Specifications, 1 489 specifications, 2 specifications – GE 489 User Manual
Page 12: 489 specifications -4
1-4
489 Generator Management Relay
GE Multilin
1.2 SPECIFICATIONS
1 INTRODUCTION
1
1.2SPECIFICATIONS
1.2.1 489 SPECIFICATIONS
POWER SUPPLY
Options:
LO / HI
(must be specified when ordering)
LO Range:
DC: 20 to 60 V DC
AC: 20 to 48 V AC at 48 to 62 Hz
HI Range:
DC: 90 to 300 V DC
AC: 70 to 265 V AC at 48 to 62 Hz
Power:
45 VA (max), 25 VA typical
Proper operation time without supply voltage: 30 ms
AC ANALOG INPUTS FREQUENCY TRACKING
Frequency Tracking:
Va for wye, Vab for open delta
6 V minimum, 10 Hz/sec.
OUTPUT AND NEUTRAL END CURRENT INPUTS
CT Primary:
10 to 50000 A
CT Secondary:
1 A or 5 A (must be specified with order)
Conversion Range:
0.02 to 20
× CT
Accuracy:
at
< 2 × CT: ±0.5% of 2 × CT
at
≥ 2 × CT: ±1% of 20 × CT
Burden:
Less than 0.2 VA at rated load
CT Withstand:
1 second at 80 times rated current
2 seconds at 40 times rated current
continuous at 3 times rated current
GROUND CURRENT INPUT
CT Primary:
10 to 10000 A (1 A / 5 A CTs)
CT Secondary:
1 A / 5 A or 50:0.025 (HGF CTs)
Conversion Range:
0.02 to 20
× CT for 1 A / 5 A CTs
0.0 to 100 A pri. for 50:0.025 CTs (HGF)
50:0.025 CT Accuracy: ± 0.1 A at
< 10 A
± 1.0 A at
≥ 10 to 100 A
1 A / 5 A CT Accuracy:
at
< 2 × CT: ±0.5% of 2 × CT
at
≥
2
× CT: ±1% of 20 × CT
GROUND CT BURDEN
GROUND CT CURRENT WITHSTAND (
SECONDARY
)
PHASE VOLTAGE INPUTS
VT Ratio:
1.00 to 240.00:1 in steps of 0.01
VT Secondary:
200 V AC (full-scale)
Conversion Range:
0.02 to 1.00
× Full Scale
Accuracy:
±0.5% of Full Scale
Max. Continuous:
280 V AC
Burden:
> 500 KΩ
NEUTRAL VOLTAGE INPUT
VT Ratio:
1.00 to 240.00:1 in steps of 0.01
VT Secondary:
100 V AC (full-scale)
Conversion Range:
0.005 to 1.00
× Full Scale
Accuracy:
Fundamental:+/-0.5% of Full Scale
3rd Harmonic at >3V secondary: +/-5%
of reading
3rd Harmonic at < 3V secondary: +/-
0.15% of full scale
Max. Continuous:
280 V AC
DIGITAL INPUTS
Inputs:
9 opto-isolated inputs
External Switch:
dry contact
< 400 Ω, or open collector
NPN transistor from sensor
6 mA sinking from internal 4K pullup at
24 V DC with Vce
< 4 V DC
489 Sensor Supply:
24 V DC at 20 mA max.
RTD INPUTS
RTDs (3 wire type):
100
Ω Platinum (DIN.43760)
100
Ω Nickel, 120 Ω Nickel,
10
Ω Copper
RTD Sensing Current:
5 mA
Isolation:
36 Vpk
(isolated with analog inputs and outputs)
Range:
–50 to +250°C
Accuracy:
±2°C for Platinum and Nickel
±5°C for Copper
Lead Resistance:
25
Ω Max per lead
No Sensor:
>1 kΩ
Short/Low Alarm:
< –50°C
TRIP COIL SUPERVISION
Applicable Voltage:
20 to 300 V DC/AC
Trickle Current:
2 to 5 mA
ANALOG CURRENT INPUTS
Current Inputs:
0 to 1 mA, 0 to 20 mA, 4 to 20mA
(setpoint)
Input Impedance:
226
Ω ±10%
Conversion Range:
0 to 2 mA
Accuracy:
±1% of full scale
Type:
Passive
Analog Input Supply:
+24 V DC at 100 mA max.
Sampling Interval:
50 ms
COMMUNICATIONS PORTS
RS232 Port:
1, Front Panel, non-isolated
RS485 Ports:
2, Isolated together at 36 Vpk
GROUND
CT
INPUT
BURDEN
VA
Ω
1 A / 5 A
1 A
0.024
0.024
5 A
0.605
0.024
20 A
9.809
0.024
50:0.025
HGF
0.025 A
0.057
90.7
0.1 A
0.634
90.7
0.5 A
18.9
75.6
GROUND CT
WITHSTAND TIME
1 SEC.
2 SEC.
CONTINUOUS
1 A / 5 A
80
× CT
40
× CT
3
× CT
50:0.025 HGF
N/A
N/A
150 mA