Current And Voltage Transformers; Voltage Transformers - Siemens 8DB10 Installation And Operating Instructions Manual

Description
Features
Voltage transformer types
Electrical data
Designation
Operating voltage kV
Rated voltage kV
Rated short-duration power-frequency
withstand voltage kV
Rated lightning impulse withstand voltage kV
Rated voltage factor
Standard
28/214
12

Current and voltage transformers

12.1

Voltage transformers

• According to IEC 60044-2
• Cast-resin insulated
• Inductive type
• Safe-to-touch due to metal enclosure
Fig. 12: Voltage transformer installation (basic scheme)
① Busbar voltage transformer 4MT3
② Feeder voltage transformer 4MT7
(connection at panel connection housing)
Mounting locations Type
Busbar 4MT3
4MU4
Panel connection 4MU3
4MT7
4MT3
3.3 to 23.0
24.0
65.0
125.0
Un / 8h = 1.9
Un / continuous = 1.2
IEC
GOST
GB
Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
③ Voltage transformer 4MU4 with
three-position disconnector
④ Feeder voltage transformer 4MU3 (not in
the panel, connection via flexible cable with plug
size S2 at the panel connection housing, and
metal-enclosed voltage transformer)
Comment
optionally with three-position disconnector
external
directly pluggable
4MU4 4MT7
24.0 to 38.0 3.3 to 38.0
40.5 40.5
95.0 95.0
200.0 200.0
Un / 8h = 1.9 Un / 8h = 1.9
Un / continuous = 1.2 Un / continuous = 1.2
IEC IEC
GOST GOST
GB GB
4MU3
3.3 to 38.0
40.5
95.0
200.0
Un / 8h = 1.9
Un / continuous = 1.2
IEC
GOST
GB