MULTI SENTRY
SPTMSTD2T16EREN
30
>11.6 OPTIONAL TRANSFORMERS
An external transformer can be installed. Transformer options include: supply neutral reference, Galvanic
insulation and output voltage (step-up or down).
a)
Transformer located inside the UPS
(this option is only factory-installable on the version MST 10÷40 and
MSM 10÷20).
The optional internal transformer is connected to the output to guarantee galvanic isolation both during
inverter and bypass operating modes.
A Star-Star type transformer is used which does not induce phase displacement between the input and
output; the neutral of the secondary is not earthed hence making the UPS suitable for TT, TN and IT
connections.
The transformer is connected to the output terminals of the UPS, therefore the values shown on the
display refer to quantities measured upstream of the transformer.
Model
Dimensions
Weight
Circuit
Primary/
Secondary
Vector Group
Class
Temperature /
Insulation
MST 10 OT
MST 12 OT
MST 15 OT
MST 20 OT
MST 30 OT
MST 40 OT
440*850*1320
195
200
255
260
365
375
Star / Star
YnYn0
H / H
MSM 10 OT
MSM 12 OT
MSM 15 OT
MSM 20 OT
440*850*1320
190
195
250
255
Mono / Mono
/
H / H