Current Measurement; Voltage Measurement - SMA STRING-MONITOR SSM-U-2410 Technical Information

7 Technical Data
Electrical Data
Rated voltage
At installation altitudes over 2,000 m, an additional re-
duction factor must be taken into account.
Rated current (I ) at 50°C*
DCmax
Rated current (I ) at above 50°C*
DCmax
Rated current per measuring input*
Fuse characteristics
Number of string inputs per potential
DC supply voltage from PV array
External AC supply voltage**
DC load-break switch
DC load-break switch - actuation under load
DC load-break switch - actuation
at ‒40°C
Surge arrester DC
Overvoltage category
* Maximum continuous operating current up to the specified ambient temperature, taking a maximum irradiation up to 1,200 W/m
account (hourly average value of the horizontal global radiation). In case the irradiation is higher, the rated current must be adapted
linearly downwards.
** available as an accessory (see Section 8, page 24)

Current Measurement

Number of measuring channels
Current measurement range
Maximum error at +25°C*
Maximum error in temperature range*
* based on the end value of the current measurement range

Voltage Measurement

Number of measuring channels
Voltage measurement range
Maximum error at +25°C*
Maximum error in temperature range*
* based on the current measurement range end value
18 SSMUXX1015-TI-en-10
1,000 V
2,001 m to 3,000 m reduction by 1.0% per 100 m
3,001 m to 4,000 m reduction by 1.2% per 100 m
Reduction by 2.5% per K
17.5 A
16 / 24 / 32
+200 V
DC
230 V
Max. 200 switching cycles
Max. 100 switching cycles
Type 2 (monitored)
I
nom
I
max
16 / 24 / 32
−2.5 A to +17.5 A
+250 V
DC
SMA Solar Technology AG
/ 1,500 V
DC DC
315 A
DC
DC
gPV
to +1,500 V
DC
±20%
AC
400 A
DC
= 20 kA
= 40 kA
II
±0.5%
±1.0%
1
to +1,500 V
DC
±0.5%
±1.0%
Technical Information
2
into