Holding company ”EMZ” Head office and Factory: Free Trade Zone, Kalo Chorio,
Larnaca, Cyprus RN HE 132211; IN 9.84 Number ФПА (VAT) 10132211L
Cable Test Module ( HVT-25)
Single-phase connection to object
HVT-25 is intended for the following work performance:
· Tests of power cable lines with paper-oil insulation and operating voltage up to 25 kV; · Tests of power cable lines from XLPE with operating voltage up to 25 kV;
· Fault locating in power cables with operating voltage up to 25 kV with the use of equipment and devices for preliminary and exact location.
Laboratory performs the following functions:
1. Test of cables by the raised VLF voltage 0,1 – 0,02 Hz
2. Test of cables by the raised rectified voltage with the control of leakage current 3. Measurement of resistance of cables insulation
4. Burning of damages insulation of power cables
5. Measurement of distance to fault location in cable by pulse method and arc reflection method 6. Cable fault locating by acoustic method
7.. Cable fault locating by inductive method
A. HIPOT TEST
1. MAIN EQUIPMENT.
Laboratory equipment is provisionally subdivided into the main equipment (assembled) and additional equipment (completed). Such division allows planning buildup of laboratory functions, increasing its efficiency.
A1. DC HIPOT TEST
1.1. Equipment DC Hipot / Megohmmeter PTS- 75F(USA)
The PTS Series of Portable DC Test Sets are combination high voltage proof testers and high voltage Megohmmeters. Testing dielectric strength and insulation resistance is now served with one instrument that is designed and constructed with field
Advantages of PTS Portable DC Test Sets:
· Five range current meter with a 0-1 uA low range for Leakage Current measurements
· 10 mA output current rating for fast charging
· Resistance measurements at any output voltage
· Regulated input for accurate, reliable results (ideal for field generator use) ± 1% stability with ± 10% line change
· Ripple less than 2.5% RMS
· Internal HV shorting solenoid with discharge resistor
· Continuous Duty Operation
· Automatic transit protected meters
Rugged case with cushion grip handles and shorting stick included
A2. AC HIPOT TEST
1.2 Equipment AC Hipot VLF-4022CM(F)
TECHNICAL SPECIFICATIONS DESCRIPTION
A VLF hipot is just an AC output tester but with an output frequency of 0.1 Hz or lower rather than 50/60Hz. Although the frequency is very low, it is still an alternating current with polarity reversals every half cycle. At 0.1 Hz output, rather than 60Hz, it takes 600 times less current and power to apply an AC voltage to a capacitive load, like a long cable. There is no better way to verify the AC integrity of a cable than to hipot it with AC voltage. VLF hipots are used to provide a go/no-go, or pass/fail, voltage withstand test. It can also be used as the voltage source for diagnostic cable testing.
FEATURES
· Portable and affordable/ Simple and easy operation · True sine-wave output/ Highest load ratings available
· Waveform is independent of load capacitance between 0.01 mF and maximum load · AC testing does not degrade good cable insulation
· Harmful space charges are not injected into the cable insulation · No travelling waves are generated during testing
· Rugged and reliable design less prone to failure from transients · Much easier to service compared to units with solid state design
CONTROLLED ENERGY CAPACITOR DISCHARGE SYSTEMS SURGE GENERATOR/THUMPER
1.3. CDS-2010U DESCRIPTION
With its 20kV output, the CDS-2010U is good for fault locating cables rated up to 35kv, having a line to ground voltage of 20kV. The high burn current of 400mA can be used to condition a fault to reduce its arc over voltage to permit thumping at a lower and less damaging voltage level, yet still at full energy. The CDS-2010U can thump a cable at just 5kV yet deliver 1000 joules. Find your fault without making more. There is no better thumper. The CDS-2010U offers the complete package: three full joule output voltages, three variable hipot outputs, the
highest burn current, rapid discharge rate, tdr/radar ready, and its rugged design holds up to years of use. Another plus: all CDS Thumpers use EPR high voltage output cable rather than XLPE. EPR stays flexible in cold weather.
FEATURES
· Single piece combination Hipot, Burner and Fault Locator · Constant energy at each output voltage setting
· Variable discharge rate from 6 – 10 seconds · Motorized output voltage tap switch
· Internal Arc Reflection Filter, standard on all units · Simplified Controls for minimal operator training
· Highest burning capability, compared to other units of same size · Single pulse or continuous discharge modes
· Side mounted storage reel to hold cables and accessories · Output vise clamps for assured contact to test cable and ground · Operation from either line, generator or inverter
VERY LOW FREQUENCY TESTING (VLF)
B.1 Arc Reflection & Puls Reflection Methods
1.4.DIGITAL CABLE RADAR TDR-1669 DESCRIPTION
The Digital Cable Radar is a multi-function cable fault locator and an excellent and highly accurate portable measuring instrument to check problem and distance to events on cable. The TDR-1669 shows the continuity of characteristic impedance along the cable under test applying electrical pulses, which is ideal for checking faults (such as complete open & short, partial open & short, loose connection, broken lines etc.) on any cables which consist of at least two metallic conductors.
FEATURES
· Range up to 30km
· Adjustable pulse width from 50ns to 3µs · TFT Enhanced color Liquid Crystal Display · Two cursors for distance measurement · Real time trace display
· Trace storage capability
· RS-232 interface for computer storage & printout / CD-ROM with software for downloading -reading measurements
TECHNICAL SPECIFICATIONS
Measuring Range Continuously adjustable in 10% increments of displayed range
Pulse Width Automatic with range selection
Manual: 50ns, 100ns, 200ns, 1s, 2s, 5s, and 10s Exponential pulse shape for improved
reflections on transformers and splices Sampling Rate 100 MHz
Accuracy 1 Sample (crystal controlled)
Screen High brightness color VGA TFT LCD, 8.4” (21 cm) diagonal
Velocity of Propagation
Predefined from cable menu
Manual: 200 ft/s to 492 ft/s (61 m/s to 150m/s) Display Modes Real time mode (always visible) and stored
trace
Testing Modes TDR real time mode Distance
Measurement
Adjustable, with two vertical cursors Storage
Capability
Over 100 traces may be stored and recalled from internal disk
User Setup Measurements in feet or meters (optional) Quick startup settings, APF and Easy Mode Power Requirements 90-230V, 50/60Hz input 12V DC External (Option) Operating Temperature -20 to 40 oC Dimensions and Weight 14”w x 10.5”d x 6.25”h, 12lbs 356mm w x 267mm d x 159mm h, 5.4 kg
1.4.1 CONNECTING DEVICE AR-20 (for stabilization of electric arc)
It allows finding distance to the defect both by classic pulse, and by high voltage method with the use of pulses reflected from the arc in cable (method Arc Reflection). It gives the possibility to quickly find distance not only to the low resistance, but also to complicated high resistance faults in power cables without usage of burn down unit (in RF it got a name « non-burning method»). Connecting device is used for the application of this method (photo up right).
B.2 Induction Method
1.5. PORTABLE CABLE LOCATOR MEGGER L1070
DESCRIPTION
Capable of locating long or short ranges, inductive or conductive, active or passive, the L1070 delivers quick and accurate results with a user-friendly interface. A special design feature on the
L1070 allows the user to select and compare receiver information on two frequencies simultaneously, without having to return to the transmitter. The L1070 features push-button depth measurements up to 15 feet to quickly identify service depths prior to digging. A passive 60 Hz detection services as an excellent safety feature for identifying live underground primary and secondary utility cables. An optional ground return probe allows ground fault detection on unshielded electric services or sheath faults on telephone services through the technique of voltage gradient.
FEATURES
· Multiple transmit/receive frequencies provide accurate long or short range locates.
· Push-button depth measurements up to 4.6 m quickly identify service depths prior to digging.
· Passive 60 Hz detection serves as an excellent safety feature for identifying live underground primary and secondary utility cables.
· Passive detection also allows convenient locating of energized electric services. · High power at low frequency solves the difficult multipoint grounded utility locating
problem.
TECHNICAL SPECIFICATIONS TRANSMITTER
Operating Frequency 82 kHz, 8 kHz, 815 Hz, and BOTH (815 Hz/82 kHz) simultaneously
Indicators AC Load Resistance
Measurement, Low Bat Indicator, Low Bat warning modulated on output signal every 20 seconds
Load Matching Automatic from 5 to 2000 Ohm Output Power 815 Hz and 8 kHz 82 kHz BOTH (815 Hz/82 kHz) Normal 0.6 W High 2.0 W Normal 0.2 W High 1.0 W Normal 0.12 W + .06 W HIGH 1.33 W + 0.67 W Battery Type Disposable Eight 1.5 V D size alkaline Battery Life Disposable
Continuous
8 to 15 hours depending on load, frequency and power setting Intermittent 40 to 60 hours depending on load, frequency and power setting. 25% duty cycle average Operating Temperature Range -4° to +133° F (-20° to +55° C) Dimensions 15.2 H x 12.7 W x 40.6 L cm
Weight 3.6 kg with alkaline D cell
RECEIVER
Operating Frequency 815 Hz, 8 kHz, 82 kHz, 50/60~(PASSIVE)
Antenna Mode Null-responding vertical coil Peak-responding horizontal coil
Current Measurement Display indicated relative current simultaneously between any two selected cables for target cable verification in a multi-conductor environment Operating and Storage
Temperature Range -20° to +55° C
Battery Type Six 1.5 V C size alkaline Battery Life
Continuous
40 hours
Intermittent 82 hours
Auto power shutoff after 10 minutes of nonuse
Signal Strength Analog LCD Bargraph.
Absolute Digital Signal Strength readout from 0 to 999
Gain Control Up/Down button for automatic centering and manual control Manual Bubble-level triangulation for
verification of automatic readout in congested environments
Note Accuracy is dependent on site
conditions, nonconcentric conductor shape, number of nearby conductors, and soil return currents
Dynamic Range 126 dB
Depth Measurement Automatic
Push-button 3 digit readout to 15 ft in feet/inches, (optional meter/centimeters to 4.6 m) Dimensions 23.8 W x 9.3 W x 76.9 L cm
Weight 1.36 kg
B.3 Acoustic Method
1.6.SUPER DIRECTIONAL ACOUSTIC DETECTOR AQUATRONICS S.D.A.D
DESCRIPTION
Ease and speed of fault finding with a thumper have been greatly enhanced with the addition of the S.D.A.D. The Super DAD conveys more information about the fault location, and faster, with the addition of new microprocessor controlled electronics that provide bright, easier-to-see-and-read signals - day or night.
FEATURES
· Dual channel system designed to work with any brand thumper · Ultra-high speed clock indicates direction to the fault
· Soft coil microphones (earth probes) with tri-pod bases for hard surface location · Ballistic impulse detector visually confirms the presence of the “thump”
· Three different modes of operation: Direction-to-fault, time-based distance to fault and fault depth indication
1.7.AUTOMATIC DATA LOGGER
HVINC ADL
The ADL-1 data logger is designed to monitor, record, and wirelessly
download all test data from an HVI Very Low Frequency tester to a computer. Users now have the best of both worlds: economical and easy to use VLF testers along with full test data collection. Use a laptop on-site to watch and record the test or store all results in the ADL-1 for later downloading. Windows compatible only.
C. Electrical Safety System
1.8. System providing electrical safety of laboratory’s personnel: Module of grounding control
Module of grounding control (further MGC) is intended formonitoring of connections quality in the circuits of protective and working grounding and prohibition of switching of functional modules in case of fault in grounding circuit.
For additional control it is used a special grounding rod, which is put in the ground near the LVI. It is connected by insulated wire with terminal«AuE».
· Resistance of circuit between terminals of working and protective grounding of module MKZ (summarized resistance of wires of protective and working grounding and also places of their junctions),
which must not exceed 10 Ohm. If the value is bigger than this it is actuated a blocking relay and on the control panel the indicatorGrounding Controlblinks off;
· Potential of terminal «Protective grounding» towards the potential of control grounding rod (actually – potential of LVI body towards ground), which must not be more than 25 V. At the excess of this
potential the blocking relay is also actuated, and on the control panel the indicatorGround Potentialblinks off.
D. High Voltage Connecting Device
1.9 MAIN SWITCH
Carries out switching of CDS high-voltage outputs and Megohmmeter on high-voltage shielded cable. On the main switch there are switches automatically closing the high-voltage output to "ground" after the work is finished
1.10. BLOCKS OF CABLE DRUMS
External connections ofHVT-25 are provided with a feeding cable drum, grounding cable drum and a high voltage cable drum with a high voltage cable of 30 meters in length. At the requirement of a customer the length of cables can be increased.
Block of cable drums VD 4.137.001
- drum with feeding cable;
- drum with grounding cable with a cross-section 25 mm2, length of cable 30 m; - drum with high voltage shielded cable for rectified voltage testing up to 60 kV, the length of
cable is 30 m;
1.11 POWER GENERATOR EISEMANN 7400 DESCRIPTION
This modern petrol generator with electronic control unit is ideal for independent work on construction sites and for industrial, commercial or private operation. With a large fuel tank it guarantees up to 16 hours running time and offers excellent performance and at
the same time it is very safe to use. Isolation control with cut-off in cases of emergency and a test button ensure that the safety requirements according to civil engineering standard GW 308 are met.
It also complies with ecological standards. Reduced exhaust emission and low fuel consumption as well as its very silent operation make it a highly efficient generator.
TECHNICAL SPECIFICATIONS
Engine Honda GX 390 Super Silent
Cylinder 1
Speed 3000 rpm
Fuel Petrol
Engine capacity 1.3 l
Cooling (Engine/Generator) Air / Air Electr. capacity 3~ φ 1.0 6000VA Electr. capacity 1~ φ 1.0 5000VA
Voltage 3~ 400V
Voltage 1~ 230V
Max. Current 3~ 9A
Max. Current 1~ 22,5A
Current 1~ (CEE) 22,5A
Current 1~ (Schuko) 16A Max. starting current cos φ 0,6 16A Starting current with 20%
voltage drop 40A Frequency 50hz Protection IP 54 Tank capacity 20 I Weight 108 kg
Weight including battery 117 kg
Dimensions (L x W x H) 740x500x350 mm Acoustic power LWA 98 dB(A)
E. VEHICLE
2.CHASSIS.Chassis of any car manufacturers are applied:
2.1 Vehicle body.The vehicle body is divided into two compartments: a high-voltage compartment and an operator compartment. High-voltage transformers, cable drums and other functional equipment are placed in the high-voltage compartment. There are also two tool cases for regular tools and accessories. Measuring and control devices, managing system for testing process are placed in the operator compartment. Here are also an operator table, chest for devices and tools necessary for the operator during working.
In the operator compartmentthere are control panels for high-voltage testing, and also an armchair for the operator, devices and tools chests and shelves for the documentation.
In the high-voltage compartmentthere are 3-phase main switching control panel HVS-60/3, the high-voltage block of cables CDS-2010, the cable drums and ets.
View to the operator compartment of the laboratory HVT-25
The laboratory has the following main distinctive features:
· The equipment is mounted in the noise and heat insulated vehicle body from plastic-glass sandwich panels with foam filler. This creates a comfort work conditions for the operator both in cold and hot climate.
· In the operator compartment it is mounted a working table of Eurodesk type which creates comfort conditions for measurements and their further processing and registration.
· In order not to touch the conducting parts the special partition separates the operator compartment from the high voltage compartment.
· The partition separates and working table of Eurodesk type from the high voltage compartment.
· Leading out of cables to the object is done through the special cable outlet hatch.
F. Documents
3. Technical documentation:
1. Operating Manual
2. Circuit Schematic Manual 3. Test – calibration reports
G. Warranty & Service
4. Warranty:
Warranty period 12 month. All spare parts will provide for 10 years.
H. Contacts
5. Contacts:
Please send your requests by e-mail:
[email protected];[email protected];[email protected] or by phone/fax: +357 24 821788 / +357 24 821787
