Control Power - GE C30 Instruction Manual

3.2 WIRING
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 MAY
CAUTION
OCCUR!
The C30 relay, like almost all electronic relays, contains electrolytic capacitors. These capacitors are well
known to be subject to deterioration over time if voltage is not applied periodically. Deterioration can be
NOTE
avoided by powering the relays up once a year.
The power supply module can be ordered for two possible voltage ranges, with or without a redundant power option. Each
range has a dedicated input connection for proper operation. The ranges are as shown below (see the Technical specifica-
tions section of chapter 2 for additional details):
• Low (LO) range: 24 to 48 V (DC only) nominal.
3
• High (HI) range: 125 to 250 V nominal.
The power supply module provides power to the relay and supplies power for dry contact input connections.
The power supply module provides 48 V DC power for dry contact input connections and a critical failure relay (see the
Typical wiring diagram earlier). The critical failure relay is a form-C device 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 (see the Self-test errors section in chapter 7) or control power is lost, the relay will de-energize.
For high reliability systems, the C30 has a redundant option in which two C30 power supplies are placed in parallel on the
bus. If one of the power supplies become faulted, the second power supply will assume the full load of the relay without any
interruptions. Each power supply has a green LED on the front of the module to indicate it is functional. The critical fail relay
of the module will also indicate a faulted power supply.
An LED on the front of the control power module shows the status of the power supply:
LED INDICATION
CONTINUOUS ON
ON / OFF CYCLING
OFF
Switchgear
ground bus
3-12
POWER SUPPLY
OK
Failure
Failure
AC or DC
Heavy copper conductor
or braided wire
B8b B8a B6a B6b B5b
FILTER SURGE
Figure 3–13: CONTROL POWER CONNECTION
C30 Controller System
NOTE:
14 gauge stranded
wire with suitable
disconnect devices
is recommended.
+
+
–
LOW
HIGH
CONTROL
POWER
UR-series
protection system
3 HARDWARE

3.2.3 CONTROL POWER

AC or DC
+
—
OPTIONAL
ETHERNET SWITCH
827759AA.CDR
GE Multilin