What this 3VA1 breaker delivers
Overload protection is adjustable: Ir from 112 A to 160 A, so you set it to match the continuous load without swapping the trip unit. Short-circuit pickup Ii is fixed at 5 to 10 times In (800–1600 A), which is the standard range for motor and feeder protection in IEC 60947-2 applications. The -ZD00 suffix adds a nut keeper kit and is configured for a DC Power OEM in China — verify the accessory kit matches your panel's gland-plate or bus-bar mounting before specifying.
The 3-pole, 160 A frame occupies three modular units (each 27 mm wide on a DIN rail). The TM240 trip unit is non-interchangeable in the field; if your load profile changes beyond the Ir adjustment range, you replace the entire breaker, not just the trip block.