Functional diagrams for disturbance recorder and trip circuit supervision - Arc protection - Merging unit - Motor protection - Application Manual - REM620 Motor Protection and Control - 2.0 FP1 IEC - IEC - 01.06.2023
All START and OPERATE outputs from the protection stages are routed to trigger the disturbance recorder or, alternatively, only to be recorded by the disturbance recorder depending on the parameter settings. Additionally, some selected signals from different functions and five binary inputs totally from X105 and X115 are also connected.
The manual trigger signal from push button is used to trigger disturbance recorder manually as needed.
Figure 2. Circuit supervision
One trip circuit supervision function is used by default, TCSSCBR1 for X100-PO3. Both functions are blocked by the Master Trip TRPPTRC1 and the circuit breaker open signal. The ALARM output indication is connected to the LED 9.
Note: It is assumed that there is no external resistor in the circuit breaker tripping coil circuit connected parallel with circuit breaker normally open auxiliary contact.
Failures in current measuring circuits are detected by CCSPVC1. When a failure is detected, blocking signal is activated in current protection functions that are measuring calculated sequence component currents, and unnecessary operation can be avoided. The alarm signal is also connected to the alarm LED 9.
The fuse failure supervision SEQSPVC1 detects failures in voltage measurement circuits. Failures, such as an open miniature circuit breaker, are detected and the alarm is also connected to the alarm LED 9.