RMS 1S25 Series Technical Bulletin Download

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Due to RMS continuous product improvement policy this information is subject to change without notice. 1S25/Issue F/07/03/2011 - 4/9

ZONE 1

ARC PROTECTION

COMMON

ALARM

OUTPUT

1S25

50/51

HEALTH Y

Z ONE 2

Z ONE 3

Z ONE 4

Z ONE 1

Cus tom te xt

FAIL

T RIP

RESET

/T EST

TRIP

Figure 6:

Up to eight arc sensors distributed in low voltage switchgear.

Over current check stage depicted.

Low Voltage Applications

LOW VOLTAGE ARC PROTECTION

Figures 6 & 7 depict how the 1S25 may also be applied for low

voltage panels & MCC switchgear.
Figure 6 depicts an arrangement where over current check stage

is employed while the protection application depicted in figure 7

is a system based solely on arc detection.

1S25

HEALTH Y

Z ONE 2

Z ONE 3

Z ONE 4

Z ONE 1

Cus tom te xt

FAIL

T RIP

RESET

/T EST

COMMON

TRIP

ALARM

OUTPUTS

Figure 7:

Up to eight arc sensors distributed in low voltage switchgear or

MCC compartments without over current check

Summary of Contents for 1S25 Series

Page 1: ...oyed poisonous gases are emitted A 1s arc destroys most of the switchgear may cause a fire injury to personnel damage to property Technical Bulletin 1S25 Arc Fault Monitor 4 Zones 8 Sensors 1S25 depicted in a 2M28 S draw out case with custom alarm text engraving ARC Fault Protection Made in Australia Arc fault protection is a relatively new technique employed for the fast clearance of arcing fault...

Page 2: ...n 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 the internal relay timers This starter element should be set for instantaneous operation so that it will pick up in the order of 15ms An Arc Fault Monitor relay 1S25 is installed on the switchg...

Page 3: ...ROTECTION Figure 5 depicts how the 1S25 may also be applied for the protection of bus bars The number of sensors in the bus chamber is dictated by the switchgear design and the length of switchboard In most indoor metal clad switchgear the bus bar chamber is a continuous chamber between panels only broken into segregated sections at a bus section breaker as such the strategic placement of one or t...

Page 4: ... switchgear Over current check stage depicted Low Voltage Applications LOW VOLTAGE ARC PROTECTION Figures 6 7 depict how the 1S25 may also be applied for low voltage panels MCC switchgear Figure 6 depicts an arrangement where over current check stage is employed while the protection application depicted in figure 7 is a system based solely on arc detection 1S25 HEALTH Y ZONE 2 ZONE 3 ZONE 4 ZONE 1...

Page 5: ...pping scheme usually results in reduced system security The arc detection method can however combine the 1S25 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 8 ARC FAULT TRIP INITIATE CB ARC FAULT MONITOR SENSOR OVER CURRENT R...

Page 6: ... panels STATUS INPUT MINIMUM OPERATING CURRENT 10mA P U for 1ms then reducing to1 5mA after 4ms RESET Press the front reset button or pulse the reset status input Technical Data OUTPUT CONTACTS Tripping contacts 8 2 N O per tripping zone Common tripping contact 1 N O Fail alarm 1 C O contact for the power supply CPU fail arc fault sensor Normally picked up drops out to signal an alarm condition OU...

Page 7: ...nput Configuration switches Primary PCB 7 9 11 13 15 17 19 21 Zone 1 Arc sensor input 1S30 Arc Fault Sensors Zone 2 Arc sensor input Zone 3 Arc sensor input Zone 4 Arc sensor input 6 8 Zone 1 Trip Zone 1 Trip Zone 2 Trip Zone 2 Trip 4 Common Trip Switch 1 Switch 2 Switch 3 Switch 4 BANK A BANK B BANK C 27 25 23 Fail Healthy Alarm common Signal processing and logic functions ON ON ON Arc sensor fau...

Page 8: ...aw out case ACCESSORIES SUPPLIED WITH EACH RELAY 1 x M4 self threading mounting screw kit P N 290 406 151 2 x M4 terminal screw kit 28 per kit P N 290 407 153 1 x Product Test Manual 1S30 ARC FAULT SENSORS Refer to the 1S30 Technical Bulletin for details Figure 11 1S30 Arc Fault Sensors Through panel mounting detector version depicted at left Front panel view of dual detector version depicted at r...

Page 9: ...e 1S25 product ordering code For maximum font size limit text for each alarm point to 1 line x 10 characters Text will be left justified Zone 1 Zone 2 Zone 3 Zone 4 Ordering Information ORDER CODE The order code determines the production build in the factory cannot be changed in the field Generate the required order code as follows e g 1S25 BA Order Code General Type 1 2 1S25 1 AUXILIARY SUPPLY RA...

Page 10: ...supplied in secure individual packing cardboard boxes with moulded styrene inserts suitable for recycling Each product packing box is labeled with the product part number customer name order details Design References The products components produced by RMS are based on many years of field experience since Relays Pty Ltd was formed in 1955 A large population of equipment is in service throughout Au...

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