LRD21 relays equivalent, 3-pole thermal overload relays.
described in this document in the form of the text and images are subject to confirmation by Schneider Electric. 06-2009
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LRD01 to LRD35 3-pole thermal overload relays are designed to protect a.c. circuits and motors against overloads, phase failure, long starting times and prolonged stalling of the motor. 1 Adjustment dial Ir. 2 Test button. Operation of the Test butto.
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