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Siemens 3WL9111-1AT21-0AA0 ZSI Module for 3WL Circuit Breakers

Siemens 3WL9111-1AT21-0AA0 NAFTA ZSI module for 3WL circuit breakers.

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ManufacturerSiemens

Part number3WL9111-1AT21-0AA0

Type ZSI Module (WLZSIMD)

Region NAFTA

Series 3WL

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Provides Zero Sequence Indicator function NAFTA compliant accessory For Siemens 3WL circuit breakers Enhances fault detection

Product description

The Siemens 3WL9111-1AT21-0AA0 is a ZSI (Zero Sequence Indicator) module, specifically a WLZSIMD accessory designed for the 3WL circuit breaker series in NAFTA regions. This module is crucial for providing zero sequence fault detection capabilities, enhancing the safety and protection of electrical systems.

This ZSI module is typically used in industrial and commercial power distribution applications where sensitive fault detection is required. It integrates with the 3WL circuit breaker's electronic trip unit to provide advanced protection against ground faults and other unbalanced load conditions.

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Technical specifications

Type	ZSI Module (WLZSIMD)
Region	NAFTA
Series	3WL

Common applications

Industrial power distribution

Commercial electrical systems

Ground fault protection

Safety interlocking systems

Compatible systems

Siemens 3WL circuit breakers (NAFTA region)

Also known as

Siemens 3WL ZSI module WLZSIMD module Siemens NAFTA accessory 3WL9111-1AT21-0AA0

Technical note

Expert tip

Requires proper integration with the 3WL circuit breaker's ETU for full functionality. Consult the manual for wiring diagrams.

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Frequently asked questions

What does the Siemens 3WL9111-1AT21-0AA0 ZSI module do?

The Siemens 3WL9111-1AT21-0AA0 is a ZSI (Zero Sequence Indicator) module for the 3WL circuit breaker. It is designed to detect zero sequence currents, which are indicative of ground faults, thereby enhancing the protective capabilities of the circuit breaker against such abnormal conditions.