GE Multilin 345 - Monitoring; Inputs

1–14 345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
Monitoring
BREAKER HEALTH
Timer Accuracy:..................................................± 3% of delay setting or ± 1 cycle (whichever is greater) from
pickup to operate
DEMAND
Measured Values: ...............................................Phase A/B/C present and maximum current
Measurement Type:...........................................Thermal Exponential, 90% response time (programmed): 5,
10, 15, 20, 30 minutes
Block Interval / Rolling Demand, time interval (programmed):
5, 10, 15, 20, 30 minutes
Current Pickup Level: ........................................10 to 10000 in steps of 1 A
Dropout Level:...................................................... 96-98% of Pickup level
Level Accuracy: ...................................................± 2%
RTD (49T)
Pickup:......................................................................1 to 250
o
C in steps of 1
o
C
Pickup Hysteresis: ..............................................2
o
C
Time Delay: ...........................................................3 sec
Elements:................................................................ Trip and Alarm
RTD TROUBLE ALARM(49T)
RTD Trouble Alarm: ............................................<-50
o
C or >250
o
C
Inputs
CONTACT INPUTS
Inputs: ......................................................................10
Selectable thresholds: ......................................17, 33, 84, 166 VDC
±10%
Recognition time:................................................1/2 cycle
Debounce time: ...................................................1 to 64 ms, selectable, in steps of 1 ms
Maximum input voltage & continuous
current draw:................................................... 300 VDC, 2 mA, connected to Class 2 source
Type:.........................................................................opto-isolated inputs
External switch: ...................................................wet contact
RTD INPUTS
RTD Type:................................................................100 Ohm platinum (DIN.43760)
RTD Sensing Current: ........................................5 mA
Isolation: ................................................................. 2 kV from base unit (RMIO only)
Distance:.................................................................250 m maximum
Range:......................................................................-50 to +250
o
C
Accuracy: ............................................................... ±3
o
C
Lead Resistance: .................................................25 Ohm max per lead
RTD Trouble Alarm: ............................................<-50 or >250
o
C
RTD Inputs Available: ........................................12 maximum with the RMIO option connected