GE 845

1–26 845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 1: INTRODUCTION
AUXILIARY OUTPUT RELAYS
(Relays #3, #4 and the Critical Failure Relay from Slot F, and Relays #11, #12 and #16 from
Slot G)
Type:.........................................................................FORM-C
Configuration: ......................................................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
48 V / 0.5 A
125 V / 0.3 A
250 V / 0.2 A
Break (DC resistive): ...........................................24 V / 10 A
48 V / 6 A
125 V / 0.5 A
250 V / 0.3 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
Breaking Capacity:.............................................For Form-C relays the following ratings are applied to meet
UL508 requirements: 1 second “ON”/10 seconds “OFF” per
output relay at maximum rating
FAST PATH:
For 2 IO_A module configuration the following ratings are applied to meet UL508
requirements: 1 second “on”/ 10 seconds “off” per output relay at max rating.
PULSED OUTPUTS
Mode:........................................................................ 3-phase positive and negative active energy measurement,
3-phase positive and negative reactive energy
measurements
Principle: .................................................................Pulsed output is energized for one second and then de-
energized for one second after the programed energy
increment.
Power Supply
POWER SUPPLY
Nominal DC Voltage:.........................................125 to 250 V
Minimum DC Voltage:.......................................88 V
Maximum DC Voltage:......................................300 V
Nominal AC Voltage:..........................................100 to 240 V at 50/60 Hz
Minimum AC Voltage:........................................88 V at 50 to 60 Hz
Maximum AC Voltage:......................................265 V at 50 to 60 Hz
Voltage loss ride through:............................... 20 ms duration
POWER SUPPLY (FOR “L” DC ONLY OPTION)
Nominal DC Voltage:.........................................24 V to 48 V
Minimum DC Voltage:.......................................20 V
Maximum DC Voltage:......................................60 V
POWER CONSUMPTION
Typical: ....................................................................20 W / 40 VA
Maximum: ..............................................................34 W / 70 VA