XL-750

Timing Test & Measurement

Timing Solutions

Time & Frequency

XL-750

XL-750
GPSTime Source for Power Industry

GPS-750

Key Features

12 Channel GPS Receiver Provides a Continuous UTC Time Reference
Extremely Accurate Output Pulses and Time Codes
Electrically Isolated Outputs and Inputs

Synchronisation of SCADA System Equipment, Remote Terminal Units (RTU), Protection Relays and Power/Tariff Meters
Multiple Format RS232 Serial Time Broadcast

Symmetricom's XL-750 GPS Time Source has been developed to address key power industry timing requirements. Whether it's the monitor, control or analysis of the power system, the XL-750 is the cost-effective GPS time synchronisation solution.

The XL-750 directly meets the recent recommendations from NERC (North American Electric Reliability Council) for event timing at power substations. Specifically, it fully satisfies NERC's Recommendation # 12 concerning GPS time-synchronised recording devices.

Using GPS satellites, the XL-750 generates extremely accurate output pulses and time codes in multiple formats and offers superb timing accuracy (100nanoseconds to UTC). The XL-750 synchronises a wide variety of microprocessor-based power system equipment including: SCADA systems, remote terminal units (RTUs), protection relays, sequence of event recorders, digital fault recorders, power/tariff meters and other intelligent electronic devices (IEDs).

Field programmable using a Windows-based configuration program, the XL-750 allows the user to define time code formats, output pulses rates and durations, device status, and a wide variety of operational parameters. Each output can feed directly to different areas through electrically isolated outputs which insures reliable operation in a harsh substation environment.

The XL-750 generates a wide range of timing signals via four output ports. A fixed output provides an IRIG B amplitude modulated (AM) time code signal. Three independently configurable digital ports can provide pulse rates or unmodulated (DC level shift) time code. The XL-750 pulse output is easily configured to provide common power industry pulse rates including a 1 pulse-per-second (PPS), 1 pulse-per-minute (PPM), and 1 pulse-per-hour (PPH). Signal levels are also selectable at time of order from TTL (standard) to optional RS422, fiber optic or high voltage MOSFET switch. A RS232 serial port is provided for configuration and synchronous time string broadcasts. A dual channel event time tagging option is available for precise time tagging of external event pulses. Also available is network time server option to synchronise computers with the Network Time Protocol (NTP).

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Timing Test & Measurement