免责声明
Littelfuse产品并非为以下用途而设计,也不应被用于这些用途:包括但不限于汽车、航空航天、医疗、救生、维生、核设施、高可靠性应用、用于手术植入体内的装置,或者在产品故障或运行无法达到理想状态的情况下会造成人身伤害、死亡或财产损失的任何其他应用。除非在适用的Littelfuse产品文档中已有明确说明。 如果将产品用于相关Littelfuse文件中未明确说明的任何其他用途,则产品不享受Littelfuse质保。 如果将产品用于相关Littelfuse文件中未明确说明的其他用途,则Littelfuse不会为因此造成的任何索赔或损失承担责任。 除非经Littelfuse另行许可,否则Littelfuse产品的销售和使用应遵守Littelfuse销售条款与条件。 "Littelfuse"包括Littelfuse, Inc.及其所有附属实体。
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