Siemens SIKOSTART 3RW34 User Manual (English)

Other manuals for Siemens SIKOSTART 3RW34

Questions and Answers:

C
castrorobertAug 20, 2025
What to do if Siemens Controller motor does not start?
- K
  Kristen MckeeAug 20, 2025
  If the Siemens Controller's motor doesn't start, verify the input side of terminals L1, L2, and L3 for an open disconnect switch, a tripped breaker, or loose terminal connections. Ensure the correct three-phase incoming power is present. Also, check the input side of control terminals X1 and X2 for a blown fuse, any open circuit, or loose connections and ensure proper control voltage (within +10%, -15% of the nominal controller rating). If a control power transformer (CPT) is used, check that the CPT primary voltage is present and correct for the CPT primary tap.
D
dominique43Aug 22, 2025
Why Siemens Controller is off but motor is running?
- R
  rachelbrownAug 22, 2025
  If the Siemens Controller is off but the motor is running, check the voltage from terminal A1 to A2 to ensure that the Run coil is not energized. Also, examine the SCRs as described in paragraph 9.4 to identify any shorts.
M
mooretanyaAug 25, 2025
What to do if Siemens Controller motor overload relay trips during starting while running?
- S
  sschroederAug 25, 2025
  If the Siemens Controller's motor overload relay trips during starting or while running, it indicates that the motor is overloaded. Check for any mechanical causes of the overload and resolve them.
P
Pam MillerAug 26, 2025
Why Siemens SIKOSTART 3RW34 Controller motor starts but does not come up to speed?
- D
  Debbie PenningtonAug 27, 2025
  If the Siemens Controller's motor starts but doesn't reach full speed, ensure that LED 2 is illuminated, indicating that the output voltage matches the line voltage. If the motor is accelerating too slowly, decrease the Start Time T1 and/or increase the Initial Voltage U.
L
Lauren VaughnAug 28, 2025
What to do if Siemens Controller motor branch circuit protection trips during starting or running?
- H
  hansenchadAug 28, 2025
  If the Siemens Controller's motor branch circuit protection trips during starting or running, ensure the protective device is correctly sized according to applicable codes (NEC/CEC) and verify the circuit breaker trip settings. Also, inspect all power wiring connections for any phase-to-phase or phase-to-ground shorts.
B
Brenda GonzalesAug 29, 2025
Why Siemens Controller motor starts hard, not softly?
- E
  Evan WashingtonAug 30, 2025
  If the Siemens Controller's motor starts hard instead of softly, it suggests improper setup. Refer to paragraph 6.6 for instructions on adjusting motor starting parameters.
M
Molly HoldenSep 1, 2025
Why Siemens SIKOSTART 3RW34 Controller motor growls or hums at start but comes up to speed?
- C
  Carla BurnsSep 1, 2025
  If the Siemens Controller's motor growls or hums at the start but eventually reaches full speed, it's likely that the Initial Voltage U is set too low. Increase the setting of Initial Voltage U until the motor begins to rotate smoothly.
M
maciasthomasSep 3, 2025
What to do if Siemens SIKOSTART 3RW34 Controller motor is not able to accelerate load?
- O
  Olivia CalderonSep 3, 2025
  If the Siemens Controller's motor is not able to accelerate the load, check if the motor comes up to speed when started by applying full voltage directly. Alternatively, use the controller with T1 set at 0 (0.5 seconds) and U at F (80% full voltage).
P
Paula RossSep 4, 2025
Why Siemens SIKOSTART 3RW34 Controller motor growls at start and does not come up to speed?
- A
  anna66Sep 5, 2025
  If the Siemens Controller's motor growls at the start and does not reach full speed, it indicates that the motor is unable to start the load. Check the load for mechanical obstructions such as rocks, logs, or seized bearings. Consider increasing the motor size; refer to the documentation for proper controller selection.
K
Kevin PattersonSep 7, 2025
How to fix if Siemens Controller motor comes up slowly?
- A
  Andrea VasquezSep 7, 2025
  If the Siemens Controller's motor comes up slowly, adjust the Start Time T1 and Initial Voltage U settings according to the instructions provided in the documentation.

Siemens SIKOSTART 3RW34 Specifications

General

Brand	Siemens
Model	SIKOSTART 3RW34
Category	Controller
Language	English

Summary

Safety Information

Signal Words and Qualified Person

Defines hazard signal words and requirements for qualified personnel.

Introduction

Scope, Features, and Applications

Covers manual scope, product features, and typical uses/benefits.

Operating Principle

Function Overview and Description

Explains voltage ramp design, DSP control, power poles, and snubber PCB.

Three-Phase System Basics

Details three-phase voltage waveforms and phase relationships.

Wye and Delta Motor Connections

Explains power wiring configurations for wye and delta motors.

Controller-to-Motor Wiring and Starting

Covers wiring for wye/delta, soft start/stop, and torque/speed curves.

Soft Start and Soft Stop Operation

Details voltage/speed curves for coast-to-rest and controlled deceleration stops.

Controller Selection

Rating Selection Guidelines

Advises on choosing controllers based on "In Line" and "Inside Delta" ratings.

Installation

Incoming Inspection and Mounting

Covers unpacking, storage, physical mounting, and ventilation.

Installation Precautions and Branch Circuits

Discusses safety, branch circuit protection, and controller protection.

Electrical Noise and General Wiring

Addresses noise suppression techniques and general practices for wiring.

Power, Motor, Grounding, and Control Wiring

Details wiring for power, motor, grounding, control, and coil suppression.

Power and Motor Connections

Guides on connecting power supply and motor terminals to the controller.

Control Connections and Final Checks

Connects control power and pilot devices, and performs final installation checks.

Wiring Diagrams

Typical Applications and Circuit Devices

Introduces wiring diagrams and explains common circuit devices used.

Setup and Operation

Setup Controls and Indicators

Details potentiometers, DIP switch settings, and LED status/fault indicators.

Controller Setup and Preliminary Checks

Provides steps for setting up the controller and performing initial checks.

Initial Energization and Motor Adjustments

Guides on initial power-up, voltage checks, and adjusting start parameters.

Electrical Specifications

Voltage, Frequency, and Current Ratings

Lists requirements for voltage, frequency, phase, and controller current ratings.

Output, Input, and Fuse Specifications

Details user outputs, input coil characteristics, and recommended fuse types.

Dimensions

Controller Dimensions and Mounting

Presents physical dimensions and mounting hole locations for various models.

Troubleshooting

Maintenance and LED Faults

Covers general maintenance, troubleshooting checklist, and LED fault indications.

General Troubleshooting Guide

Lists common motor issues, causes, and recommended remedies.

Inside Delta Wiring Issues

Details common wiring errors for inside delta configurations and their effects.

Shorted SCR Checks and SCR Testing

Describes methods to check for shorted SCRs and perform functional tests.

SCR Tests and Equipment

Lists test equipment and procedures for basic SCR tests (gate integrity, insulation, blocking).

Advanced SCR Tests

Explains advanced tests for gate triggering, latching, and holding.

Spare and Optional Parts

Spare Parts Catalog

Lists catalog numbers for logic boards, cooling fans, and power modules.

Optional Parts and Accessories

Details optional modules, lug kits, and overload relays available.

Appendix A: Fuse Protection

Appendix B: Motor Power Ratings

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Siemens SIKOSTART 3RW34 User Manual

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