Innovative Self Power Protection Relay for RMUs : CSDPR-V2-200

FEATURES
  • Relay get energize either from Current, Aux. voltage, front USB or internal battery.
  • DEFT & Inverse characteristics for Over current & Earth fault, individually selected for phase & earth fault
  • Potential pulse output for direct triggering of the circuit breaker coil. Potential-free alarm contacts are also available
  • Self-supervision function
  • Remote trip & Remote protection block input DI
  • Two sets of setting groups
  • DI/DO programmable matrix
  • Protection blocking through DI
  • Wide operating ranges of Aux. supply voltage (AC/DC)
  • Last 5 Fault and 10 Event records with Date & Time stamp
  • Rear RS-485 communication
  • Front USB communication for PC / Laptop interface

C&S Electric CSDPR-V2-200 is a self-powered, numeric over-current protection relay for Ring Main Units (RMUs) and feeder protection. Current, auxiliary voltage, USB, or an internal battery can power the device. The unit offers multiple protection functions, including overcurrent, short-circuit, and earth fault protection, as well as inverse and definite-time characteristics.

  • Relay draws its operating energy directly from the current transformers (CTs) in the protected circuit, ensuring continuous operation even during a main power outage or auxiliary supply failure.
  • It can also be energised from an auxiliary voltage supply (AC/DC), an internal battery, or a front USB port (for configuration), providing flexibility during commissioning and maintenance.
  • The device is designed to store enough energy to trip the circuit breaker even with low current faults
  • It integrates various protections in a single compact unit, including:
    • Over current
    • Short circuit
    • Earth fault
    • Earth fault High set
    • Under current
    • Cold load pickup
    • Inrush blocking
    • Unbalance / Asymmetric
    • Circuit breaker failure
    • Trip circuit supervision
  • The relay stores the last several fault and event records with a date and time stamp.
  • Its small and compact design facilitates integration into Ring Main Units and other space-constrained switchboards.
  • Features an RS-485 Modbus communication port (rear) and a front USB port for PC/laptop interfacing, enabling remote monitoring, control, and easy configuration using software like CSE LIVELINK.
  • An LCD display and push buttons allow for easy viewing of measured parameters, fault data, and setting adjustments.