Wabtec RMS Mors Smitt 1S20 User Manual

Arc fault monitor, advanced protection devices

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1S20 User Guide

Arc Fault Monitor

RMS Mors Smitt

Advanced Protection Devices

User Guide

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Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23

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Page 1 1S20 User Guide Arc Fault Monitor RMS Mors Smitt Advanced Protection Devices User Guide www.morssmitt.com/rms Page 1 Visit for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 2 RMS Mors Smitt 19 Southern Court • Keysborough 3173 • AUSTRALIA Phone +61 3 8544 1200 • Web Email sales.rms@wabtec.com http://www.morssmitt.com/rms www.morssmitt.com/rms Page 2 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 3: Table Of Contents
Contents Contents .......................... 3 Documentation ........................ 5 Technical Bulletin ..........................5 User Guide ............................5 Introduction ........................6 1S20 Variants ........................6 Mounting Arrangements ........................6 Sensor Variants ............................. 6 1S20 Indications ......................7 Front Layout ............................7 Scheme Wiring ........................ 8 1S20 Connection diagram ........................
Page 4 Maintenance ........................32 Mechanical Inspection ......................... 32 Trip Check ............................32 Defect Report Form ..........................33 www.morssmitt.com/rms Page 4 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 5: Documentation
Documentation Technical Bulletin The detailed technical attributes, functional description & performance specifications for the 1S20 are described in the product Technical Bulletin. The order of precedence for product information is as follows: • Technical Bulletin • User Guide User Guide This User Guide covers all 1S20 relay versions &...
Page 6: Introduction
Introduction The 1S20 monitors either one, two or three 1S30 optical sensors to detect the presence of an arcing fault within Metal Clad air insulated switchgear. The 1S20 provides 2 zones or common Arc Fault trip outputs and continuously supervises the optical sensors to ensure maximum availability of the Arc Fault Protection scheme.
Page 7: 1S20 Indications
1S20 Indications Front Layout The pictures below depict the two styles of user interface: Panel Mount or Surface mount Surface Mount Only A single tri colour LED provides the following status indications: www.morssmitt.com/rms Page 7 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice.
Page 8: Scheme Wiring
Scheme Wiring 1S20 Connection diagram The above diagram shows the 1S20 connections. The 1S20 is ordered as either a 2 or 3 sensor version. Sensor connection is not polarity sensitive. www.morssmitt.com/rms Page 8 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 9: Example Schematic
Example Schematic The following typical schematic shows how the 1S20 may be wired to direct trip a circuit breaker tripping. + POS S ens or 1S20 Input s A rc S ensor 1 A rc F ault A rc F ault Fail A larm Trip 2 Trip 1...
Page 10: Function Configuration
Function Configuration The 1S20 configuration switches are accessible to the user by unplugging the electronic module from the terminal base as shown below: Note: Switch 5 is not fitted on 2 sensor variants www.morssmitt.com/rms Page 10 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice.
Page 11: Available Configuration Settings
Available Configuration Settings Note: Switch 5 is not fitted on 2 sensor variants On all variants Arc sensor 1 must be connected otherwise a sensor supervision alarm will assert. www.morssmitt.com/rms Page 11 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 12: 1S20 Dimensions And Mounting Arrangements
1S20 Dimensions and Mounting Arrangements Surface Mount Only Variant www.morssmitt.com/rms Page 12 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 13 Surface mounting detail DIN rail mounting detail www.morssmitt.com/rms Page 13 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 14: Panel Mount Or Surface Mount Variant
Panel Mount or Surface Mount Variant www.morssmitt.com/rms Page 14 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 15 Panel mounting cut out detail Surface mounting detail www.morssmitt.com/rms Page 15 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 16: Din Rail Mounting Kit
DIN rail mounting detail DIN Rail Mounting Kit www.morssmitt.com/rms Page 16 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 17: Sensor Installation
Sensor Installation Sensor Spacing The 1S30 sensor is available as a single detector or dual detector package. The 1S30A single detector version is depicted below showing the location of the detection window and the approximate coverage zone : Detection window Coverage Zone The recommended spacing for the 1S30A single detectors is approximately 5 - 6 m to ensure adequate detection overlap.
Page 18 The 1S30B Dual detector version provides an additional detection window for dual zones of coverage as depicted below : Detection windows The recommended spacing for the 1S30B single detectors is approximately 5 - 6 m to ensure adequate detection overlap, this combination provides an overall coverage zone of approximately 10 - 12 m.
Page 19: Sensor Placement
The 1S30A and 1S30B sensors may also be mixed to provide various coverage combinations, again spacings of approximately 5 - 6 m should be observed to ensure adequate detection overlap. 10 - 12m Sensor Placement Sensors need to be mounted to provide full coverage of the switchgear cubicles to be protected. Where the protected zone is larger than the sensor coverage then the use of multiple sensors is required.
Page 20: Example Sensor Placement
Example Sensor Placement The following are some typical examples of sensor placement. Sensor placement inside the CB racking chamber Sensor placement inside the busbar chamber www.morssmitt.com/rms Page 20 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 21 Sensor placement inside the cable termination chamber Sensor placement for switchgear Busbar coverage (External through Hole Detector) www.morssmitt.com/rms Page 21 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 22 Sensor placement near a Low Voltage Contactor for a Variable Speed Drive Sensor placement for a Switchgear cable termination chamber (External through Hole Detector) www.morssmitt.com/rms Page 22 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 23 Sensor placement for an end of Bus chamber (External through Hole Detector) Sensor placement for a Switchgear cable termination chamber (External through Hole Detector) www.morssmitt.com/rms Page 23 for the latest product information. Due to RMS continuous product improvement policy this information is subject to change without notice. 1S20_User_Guide/Iss C/10/07/23...
Page 24: Commissioning
Commissioning Commissioning Preliminaries Carefully examine the module to ensure that no damage has occurred during transit. Check that the model number and rating information are correct. Insulation The relay, and its associated wiring, may be insulation tested between: - all electrically isolated circuits - all circuits and earth An electronic or brushless insulation tester should be used, having a dc voltage not exceeding 1000V.
Page 25: Site Commissioning Verification Checklist
Site Commissioning Verification Checklist Observe all site specific standard safety procedures. The following tests are undertaken following the completion of all 1S20 ARC Monitor scheme wiring and the wiring of all 1S30 sensors. System Power Up Item Description Complete Confirm all necessary primary equipment isolations Confirm all necessary secondary equipment isolations (including trip outputs) Check fitment of 1S30 optical sensors and cable condition...
Page 26: Arc Trip Testing
Arc Trip Testing Item Description Complete Initiate the operation of each sensor by the use of a suitable high power camera flash * If a current check interlock is employed in your ARC Fault protection scheme ensure that current is injected into the associated Overcurrent relay to cause operation of the current check element at the same time the sensor is flashed Check for correct operation of the 1S20 LED to indicate a trip...
Page 27: Arc Trip Trouble Shooting
ARC Trip Trouble Shooting If an arc trip occurs without an ARC being present this indicates either: - a very high ambient light condition is triggering a sensor - short circuit wiring of a 1S30 sensor In both cases if the condition persists the Fail alarm output will operate. Item Description Complete...
Page 28: Installation
Installation Handling of Electronic Equipment A person’s normal movements can easily generate electrostatic potentials of several thousand volts. Discharge of these voltages into semiconductor devices when handling electronic circuits can cause serious damage, which often may not be immediately apparent, but the reliability of the circuit will have been reduced.
Page 29: Safety Section
Safety Section This Safety Section should be read before commencing any work on the equipment. The information in the Safety Section of the product documentation is intended to ensure that products are properly installed and handled in order to maintain them in a safe condition. It is assumed that everyone who will be associated with the equipment will be familiar with the contents of the Safety Section.
Page 30: Equipment Operating Conditions
Equipment Operating Conditions The equipment should be operated within the specified electrical and environmental limits. Protective relays, although generally of robust construction, require careful treatment prior to installation and a wise selection of site. By observing a few simple rules, the possibility of premature failure is eliminated, and a high degree of performance can be expected.
Page 31: Decommissioning & Disposal
Decommissioning & Disposal Decommissioning: The auxiliary supply circuit in the relay may include capacitors across the supply or to earth. To avoid electric shock or energy hazards, after completely isolating the supplies to the relay (both poles of any dc supply), the capacitors should be safely discharged via the external terminals prior to decommissioning.
Page 32 Maintenance The 1S20 is equipped with a relay self checking watchdog and sensor supervision output alarm contact, this contact should be monitored by a system control and data acquisition system. The Arc Fault system requires attention should the output alarm contact operates. As with any protection system, routine checks of the trip wiring should be performed at intervals as determined by local experience and site conditions and as documented in local asset management philosophy and plans.
Page 33 Defect Report Form Please copy this sheet and use it to report any defect which may occur. Customers Name & Address: Contact Name: Telephone No: Fax No: Supplied by: Date when installed: Site: Circuit: When Defect Found Date: Commissioning? Maintenance? Systems Fault? Other, Please State: Product Part No:...