Beskrivning
CBS-4 RA / CBS-4 RAL Relay Description
The CBS-4 RA or CBS-4 RAL is a unit equivalent to 4 residual current protection relays, with 4 independent programmable relays available. The device features:
- 4 inputs to connect the external toroidal transformers of the WG / WGS / WGC series.
- Self-reclosing with programmable residual current trip in each channel.
- Superimmunized Type A relay with high-frequency current filtering and high immunity, monitoring in true root mean square (TRMS).
- Reduced size: 3 modules.
The device has 5 independent programmable outputs:
- 4 residual current trip outputs
- 1 end-of-reclosing-sequence interlocking output
It also includes a backlit display to show the information of the 4 channels, including:
- Adjustment values
- Instantaneous leakage current
- Trip/external reset input
Other features include:
- Automatic test of the connection and status of each external transformer.
- Optional RS-485 communications: type CBS-4C RA and CBS-4C RAL.
- Assembly on DIN rail 46277 (EN-50022).
- Optional assembly on a 72 x 72 panel with accessory M5ZZF1.
Applications
The CBS-4 RA or CBS-4 RAL relays enable intelligent residual current protection in a compact design. With one contactor per channel, they allow automatic reclosure after a trip, making them ideal for:
- Public lighting
- Cash machines (ATMs)
- Refrigeration chambers
- Traffic lights
In addition, the version with RS-485 communications (CBS-4 C) can be used with the Power Studio software for centralized real-time supervision, along with a record log that can be analyzed later.
