Siemens 3ZX1012-ORH11-1AA1 Motor Protection Relay

Siemens 3ZX1012-ORH11-1AA1 Motor Protection Relay is a Siemens protection device identified by the model 3ZX1012-ORH11-1AA1. The product entry lists an accompanying auxiliary contact block, 3RH1911-2FA31, indicating that the relay and the contact block are paired for motor control applications. The 3RH1911-2FA31 auxiliary block provides three normally open and one normally closed auxiliary contacts to support signaling and interlocking in control circuits. In industrial panel installations, this combination is used to extend the protection relay's functionality by offering dedicated signaling paths for indicators or interlocks while the relay handles the motor protection logic. This pairing aligns with Siemens' modular approach to motor protection, enabling straightforward wiring and integration into existing control architectures by supplying both protection and signaling interfaces in a compact package. Designed for installation in electrical panels, it supports integrated protection schemes where motor protection, signaling, and interlocking are needed in a compact footprint for reliable, compact, cost-effective installations.