The document provides information on primary and secondary connections for voltage transformers (VTs) assembled on various Siemens nxair family switchgears. It lists the VT models, circuit breaker versions, and connection types used for different voltage ratings of the nxair M and P models. Diagrams illustrate examples of screw, integrated fuse, and encapsulated wire connections. The document is intended to clarify the VT configuration and notes that any mismatches should be reported to the specified contact.

1. PRIMARY AND SECONDARY CONNECTIONS FOR NXAIR FAMILY VT'S
VT's assembled on:
Aditional BB
compartment
Siemens product
↓
nxair
nxair M ≤12KV
15KV ≤ nxair M ≤ 17,5KV
nxair M 24KV
nxair M
nxair P 12KV
nxair P 15KV
<=31.5kV <=17.5kV
CB version
4MR12
4MR12
4MR14
4MR14
4MR14
4MR12
4MR14
(110-3077.3)
Metering cassete
bellow CB
Bus Riser
screw + F21
F22 + F21
F22 + F21
F22 + F21
F22 + F21
X
X
(110-3077.3)
screw + F21
F22 + F21
F22 + F21
F22 + F21
F22 + F21
F22 + F21
F22 + F21
(110-3077.3)
F23*
F
F23* *
F23
F23
X
F23*
X
Not developed
screw + F21
F22 + F21
F22 + F21
F22 + F21
F22 + F21
X
X
Not developed
Bus riser
BB Metering panel BB Metering panel
withdrawable VT's
WITH FUSE
WITHOUT FUSE
Vt's model
nxact / sion
nxact
nxact
nxact
sion
nxact
nxact
Sion
Cable
compartment
↓
↓
screw
screw
screw
F23
X
screw
screw
(110-3077.3)
screw
screw
screw
F23
F23
screw
screw
(110-3077.3)
screw
screw
screw
X
F22
screw
screw
(110-3077.3)
Example pictures:
Legend
F21: secondary leads
F22: encapsulated primary wire connection
F23: primary integrated fuse
x : version not available
* : available as special construction (kuko) within 12KV rated voltage
* * : standard 4MR12 with F23 made in a 4MR14 frame (size).
screw
F22
screw
F21
F21
F23
F23
4MR12 - 12KV
4MR14 - 24KV
110-3077.3
Type Platform
without secundary
wiring from the supplier,
The present document stands as information to the Vt's connections configuration, on nxair family switchgears. If any mismatch is found, please report to: pedro.reis@siemens.com
Vt's configuration ed04-under construction.xls
11/24/2013

3. Nxtools order code:
7,2KV:
029-0687,3
12KV:
029-0688,3
15KV:
029-0689,3

7. Nxtools order codes:
7,2 KV
SIB | 3000213.6,3
12KV:
SIB | 3000413.6,3
24KV:
SIB | 3000613.6,3_1
e=
292
292
442 NxairM