Outputs - GE 889 Instruction Manual

CHAPTER 1: INTRODUCTION

Outputs

889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
RTD INPUTS
Types (3-wire): ......................................................100 Ω Platinum, 120 Ω Nickel, 100 Ω Nickel, 10 Ω Copper
Sensing current:...................................................5 mA
Range: ......................................................................–40 to +250°C (-40 to +482°F)
Accuracy:................................................................±2°C (±4°F)
Isolation:..................................................................36 V pk-pk (a group of RTDs to ground)
Lead Resistance:..................................................25 Ohms max. per lead for platinum or nickel and 3 Ohms
ANALOG OUTPUTS
Range (configurable):........................................0 to 1mA, 0 to 5mA, 0 to 10mA, 0 to 20mA, 4 to 20mA
Max. load resistance:.........................................10 kΩ @ 1 mA,
Accuracy:................................................................± 1% of full scale
Isolation:..................................................................500V DC for one minute (functional isolation between analog
Driving Signal:.......................................................any Analog quantity
Sampling Interval: ..............................................Typically 500 ms
Upper and lower limit
(for the driving signal):................................-90 to 90 pu in steps of 0.001
TRIP/CLOSE OUTPUT RELAYS
(Relays #1 and #2 from Slot F, Relays #9 and #10 from Slot G)
Type: .........................................................................FORM-A
Configuration:.......................................................2 (two) electromechanical
Contact material: ................................................silver-alloy
Operate time:........................................................<8 ms
Continuous current:...........................................10 A
Make and carry for 0.2s:..................................30 A per ANSI C37.90
Break (DC inductive, L/R=40 ms):.................24 V / 1 A
Break (DC resistive):............................................24 V / 10 A
Break (AC inductive): ..........................................720 VA @ 250 VAC Pilot duty A300
Break (AC resistive): ............................................277 VAC / 10 A
Operation Mode:..................................................Self-Reset, Latched, Pulsed, Non-Failsafe, Failsafe
FORM-A VOLTAGE MONITOR
Applicable voltage:.............................................20 to 250 VDC
Trickle current:......................................................1 to 2.5 mA
Timer acurracy: ...................................................± 3% of operate time or ± 1/4 cycle (whichever is greater)
max. per lead for copper RTDs
600 Ω @ 20 mA
inputs and output group; and each group of chassis)
48 V / 0.5 A
125 V / 0.3 A
250 V / 0.2 A
48 V / 6 A
125 V / 0.5 A
250 V / 0.3 A
SPECIFICATIONS
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