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G&W’s Lazer distirbution automation system is a pre-engineered control package that works in conjunction with power distribution switchgear to perform automatic switching operations on overhead and underground loop distribution circuits. G&W utilizes over 100 years of industry experience to match the proper switchgear with the proper control for the application. Lazer solutions typically utilize Schweitzer Engineering Laboratories controls, one of the industry’s most respected suppliers of quality protective relays.
Lazer is a protection and control package that features one or more protective relays, equipped with distributed capabilities and peer-to-peer communication to make intelligent operating decisions and to monitor field conditions. Lazer focuses on critical load installations to maximize service reliability.
G&W’s Lazer automation system specifically addresses fault detection, isolation and restoration (FDIR) requirements. It continuously monitors the circuit. When it senses an electrical overload or short-circuit fault within its protection zone, it will issue a command to the appropriate switchgear to trip-open within a pre-determined time delay based on the severity of the fault.
Communication with other upstream and downstream Lazer devices functions continually to determine what other actions are required to re-configure the circuits to automatically restore power to customers connected to the unfaulted lines. The entire process from fault detection to system restoration can typically be completed within 60 seconds or less.
Communications
Flexible communication and open protocols are critical for integrating to existing Smart Grids and expanding to handle future needs. Lazer solutions offer flexible communication using hardwired connections, fiber optic cable, or a range of wireless technologies on RS232, RS485, and Ethernet ports. Some of the different protocols available are:
- DNP3.0
- SEL Mirrored Bits (proprietary)
- IEC61850 with GOOSE messaging
Project Examples
- Distributed automatic transfer including reclosers and SEL-451 controls over fiber optic cable.
- Open Loop FDIR including reclosers and SEL-3351 over radio.
- Load Calculating Restoration including switches, SEL-451-4s and SEL-3351 over fiber optic.
- Open Loop Upgrade including switches, SEL-451 and SEL-751A over fiber optic.
- High Speed Single Phase Tripping Closed Loop including reclosers and SEL-651R over fiber optic cable.
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