RMS 1S20-FAB Manual Download

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rms

1S20

1 S 2 0 | W 1 1 | 0 9 / 0 3 / 2 0 1 7

Arc Flash Protection

High speed arc fault protection for metal clad air Insulated
switchgear utilizing optical sensors.

Compact, economic design

Simple panel mounting for retrofit applications

Two or three arc sensor inputs

Made in Australia

Summary of Contents for 1S20-FAB

Page 1: ...Flash Protection High speed arc fault protection for metal clad air Insulated switchgear utilizing optical sensors Compact economic design Simple panel mounting for retrofit applications Two or three arc sensor inputs Made in Australia ...

Page 2: ...that may be flush panel surface or rail mounted A plug in terminal block is provided to allow panel pre wiring Arc Flash Protection Arc fault protection is a relatively new technique employed for the clearance of arcing faults on low voltage panels MCC s BUS bars and within metal clad switchgear and associated cable boxes Conventional current based protection techniques are at times challenged by ...

Page 3: ... results in reduced system security The arc detection method can however combine the 1S20 optical detection technique with a traditional overcurrent method to maximize system security particularly for BUS bar protection schemes Both conditions must coexist for the trip condition to be met as depicted in figure 3 Figure 3 Key components required to implement an Arc Fault Protection scheme with an o...

Page 4: ...eaker BUS overcurrent check not shown in the event of an arc fault in the CB chamber Existing Switchgear Applications The existing overcurrent relay protecting the feeder will normally provide an independent output contact associated with the start current setting of the relay That is an output contact that will close when a phase or earth fault current is detected above the threshold which starts...

Page 5: ... of the 1S20 LED is achieved by momentary interruption of the power supply using a SCADA controlled series contact The DIN rail mounting option is a convenient alternative in this situation Combined Bus Bar Switchgear Arc Protection Figure 7 shows an application where a single 1S20 is applied for the protection of the Cable box CT chamber plus the CB chamber BUS chamber using three sensors In this...

Page 6: ...to segregated sections at a bus section breaker as such the strategic placement of one or two arc sensors in each bus bar chamber run is normally adequate Some indoor metal clad switchgear may segregate the bus chamber of each panel from the next via insulated bus chamber side barriers per panel if this is the case then each bus chamber per panel would need to be monitored by at least one arc sens...

Page 7: ...s 10 and 11 Figure 10 Front panel mode selector switch Figure 11 1S20 rear view showing configuration switches WARNING Removal of the 1S20 from the base may expose live terminals Arc Sensor Circuit Supervision The 1S30 Arc Sensor is the heart of the system supervision of circuit continuity is critical for correct operation To monitor the integrity of the wiring between the 1S30 arc sensor 1S20 Arc...

Page 8: ... dc Make and Carry L R 40ms and 300V 20A ac or dc for 0 5s 30A ac or dc for 0 2s Breaking Capacity L R 40ms and 300V AC Resistive 1 250VA AC Inductive 250VA at p f 0 4 DC Resistive 75W DC Inductive 30W at L R 40ms 50W at L R 10ms Minimum Load 100mA 12V Operating Time Arc fault trip contacts guaranteed to pick up in less than 10ms including bounce Typical operate time is 7ms CRO trace showing nomin...

Page 9: ...p 60 s Clearances and Creepage Distances Standard IEC 60255 26 10 6 3 Test Identification Test specification Pollution degree 2 Overvoltage category III Rated insulation voltage 300 V rms or dc Clearances and Creepage Compliance CAD drawings assessment Safety related Electrical Tests Standard IEC 60255 27 10 6 4 Test Identification Test specification Between Independent Circuits 5 kV 1 2 50 μs 0 5...

Page 10: ...ss 1 Test Identification Test specification Variation Vibration Response in each of 3 axes 0 035 mm 0 5 gn peak 1 sweep cycle 10 150 Hz No Mal Op Vibration Endurance in each of 3 axes 1 0 gn peak 20 sweep cycles 10 150 Hz Non energized Shock and Bump Standard IEC 60255 21 2 Class 1 Test Identification Test specification Variation Shock Response in each of 3 axes 5 gn 11 ms 3 pulses in each directi...

Page 11: ...55 26 7 2 7 Acceptance criterion B Port Auxiliary power supply Input and Output Test Identification Test specification Variation Line to earth 4 kV peak No Mal Op Line to line 2 kV peak No Mal Op Conducted Disturbance Induced by RF Fields Standard IEC 60255 26 7 2 8 Acceptance criterion A Port Auxiliary power supply Input and Output Functional Earth Test Identification Test specification Variation...

Page 12: ...Always wire Arc Sensor 1 Arc Sensors 2 3 are optional 1S20 application diagram Circuits shown in de energised condition 12 8 10 9 9 5 1 3 11 6 2 4 Vx Fail alarm Arc 1 Must bewired Arc 3 Arc 2 Arc fault trip alarm signal to protection relay status input for comms I start Control Protection 1S20 50 51 Overcurrent relay Arc fault relay I CB Aux Switch Trip Coil 52 T 52 a ...

Page 13: ...e protection relay as depicted in figures 15 16 and 17 This version may also be surface mounted by reversing the terminal block retaining screws It may also be DIN rail mounting when the optional 290407157 DIN Rail Mounting Kit is fitted Refer figures 19 and 22 Figure 15 1S20 through hole panel mount version Figure 16 Panel mount version side view SERIAL NO RATING LABEL ON MODULE SIDE FOR PANEL MO...

Page 14: ...w w w r m s p l c o m a u rms 14 1S20 Mounting and Dimensions Panel Mount Version Figure 17 Panel mounting cut out detail Figure 18 Surface mounting detail Figure 19 DIN rail mounting detail ...

Page 15: ...g and Dimensions rms Surface Mount Version Figure 20 Surface mounting detail Figure 21 DIN rail mounting detail Figure 22 DIN rail clip fitting detail Specify DIN Rail Mounting Kit P N 290407157 DIN RAIL MOUNTING KIT ...

Page 16: ...N rail kit supplied Sensors A Two arc sensor inputs Default B Three arc sensor inputs 1S20 Relay Order Codes Auxiliary Supply Order Code Change Guide Old Applied Auxiliary Voltage New 1S20 Axx 1S20 Axx 1S20 Axx 24 32 48V DC 110V AC 230 240 250V AC 1S20 Fxx 1S20 Gxx 1S20 Hxx 1S20 Cxx 110 125V DC 1S20 Gxx 1S20 Dxx 220 240 250V DC 1S20 Hxx 1S20 Exx 110V AC 1S20 Gxx When used with AC DC power supply a...

Page 17: ... A sensor version with two optical detectors looking in opposite directions is available for this purpose Refer figure 3 for generic layout Technical Bulletin 1S30 Optical Arc Fault Sensor 1S30 Arc Fault Sensors Through panel mounting detector Front panel view of dual detector View depicted at left version depicted at right Description Made in Australia The 1S30 is an optical sensor that responds ...

Page 18: ...ure 3 Detector Characteristics OPTICAL SENSITIVITY 10 000 Lux for white light at normal incidence to the detector window s as depicted in figure 4 Rear Detector 1S30 B models only Light Source Front Detector 1S30 A B models Light Source Figure 4 For the 1S30 A single detector version the front detector only is fitted In this configuration the 1S30 A will be insensitive to white light incident on t...

Page 19: ...0 Arc Fault Monitor unit Figure 9 1S30 shown mounted on the inside of a switchgear panel This configuration combines the functions described in Figures 6 7 with the application of a single dual detector arc fault sensor PANEL MOUNT CUT OUT DETAIL Figure 10 Flush mounting detail RIGHT ANGLE MOUNTING OFF A SURFACE A right angle mounting bracket may be fabricated using the panel cut out detail in fig...

Page 20: ...oulded construction to IP51 TEMPERATURE RANGE Operating 5 to 55oC Storage 25 to 75oC Technical Data SENSOR CONNECTIONS The 1S30 is supplied with a 6m two core connection cable as standard Two core multi strand wire 2x16 0 2mm is supplied stripped pre tinned at the 1S20 connection end The standard 6m cable may be cut down to the desired length crimp ring lugs fitted for termination to the 1S20 1S25...

Page 21: ...ing Information Generate the required ordering code as follows e g 1S30 A 1 DETECTORS A Single through hole panel detector B Dual detectors 2 SPECIFY OPTIONS 6m unshielded cable Standard F Flush mount reinforcing plate required S 6m shielded cable required L 20m shielded cable required Order Code Serial No Optional second optical detector looks forward through front label window Figure 17 1S30 Arc...

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