Siemens 7SR17 Rho Manual page 335

Scheme 2 (Intermediate)
Scheme 2 provides continuous Trip Circuit Supervision of trip coil with the circuit breaker Open or Closed. It does
not provide pre-closing supervision of the connections and links between the tripping contacts and the circuit
breaker and may not therefore be suitable for some circuits which include an isolating link.
Scheme 3 (Comprehensive) – 19V Binary Input Only
Scheme 3 provides full Trip and Close supervision with the circuit breaker Open or Closed.
©2014 Siemens Protection Devices Limited
Figure 4-2: Trip Circuit Supervision Scheme 2 (H6)
Figure 4-3: Trip Circuit Supervision Scheme 3 (H7)
Chapter 7) 7SR17 Rho Applications Guide
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