Connecting The Voltage Measurement - SMA FUEL SAVE CONTROLLER 2.0 Instrucciones De Instalación

6 Electrical Connection
☐ It must be possible to short-circuit the current transformer outputs by an external short circuit device outside of the
Fuel Save Controller.
☐ Summation current transformers must have identical transformation ratios and be of the same type.
☐ When using summation current transformers, the complete current transformer system must have a resulting
accuracy class of one or lower.
☐ The requirements for the measurement inputs of the Fuel Save Controller must be complied with (see Section 11
"Technical Data", page 51).
☐ The input current at the current transformer terminals must not exceed 1 A.
Cable requirements:
☐ Conductor cross-section: 1.5 mm² to 2.5 mm²
☐ Conductor material: Copper
☐ Maximum cable length: 100 m
SMA Solar Technology AG recommends using a ten-conductor cable with a conductor cross-section of 2.5 mm² to
connect current measurement and voltage measurement of the Fuel Save Controller.
Procedure:
1. Insert the cable (see Section 9.1 "Inserting the Cables", page 47).
2. Strip 15 mm to 18 mm of the insulation from the cable's insulated conductors. When doing so, ensure that no
pieces of cable fall into the enclosure.
3. Connect the insulated conductors to the terminals X700:1 to X700:39 in accordance with the customer-specific
system circuitry. If the conductors are stranded wires, additionally pretension the springs of the spring-cage
terminals using a screwdriver (see Section 9.2 "Connecting the Stranded Wire to the Spring-Cage Terminal",
page 48).
4. Remove the jumpers from the wired terminals using suitable pliers. The red jumpers are fitted at the factory.
5. Ensure that the wires are correctly connected and fit tightly.
6. Ensure that the red jumpers are plugged into the unconnected terminals (see Section 6.7.1 "Setup of the current
and voltage measurement", page 26).
6.7.3

Connecting the Voltage Measurement

Danger to life from electric shock due to live voltage
Danger of electric shock if work is executed incorrectly or under fault conditions. An electric shock can lead to death
or serious injury.
• Disconnect the supply voltage and the measuring cables for the current- and voltage measurement before
performing any work on the Fuel Save Controller.
• Observe the five safety rules when disconnecting the supply voltage:
– Disconnect from voltage sources.
– Ensure that the device cannot be reconnected.
– Ensure that no voltage is present.
– Ground and short-circuit the device.
– Cover and isolate any adjacent live components.
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SMA Solar Technology AG
Installation Manual