Provides independent magnetic overcurrent detection for an AC or DC power circuit and transfers the trip indication through its auxiliary contact.
- Signal or energy path: Circuit current energizes the magnetic sensing mechanism; when the configured threshold is exceeded, the relay changes contact state for the external control or trip circuit.
- Companion components: Use with the correctly rated conductor path, contactor or breaker control circuit, enclosure and terminal hardware documented for the feeder.
- Engineering check: Confirm conductor routing, current-setting method, coordination with upstream protection and reset or test procedure before service.
- System boundary: The relay supplies an overcurrent trip indication and does not replace coordinated feeder isolation or short-circuit protection.
Motor feeders and industrial power circuits requiring adjustable high-current magnetic protection.
Important Notice: Verify the complete RM1XA315 nameplate, installed-system documentation, companion hardware and current Schneider Electric instructions before installation or replacement.
Apter Power RM1XA315 Manuals and Guides
Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.
Starter-circuit peak protection
Instantaneously detects an abnormal current peak in a starter circuit that is not normally subject to current peaks.
Resistor-circuit overcurrent supervision
Protects a resistor circuit where the normal process does not include repeated current peaks.
Slip-ring motor starting-peak control
Supervises the current peak during starting of a slip-ring motor within the cataloged range.
Contactor trip and fault indication
Uses the RM1ZG21 changeover contact in the Schneider 2-wire or 3-wire control schemes to drop a contactor and, where engineered, signal a trip.
Read and follow the current Schneider Electric documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1
Read the complete physical reference: RM1XA315 is non-latching, while RM1XA3151 is the latching/manual-reset version.
2
Do not use the 250...800 A trip-setting range as the motor continuous-current range; Schneider separately specifies 146...230 A recommended motor In and 315 A maximum continuous current.
3
Use the relay only in a circuit whose normal behavior matches Schneider's stated application; repeated normal current peaks can cause unwanted instantaneous trips.
4
Do not exceed 12 operating cycles per hour, and do not describe this relay as suitable for frequent cycling.
5
Order and verify the correct RM1ZG21 non-latching 1 C/O contact block; do not fit latching/reset accessories by reference similarity alone.
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