Price of rack-mounted relay protection devices

Rack-mounted relay protection devices typically range from $500 to $5,000 per unit, depending on features, size, and manufacturer. OverviewRack-mounted relay protection devices are used in high-voltage substations, industrial control panels, and switchboards to provide protection, monitoring, and control functions. Common types include: Modular relay racks like the saTECH MS system, available in 4U, 5U, and 6U sizes, designed for substation-grade relays and test blocks.

M Series modular relay cases, which meet international standards for 19-inch rack mounting and include optional CT shorting switches, blanking plates, and frames.

I/

O relay module racks, which interface multiple relay modules with field wiring for industrial automation and protection systems.

Rack-mount I/

O modules such as the SEL-2506, which expand digital inputs and outputs for protective relays and support fiber-optic communications.

Price Range

Basic modular relay racks (empty or with standard test blocks) generally start around $500–$1,500. Fully equipped protection relay racks with substation-grade relays, I/O modules, and fiber-optic communication capabilities can range from $2,000 to $5,000 or more, depending on the number of relays, I/O channels, and additional features. Specialized or custom configurations with advanced monitoring, labeling, or environmental protection may exceed $5,000 per rack.

Factors Affecting Price

Rack size and modularity – Larger racks (5U–6U) and modular systems with flexible configurations cost more. Relay type and brand – Substation-grade relays from manufacturers like SEL or Morssmitt are more expensive than standard industrial relays. Additional features – Fiber-optic communication, CT shorting switches, blanking plates, and environmental protection (IP ratings) increase cost.

Supplier and region – Prices vary by distributor, shipping, and local import duties. For accurate pricing, it is recommended to contact suppliers directly such as Arteche, Morssmitt, SEL, or distributors like DigiKey, as they can provide quotes based on the exact configuration and quantity required.