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12

Connecting the meter

 DANGER!

Risk of fatal injury in case of contact with live parts!

During installation or when replacing the meter, the wires connected to 

the meter must be de-energised.

 

y

Remove the corresponding pre-fuses and store them in a secure 

location to ensure that no-one else can insert the pre-fuses again 

without being noticed.

 

y

If you use selective automatic circuit breakers for system discon-

nection, secure them to prevent them from being switched-on again 

without being noticed.

 

y

Before the installation of a meter, make sure that the consequences 

of disconnecting the electrical system will not result in immediate 

danger to the life or health of persons or cause any economic 

damage.

 

y

To avoid any immediate hazards or damage, take appropriate 

measures to prevent malfunctions before disconnection of the 

system.

 

y

Do not use the internal disconnection relay as a load disconnecting 

switch when disconnecting electrical systems.

 

y

Use the specified screw-type terminals only for installation and 

connection of the meter.

 

y

Route the connection cables in the vicinity of the meter connection 

terminals in such a way that they are not kinked or jammed when 

the terminal cover is fitted into place.

 DANGER!

Risk of fatal injury due to arcing and electric shock!

The voltage taps in the meter are not fuse-protected, and are connect-

ed directly to the main voltage.

 

y

External devices that are operated using the meter’s voltage taps 

must be fuse-protected with a pre-fuse of ≤ 0.5 A in accordance with 

the applicable technical regulations.

Summary of Contents for NXT4

Page 1: ...Version November 2020 Subject to technical changes Scope of delivery 2 Important information 2 Target group 2 Intended use 2 Maintenance and warranty instructions 3 Care and disposal information 3 Bas...

Page 2: ...in may not be applicable for your particular device More comprehensive information about the device is available in the product manual Please also observe all the documents included with other compone...

Page 3: ...to be treated at the end of their life cycle Components Waste collection and disposal Printed circuit boards Electronic waste Dispose of such waste in accordance with the local regulations LEDs LC di...

Page 4: ...mage or other externally visible damage y Only use the device if it is in a technically flawless state and solely in line with its intended use y The connection cables used to connect a meter must be...

Page 5: ...range 25 C 55 C Limit for operation 40 C 70 C Limit for storage and transport 40 C 70 C Humidity Maximum 95 non condensing as per EN 62052 11 EN 50470 1 and EN 60068 2 30 Protection class II Degree o...

Page 6: ...Reset button sealable 3 Call up button 4 Optical data interface D0 optical call up button left 5 Test LEDs 6 Space for transformer plate for transformer connected meters only 7 Terminal cover sealable...

Page 7: ...ment of inputs and outputs interfaces 8 Information about connection to meter connection diagram 9 Temperature class as per EN 60721 3 3 10 Conformity and certification marking 11 Safety and applicati...

Page 8: ...ry or the internal power reserve of the real time clock Full power the real time clock is buffered in this instance Power reserve run down readout battery is empty or not available In this instance th...

Page 9: ...the meter The arrows indicate which tariff and maximum meter are active and how the meter is being controlled clock or ripple control receiver T1 T4 Tariff information for energy All activatable tari...

Page 10: ...p The meter can be wall mounted as per DIN 43857 2 The following figures show the relevant dimensions for mounting the meter depending on the model involved Mounting the meter a Meter with short termi...

Page 11: ...11 b Meter with long terminal cover Dimensions in mm c Meter with VARIOMOD NXT meter modem Dimensions in mm...

Page 12: ...s or cause any economic damage y To avoid any immediate hazards or damage take appropriate measures to prevent malfunctions before disconnection of the system y Do not use the internal disconnection r...

Page 13: ...cordance with the applicable technical regulations ATTENTION Application of excessive torque will damage the connection terminals The appropriate torque is dependent on the type of connection line inv...

Page 14: ...using a pre fuse with 6 A y The current paths must be fuse protected as per the current specifi cations on the meter s name plate in accordance with the applicable technical regulations DANGER Risk of...

Page 15: ...dimensions W x H mm 5 3 x 5 5 2 6 x 2 2 Minimum connection cross sections mm 2 5 1 0 Maximum connection cross sections mm 10 0 2 5 Maximum torques Nm 1 5 Screw type Screw with washer assembly with slo...

Page 16: ...and parameters of the supply side overcurrent protection devices with the maximum rated currents as well as the rated consumption category of the meter system for directly connected meters y The conne...

Page 17: ...ecting paths must be fuse protected as per the applicable technical regulations and in accordance with the current specifica tion on the meter s name plate y The installer bears responsibility for coo...

Page 18: ...x 2 2 Minimum connection cross sections mm 2 5 1 0 Maximum connection cross sections mm 35 0 2 5 Maximum torques Nm 3 5 Screw type Screw with washer assembly with slot and Pozidriv PZ2 drive Spring l...

Page 19: ...r self ignite y Never short circuit damage heat or force open batteries In delivery condition the battery function is inactive 1 Remove the battery from the holder in the terminal cover 2 Turn the bat...

Page 20: ...tection LC Liquid Crystal LED Light Emitting Diode OBIS Object Identification System P Active power P Positive active power power drawn by customer P Negative active power power supplied by customer Q...

Page 21: ...21...

Page 22: ...22 EU Declaration of Conformity The current EU Declaration of Conformity is available on the Internet site www emh metering com in the Products area for the meter s product description...

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