SIEMENS Monitoring Relay 3UG4511-AP20, 3UG4512-1BR20, and 3UG4615-1CR20:
1. 3UG4511-1AP20：Function and purpose: This is a Siemens analog monitoring relay, mainly used to monitor under voltage or over voltage of single-phase lines or battery power supply. It can be powered by a separate auxiliary voltage or self powered. For devices powered internally, no auxiliary power supply is required, and measurement signals do not need to be loaded by externally powered devices.
• Parameter characteristics: Its protection feature is IP20, and the contact switching current and switching voltage are usually 24V. The rated current and rated voltage also have corresponding specification requirements. The measurement range is wide, and the deviation can be minimized. The delay time and reset function parameters can be set arbitrarily, and the actual voltage value and fault type can also be displayed.2. 3UG4512-1BR20：• Functional purpose: It belongs to analog monitoring relays, mainly used for monitoring phase faults and phase sequence. Can be applied to power systems with 3x160-690V ac, 50-60Hz, connected through plug terminals.
• Parameter characteristics: It has bidirectional electric shock and a protection level of IP20. It can play a monitoring and protection role in electrical systems in industrial automation, power systems, and other fields.3. 3UG4615-1CR20：Function and purpose: It is a digital monitoring relay of Siemens 3UG series, suitable for monitoring 3-phase power supply voltage. It can monitor the phase sequence, phase failure, undervoltage, and overvoltage of a 3-phase power supply.
• Parameter characteristics: The country of origin is Germany, and the product lifecycle is in the effective product stage. Its bolt type terminal connection has a net weight of 0.146kg and a packaging size of 29.00x99.00x107.00 (unit: mm). It has a certain range of overvoltage and undervoltage hysteresis settings, which can be adjusted according to actual needs.
Using the new generation SIRIUS product, all components can be easily combined
The new generation SIRIUS (imported) products have undergone comprehensive reforms in response to current market demands and future development trends: space saving, fast wiring, simplified models, and convenient installation. In addition, comprehensive and continuous monitoring can be conveniently achieved, and communication with automation systems can be facilitated through AS-i network and I0-link interface. Comprehensive product data files such as CAx can also be provided to simplify system design.
