Components for 1,000 V DC applications in photovoltaic systems
In photovoltaic systems, the individual strings are merged and secured in the generator connection box and are forwarded to the inverter.
The center of the generator connection box normally contains surge protection modules and/or the DC disconnector. The plus and minus potential are collected to the left and right. The plus potential of the individual strings is often secured using fuses.
Typical structure of a terminal strip in the generator connection box
Non-load voltages of up to 1,000 V DC can be present depending on the system size, and the components used must be designed for this. The following components are recommended for these increased requirements:
Modular terminal blocks with spring-cage connection
- 3031487 ST 6
- 3031490 ST 6 BU
- 3036466 ST 6-TWIN
- 3036479 ST 6-TWIN BU
- 3036178 ST 35
- 3036181 ST 35 BU
- 3033126 STU 35/ 4X10
- 3033210 STU 35/ 4X10 BU
Modular terminal blocks with screw connection
- 3044102 UT 4
- 3044115 UT 4 BU
- 3045127 UT 4 RD
- 3044131 UT 6
- 3044144 UT 6 BU
- 3045185 UT 6 RD
- 3044160 UT 10
- 3044188 UT 10 BU
- 3046304 UT 10 RD
- 3044199 UT 16
- 3044209 UT 16 BU
- 3044225 UT 35
- 3044238 UT 35 BU
- 3009011 UKH 25
- 3009118 UKH 50
- 3009105 UKH 50 BU
- 3048344 UKH 50 RD
- 3010013 UKH 95
- 3010136 UKH 95 BU
- 3010110 UKH 150
- 3010123 UKH 150 BU
- 3010217 UKH 240
- 0711852 UKH 240 BU
- 0704076 UHSK/S 2000
Modular terminal blocks with bolt connection
- 3049013 RT 3
- 3049110 RT 3 BU
- 3049026 RT 5
- 3049123 RT 5 BU
- 3049042 RT 8
- 3049148 RT 8 BU
- 3049518 RTO 3
- 3049660 RTO 3 BU
- 3049521 RTO 5
- 3049767 RTO 5 BU
- 3049343 RTO 8
- 3049864 RTO 8 BU
Fuse terminal blocks
Surge protection modules
- 2804542 VAL-MS 1000DC/1+V
- 2804490 VAL-MS 1000DC/1+V-FM
- 2805091 VAL-MS 1000DC/2+V
- 2920502 VAL-MS 1000DC/2+V-FM
- Arrester sets for photovoltaic systems
SUNCLIX connection system