GE Multilin 469, Instruction Manual

Page: 52 / 338

2–6 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 2: INTRODUCTION
2.2 Specifications
Specifications are subject to change without notice.
2.2.1 Inputs
ANALOG CURRENT INPUTS
Inputs:..................................................................0 to 1 mA, 0 to 20mA, or 4 to 20 mA (settings)
Input impedance: ..........................................226
Ω ±10%
Conversion range: .........................................0 to 21 mA
Accuracy:............................................................±1% of full scale
Type: .....................................................................passive
Analog in supply: ...........................................+24 V DC at 100 mA max.
Response time:
.....................................≤ 100 ms
DIFFERENTIAL CURRENT INPUTS
CT primary: ........................................................1 to 5000A
CT secondary: .................................................1 A or 5 A (settings)
Burden:................................................................<0.2 VA at rated load
Conversion range: .........................................0.02 to 1
× CT primary
Nominal frequency: ......................................20 to 70 Hz
Frequency range: ..........................................20 to 120 Hz
Accuracy:............................................................±0.5% of 1
× CT for 5 A
±0.5% of 5 × CT for 1 A
CT withstand: ..................................................1 second at 80 × rated current,
2 seconds at 40 × rated current, continuous at 3 × rated
current
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 4 K Ω pull-up at
24 V DC with Vce < 4 V DC
See Digital Inputs on page 2–10 for additional specifications.
GROUND CURRENT INPUTS
CT primary: ........................................................1 to 5000 A
CT secondary: .................................................1 A or 5 A (settings)
Burden:................................................................<0.2 VA at rated load for 1 A or 5 A; <0.25 VA for 50:0.025
CTs
at 25 A
Conversion range: .........................................0.02 to 1 × CT primary
Nominal frequency: ......................................20 to 70 Hz
Frequency range: ..........................................20 to 120 Hz
Accuracy:............................................................±0.5% of 1
× CT for 5 A CTs
±0.5% of 5 × CT for 1 A CTs
±0.125 A for 50:0.025 CTs
CT (1 A/5 A) withstand:.................................1 second at 80 × rated current,
2 seconds at 40 × rated current, continuous at 3 × rated
current
CT (50:0.025) withstand: ..............................continuous at 150 mA
PHASE CURRENT INPUTS
CT primary: ........................................................1 to 5000 A