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The MPU-32 series Motor Protection Unit is used to provide current and temperature-based protection, metering, and data-logging for three-phase, low-voltage, medium-horsepower induction motors. 如果现有电流互感器提供的电机保护已淘汰或老化，可选用此继电器进行改装或升级。 The MPU-32 can be programmed using the front-panel operator interface, the TIA-232 port, or an optional communications network. 要更换常见的过时继电器，请参阅PMA系列面板封装适配器套件。
电机保护装置
Three ac-current inputs
Earth-leakage-CT input
Programmable digital input
24 V dc source for digital input
Programmable 4–20-mA analog output
Onboard temperature-sensor input
100-Ω-Platinum RTD or PTC
Three programmable output relays
Local RS-232 communications, optional network communications
PC-interface software (SE-Comm-RIS)
4 line x 20 character backlit LCD display
Keypad for programming and display selection
4 LEDs; 1 user programmable
Current Input Module (MPU-CIM) The MPU-CIM Current Input Module is the interface between the MPU-32 relay and the 5-A-secondary, 1-A-secondary, and sensitive current transformers. The MPU-CIM is ordered separately from the MPU-32 and can be surface- or DIN-rail mounted. Wire-clamping terminals are standard, but the MPUCTI is available for those requiring ring-tongue terminals.
功能与特色
- 过载
- Dynamic thermal model
- 通信
- Ground fault
- Current unbalance/Phase loss/Phase reverse (current)
- RTD temperature
- Phase loss/Phase reverser (current)
- 过载电流
- 阻塞
- Undercurrent
- PTC overtemperature
- Starts per hour
- Differential