SMA SC 4000 UP, Service Manual

4  Power-Generating Unit Protection Test

SMA Solar Technology AG

Service Manual for Installers

SC-UP_SCS-UP_EZE-SG-en-10

16

4.4

Performing the Power-Generating Unit Protection Test

Materials required for test:

☐ Three-phase testing device with the following properties:

– Trigger function for monitoring the potential-free contact

– Voltage range (depends on the power class, see operating manual) up to 759 V

AC

 (line-to-line) with accuracy

better than 0.1%

– Logging function

☐ Laptop for changing the inverter parameters

☐ Data query sheet TR8

Requirements:

☐ The relevant test parameters have been saved (see Section 4.3, page 15).

☐ The tap changer setting on the MV transformer complies with the specifications of the grid operator or the PV

system certificate.

☐ The parameter settings comply with the specifications of the grid operator or the PV system certificate.

Procedure:

1. Identify the measurement and disconnect terminal using the circuit diagram and reference designation.

2. Connect the outputs L1, L2 and L3 of the testing device to the

measurement inputs P1, P2 and P3 on the measurement and
disconnect terminal 

-X250

 of the voltage measurement unit.

−X 371

−X 373

1 2 3

1 2 3

−X 372

1 2 3

−X 540

−X 440

−X 740

−X 416

1 2

−X 250

1 2 3

4 5

3. Connect the binary input of the testing device to the measurement inputs P4 and P5 on the measurement and

disconnect terminals of the voltage measurement unit.

4. Connect the testing device to the external voltage supply.

5. Connect the laptop to the service interface.

6. Log into the user interface as an installer.

7. Perform the power-generating unit protection test in accordance with the TR8 data request form. Set the test

parameters in accordance with the specifications of the grid operator or the PV system certificate.

• Voltage increase protection V> / t

V>

 with the parameters

 VCtl.Hi1Lim 

 and 

VCtl.Hi1LimTm

• Voltage increase protection V>> / t

V>>

 with the parameters

 VCtl.Hi2Lim 

 and 

VCtl.Hi2LimTm

• Voltage increase protection V>>> / t

V>>>

 with the parameters

 VCtl.Hi3Lim 

 and 

VCtl.Hi3LimTm

• Voltage increase protection V>>>> / t

V>>>>

 with the parameters

 VCtl.Hi4Lim 

 and 

VCtl.Hi4LimTm

• Voltage increase protection V>>>>> / t

V>>>>>

 with the parameters

 VCtl.Hi5Lim 

 and 

VCtl.Hi5LimTm

• Voltage increase protection V>>>>>> / t

V>>>>>>

 with the parameters

 VCtl.Hi6Lim 

 and 

VCtl.Hi6LimTm

• Voltage drop protection V< / t

V<

 with the parameters 

VCtl.Lo1Lim

 and 

VCtl.Lo1LimTm

• Voltage drop protection V<< / t

V<<

 with the parameters 

VCtl.Lo2Lim

 and 

VCtl.Lo2LimTm

• Voltage drop protection V<<< / t

V<<<

 with the parameters 

VCtl.Lo3Lim

 and 

VCtl.Lo3LimTm

• Voltage drop protection V<<<< / t

V<<<<

 with the parameters 

VCtl.Lo4Lim

 and 

VCtl.Lo4LimTm

• Voltage drop protection V<<<<< / t

V<<<<<

 with the parameters 

VCtl.Lo5Lim

 and 

VCtl.Lo5LimTm