CABLE TEST BRIDGE KMK 7

Technical Data:

Resistance:
Measuring range: up to 14 kΩ (loop resistance)
CABLE TEST
Test voltage:
Measuring mode:
100 V DC; Ri = 60 kΩ
bridge measurement (auto) BRIDGE
KMK 7
Sensitivity: 0.25 µV / Bit
Rs
Resolution: 105 Technical Data:
Accuracy: 0.1 % ±1 Digit
(of measuring range)
Mutual Capacitance:
Resistance difference (WU) : Measuring range: a) 2 nF up to 2 µF (f = 77 Hz)
Measuring range: a) up to 10 % of Rs b) 200 nF up to 15 µF (f = 4.5 Hz)
b) up to 50 % of Rs Test voltage: a) f = 77 Hz; 16 Vss; Ri =100 kΩ
Test voltage: 100 V DC; Ri = 60 kΩ b) f = 4.5 Hz; 50 Vss; Ri =300 kΩ
Measuring mode: bridge measurement (auto) Resolution: a) 0.1 nF (meas. ≤ 500 nF)
Sensitivity: 0.25 µV / Bit f = 77 Hz
Resolution: Rs b) 0.5 nF (meas. ≤ 5 µF)
105
Accuracy: 0.02 % ±1 Digit (of Rs ) f = 4.5 Hz
Accuracy: 0.5 – 3 % ±1 Digit
Insulation Resistance: of measuring range
Measuring a) Test mode
modes: b) Limit indication 3/30 GΩ General Data:
c) Bridge meas. up to 100 GΩ Permissible ambient temperature:
Test voltage: a) 100 V DC; Ri = 60 kΩ Nominal operating temp.: –10 °C …+50 °C
b) 500 V DC; Ri = 300 kΩ Operating temp. limits: –15 °C … +55 °C
Accuracy 5 –15 % ±1 Digit (of measur. range) Transport and
storage temp.: –25 °C … +60 °C
Resistance discontinuity: Power Supply: a) 210 V … 250 V AC;
Measuring range: above 5 Ω (>10 % of Rs ) 50 – 60 Hz; 115 V opt.
Measurements: AC- and DC-fault location b) Internal NC-accu;
in combination 6 – 8 h cont. operation;
Accuracy: 2 % ±1 Digit (of meas. range) charging time 5 hours
(Rs > 100 Ω) c) External DC source;
12 V DC (9–15 V); P > 10 VA
Accessoires: Weight: 6.3 kg
Standard: Test leads and clips Dimensions: 340 x 180 x 270 mm
Optional: Printer, temperature sensor Housing: yellow plastic case with handle
remote switch FGK 1 Vibration and drop test: VDE 0411
Copper Cable
Test Equipment

DIN ISO 9001

Product Range : Instruments and Test Vans for Fault Location in Power and Telecommunication Networks
and for Leak Detection in Water and Sewage Networks • Cable and Pipe Locators • Seminars
SebaKMT Sales • 96148 Baunach/Germany • Phone +49 - (0) 9544 - 68 0 • Fax +49 - (0) 9544 - 2273
E-mail : sales@sebakmt.com • Internet : www.sebakmt.com

Technical data subject to change without notice. KMK 7_GB_1/00_ML_Ru

KMK 7 Data of the KMK 7
Application Main Menue Features Technical Data:
The KMK 7 is a computerized automatically balanced fault All feasible measurements and possibilities are listed in the
location bridge with integrated acceptance and series tests. “Main menue”. The individual measurements are selected by ❚ Microprocessor-controlled measurement with DC Fault Location:
The splash-proof design makes the instrument especially suit- operating the corresponding key. automatic balancing facility Measuring Murray Loop B
able for rough field use. The excellent sensitivity makes it an ❚ Indication of the test circuit, test procedure modes for Double Bridge
ideal test set for measurements on trunk and local cables. For and test results on the graphic LCD-display shorts and Three Point
acceptance tests, using the KMK 7, the insulation resistance, shunts:
loop resistance, resistance difference, mutual capacitance and ❚ Easy menu-driven operation
Measuring loop resistance up to 14 kΩ
interference voltages can be measured. The unit is specially ❚ Input of the cable temperature or range: fault resistance up to 100 MΩ
designed for easy fault location and acceptance tests. temperature measurement via test sonde
Test voltage: a) 100 V DC; (Ri = 60 kΩ)
Measurement of insulation resistance, loop resistance and DC- ❚ Storage of test results b) 500 V DC; (Ri = 300 kΩ)
fault location can be called up via special keys. All other mea-
❚ RS 232 serial link Sensitivity: 0.25 µV / Bit
surements are activated via main- and submenus. In addition
to the automatic balancing facility, the KMK 7 can also be bal- ❚ Power supply by NC-accumulator, Resolution: 10 –5 of twice the cable length
anced manually. The DC-fault location can be carried out with external 12 V DC or mains supply Accuracy: 0.1 % ±1 Digit (of cable length)
the Murray Loop B, the Double Bridge Loop and the Three
❚ Splash-proof with cover open,
Point Method. For measurements according to the “Double
waterproof with cover closed AC Fault Location:
Bridge Loop” the switching at the cable end (open and short
circuit) can be carried out automatically with the remote switch ❚ Fault location measurements as per: Measuring 200 m up to100 km
FGK 1. Measurement display – Murray Loop B range: Rmin ≥ 100 kΩ
All DC-fault location measurements are indicated as a resis- Standard cable length of 10,000 m – Double bridge method Test a) 200 m up to 10 km
tance measurement, a length measurement or as a percentage voltage: Ueff = 16 Vss; f = 77 Hz;
lx distance to the fault position – Three point method for high-
of the cable length. For cables with sections of different con- Ri = 100 kΩ
ly distance from fault position to the cable end and low ohmic shunts
ductor diameters, the cable section and the conductor diame- b) 2 km up to 100 km and
Mw average value – Resistance discontinuities loaded cables:
ter have to be entered. The KMK 7 automatically indicates the
section number and the distance to the fault from the near end. – Breaks Ueff = 50 Vss; f = 4.5 Hz;
Ri = 400 kΩ
The cable test set KMK 7 is suitable for AC- and DC-fault loca- – Loaded und unloaded cables
tion on loaded and unloaded cables. Sensitivity: 50 µV/ Bit
❚ Maintenance and series tests
Resolution: a) f = 4.5 Hz: 0.05 ‰
– insulation resistance of cable length
– conductor/pair identification b) f = 77 Hz: 0.2 ‰
of cable length
– loop resistance
Accuracy: 0.5 –1 % ± 1 Digit (of cable length)
– resistance difference
– mutual capacitance
DC Interference Voltage:
– interference voltage
Measuring up to 100 V (Re > 10 MΩ)
range:
Accuracy: 2.5 % ±1 Digit
(of measuring range)

AC Interference Voltage:
Measuring up to 60 Vss (Re > 10 MΩ)
range:
Accuracy: 5 % ±1 Digit (of measuring range)