What are VAMP POC signals?
Issue
User wants to understand what POC signals are in VAMP protection relays.
Product
VAMP Protection Relays
Environment
Line differential protection and communication schemes
Cause
The term “POC signals” may not be clearly defined in standard relay documentation, leading to confusion about their function and application within protection schemes.
Resolution
POC signals are communication signals associated with ANSI 85 (pilot communication) used in line differential protection schemes.
- These signals are exchanged between relays to support differential protection operation
- They are part of the communication process required for accurate fault detection and coordination between line ends
- POC signals are implemented in the following VAMP relays:
- V59
- V259
- V300F
Understanding POC signals is important for configuring and troubleshooting line differential protection systems that rely on communication-assisted protection functions.