Transformers
Gas-Insulated Substations
Circuit Breakers
Disconnectors (Switches)
Instrument Transformers
Voltage Regulators
Capacitors & Reactors
Bushings, Arresters & Insulators
Digital Monitoring & Control Solutions
SF
6
-free Solutions (g
3
)
Asset Monitoring
Protection Relays
Automation & Control
Advanced Automation Systems
Substation Solutions
Communications
Automation & Protection Services
Grid Enterprise Asset Management (EAM) Solutions
HVDC Systems
FACTS
Electrical Balance of Plant
Substation Projects
Microgrids & Renewable Integration
Energy Storage Solutions
Transmission - AEMS & AMMS
Wide Area Management System
Outage Response
Geospatial Asset Management
Flexible Service Agreement
HV/MV Equipment Services
HVDC & FACTS Services
Automation & Protection Services
Software Services
Energy Consulting
Technical Training
Cybersecurity
Generation
Microgrids & Renewable Integration
Water & Wastewater
Transmission
Data Centers
Oil & Gas
Distribution
Industry & Infrastructure
Mining
Home
Products & Services
Industries
News/Events
About Us
Resources
Contact
Store
Digital Energy
Transmission
Transmission Protection
Select a typical application to view the associated one line diagram, functions,
and product order codes.
Directional Overcurrent
Directional Overcurrent - Dual Breaker
Stepped-Distance Protection
Stepped-Distance Protection - Dual Breaker
Directional Overcurrent
Typical Functions
67P
67N
25
79
V, S
Phase directional overcurrent
Neutral directional
overcurrent
Synchrocheck
Reclosing
Voltage and Power metering
Functions
Typical Product Order Code
Typical Functions
F60-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
Alternative
D30-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
HardFiber IEC 61850 Process Bus
F60-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
D30-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
Directional Overcurrent - Dual Breaker
Typical Functions
67P
67N
25
79
V, S
Phase directional overcurrent
Neutral directional
overcurrent
Synchrocheck
Reclosing
Voltage and Power metering
Functions
Typical Product Order Code
Typical Functions
D60-N02-HCH-F8L-H6P-M8L-PXX-UXX-WXX
External summation of breaker
currents (traditional method)
F60-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
D30-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
D60-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
HardFiber IEC 61850 Process Bus
F60-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
D30-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
D60-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
Stepped-Distance Protection
Typical Functions
21P
21G
67P
67N
50BF
25
79
V, S
Phase distance Ground distance Phase directional overcurrent Neutral directional overcurrent Breaker Failure Synchrocheck Reclosing Voltage and Power metering
Functions
Typical Product Order Code
Typical Functions
D30-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
Alternative Models
D60-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
D90P-AE-SS01SSS-XHXAXAXX01X
Synchrophasors
D60-N06-HCH-F8L-H6P-MXX-PXX-UXX-WXX
D90P-AE-SS01PSS-XHXAXAXX01X
HardFiber IEC 61850 Process Bus
D60-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
D30-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
Stepped-Distance Protection - Dual Breaker
Typical Functions
21P
21G
67P
67N
50BF
25
79
V, S
Phase distance
Ground distance
Phase directional overcurrent Neutral directional
overcurrent
Breaker Failure
Synchrocheck
Reclosing
Voltage and Power metering
Functions
Typical Product Order Code
Typical Functions
D60-N02-HCH-F8L-H6P-M8L-PXX-UXX-WXX
D90P-AE-SS01SSS-XHXAXAXX01X
External summation of breaker
currents (traditional method)
D30-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
D60-N00-HCH-F8L-H6P-MXX-PXX-UXX-WXX
Synchrophasors
D60-N08-HCH-F8L-H6P-M8L-PXX-UXX-WXX
D90P-AE-SS01PSS-XHXAXAXX01X
HardFiber IEC 61850 Process Bus
D60-N00-HCH-FXX-H81-MXX-PXX-UXX-WXX
Transmission Transmission Protection
