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Fuse switch disconnectors
Instructions
Safety from finger-touch
See Technical data
Commissioning and maintenance by qualified persons only.
Follow the operating instructions!
Application
The fuse switch disconnectors are used for closing on and disconnection of rated
operating currents up to 630 A AC.
Installation
For dimension drawings see Fig. I (dimensions in mm).
a Fuse switch disconnector for rear mounting
b Fuse switch disconnector for front mounting
c Fuse switch disconnector with fuse monitoring via 3RV1
d Fuse switch disconnector with electronic fuse monitoring (via EMDS module)
Maintain clearances to earthed components!
For permissible mounting positions see Fig. IIa.
For rear mounting see Fig. IIIa, b, c, f, g. Ensure that the surface is level! For mounting
holes see Fig. IIb.
Fit terminal screws and fasten contact carrier with 4 M8 screws. Always use plain and
spring washers.
For front mounting with 3NY121. installation kit see Fig. IIId, e, f, g.
For installation apertures and mounting holes see Fig. IIc.
Fasten front frame only with plastic screws provided.
For fitting the arc chute see Fig. IIIg, 7.
Connection
For main conductor see Fig. IIIf
- with cable lug (3NP5.6-0.A..)
to DIN 46234 (∅mm
to DIN 46235 (∅mm
- with busbar (3NP5.6-0.A..)
bar width (mm)
terminal screws
tightening torque
If 3NY124. single covers are used, the protruding thread length must be 7 to 15 mm (see
Fig. VI). Use longer screws if necessary.
For clamp connection with 3NP5260-0.B.. see Fig. Vd, e.
- Round conductor (only 1 conduct. per clamping pt., ∅mm
terminal screws
tightening torque
- Bar
Make a cutout on the clamp cover as shown by the marking.
For protective cond. see Fig. Vc
- with cable lug
to DIN 46234 (∅mm
to DIN 46235 (∅mm
- with busbar (mm)
terminal screws
For attachment of terminal clamp next to protective conductor see Fig. Vd.
Auxiliary switch connection
6.3 × 2.5 mm or 6.3 × 1 mm to DIN 46247.
Receptacle
With control voltage >AC 25 V all
connections must be insulated.
Operation
Where the incoming feeder enters from below and the connection
angle is ≤ 30°, the contact elements of the fuse inserts are live!
Installation of fuse links for fuse switch disconnectors
- for version without fuse monitoring see Fig. IVa, 3.
- for version with fuse monitoring see Fig. IVb, 3.
Use fuse links with silver-plated blades or silver-plated disconnecting links only! After
installation, check that the arc chute fits firmly. For fuse carrier installation
see Fig. IIIg, 8 and 9.
Maintenance
Grease the main contacts (with Shell Alvania RLQ2 or another high-grade aging-resistant
mineral-oil-based lithium-soap grease/worked penetration: 265 - 295, service temperature:
-30 to +120 °C) and grease the latching springs on the sides of the baseframe at the
pivoting points of the fuse carrier (e. g. with Molykote paste D), approx. every 6 months
according to switching rate.
For replacement of the arc chute see Fig. IIIa, 3 and IIIg, 7.
For replacement of the fuse link see Fig. IVa or IVb.
2
3NP526 3NP536 3NP546
2
)
6 to 150 6 to 240
2
)
16 to 150 16 to 240
22 to 30 22 to 30
M10
25 to 30 Nm
2
) 35 to 120
M6
5 to 6 Nm
max. 22 × max. 10
3NP526 3NP536 3NP546
2
6 to 2 × 70
)
2.5 to 70
2
) 16 to 2 × 70
16 to 70
25 25
M8 M10
Order No.: 3ZX1012-0NP52-1AA1
WARNING:
DISCONNECT POWER BEFORE PROCEEDING
Retrofitting of auxiliary switch 3NY3034:
- On 3NP52 snap bracket onto auxiliary switch and fasten it by the eyelets provided on the
lower side of the contact strip (see Fig. Va).
- On 3NP53/54 fasten auxiliary switch without bracket (see Fig. Vb).
For fitting the plug connector to (or removing it from) the circuit-breaker, see Fig. VIIa; for
the EMDS module see Fig. VIIb.
Function
Version with fuse monitoring
- via 3RV1 (3NP5.60-0E..6).
Auxiliary switch and 3RV1 circuit-breaker are wired.
- for U 24 to 690 V AC see Fig. VIIIa
e
- for U 24 to 150 V DC see Fig. VIIIb
e
- for U 24 to 440 V AC see Fig. VIIIc
e
For auxiliary circuit (3RV1) see Fig. IX
a 1 NO + 1 NC
31 NC/33 NO = blue
32 NC/34 NO = brown
- via EMDS module (3NP5.60-0HA1.)
➀
Operation/Fault
- for U 400/500 V AC see Fig. VIIId
e
For auxiliary circuit 1 NC + 2 NO see Fig. VIIId,
24 grey, 33 white, 34 red).
Internal power supply:
6 to 2 × 240
The electronic fuse-failure monitoring (EMDS) module operates only when power is supp-
16 to 2 × 240
lied from above. If no voltage is present at L1 and/or L2, there is no status indication. The
switch disconnector can still be live. If no voltage is present at L3, the green LED flashes.
22 to 40
Version without fuse monitoring
≤ 220 V DC see Fig. Xa
- for U
e
Technical data
Restricted safety from finger-touch to IEC 60529, DIN 40 050
(only from the operating side)
Degree of protection IP 00 without moulded-plastic masking frame
Degree of protection IP 10 without masking frame with single cover
Degree of protection IP 10 with masking frame with the fuse carrier open
Degree of protection IP 30 with masking frame with the fuse carrier closed
Permissible ambient temperature
- operation
- storage
Operating behaviour
Insulation rating U
6 to 2 × 120
16 to 2 × 120
Weight: without fuse monitoring
30
with fuse monitoring via 3RV1
M10
with fuse monitoring via EMDS
Rated current I = continuous current
th
Size of fuse links
Rated conditional fused short-circuit
current
at
and
or at
and
Rated short-circuit making capacity
with isolating links
at
Rated thermal currents
Fuse link
Fuse switch disconnector, open-type I
Fuse switch disconnector, enclosed
Auxiliary switch
Rated thermal current
Rated operational current
at 400 V, 50/60 Hz
1
) Approved fuse-links: Low-voltage hight-rupturing-capacity (l.v.h.r.c.) fuses to DIN VDE
0636 Part 21 and DIN 43620 Part 1. The nominal ratings for operation and of the fuses
must not exceed the nominal ratings of the equipment.
Pertaining to the use of semiconductor fuse-links to DIN VDE 0636 Part 23 and DIN 43620
Part 1: see catalog DA 94, SITOR fuse-links. The operating restrictions indicated therein
must be observed.
For further data see Catalog NS K.
3NP526, 3NP536, 3NP546
DIN VDE 0660 Part 107, IEC 60947-3
HAZARDOUS VOLTAGE
CAN CAUSE ELECTRICAL SHOCK
AND BURNS.
WITH ANY WORK ON THIS EQUIPMENT.
b 2 NO
41 NC/43 NO = black
42 NC/44 NO = white
➁
Fuse failure
➂
(11 brown, 12 black, 23 blue,
≤ 440 V DC see Fig. Xb
- for U
e
-25 °C to +55 °C
-50 °C to +80 °C
1600 switching cycles
690 V
i
3NP526
5,7 kg
7,0 kg
6,6 kg
250 A
1
) 1/0
I 105 kÂ
I 250 A
n
U
e
I 200 A
n
U
e
U
e
I
I 250 A
e
250 A
th
I 240 A
the
I
th
I /AC-12
e
I/AC-15
English
c 2 NC
➂
Aux. circuit 1 NC + 2 NO
3NP536 3NP546
6,9 kg 8,0 kg
8,2 kg 9,3 kg
7,8 kg 8,9 kg
400 A 630 A
2/1 3/2
105 k 105 kÂ
400 A 630 A
500 V AC
315 A 500 A
690 V AC
500 V AC
17 kÂ
400 A 630 A
400 A 630 A
380 A 570 A
16 A
16 A
6 A