Properties
- flow rates up to 12,000 m³/h
- size: 249 - 399 mm (impeller diameter)
- steep volume-pressure curve
- extremely low starting current
- casing made of galvanised sheet steel
- asynchronous external rotor motorr
- forward curved impellers
- protection class IP54
- thermal class F
- motor protection by thermal contacts
- speed is variable using auto transformers
Casing
The casing is made of galvanised sheet steel. On request, a plastic coating can be applied at an additional cost.
model - ERA single inlet design (E)
model - DRA double-sided inlet design (D)
Impellers
The impeller is made of galvanised sheet steel, and is mounted directly to the rotor of the external rotor motor and balanced dynamically at two levels together with the rotor according to quality level G2.5 to DIN ISO 1940.
Electrical connection
The drive motors are fitted with an outgoing cable. The electrical connection is made via an IP54 terminal box which is supplied loose.