7
c. Notes
1. The USA sockets can be run as grounded to the case or as ungrounded - depending on the usage
requirement - there is a switch allowing the selection of grounded or ungrounded mode. See
discussion on PE grounding in Section 2: Operation
2. The L,N screw terminals outlets are used for a fully isolated connection on the secondary side of
the transformer.
3. For safety reasons please consider to connect your devices to the isolation transformer output via
an RCD (residual current device). RCDs are available as plugs, power strips, as well as DIN rail switches.
4. Make sure the power is disconnected before rewiring.
5. This transformer automatically detects the input voltage. At an input voltage between 200 and 250V,
the input will be detected and output voltage will be stepped down to the secondary side of the
transformer to half of the input voltage (input of 220 will output 110, input of 240 will output 120).
At an input voltage between 100 and 130V, the input will be automatically detected the output
voltage maintained at the same level as the input but isolated on the secondary side of the transformer.
Size name Maximum
capacity
Operating
capacity
MII-D 1000 1000 Watts
4500 Watts
800 Watts
3600 Watts
4A at 230V input
8A at 110V input
IEC input 110 or
220V (Automatic
voltage detection)
Screw Terminal 110
or 220V (Automatic
voltage detection)
Screw terminal
& USA Socket
110V
Screw terminal
& USA Socket
110V
15A at 230V input,
30A at 110V input
Yes
No
MII-D 4500
Circuit breaker
current protection
Soft
starter
Input
Output
d. Specifications
Bronson MII-D Series
Toroidal Core Isolation Transformer
Instruction Manual
