Intelligent switchgear opening and closing time operation acc to IEC 61850

Field: Electrical Standards

China

For intelligent switchgear, the opening time is defined as the duration starting from the moment when the first message carrying the trip command (a GOOSE message in accordance with the IEC61850 series) is received through the interface, with the circuit - breaker initially in the closed position, and ending at the instant when the arcing contacts of all poles are separated.
Regarding the closing time of intelligent switchgear, it refers to the time span from the reception of the first message containing the close command (a GOOSE message following the IEC61850 series) via the interface, while the circuit - breaker is in the open position, to the moment when the contacts of all poles make contact, as illustrated in the figure.
When it comes to time measurements, it is necessary to verify the coherence between the position indication obtained via the serial interface (as shown in the figure) in the secondary system and the actual position of the intelligent switchgear.

Give a tip and encourage the author!

Topics:

Design and Simulation

Distribution Transformer

Standard

About experts

Dyson

China

Recommended

Distribution Equipment Transformer Testing, Inspection, and Maintenance

1.Transformer Maintenance and Inspection Open the low-voltage (LV) circuit breaker of the transformer under maintenance, remove the control power fuse, and hang a “Do Not Close” warning sign on the switch handle. Open the high-voltage (HV) circuit breaker of the transformer under maintenance, close the grounding switch, fully discharge the transformer, lock the HV switchgear, and hang a “Do Not Close” warning sign on the switch handle. For dry-type transformer maintenance: first clean the porcel

Oliver Watts

12/25/2025

Design Principles for Pole-Mounted Distribution Transformers

Design Principles for Pole-Mounted Distribution Transformers(1) Location and Layout PrinciplesPole-mounted transformer platforms should be located near the load center or close to critical loads, following the principle of “small capacity, multiple locations” to facilitate equipment replacement and maintenance. For residential power supply, three-phase transformers may be installed nearby based on current demand and future growth projections.(2) Capacity Selection for Three-Phase Pole-Mounted Tr

Dyson

12/25/2025

Risk Identification and Control Measures for Distribution Transformer Replacement Work

1.Electric Shock Risk Prevention and ControlAccording to typical design standards for distribution network upgrades, the distance between the transformer’s drop-out fuse and the high-voltage terminal is 1.5 meters. If a crane is used for replacement, it is often impossible to maintain the required minimum safety clearance of 2 meters between the crane boom, lifting gear, slings, wire ropes, and the 10 kV live parts, posing a severe risk of electric shock.Control Measures:Measure 1:De-energize th

James

12/25/2025

14 Measures to Improve Distribution Transformer Quality

1. Design Requirements to Improve Transformer Short-Circuit Withstand CapabilityDistribution transformers should be designed to withstand symmetrical short-circuit currents (thermal stability current) at 1.1 times the current under the most unfavorable three-phase short-circuit conditions. The peak short-circuit current (dynamic stability current) should be designed for 1.05 times the current when short-circuit occurs at the instant of zero terminal voltage (maximum peak current factor). Based o

Echo

12/24/2025