ABB SACE EMAX E2N/MS Product Description

Overview

ABB SACE EMAX E2N/MS is an E2N frame switch-disconnector from ABB SACE Emax 2 series, MS stands for switch-disconnector version without overcurrent trip unit. The ABB SACE EMAX E2N/MS is designed for load isolation and switching operation, with no built-in protection trip function. This E2N/MS switch-disconnector serves as a reliable ABB SACE Emax E2N switch-disconnector, widely used for isolation, busbar switching and maintenance isolation in low voltage power distribution switchgear of the ABB SACE Emax E2N switch-disconnector.

Features

This ABB SACE EMAX E2N/MS supports fixed type or withdrawable type installation for the ABB SACE Emax E2N switch-disconnector. It is configured as switch disconnector structure, without Ekip trip unit, only for load breaking and electrical isolation. It can be equipped with standard accessories including shunt opening release, shunt closing release, undervoltage release, auxiliary contact blocks and motor charging device. Front panel has contact position indicator and mechanical test function. The ABB SACE EMAX E2N/MS features high short-time withstand current capacity, suitable for long-term carrying rated current under normal distribution conditions. It can be matched with external protection devices to realize system protection scheme of the E2N/MS switch-disconnector.

Specs

The ABB SACE EMAX E2N/MS series: Emax 2 E2N switch-disconnector. Frame: E2N. Version: MS switch-disconnector, no trip unit. Rated operational voltage Ue: up to 690V AC. Rated insulation voltage Ui: 1000V. Rated impulse withstand voltage Uimp: 12kV. Rated uninterrupted current Iu: 800A / 1250A / 1600A / 2000A / 2500A optional. Pole option: 3P / 4P. Mounting: fixed or withdrawable. The ABB SACE EMAX E2N/MS complies with IEC 60947-3 and CE standards as a E2N/MS switch-disconnector.

Principle

ABB SACE EMAX E2N/MS adopts mechanical switching principle. The ABB SACE EMAX E2N/MS relies on manual or motor spring mechanism to realize closing and opening of main contacts. It can cut off normal load current and provide clear isolation gap after opening, to guarantee safe maintenance on downstream equipment. Since there is no electronic trip unit, it cannot automatically trip under overload or short-circuit fault. The matched YO and YC coils support remote electrical opening and closing operation. The isolation switch structure of the ABB SACE Emax E2N switch-disconnector provides reliable visible isolation point for power distribution circuits.

Applications

This ABB SACE EMAX E2N/MS is widely used in industrial main switch rooms, commercial building power distribution systems, data centre power panels and marine low-voltage distribution systems. It is applied for bus tie switch, incoming isolation switch and maintenance isolation switch. It is used for spare replacement and retrofit of legacy ABB Emax 2 switchgear installations. The ABB SACE EMAX E2N/MS delivers dependable load switching and electrical isolation for low voltage power distribution systems as a proven E2N/MS switch-disconnector.