Travelling Wave Fault Locator

Power supply

Voltage range

88 - 300 VDC / VAC, 42.5 to 67.5 Hz (optional 36 - 72 VDC)

Power

20 VA

Auxiliary output

DC output 12 VDC at 750 mA

MMI

Display

Backlit LCD, 114 x 49mm - 240 x 80 dots

Keypad

7 button membrane keypad

Status

9 LEDs (healthy, alarm, trigger, clock sync, comms, status)

Line modules

TWS FL-1

Fixed format with one line module

TWS FL-8

2 line modules expandable to 8 in steps of 2

Channels

3 (one per phase) from external linear couplers - 12 bit ADC

Gain

Programmable full scale deflection

Triggering

Programmable threshold level

Sample rate

20 MHz, 10 MHz, 5 MHz, 2.5 MHz or 1.25 MHz

Diagnostics

Automatic test of channel front end to prove operation

Digital inputs

2 per line module

Wide ranging input from 48 to 250 VDC - selectable debounce

Storage

CompactFlash

4 GB allowing storage of 2100 records from 8 line modules at a sampling rate of 2.5 MHz (option for 8GB on request)

Modes

Selectable locked or cyclic buffer

Clock

Internal

Synchronized by internal GPS module (master) or via NTP over LAN and a 1 pps (slave

Accuracy

Master 100 ns. Slave 1 microsecond

Output

IRIG-B out to synchronize other IEDs

GPS antenna

Lead length

10 meters [33 feet] (optional extension leads available)

Mounting

Via 25mm [1 inch] pipe mast

Comms

Modem (optional)

Internal PSTN (V.90) modem (optional on COM 4)

Ethernet port

2 x 100 Mbits - one RJ45 for local connection at the front and one RJ45 (with option for fiber) on the rear port

USB

One port to facilitate firmware upgrade and manual download of data

Serial

3 x RS 232 provided (one front panel, two on rear). 1 x RS 485 on rear panel

Alarms

4 provided

1 (normally closed) for system healthy 3 (normally open) for lost lock, trigger and high priority trigger and fixed buffer 80% full

Configuration

iQ+ Master station

Edit configuration and view diagnostics

Web page

Access via browser - edit settings, manual trigger, view last waveform

Environmental

Temperature

Operating: -5 to +50 C [23 to 122 F]. Storage: -30 to +70 C [-22 to 158 F]

Humidity

0 to 95% non-condensing

Immunity

IEEE, EU and IEC

Conforms to relevant specifications for monitoring / control equipment in HV substations

Mechanical

Enclosure

IP 41, 19 rack-mountable

TWS FL-8

3U device - H x W x D: 132.5 mm [5.2] 487 mm [19.2] x 362.2 mm [14.3] Weight - 11 kg [24.2 lbs].

TWS FL-1

2U device - H x W x D: 90 mm [3.25] x 487 mm [19.2] x 362.2 mm [14.3]