© MV Technology - 1 4/12/2020
Sectos
NXB and NXBD
Sectos NXB
Pole Mounted SF6 Insulated Switch
 3-position (on-off-earth) or
2-position (on-off)
 Silicon rubber insulators,
CD 620 mm
 12-24 kV, 630 A, 20 kA 3 s
© MV Technology - 2 -
 Making capacity 50 /31,5 kA
- main switch 3 /10 times
- earthing switch 3/5 times
 Optional items
- integrated motor
- auxiliary contacts
- current sensors
Type Sectos NXB_
Sectos NXB
 3-position (on-off-earth) or
2-position (on-off)
 Epoxy resin insulators,
CD 500 mm
 12-24 kV, 630 A, 20 kA3 s
© MV Technology - 3 -
 Making capacity 50/31.5 kA
- main switch 3/10 times
- earthing switch 3/ 5
times
 Optional items
- integrated motor
- auxiliary contacts
- current sensors
Type Sectos NXB_
Sectos NXB
 Bird caps
together with
covered jumpers
(BLX)
 Over voltage
protection
arrester MWK
 Current sensor
KOKU
© MV Technology - 4 -
 Lever for
emergency
operation by hook
stick
Sectos NXB
 Climate
independent
 Control plug-in
cable
 Integrated
motor mechanism
for remote control
© MV Technology - 5 -
 Position
indicator
according to IEC
60129 standard
Sectos NXB
 Direct cable
connection with
Series 400 cable
connectors
© MV Technology - 6 -
 Earth cable
Sectos NXBD 3-way switch
 Sectos NXBD, built of two
NXB in the same housing
 Ideal for line branching
 Two switched ways + one
tapped way
 Equal ratings with NXB
 Two motor-up mechanisms
with a common control box
© MV Technology - 7 -
 Option for integrated CT:s
Sectos NXBD 3-way switch
Sectos NXBD, Main circuit diagram
Main circuit
diagram
Switch nr.
1
I
2
1
3
Position indicator
symbols
Alternative position
CLOSED
symbols
© MV Technology - 8 -
2
1
2
1
3
3
2
1
2
I
O
I
CLOSED
OPEN
CLOSED
1
2
1
3
2
1
O
I
OPEN
CLOSED
2
Sectos NXBD 3-way switch
© MV Technology - 9 -
Sectos NXBD, branching from one cable to two overhead lines
Sectos NXBD 3-way switch
© MV Technology - 10 -
Sectos NXBD, branching from cable to cable and overhead
Sectos NXBD 3-way switch
SECTOS NXBD24. Double switch-disconnector 2pcs. All 4 motors
remote controlled from same DTU131 operating box using REC523
type of RTU
© MV Technology - 11 -
Before
Sectos NXB and NXBD
© MV Technology - 12 -
Installation of two pcs of NXB and one NXBD
Sectos NXB and NXBD
© MV Technology - 13 -
Installation of two pcs of NXB and one NXBD
 One DTU 131 enclosure used for
operating four disconnectors
Sectos NXB and NXBD
© MV Technology - 14 -
Installation
Sectos is complete, fully
tested at the factory and
ready to installation.
It is compact and light
weight making the
installation easier and
faster than ever before.
All necessary
accessories for
installation and use are
available from the well
proven NPS productline.
Sectos NXB and NXBD
Motor operation of Sectos
DTU-enclosure:
 REC523-unit (Digital and analog
inputs from sensors and measuring
transformers)
 communication unit
 heater
 24 VDC battery
© MV Technology - 15 -
 1…4 pcs contactor logic
with local control push
buttons and MCBs
 optional motor up operating
device UEMC40K8 on Sectos NXB
Distribution Terminal Unit (DTU)
DTU 131 and 135
Sectos NXB and NXBD
Motor operation of Sectos
DTU-enclosure :
 RTU211-unit (Digital inputs only, no
measuring)
 communication unit
 heater
 24 VDC battery
© MV Technology - 16 -
 1…4 pcs contactor logic
with local control push
buttons and MCBs
 optional motor up operating
device UEMC40K8 on Sectos NXB
Distribution Terminal Unit (DTU)
DTU 131 and 135
Sectos
Sectos switch disconnector
12…24 kV (BIL max. 125 kV)
© MV Technology - 17 -
NXB technology
NXB
NXBD
Motor up
Manual
Conical epoxy
bushings
Outdoor
epoxy bushings
Direct cable
Silicon
insulators
for overhead line
Overhead line
24…36 kV (BIL max. 170 kV)
NXA technology
NXA
Motor up
Motor down
Manual
Conical epoxy
bushings
Direct cable
Silicon
insulators
for overhead line