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6

GMC-I Messtechnik GmbH

Legend

rdg. = of reading

1)

Do not operate the clip-on transformer continuously without load.

Influence Error
Frequency f

min

f

max

3% rdg.

1.5% rdg. 

1 mA

3% rdg. 

0.2 mA

2.5% rdg. 

1 mA

2% rdg. 

10 mA

2% rdg. 

1 mA

3% rdg. 

0.2 mA

2% rdg.

0.1 A

2% rdg.

0.1 A

Influence Error 
Temperature 

/10 K (typ.)

3% rdg.

1.5% rdg.

3% rdg.

2.5% rdg.

2% rdg.

2% rdg.

3% rdg.

Typical 
Phase An-
gle Error

45

65 Hz

f

min

f

max

not defined

3

10

not defined

3

10

2

10

2

15

not defined

3

10

3

10

Max. 
Overload

cont.
dyn.< 1s

360 A
900 A

200 A
500 A

300 A
750 A

300 A
750 A

300 A
750 A

30 A
75 A

300 A
750 A

Open-Circuit Voltage

max. 15 V 

1)

max. 15 V

max. 27 V

max. 27 V 

1)

max. 27 V

max. 27 V

max. 27 V

Type

WZ12A

WZ12B

WZ12C

WZ12D

WZ12E

WZ12F

Clip 0100S

Summary of Contents for WZ12A

Page 1: ...WZ12A F Clip 0100S 3 349 016 02 9 10 18 Operating Instructions E ...

Page 2: ...onduc tor to 400 V phase to phase in 4 wire 3 phase systems or to 500 V phase to phase in 3 wire 3 phase systems An open secondary circuit at the WZ12A or WZ12D may lead to dangerous secondary voltages and to the destruction of the secondary coil Make absolutely cer tain that the secondary circuit is always connected to the measuring circuit at the measuring or recording instru ment first The seco...

Page 3: ...www gossenmetrawatt com 2 General Description The WZ12 current transformer allows for the interruption free measurement of alternating current within various measuring ranges from 1 mA to 180 A by enclosing the electrical conductor The WZ12A basic model has been designed for general current measurements in electrical circuits of greater than 15 A Its low price and compact dimensions make it an att...

Page 4: ... D probes are equipped with a current output and are connected to the current measurement inputs e g 300 mA Before closing the probe around the current con ducting cable check the secondary circuit as well as the measurement input at the measuring instrument with an ohmmeter if necessary Neither circuit may be interrupted Do not enclose the primary conductor with the clip until after this test has...

Page 5: ...A 1 A 150 A Frequency Range 45 65 400 Hz 45 65 500 Hz 45 65 400 Hz 45 65 500 Hz 30 45 65 500 Hz 30 45 65 500 Hz 45 65 500 Hz Transformation Ratio 1000 1 100 mA A 100 mV A 1 mV mA 1000 1 100 mA A 10 mV A 100 mV A 1 mV mA 1 mV A 1mV A Output Burden Load 5 1 M 1 M 50 10 k 11 13 k 1 M 10 k 10 k Intrinsic Uncertainty under Reference Conditions 3 rdg 1 5 rdg 1 mA 3 rdg 0 2 mA 2 5 rdg 1 mA 2 rdg 10 mA 2 ...

Page 6: ...g 0 1 A Influence Error Temperature 10 K typ 3 rdg 1 5 rdg 3 rdg 2 5 rdg 2 rdg 2 rdg 3 rdg Typical Phase An gle Error 45 65 Hz fmin fmax not defined 3 10 not defined 3 10 2 10 2 15 not defined 3 10 3 10 Max Overload cont dyn 1s 360 A 900 A 200 A 500 A 300 A 750 A 300 A 750 A 300 A 750 A 30 A 75 A 300 A 750 A Open Circuit Voltage max 15 V 1 max 15 V max 27 V max 27 V 1 max 27 V max 27 V max 27 V Ty...

Page 7: ...0 V Pollution degree 2 Test Voltage 3 7 kV AC 1 min Ambient Conditions Operating Temperature 10 C 40 C Storage Temperature 20 C 70 C Electromagnetic Compatibility Emission EN 61326 1 Immunity EN 61326 1 Mechanical Design Dimensions 40 mm x 26 mm x 120 mm Jaw Opening 15 mm Housing Material Plastic Novodur Color anthracite Connector Cable Length approx 120 cm Protection IP40 WZ12A F with contact pro...

Page 8: ... basis Remove contamination and dust from the plastic components and connector cables with a cloth which has been dampened with soapy water Mea sure the resistance at the secondary circuit with an ohm meter on a regular basis If loose contacts become appar ent remove the clip on current transformer from service 6 Repair and Replacement Parts Service Calibration Center and Rental Instrument Service...

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