Power Supply Module - GE D90 Plus Instruction Manual

ELECTRICAL INSTALLATION
IRIG-B port

Power supply module

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IRIG-B is a standard time code format that allows stamping of events to be synchronized
among connected devices within one millisecond. The IRIG time code formats are serial,
width-modulated codes which can be either DC level shifted or amplitude modulated (AM).
Third party equipment is available for generating the IRIG-B signal; this equipment may use
a GPS satellite system to obtain the time reference so that devices at different geographic
locations can also be synchronized.
The power supply module provides power to the relay and supplies power for dry contact
input connections. It can be connected to any of the following standard power sources.
• DC power: 110 V DC, 125 V DC, 220 V DC, or 250 V DC.
• AC power: 115 V AC or 230 V AC.
Control power supplied to the relay must be connected to the matching power supply
range of the relay. If the voltage is applied to the wrong terminals, damage can occur.
Plus
The D90 system, like almost all electronic relays, contains electrolytic capacitors. These
capacitors are well known to deteriorate over time if voltage is not applied periodically.
Deterioration can be avoided by powering up the relay at least once a year.
The power supply module provides 48 V DC power for dry contact input connections and a
critical failure relay. The critical failure relay is a form-C that will be energized once control
power is applied and the relay has successfully booted up with no critical self-test failures.
If on-going self-test diagnostic checks detect a critical failure or control power is lost, the
relay will de-energize.
Figure 23: IRIG-B connection
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION