How to connect the MT3x0 to the test circuit and electricity meter.
How to use AC-current clamps safely.
How to disconnect the MT3x0 from the test circuit and electricity
meter. How to use AC-current clamps safely.
• Mains supply should always be connected properly and never disconnected when the device is linked to
the test circuit.
• First connect the neutral cable and afterwards other voltage cables. Connect all cables properly.
• First connect the socket to the instrument and afterwards to the current carrying conductor (cable)/circuit.
• Take always care of safety against electrical shock.
• The operator should read the manual and be well-known with equipment and detail safety instructions.
•
•
•
•
•
•
Disconnect the device from the mains after removal of test voltage and clamps from the test circuit.
First remove the phase voltage cables and afterwards the neutral cable.
First remove the AC-current clamps from the test circuit and afterwards the socket from the device.
Take always care of safety against electrical shock.
The operator should read the manual and be well-known with equipment and detail safety instructions.
All accessoiries should be packed properly to avoid mechanical damages.
Scanning
head
Remove the scanning head
1. Connect the socket of the
1. from the meter under test and
1.
current clamps to the MT3x0.
Not to the test circuit!
ZERA
1.
LED
disconnect the scanning head
cable from the MT3x0.
2. Connect the test voltage
1 2
circuit to the UN, U1, U2* and
U3 * of the MT3x0.
Not to the test circuit!
2.
Remove the test voltage
cables U1, U2*, U3* and UN
from the meter under test.
Not from the MT3x0!
3
4
5
6
7
8
9 10 11 12
2.
L1
L2
L3
3.
3. Connect the mains power
supply of the MT3x0.
First to the mains,
afterwards to the MT3x0!
2.
3.
Remove the AC-current
3. clamps from the current
Mains
supply
circuit.
Not from the MT3x0!
Scanning
head
ZERA
LED
4. Connect the voltage cable to
Use only cables of
category IV for MT310-01!
Remove the mains power
the meter under test.
1 2
3
4
5
6
7
8
9 10 11 12
4.
First from the MT3x0,
afterwards from the mains!
4.
5. Connect the AC-current
clamps to the current circuit.
Ensure the correct current
flow direction and tight
connection of the jaws.
4. supply cable from the MT3x0.
L1
Mains
supply
L3
L2
5.
Remove the test voltage
5. cables U , U *, U * and U
1
2
3
N
from the MT3x0.
5.
Scanning
head
6. Mount the scanning head on
7.
ZERA
6.
6. Remove the AC-current clamp
LED
the meter under test. First
connect the scanning head
cable to the MT3x0 and then
to the scanning head.
plug from the MT3x0.
6.
Scanning
head
* in case of three phase network
ZERA
LED
* in case of three phase network
7.
ZERA GmbH | Hauptstr. 392 | D-53639 Königswinter | Germany | Tel: +49 (0) 2332 704-0 | Fax: +49 (0) 2332 704 70
ZERA GmbH | Hauptstr. 392 | D-53639 Königswinter | Germany | Tel: +49 (0) 2332 704-0 | Fax: +49 (0) 2332 704 70
How to connect the MT3x0 to the test circuit and electricity meter.
How to use „Direct mode“ safely.
How to disconnect the MT3x0 to the test circuit and electricity
meter. How to use „Direct mode“ safely.
• Do not disconnect mains supply from the device while connected to the test circuit.
• Never open the secondary side of the external CT while making current connection. CT secondary open will
cause high voltage, damage to equipment and danger of life of the operator.
• First connect the neutral cable afterwards other voltage cables. Connect all cables properly.
• Take always care of safety against electrical shock and properties of CT/VT.
• The operator should read the manual and be well-known with equipment and detail safety instructions.
1. Connect the current cables to
the MT3x0.
Not to the test circuit!
• Ensure that the secondary side of the external CT is not open while removing the current connection.
CT secondary open will cause high voltage, damage to the equipment and danger of life of the operator.
• Disconnect the device from power supply after removal of test voltage and clamps from test circuit.
• First remove the phase voltage cables afterwards the neutral cable.
• Take always care of safety against electrical shock and properties of CT/VT.
• The operator should read the manual and be well-known with equipment and detail safety instructions.
• All accessoiries should be packed properly to avoid mechanical damages.
1.
Scanning
head
Remove the scanning head
Use only cables
of category IV
for MT310-01!
1. from the meter under test and
ZERA
disconnect the scanning head
cable from the MT3x0.
2. Connect the test voltage cir-
LED
1.
cuit to the UN, U1, U2* and U3*
of the MT3x0.
Not to the test circuit!
Scanning
head
ZERA
LED
3.
2.
Remove the test voltage
2. cables U , U *, U * and U
1
2
3
N
3. Connect the mains power
supply of the MT3x0.
First to the mains,
afterwards to the MT3x0!
Mains
supply
1 2
from the meter under test.
Not from the MT3x0!
Scanning
head
ZERA
3
4
5
6
7
8
9 10 11 12
2.
LED
Short circuit the CT at the se-
4.
4. Connect the current cables to
the test current circuit.
Ensure the CTs are never
open at the secondary side
in any case!
1 2
3
4
5
6
7
8
9 10 11 12
MT3x0
External CT
3. condary side and afterwards
remove the current cables
from the current circuit.
Not from the MT3x0!
Reconnect the meter under
test to the secondary side of
the CT!
Scanning
head
ZERA
LED
3.
1 2
3
4
5
6
7
8
9 10 11 12
Scanning
head
5. Connect the voltage cable to
ZERA
the meter under test.
LED
External CT
Remove the mains power
6. Mount the scanning head on
7.
the meter under test. First
connect the scanning head
cable to the MT3x0 and then
to the scanning head.
1 2
3
4
5
6
7
8
9 10 11 12
5.
4. supply cable from the MT3x0.
First from the MT3x0,
afterwards from the mains!
4.
Scanning
head
6.
5.
ZERA
LED
Remove the voltage and cur-
5. rent cables from the MT3x0.
* in case of three phase network
7.
ZERA GmbH | Hauptstr. 392 | D-53639 Königswinter | Germany | Tel: +49 (0) 2332 704-0 | Fax: +49 (0) 2332 704 70
* in case of three phase network
ZERA GmbH | Hauptstr. 392 | D-53639 Königswinter | Germany | Tel: +49 (0) 2332 704-0 | Fax: +49 (0) 2332 704 70