Schneider RM1-XA315 Single-Pole Magnetic Overcurrent Relay

RM1-XA315 dimensional reference — official code values, schematic views not to scale.

• Confirm the recommended motor-current range of 146–230 A and the required 250–800 A trip setting.
• Observe the 315 A maximum continuous-current rating and the 12 operating-cycles-per-hour limit.
• Use RM1-ZG21 when the specified non-latching 1 C/O contact block accessory is required; it is ordered separately.
• Apply RM1-XA relays to circuits without normal current peaks, including starter and resistor circuits, or to starting-peak control on slip-ring motors.

1. What protection function does RM1-XA315 provide?
It provides instantaneous, non-latching, single-pole magnetic overcurrent protection. The published ranges are 146–230 A for recommended motor current and 250–800 A for trip-current adjustment.

2. What should be checked before selecting this relay?
Confirm the motor current, required trip point and the 315 A maximum continuous-current rating. The selected values must also suit the protected circuit and installation arrangement.

3. Is the contact block included with RM1-XA315?
RM1-XA315 is the non-latching relay version. RM1-ZG21 is the specified non-latching 1 C/O contact-block accessory and is ordered separately.

4. Is RM1-XA315 suitable for frequent operation?
No. Schneider Electric limits RM1-XA relay operation to 12 cycles per hour, so it is not intended for rapidly repeating switching duty.

5. What should be confirmed when replacing an installed unit?
Match the full reference, current ranges, non-latching operation, dimension codes and accessory requirement. No official direct replacement is stated in the manufacturer documentation used for this page.