GE 745 - M Iscellaneous

2–10 745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS CHAPTER 2: OVERVIEW
2.2.5 Miscellaneous
COMMUNICATIONS
All ports:..............................................................300 to 19200 baud, programmable parity, Modbus RTU
protocol, DNP
Ethernet: .............................................................With order code T only,
10Base-T RJ45 connector,
Modbus TCP/IP
Version 2.0 / IEEE 802.3
RS232:..................................................................Front panel,
9-pin D connector
RS485/RS422 (COM1)....................................Back panel
RS485 second port (COM2)........................Back panel, with order code E only.
CLOCK
Resolution: .........................................................1 ms
Accuracy.............................................................±1 ms with IRIG-B
±1 minute/month without IRIG-B
Supercap backup life:...................................45 days when control power is off
HARMONICS
Range:..................................................................0.00 to 99.9%
Accuracy:...............................................±1% of full-scale at 0.5 × CT
THD
Range:..................................................................0.00 to 99.9%
Accuracy:...........................................................±1% of full-scale at 0.5 × CT
EVENT RECORDER
Number of events: .........................................256
Event content:..................................................see Types and causes of events on page 6–19
OPERATING ENVIRONMENT
Operating temperature:.............................. –40°C to +60°C
Storage temperature:...................................–40°C to +80°C ambient
Humidity:............................................................up to 90% non-condensing
Altitude:...............................................................2000 m
Pollution degree:.............................................II
CASE
Drawout:.............................................................Fully drawout unit (automatic CT shorts)
Voltage Break Maximum load
DC resistive 30 V DC 10 A 300 W
125 V DC 0.5 A 62.5 W
250 V DC 0.3 A 75 W
DC inductive
L/R = 40 ms
30 V DC 5 A 150 W
125 V DC 0.25 A 31.3 W
250 V DC 0.15 A 37.5 W
AC resistive 120 V AC 10 A 2770 VA
240 V AC 10 A 2770 VA
AC inductive
PF = 0.4
120 V AC 4 A 480 VA
240 V AC 3 A 750 VA