GE C30 User Manual

5-56 C30 Controller System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
The relay contains a real time clock (RTC) to create timestamps for communications protocols as well as for historical data,
such as event records and oscillography. When the relay restarts, the RTC initializes from an onboard battery-backed
clock, which has the same accuracy as an electronic watch, approximately ±1 minute per month (~23 ppm). Once the RTC
is synchronized with the Precision Time Protocol (PTP), IRIG-B, or SNTP, its accuracy approaches that of the synchroniz-
ing time delivered to the relay.
The
SYNCHRONIZING SOURCE setting configures the priority sequence that the relay uses to determine which of the avail-
able external time sources synchronizes the RTC and the synchrophasor clock. A setting of None causes the RTC and the
synchrophasor clock to free-run. A setting of PP/IRIGB/PTP/SNTP, IRIGB/PP/PTP/SNTP, or PP/PTP/IRIGB/SNTP causes
the relay to track the first source named that is enabled and operational, or free-run if none of these are available. Here, PP
means a time source that is strictly compliant with PP, PTP means a time source that is not strictly compliant with PP. When
a time source fails or recovers, the relay automatically transfers synchronization as required by this setting.
See the
COMMANDS SET DATE AND TIME menu section of this manual to manually set the RTC.
The REAL TIME CLOCK EVENTS setting allows changes to the date and/or time to be captured in the event record. The event
records the RTC time before the adjustment.
To enable IRIG-B synchronization, the input IRIG-B SIGNAL TYPE must be set to DC Shift or Amplitude Modulated. IRIG-B
synchronization can be disabled by making this setting None.
To configure and enable PTP and/or SNTP, or to set local time parameters (for example time zone, daylight savings), use
the following sections.
b) PRECISION TIME PROTOCOL (1588)
PATH: SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)
PATH: SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)  PTP PORT 1(3)
The UR supports the Precision Time Protocol (PTP) specified in IEEE Std 1588 2008 using the Power Profile (PP) specified
in IEEE Std C37.238 2011. This enables the relay to synchronize to the international time standard over an Ethernet net-
work that implements PP.
The relay can be configured to operate on some PTP networks that are not strictly PP. Time accuracy can be less than
specified for a PP network. Tolerated deviations from strict PP include 1) missing declaration of PP compliance in the mes-
sages, 2) connection to a network device that does not support the PTP peer delay mechanism, 3) jitter substantially
greater than 1 µs in received event messages, and 4) certain non-compliant announce and sync message update rates.
The relay implements PTP according to IEEE Std 1588 2008 and the equivalent IEC 61588:2009(E), sometimes
referred to as version 2 PTP. It does not support the previous version of the standard (version 1).
 PRECISION TIME
 PROTOCOL (1588)
STRICT POWER PROFILE:
Disabled
Range: Enabled, Disabled
MESSAGE
PTP DOMAIN NUMBER
0
Range: 0 to 255
MESSAGE
PTP VLAN PRIORITY
4
Range: 0 to 7
PTP VLAN ID
0
Range: 0 to 4095
MESSAGE
 PTP PORT 1

MESSAGE
PORT 1 PTP FUNCTION:
Disabled
Range: Enabled, Disabled
MESSAGE
PORT 1 PATH DELAY
ADDER: 00000 ns
Range: 0 to 60 000 ns in steps of 1
MESSAGE
PORT 1 PATH DELAY
ASYMMETRY: 0000 ns
Range: –1 000 to +1 000 ns in steps of 1
NOTE

GE C30 Specifications

General

Brand	GE
Model	C30
Category	Controller
Language	English