Siemens 3VA9978-0BL Series

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A5E03472775062-04 Last Update: 10 October 2016

3ZW1012-1VA00-7AA0

Spannungsauslöser flexibel, STF / Spannungsauslöser links, STL

Shunt trip flexible, STF / Shunt Trip Left , STL

Déclencheur voltmétrique flexible, STF / déclencheur voltmétrique gauche, STL

Disparador de apertura flexible, STF/Disparador de apertura izq., STL

Bobina a lancio di corrente flessibile, STF / Bobina a lancio di corrente a sinistra, STL

Disparador de tensão flexível, STF / disparador de tensão esquerdo, STL

Şönt kesici esnek, STF / şönt kesici sol, STL

Расцепитель напряжения, гибкий монт., STF / Расцепитель напряжения, монт.

слева, STL

Elastyczny wyzwalacz napięciowy, STF / wyzwalacz napięciowy po lewej, STL

灵活的分励脱扣器，STF / 左侧分励脱扣器，STL

3VA9978 - 0BL..

3VA9978 - 0BA..

Operating Instructions Betriebsanleitung Notice d'utilisation Instructivo Istruzioni operative

Instruções de Serviço İşletme kılavuzu Руководство по эксплуатации Instrukcja obsługi 使用说明

DANGER

Hazardous voltage. Will cause death or serious injury. Turn off and

lock out all power supplying this device before working on this device.

Replace all covers before power supplying this device is turned on.

NOTICE

Installation and maintenance must be carried out by qualified

personnel.

GEFAHR

DANGER

Gefährliche Spannung. Lebensgefahr oder schwere Verletzungsge-

fahr. Bevor Arbeiten am Gerät durchgeführt werden, müssen alle Strom-

quellen ausgeschaltet und mit einer Einschaltsicherung versehen

werden. Vor dem Wiedereinschalten der Stromquellen müssen alle

Abdeckungen wieder angebracht werden.

Tension électrique dangereuse. Danger de mort ou risque de bles-

sures graves. Avant d'intervenir sur l'appareil, couper toutes les sources

de tension et les consigner contre la refermeture. Remettre en place tous

les couvercles avant de remettre l’appareil sous tension.

HINWEIS NOTIFICATION

Installations- und Wartungsarbeiten sind von qualifiziertem Per-

sonal durchzuführen.

L'installation et la maintenance doivent être effectuées unique-

ment par des personnes qualifiées.

PELIGRO

PERICOLO

Tensión peligrosa. Puede causar la muerte o lesiones graves.

Antes de trabajar en este dispositivo, desconecte y bloquee todas las

fuentes que lo alimentan eléctricamente. Recoloque todas las cubiertas

antes de volver a conectar la alimentación eléctrica para este dispositivo.

Tensione pericolosa. Può causare la morte o lesioni gravi. Prima di

lavorare su questa apparecchiatura, disinserire tutte le fonti di alimenta-

zione elettrica dell'apparecchiatura ed assicurarle contro la reinserzione.

Riapplicare tutte le coperture prima di reinserire l'alimentazione di questa

apparecchiatura.

NOTA NOTA

La instalación y el mantenimiento deben corre a cargo de perso-

nal cualificado.

L'installazione e la manutenzione devono essere eseguite da per-

sonale qualificato.

PERIGO

TEHLİKE

Tensão perigosa. Perigo de morte ou ferimentos graves. Desligue e

bloqueie todas as fontes de alimentação antes de executar quaisquer tra-

balhos no aparelho. Volte a colocar todas as coberturas antes de voltar a

ligar as fontes de alimentação.

Tehlikeli gerilim. Ölüm tehlikesi veya ağır yaralanma tehlikesi mev-

cuttur. Cihazda çalışmalar yapılmadan önce, tüm güç kaynakları kapatıl-

malı ve bir açma emniyetiyle donatılmalıdır. Güç kaynakları tekrar

açılmadan önce tüm kapaklar yerlerine takılmalıdır.

ATENÇÃO NOT

A instalação e manutenção têm de ser efetuadas por pessoal

qualificado.

Montaj ve bakım işlemleri kalifiye personel tarafından yapıl-

malıdır.

РУ

ОПАСНО

РL

ZAGROŻENIE

Опасное напряжение. Опасность для жизни или телесных

повреждений. До начала работы выключите и заблокируйте все

источники питания этого устройства. Перед включением питания

снова установите все крышки.

Niebezpieczne napięcie. Niebezpieczeństwo poważnych obrażeń lub

utraty życia. Wyłączyć i zablokować wszystkie źródła zasilania urządzenia

przed rozpoczęciem pracy na urządzeniu. Założyć wszystkie osłony przed

podłączeniem urządzenia do źródła zasilania.

ПРИМЕЧАНИЕ UWAGA

Установка и техническое обслуживание должны

производиться квалифицированным персоналом.

Instalacja i konserwacja muszą być wykonywane przez wykwali-

fikowany personel.

Technical Support: Internet: http://www.siemens.com/lowvoltage/technical-support

Need help?

Do you have a question about the Siemens 3VA9978-0BL Series and is the answer not in the manual?

This document describes the installation, operation, and maintenance of flexible shunt trips (STF) and shunt trips left (STL) for Siemens 3VA molded case circuit breakers. These devices are designed to provide remote tripping functionality, enhancing the safety and control of electrical systems.

Function Description:

The flexible shunt trip (STF) and shunt trip left (STL) are voltage-dependent tripping devices that, when energized, cause the associated circuit breaker to trip. This allows for remote shutdown of the circuit breaker, which is crucial for emergency stops, safety interlocks, or automated control systems. The "flexible" designation suggests adaptability in mounting or application, while "left" indicates a specific mounting orientation within the circuit breaker.

These devices are available in various voltage ratings, supporting both AC (50/60 Hz) and DC power supplies. This versatility ensures compatibility with a wide range of electrical installations globally. The tripping mechanism is activated by applying the specified voltage to the shunt trip terminals (C1 and C2). Upon activation, the shunt trip mechanically acts on the circuit breaker's tripping mechanism, causing it to open the circuit.

Important Technical Specifications:

The document provides a comprehensive list of part numbers for both STF and STL devices, along with their corresponding voltage ratings:

STL (Shunt Trip Left):

3VA9978-OBL10: 12 V DC
3VA9978-OBL30: 24 V AC (50/60 Hz) / 24...30 V DC
3VA9978-OBL31: 48...60 V AC (50/60 Hz) / 48...60 V DC
3VA9978-OBL32: 110...127 V AC (50/60 Hz) / 110...127 V DC
3VA9978-OBL33: 208...277 V AC (50/60 Hz) / 220...250 V DC
3VA9978-OBL20: 380...600 V AC (50/60 Hz)

STF (Flexible Shunt Trip):

3VA9978-OBA20: 24 V AC (50/60 Hz)
3VA9978-OBA21: 48...60 V AC (50/60 Hz)
3VA9978-OBA22: 110...127 V AC (50/60 Hz)
3VA9978-OBA23: 208...277 V AC (50/60 Hz)
3VA9978-OBA24: 380...500 V AC (50/60 Hz)
3VA9978-OBA25: 600 V AC (50/60 Hz)

Wiring Specifications:

Wire Gauge: AWG 20-16 (0.5-1.5 mm²) or AWG 20-18 (0.5-1.0 mm²)
Torque: 4.0 +/- 0.4 lb-in (0.45 +/- 0.05 Nm) for terminal screws. An additional torque specification of 6.2 +/- 0.9 lb-in (0.7 +/- 0.1 Nm) is provided for a different screw, likely for securing the shunt trip module itself.
Strip Length: 0.4 inches (10 mm)

Usage Features:

Safety First: The manual repeatedly emphasizes the critical importance of safety. All installations, maintenance, and troubleshooting must be performed by qualified personnel. Before any work on the device, all power sources must be turned off and locked out to prevent accidental re-energization. All covers must be replaced before restoring power. This is a paramount safety feature for preventing electric shock and serious injury or death.
Easy Integration: The shunt trips are designed for straightforward integration into Siemens 3VA molded case circuit breakers. The diagrams illustrate the step-by-step assembly process, including opening the circuit breaker cover, inserting the shunt trip module, wiring it, and securing it with screws.
Mounting Flexibility: The document shows various mounting locations within different 3VA circuit breaker frames (3VA4, 3VA5, 3VA6), indicating adaptability to different breaker sizes and configurations. The "flexible" aspect likely refers to this ability to be installed in multiple positions or orientations depending on the specific breaker model.
Visual Status Indicator: The test procedure includes checking the "U = 0%" (tripped) and "U = 100%" (ready) states, suggesting a visual indicator on the device or the circuit breaker itself to confirm its operational status. The "OK" indicator after testing further confirms proper functionality.
Remote Tripping: The core feature is the ability to trip the circuit breaker remotely by applying voltage to the shunt trip terminals. This is essential for safety systems, emergency shutdowns, and automated control.
Clear Wiring Instructions: The wiring table provides precise specifications for wire gauge, torque, and strip length, ensuring proper and secure electrical connections.

Maintenance Features:

Qualified Personnel Requirement: All installation and maintenance tasks must be performed by qualified personnel. This ensures that the work is done correctly and safely, minimizing risks.
Pre-Installation/Maintenance Safety Checks: The manual outlines crucial safety steps before any work:
- Turn off and lock out all power supplying the device.
- Replace all covers before re-energizing the device. These steps are fundamental for preventing electrical hazards during maintenance.
Test Procedure: A clear test procedure is provided to verify the correct operation of the shunt trip:
1. Ensure the circuit breaker is in the "U = 0%" (tripped) state.
2. Switch the circuit breaker to the "ON" position.
3. Verify the "U = 100%" (ready) state.
4. Confirm "OK" status, indicating successful operation. This systematic testing ensures the device is functioning as intended after installation or maintenance.
Durable Design: While not explicitly detailed, the robust construction of Siemens industrial components implies a design for long-term reliability and minimal maintenance under normal operating conditions.
Documentation for Future Reference: The instruction manual is intended to be stored for later use, facilitating future maintenance, troubleshooting, or replacement procedures.

In summary, the Siemens flexible shunt trip (STF) and shunt trip left (STL) are vital safety and control accessories for 3VA molded case circuit breakers. They offer remote tripping capabilities, a wide range of voltage compatibility, and clear installation/maintenance guidelines, all while prioritizing user safety through explicit warnings and procedures.