Disconnecting switches OMI, OMZI
contacting switching devices securing the safe disconnecting distance in accordance with requirements determined
for the disconnecting switches by a technical standard in OFF position
- used for visible disconnection of electric device after disconnection of performance switches 12kV a 25kV.
- used for disconnection of the sections, whole networks, machines and devices for the purposes of repairs, revisions etc.
- they replace the types OM and OMZ
- can be assembled into cells of internal distributions, ambient temperature from -5°C up to 40°C altitude up to 1000 m
- can be assembled in horizontal or vertical position
Comply with EN 60 271-102
Degree of protection: IP 00 (EN 60 529)
- Insulators: epoxy, porcelain
- current conducting parts: Cu galvanically silvered
- busbars: Cu, Al
- possibility to produce the version for heavy climatic conditions
- control: - manual or electromotive
Type designation
OMI (OMZI) XX / XXXX - XX - XX - X - XX
accessories (BLM = locking solenoid)
drive location (P = right, L = left)
drive type (RP = manual, EP = electromotive)
earther (0 - without earther (OMI) or earther on lower
contacts (OMZI), 1 = without shaft, switching off by means
of a switching-off bar, 2 = earther on the upper contacts).
number of poles (1 = single-pole, 2 = two-pole, 3 = three-pole)
rated current (A): 400, 630, 1250, 1600, 2000, 3150*, 4000* (* = only OMI, OMZI 12kV)
rated voltage (kV): 12kV, 25 KV
disconnecting switch type (OMI - without earther, OMZI with earther)
Designation examples:
Example 1: OMI 25 / 1250 30 EPU L
- Disconnecting switch for 22 kV, 1250 A, three pole, EPU drive (The project designer shall specify the supply voltage and emergency
control mode).
Example 2: OMI 12 / 630 30 RP1 L BLM
- Disconnecting switch for 12 kV, 630 A, three pole, manual drive located in the left and provided with locking solenoid. (The project
designer shall specify the rated voltage of the BLM locking solenoid and supporting bearing location mode).
Example 3: OMZI 12 / 3150 30 EPU P
- Disconnecting switch for 12 kV, 3150 A, three pole, EPU drive for main knives located in the left, the EPU drive for earthing knives
located in the right (The project designer shall specify the supply voltage, number and length of handling bar ESPA 415.3. The standard length of the handling bar is 3000 mm).
Example 4: OMZI 25 / 400 32 ETMP L
- Disconnecting switch for 22 kV, 400 A, three pole, ETMP drive for main knives located in the left, the ETPM drive for earthing knives
located in the right (The project designer shall specify the supply voltage, number and length of handling bar ESPA 415.3. The standard length of the handling bar is 3000 mm).
G3
Disconnecting switches OMI, OMZI
teCHnICal Data
Rated voltage, kV with
the atmospheric pulse,
kV
Rated voltage, kV
Against the earth,
between poles and
disconnected contacts
75
125
12
25
In the disconnecting
route
85
145
Rated 1 min. short-term
holding AC voltage of
the industrial frequency,
kV
Against the earth,
between poles and
disconnected contacts
28
50
In the disconnecting
route
32
60
Without the earther
type designation
Rated voltage, kV
Rated current, a
OMI 12/400-30
OMI 12/630-30
OMI 12/1250-30
OMI 12/1600-30
OMI 12/2000-30
OMI 12/3150-30
OMI 12/4000-30
OMI 25/400-30
OMI 25/630-30
OMI 25/1250-30
OMI 25/1600-30
OMI 25/2000-30
12
12
12
12
12
12
12
25
25
25
25
25
400
630
1250
1600
2000
3150
4000
400
630
1250
1600
2000
nom. short-term
current 1 s, ka
16
25
40
40
50
60
80
16
25
40
50
50
nom. dynamic
current, ka
40
63
100
100
125
150
200
40
63
100
125
125
Weight*, kg
nom. short-term
current 1 s, ka
16
25
40
40
50
60
60
16
25
40
50
50
nom. dynamic
current, ka
40
63
100
100
125
150
150
40
63
100
125
125
Weight*, kg
20
23
51
82
115
130
190
36
39
71
110
155
* Weight of the basic version without accessories
With the earther
type designation Rated voltage, kV
OMZI 12/400-30
OMZI 12/630-30
OMZI 12/1250-30
OMZI 12/1600-30
OMZI 12/2000-30
OMZI 12/3150-30
OMZI 12/4000-30
OMZI 25/400-30
OMZI 25/630-30
OMZI 25/1250-30
OMZI 25/1600-30
OMZI 25/2000-30
Rated current, a
12
12
12
12
12
12
12
25
25
25
25
25
* Weight of the basic version without accessories
omZI 25/400-30 with etmp
G4
400
630
1250
1600
2000
3150
4000
400
630
1250
1600
2000
27
29
60
95
160
170
230
42
44
80
135
180
Disconnecting switches OMI, OMZI
Dimensional layouts
Three-pole disconnecting switches 400 and 630 A
Type
OMI 12/400-30
OMI 12/630-30
OMI 25/400-30
OMI 25/630-30
OMZI 12/400-30(32)
OMZI 12/630-30(32)
OMZI 25/400-30(32)
OMZI 25/630-30(32)
kg
30
35
40
45
48
50
64
66
A
484
506
584
606
484
506
584
606
B
600
600
810
810
600
600
810
810
C
430
430
630
630
430
430
630
630
D
255
255
335
335
255
255
335
335
F
200
200
300
300
200
200
300
300
H
560
560
770
770
560
560
770
770
K
320
320
420
420
320
320
420
420
L
415
415
520
520
415
415
520
520
L1
475
475
560
560
475
475
560
560
N
76
76
76
76
76
76
76
76
P
32
40
32
40
32
40
32
40
R
Ø18
Ø18
Ø18
Ø18
Ø18
Ø18
Ø18
Ø18
S
M12
M16
M12
M16
M12
M16
M12
M16
T
15
25
15
25
15
25
15
25
V
165
165
260
260
U
110
110
160
160
Three-pole disconnecting switches 1250 A
Type
kg
A
OMI 12/1250-30
80 600
OMI 25/1250-30
90 715
OMZI 12/1250-30(32) 110 600
OMZI 25/1250-30(32) 130 715
B
600
810
600
810
C
540
710
540
710
D
321
401
321
411
F
200
300
200
300
H
560
770
560
770
K
320
420
320
420
N
76
76
76
76
P
60
60
60
60
R
Ø18
Ø18
Ø18
Ø18
S
M12
M12
M12
M12
T
20
20
20
20
T1
40
40
40
40
U
V
L
415
520
110 220 415
160 300 520
L1
475
560
475
560
G5
Disconnecting switches OMI, OMZI
three-pole disconnecting switches 2000 a, 3150 a
type
OMI 12/2000-30
OMI 25/2000-30
OMZI 12/2000-30(32)
OMZI 25/2000-30(32)
OMZI 12/3150-30
kg
102
132
112
152
143
a
810
930
810
930
840
B
924
1120
924
1120
924
omI 25/400-30 with etmp
G6
C
360
479
360
479
410
D
610
760
610
760
650
F
280
350
280
350
280
H
844
1040
844
1040
844
J
455
555
455
555
455
l
540
640
540
640
540
l1
655
855
655
855
655
m
154
230
154
230
154
V
345
425
355
435
345
s
10
10
10
10
10
omI with fuse base
p
100
100
100
100
100
t
20
20
20
20
20
t1
40
40
40
40
40
t2
25
25
25
25
25
t3
50
50
50
50
50
n
94
94
94
94
94
Disconnecting switches OMI, OMZI
Three-pole disconnecting switches 400 and 630 A with the ETMP drive with emergency
control by means of the switching-off bar ESPA 415.3
terminals
cam switch
G7
Disconnecting switches OMI, OMZI
adjustable rod
adjustable rod
bearing
G8
Disconnecting switches OMI, OMZI
Disconnecting switch OMZI 12/3150 - 30L with EPU
support bearing
terminal
cam switch
G9
according to request max. 1600
Disconnecting switches OMI, OMZI
adjustable rod
adjustable rod
bearing
according to request max. 1500
G10
Disconnecting switches OMI, OMZI
Disconnecting swith OMI 12/4000 - 30L with EPU on frame
G11