P&B Protection Relays, part of the PBSI Group, has introduced a new range of protection relays aimed at delivering sophisticated control at a low price. The MPR3000, MPC3000 and Vision3000 are the new models replacing the MPR2000 and MPC2000(D) relays. The new relays deploy technology from P&B Relays’ Vision range to provide protection relays for both low and medium voltage switchgear.
The new design includes a graphical LCD display which provides a clear menu structure with a display that charts and records the energising current during a motor start. The 3000 range is directly pin for pin compatible with the previous 2000 relay hardware, so direct replacement is economic and immediate. The existing lid mounted reset pushbutton will align with the new relay and act as a metered data scroll prompt.
Using the technology from the Vision relays means the new 3000 shares design characteristics and benefits from the same production and testing processes. This allows the user to instantly inherit all of the new features of a modern P&B relay. One of the core design features is a modular PCB layout that lends itself to the shortened withdrawable case format as well as improving future serviceability of the relay.
To simplify the variety of device options, the 3000 RTD inputs have been fixed as standard to five inputs. The digital inputs are wide ranging and auto-sensing. The PSU can either be ranged for operation at 80-265V AC or DC or an LV type can be fitted for voltages between 18-65V AC/DC. As with the 2000, the secondary CT connection rating should be specified as either 1A or 5A.
The 3000 relay hardware consists of four programmable output relays with changeover contacts, five fixed digital inputs (on the MPR3000) or 19 fixed digital inputs (on the MPC3000 and Vision3000), five pushbuttons to navigate the menu driven LCD screen, nine colour LEDs for indication and status, a front mounted RS232 port and a rear mounted RS485 port for Modbus RTU or P&B Protocol.
