Masterclad Medium Voltage Passive Arc-Resistant Switchgear

Square D® Masterclad medium voltage passive arc-resistant (AR) switchgear is designed with utilities and industrial customers in mind who demand the highest quality power distribution equipment available today. This switchgear and all its components meet ANSI/IEEE C37.20.2 and all other applicable ANSI, UL and CSA standards for metal-clad switchgear. The use of Masterclad medium voltage AR switchgear provides an additional degree of protection to personnel working in close proximity, while the equipment is operating.

The design of today's metal-clad switchgear from Schneider Electric is a carefully planned and executed evolution of the highly successful designs manufactured for nearly 30 years. The switchgear provides a multitude of features to simplify and improve application, installation and operation.

Design features

• Voltage ratings from 2.4 kV to 15 kV (1200 A, 2000 A and 3000 A) are available for indoor, 1-high and 2-high (up to 2000 A only) applications. Vacuum circuit breakers (Type VR) are standard with ANSI interrupting ratings up to 50 kA RMS symmetrical.
• For 1200 A and 2000 A, one auxiliary compartment located above the breaker compartment can accommodate either control power transformers (CPTs) or front-mount voltage transformers (VTs).
• Front accessible standard accuracy (up to four sets) or optional high accuracy (up to two sets) window-style current transformers are mounted on 15 kV insulated primary contact bushings in the circuit breaker compartment.
• Positive ANSI interlocks prevent movement of the circuit breaker to either the test or operating positions with the circuit breaker closed.