Our OSA 5405-P substation grandmaster delivers the precise and reliable timing that utilities need to leverage new smart grid applications, including intelligent power generation, distribution and control systems. Available with rack, DIN rail and wall mounting options, this ultra-compact synchronization solution reduces cost and complexity in timing networks. The OSA 5405-P also protects mission-critical infrastructure from the risk of GNSS outages with accurate PTP grandmaster clocks and network-delivered timing.

1. Introducing the OSA 5405-P substation
grandmaster for smart grid timing
March 2021

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2
Distributed control requires tight synchronization
Power utilities need to improve their synchronization architecture
Steadily increasing timing
requirements
Outages of synchronization
networks can have a catastrophic
impact
Currently applied sync solutions
do not meet actual demand

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Synchronization accuracy requirements
• Bulk metering
• Customer premises
metering
• SCADA
• Frequency measurement
• Event recorder
• Fault localization
• Synchrophasor
measurements
1s
1ms
1µs
IRIG
NTP
PTP
IEEE C37.238 2011 and 2017 “IEEE
standard profile for use of IEEE 1588™
precision time protocol in power
system applications”
IEC PAS 61850-9-3 “Precision time
protocol profile for power utility
automation”
Power grids need a combination of all
timing technologies

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Challenges with satellite-delivered timing
• GNSS outages or temporarily
degraded signal quality
• Ionospheric disturbances
• Solar activity
• Jamming: overpowering
weak GNSS signals
• Spoofing: fake GNSS
signals
• Obstructions from new buildings
and growing trees
• Antenna construction frequently
does not achieve clear sky view
• Interference from high-
power RF transmitters
such as TV, cellular, radar
and µWave
Is GNSS your only synchronization source? You should be scared!

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Resilient PNT is a matter of national interest
Governmental requests
US executive order on
strengthening national resilience
through responsible use of
positioning, navigation, and
timing (PNT) services. Feb 2020
Many other countries have
similar directives, orders or
regulations
Solution
Galileo GPS
Robust satellite-
delivered timing
Packet
network
Atomic clock
Network-delivered
timing
The solution: combining robust GNSS receivers and network-delivered timing

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Resilient and accurate substation timing
Hybrid
substation
PTP Power
Profile
IRIG-B, NTP, 1PPS
Core
clock
ePRTC
Access
clock
Primary synchronization
Global navigation and
satellite system (GNSS)
Packet-optical
transport
Combining GNSS with network timing for accuracy and resilience
Availability: Combining
satellite- with network-
delivered timing
Synchronization interfaces:
Legacy NTP, PPS and IRIG-B as
well as latest PTP featuring
power profile
Best practices: Applying
multi-technology devices for
seamless migration and
resilient operation
Backup synchronization

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Synchronizing substations with OSA 5405-P
Combining network- and satellite-delivered synchronization
Ultra-compact grandmaster with 1GbE copper/fiber
and electrical interfaces
SyncE and PTP supporting several profiles
Multi-constellation GNSS receiver featuring
jamming and spoofing detection
Wide range of client interfaces for legacy timing
such as IRIG, PPS, as well as NTP
Powerful Ensemble Controller combines transport
and sync management with comprehensive GNSS
and sync assurance features
Multi-technology synchronization
Recorder
Teleprotection Remote terminal unit (RTU)
Protection
relay
PMU
Alarm
QOS
Substation
switch
61850 LAN
OSA 5405-P
NTP
IRIG-B
1PPS
PTP Power Profile

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OSA 5405-P substation grandmaster
Electrical and optical Ethernet interfaces, IRIG AM and
DCLS, PPS I/O, SyncE, GNSS input, PoE
Integrated GNSS receiver, PTP grandmaster, boundary
and slave clock, NTP server, multiple IRIG clocks
Up to three concurrent GNSS constellations
(GPS/GLONASS/BEIDOU/GALILEO/SBAS/QZSS)
PTP grandmaster supporting telecom, enterprise, power
and default profiles
PTP profile conversion between telecom and power
profiles
Comprehensive synchronization assurance with unique
SyncjackTM feature set
Managed by Ensemble Controller and Ensemble Sync
Director
OSA 5405-P back
OSA 5405-P front

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Supporting multiple applications
PTP
G.8265.1
PTP/NTP
enterprise
PTP
G.8275.2
PTP
G.8275.1
2G/3G/4
G/5G
FDD BS
DOCSIS
3.1/4.0
and APTS
MIFID ii
5G/LTE
TDD/LTE-A
BS and small
cells
PTP
broadcast
Studio
PTP
power
IRIG
Power utilities

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Multiple mounting options
OSA 5405-P rack mounting (dual units)
OSA 5405-P DIN mounting
OSA 5405-P wall mounting

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Summary
When timing gets tough, OSA solutions keep going
Today’s power utility timing is not accurate or
resilient enough
NTP, IRIG-B and PPS need to be augmented
for more precise timing
Backing up satellite-based with network-based
synchronization makes timing resilient
OSA 5405-P is a compact grandmaster, cost-
optimized for power stations

12. Thank you
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