Siemens SENTRON 3VL800 User Manual

System Manual
SENTRON
Protection devices
3VL IEC molded case circuit breakers
11/2013Edition
Answers for Infrastructure & Cities.

Siemens SENTRON 3VL800 Specifications

General

Rated Current	800 A
Rated Voltage	690 V
Breaking Capacity Icu at 415 V	100 kA
Breaking Capacity Icu at 440 V	100 kA
Overload Protection	Yes
Short-Circuit Protection	Yes
Trip Unit	Electronic
Mounting	Fixed
Standards	IEC 60947-2
Protection Class	IP20
Type	SENTRON 3VL800
Number of Poles	3
Size	Size III

Summary

Configuration

Functional principle

Explains the mechanical design, trip-free mechanism, and current limiting principle of the circuit breakers.

Thermal-magnetic overcurrent trip units

Describes the components and functioning of thermal-magnetic overcurrent releases.

Electronic overcurrent trip unit (ETU)

Explains the operation and components of electronic trip units using current transformers and microprocessors.

Motorized operating mechanisms (optional)

Motorized operating mechanism with stored energy mechanism (SEO)

Explains the SEO mechanism for synchronization tasks, its operation, and manual actuator handle location.

Motorized operating mechanism (MO)

Describes the MO mechanism for remote switching, its status indicators, and operational modes (LOCAL, MANUAL, AUTO).

Functions

Protection functions

Introduces protection functions like overcurrent release and explains the magnetic repulsion principle.

Function overview of the overcurrent release

Provides a table summarizing the functions and release types for various order supplements.

Setting options of the overcurrent release

Presents a detailed table of setting options for overload, short-circuit, and ground-fault protection across different releases.

Differential current protection with RCD module

Explains the use of RCD modules for double function protection against overload, short-circuit, and ground faults.

Ground-fault protection

Explains ground fault trip 'G' for capturing fault currents to ground, time-graded discrimination, and measurement methods.

Application planning

Use with frequency converters

Explains the use of 3VL molded case circuit breakers as protection devices in systems with frequency converters and variable-speed drives.

Transformer protection on the primary side

Covers transformer protection on the primary side, addressing inrush currents and short-circuit limitations.

Use in motor protection

Details the application and protection functions for motors, including trip classes and thermal image.

Use in unusual environments:

Covers factors to consider when using circuit breakers outside control cabinets or in difficult conditions, like altitude and temperature.

Use in series connection

Explains selectivity and time selectivity for molded case circuit breakers connected in series.

Installing/mounting

Installation methods

Overviews the available installation methods: fixed-mounted, plug-in, and withdrawable versions.

Mounting and safety clearances

Specifies permissible mounting positions (unlimited and limited) and required safety clearances.

Locking devices

Locking devices for a padlock

Locking device with a safety lock

Mutual interlocking of two molded case circuit breakers

Connecting

Cables and busbars

Main connection types for fixed mounting

Main connection methods for plug-in and withdrawable version

Displays and operator controls

Overcurrent trip unit without LCD display

Overcurrent trip units with LCD display

Parameter assignment / addressing

Setting the parameters

Guides on setting parameters on the ETU, including adjusting settings and understanding tripping characteristic curves.

Setting the protection parameters for motor protection (ETU10M, ETU30M and LCD-ETU 40M)

Details setting overload release IR, short-circuit release Ii, and trip classes for motor protection.

Service and maintenance

Preventive measures

Outlines preventive measures and inspection intervals, emphasizing the need for qualified personnel.

Inspection

Troubleshooting

Notes on troubleshooting

Offers a table with common circuit breaker issues, their causes, and corrective actions.

Technical data

Configuration of main connections

Derating factors

Capacitor banks

Motor Protection

Lists characteristic values for motor protection with different trip classes (ETU10M, ETU30M, ETU40M).

RCD modules

Undervoltage release

Provides technical data for undervoltage releases, including operating voltage, power consumption, and opening time.

Shunt release

Details technical data for shunt releases, including response voltage, power consumption, and opening time.

Ground-fault detection

Circuit diagrams

The circuit diagram examples below show the most frequent uses of the 3VL molded case circuit breaker

Circuit diagrams VL1 ... 8 motorized operating mechanism (MO)

Control with undervoltage release

Circuit diagrams VL1 ... 6, motorized operating mechanism with stored energy mechanism, with or without undervoltage release

Circuit diagrams, undervoltage release and shunt release

Circuit diagrams 3VL plus RCD module