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NAVIGATOR-LM HV

The NAVIGATOR short-circuit indicator is an electronic device which is designed for medium voltage utility overhead lines.

Overhead Faulted Indicator

Product Features

  • LED indication with 360 degrees of visibility
  • Battery status indication
  • Double-flashing mode upon detection of a second fault
  • Reset depending on type: manual, Current restoration, timed, on restoration of voltage
  • Mounting can be performed while equipment is energized
  • NAVIGATOR-LM HV: permissible voltage ≤161 kV

The NAVIGATOR short-circuit indicator is an electronic device which is designed for medium voltage utility overhead lines.
The indicator is provided with a self-adjusting load-dependent control of the trip current level. This function allows the indicator to continuously sample the load current on overhead lines and electronically set a corresponding trip value for fault detection as a function of the load current. The maximum load current sampled by the indicator, is kept in a memory for a period of at least 72 hours. Thus, the indicator is most favourably adapted to the network to be monitored, even if low load is currently present.

The indicator is provided with a built-in battery control. When the battery capacity decreases from a total indicating time of 400 hours to a residual time of 50 hours, the yellow LED of the display starts flashing for a period of 6 months. The NAVIGATOR-LM differentiates between two subsequent short-circuit detections. Upon the detection of a first short-circuit, the LED indicator light starts flashing at equal rates. The detection of a second short-circuit (e. g. after ARC) switches the LED to double flashing mode.


Product

Note Item Number

Version A

Faults are indicated by means of 6 high-intensity LEDs. The indication is reset automatically on restoration of current or after expiry of a preset time, or can be reset manually, whichever criterion occurs first.

Item Number41-2108-111

Version B

Faults are indicated by 6 high-intensity LEDs. The indication is reset automatically after expiry of a preset time, or manually.

Item Number41-2108-211

Version C

Faults are indicated by means of 4 red LEDs and 2 yellow high-intensity LEDs. The red LED indicator lights are reset automatically on restoration of current, after expiry of a preset time, or manually. The yellow LED indicator lights are reset automatically after expiry of a preset time, or manually.

Item Number41-2108-311

Version E

The indicator samples both the line current and line voltage on the line. The device is tripped only if the line has been under voltage for at least 60 seconds. Automatic reset after 60 seconds upon restoration of voltage, after passage of a preset time, or manual reset. Its design blocks high inrush currents for indication, even upon reclosure. Both the Overbuilt and Underbuilt conditions shall be avoided!

Item Number41-2108-511


Technical Data

Technical Data

NAVIGATOR-LM HV

Trip current range

200 A/100 ms, load-dependent self-adjustment (see Current/Time Characteristic)

Accuracy

±10 % at 20 °C

Self-adjustment

Load current ≥50 A

Trip factor

4 – 6 times the load current (see current/time characteristic)

Adjustment delay

Load current flow time ≥50 s

Holding time of self-adjustment

72 h

Indications
(short circuit/earth fault)

▪ 4 red LEDs (>5,000 mcd or 7,000 mLm per pc.)

▪ 2 yellow LEDs

Visibility

>50 m during daytime, >150 m during night /360 degrees of visibility

Flash rate

30 flashes per minute, total indication time >500 h

Rweset

▪ Manual reset by means of a permanent magnet

▪ Automatic time reset: 4 h ±10 % (2 or 8 h)

Version A and Version C: Current restoration load current >3 A
Version E: Voltage restoration, line voltage ≥5 kV

Power supply

Lithium cells, replaceable, lifetime ≥20 years

Battery check

1 yellow LED, flash rate: 6 per minute, 0.5 years

Max. permissible voltage

≤161 kV/50 Hz or 60 Hz

Withstand Current

40 kA/1 s

Cable diameter range

13 – 36 mm

Influence

No influence by vicinal power lines with a horizontal distance of at least 250 mm from the indicator

Housing

UV-resistant polycarbonate/polyamide, IP68
Clamping mechanism: stainless steel

Temperature range

-30 to +70 °C (ANSI Test -40 to +85 °C)

Accessories

Other

Magnet (test and reset)

more...
49-6001-002

Hot Stick

Hot Stick with hook

for applications in dry weather conditions
20 kV, 30 kV, 46 kV

more...
65-0301-xxx
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