay.
(1) In case of 2-element thermal overload relay: (TR12B-lE)
Fig. 39
(2) In case of 3-element thermal overload relay
Connect wires so that a current flows to 3 heaters.
Fig. 40
･ Wrong connection
Fig. 41 Wrong connection
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