1. Introduction:

GWOL-668 overhead line fault location system used for 6-35kV overhead line grounding points accuracy pinpointing for the low resistance fault, high resistance, ARC grounding fault.

With whole set, we offer complete solution method for the overhead line grounding fault. Includes function of :

l Line parameter measurement: to test the line parameters and give suggested testing method

l AC low resistance grounding fault location: to solve 70% -80% grounding fault with a more effect method of no need to climb the poles

l DC high resistance grounding fault location: to solve high resistance fault point pinpointing problem that other brands can’t do

l ARC grounding fault pinpointing: first time to solve such type fault pinpointing problem, such as fault from the insulator crack

l Space sector method: if small current grounding system, the system allow system run in two hours after fault, our device can do fault location when line running

l DC voltage withstanding function to check line status after maintain

The whole set includes transmitter, receiver, space magnetic filed sensor and accessories. The transmitter has built-in high capacity Lithium batteries.

2. Feather

l Used for grounding fault pinpointing of 6-35kV overhead line small current system.

l Whole function of Integrated fault diagnosis, AC location, DC location, AC voltage withstanding, DC voltage withstanding five functions.

l fault diagnosis:

ü Instructs appropriate positioning methods.

ü Line insulation resistance, capacitance measurement.

l AC pinpointing -direct connection ( low transition resistance grounding )

ü Transmitted signal: high power special low frequency AC signal active injection.

ü Receive signal: search along the section, without the need to hook up the sensor.

ü Efficient work: no need to climb the pole, greatly improve the test efficiency, reduce the work intensity.

l AC pinpointing -external booster output ( There is grounding PT, medium transition resistance grounding)

ü Transmitted signal: high power special low frequency AC signal active injection.

ü Receive signal: along the section search, need to mount the rod to connect the sensor.

ü No need to remove the line grounding PT.

l Innovative resistance current content and current amplitude ratio, to solve a wider range of faultsDC pinpointing ( line stop running ,with high /low transition resistance grounding and ARC grounding)

ü Transmitted signal: active injection of high-power pulsating DC signal.

ü Receive signal: along the section search, need to mount the rod to connect the sensor.

ü All-around positioning mode, especially to solve the problem of arc grounding positioning.

l The transmitter has automatic discharge stop function to ensure safe operation.

l The transmitter has over current protection and over temperature protection functions.

l Large capacity lithium-ion battery pack is built in the transmitter, easy to carry.

l Receiver sampling is fully digitized with high sensitivity signal processing, and the criterion is clear and intuitive.

l With data memory function, no loss of power off, more convenient to pinpoint.

l Using temperature -10℃-50℃,humidity <80%RH, elevation<1000m

3. Tech. Specification

l Transmitter:

• Receiver and hanging sensor