LS 4

The LS 4 offers a simple solution for complex switchgear applications. The LS 4 has the ability to operate with up to 14 GCP-31 genset controls and 8 LS 4 circuit breaker controllers.
A two line LC display shows the configured names of the analog measuring inputs.
Each controlled breaker is equipped with one LS 4 that measures the three-phase voltage on either side of the breaker (phase angle configurable). Each side of the breaker is designated as either a fixed (utility) or variable (genset) source. This permits the LS 4 to control utility feeder breakers with one fixed source and one variable source, or tie breakers between busses with two variable sources. The LS 4 is used for breaker protection, synchronization, and load control.

View LS 4 H connection application
View LS 4 double H connection application
View LS 4 H multiple incomings application

Product Features:

• True RMS voltage (A and B side)
• True RMS current (A side)
• Synch-check functionality
• Dead bus start functionality
• Synchronous networks functionality
• Remote control of frequency, voltage, and real power
• Zero power transfer control (softload)
• Configurable trip/control set points
• Config. delays for each alarm
• 7 configurable relay outputs
• Two-line LC display
• Synchronization over transformer possible
• CAN bus communication

Protection Functions:

• Overvoltage (ANSI #59)
• Undervoltage (ANSI #27)
• Overfrequency (ANSI #81O)
• Underfrequency (ANSI #81U)
• Phase/vector shift (ANSI #78)
• df/dt ROCOF (rate of change of frequency) (ANSI #81RL)

Certifications / registrations: UL/cUL, CE

Download Product Specs:

English

Japanese

Russian

Chinese

Download Product Manuals:

English Manual

German Manual

Download Application Notes:

Using the proconX MGATE Ethernet Communication Gateway

Download LeoPC1 Configuration Files:

P/N 8440-1032

P/N 8440-1031

P/N 8440-1030

P/N 8440-1006

Refer to the configuration files download page for other P/Ns

Download LeoPC1 Configuration Program

Please refer to the Woodward Worldwide Directory and contact your local sales office for questions about pricing and delivery or product support.

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Note: Information contained herein is intended for and appropriate to the purposes of this publication. Woodward reserves the right to update or otherwise revise any portion of this publication at any time. Technical data and detailed information is available in Woodward product specs. Specific reliance should be given only to information contained in purchase order(s), other contractual document(s), or information otherwise expressly represented in writing by Woodward as correct and accurate for the specific facts, circumstances and applications.