ABB SPACOM replaces REX615

Common problems and troubleshooting suggestions

Based on actual renovation experience, the following issues are relatively common:

9.1 The cutting tool cannot cut the panel

Check if the battery is fully charged; Confirm that the panel thickness does not exceed 3.0mm; check if the punch and die are worn, and replace the cutting head (2RCA031786) if necessary.

9.2 Difficulty in plugging and unplugging modified connectors

Ensure that the connector is aligned with the corresponding interface on the back of the relay, and use the M3 × 8mm screws (T10) provided in the kit to secure the connector. Do not use strong force to avoid damaging the pins.

9.3 Some pre configured functions do not match the original SPACOM

Due to the special customization logic of certain SPACOM models, standard pre configurations may not fully match. At this point, ABB configuration support services should be contacted to provide the complete order and logic diagram of the original relay, and generate customized configurations.

9.4 Communication cannot be established

Check the IP address settings of REX615 (default values need to be consulted in the manual); Confirm the use of the correct communication protocol (GOOSE and MMS need to be configured for IEC 61850); For serial protocols, check if the pin definitions match the serial converter of PCM600.

9.5 Relay alarm "CT circuit disconnection"

Usually it is because the CT secondary wire becomes loose or the polarity is reversed during the rewiring process. Check if the CT wire on the X120 terminal is secure, and use a clamp gauge to measure if the CT circuit current is balanced.