ABB AC 800M

Power Supply Units – Types SD821, SD822 and SD823 Appendix A Hardware Units
186 3BSE 027 941 R301
Insulation of Power Supply Units (PSU)
Basic with protective conductor; primary circuit separated from all other live
circuits by reinforced insulation.
Rated insulation voltage, Primary to Secondary 300V AC.
Dielectric test voltage 3000V AC (EN 60950).
Fuses and Protective Devices
Internal primary main fuses are arranged to meet the requirements of electrical
safety publications for connection to the Phase – Neutral terminals of the primary
main network; TN network, 1 (one) fuse. Recommended primary external fuse:
• Micro Circuit Breaker (MCB) 10 Amperes, characteristic B.
Table 53. Power Supply Units – Fuses and Protective Devices
Fuse SD821 SD822 SD823
Primary: Internal fuse 3.15AT 4AT 6.3AT
Primary: Recommended external fuse
(1)
(1) Microcircuit Breaker (MCB), Characteristic B
10A
(1)
10A
(1)
10A
(1)
Secondary: Short circuit <5A <10A <20A
Secondary: Over-load protection 3A> I
I <5A
6A< I
I< 10A
12A< I
I<20A
Secondary: Over-Voltage protection 32V typ 29V typ 35V typ