Siemens 3RB20 Manuale di riferimento - Pagina 25

Sfoglia online o scarica il pdf Manuale di riferimento per Apparecchiature industriali Siemens 3RB20. Siemens 3RB20 46. Protection equipment, overload relays
Anche per Siemens 3RB20: Manuale di istruzioni per l'uso (6 pagine), Istruzioni per l'uso (4 pagine), Manuale (18 pagine)

Stampa la pagina
Siemens 3RB20 Manuale di riferimento
Type
Size
Width
Auxiliary circuit
Number of NO contacts
Number of NC contacts
Auxiliary contacts – assignment
Rated insulation voltage U
i
(degree of pollution 3)
Rated impulse withstand voltage U
Auxiliary contacts – contact rating
• NC contact with alternating current AC-14/AC-15
I
Rated operational current
at U
e
e
- 24 V
- 120 V
- 125 V
- 250 V
• NO contact with alternating current AC-14/AC-15:
I
Rated operational current
at U
e
e
- 24 V
- 120 V
- 125 V
- 250 V
• NC, NO contact with direct current DC-13:
I
Rated operational current
at U
e
e
- 24 V
- 60 V
- 110 V
- 125 V
- 250 V
I
• Conventional thermal current
th
• Contact reliability
(suitability for PLC control; 17 V, 5 mA)
Short-circuit protection
• With fuse, gL/gG operational class
Ground-fault protection (only 3RB21)
I
• Tripping value
Δ
I
• Operating range
• Response time t
(in steady-state condition)
trip
Integrated electrical remote reset (only 3RB21)
Connecting terminals A3, A4
Protective separation between main and auxiliary con-
ducting path acc. to IEC 60947-1
CSA, UL, UR rated data
Auxiliary circuit – switching capacity
Connection of the auxiliary circuit
Connection type
• Terminal screw
• Tightening torque
• Conductor cross-sections (min./max.), 1 or 2 conductors
- Solid
- Finely stranded without end sleeve
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
Connection type
• Conductor cross-sections (min./max.), 1 or 2 conductors
- Solid
- Finely stranded without end sleeve
- Finely stranded with end sleeve
- Stranded
- AWG cables, solid or stranded
Footnotes for page 24:
1) Please observe operational voltage.
2) Type of coordination and short-circuit protective devices acc. to IEC 60947-4-1:
Type of coordination "1": The contactor or the starter may be non-opera-
tional after every short-circuit release.
Type of coordination "2": The contactor or the starter must be operatio-
nal after a release (without replacement of parts). There is a risk of contact
welding.
3RB20 16,
3RB21 13
S00
45 mm
1
1
1 NO for the signal "tripped",
1 NC for disconnecting the contactor
V
300
kV
4
imp
:
A
4
A
4
A
4
A
3
:
A
4
A
4
A
4
A
3
:
A
2
A
0.55
A
0.3
A
0.3
A
0.11
A
5
Yes
A
6
The information refers to sinusoidal residual currents at 50/60 Hz
> 0.75 ×
Lower current setting value <
s
< 1
24 V DC, 100 mA, 2.4 W short-term
V
300
B300, R300
Pozidriv size 2
Nm
0.8 ... 1.2
2
mm
1 × (0.5 ... 4), 2 × (0.5 ... 2.5)
2
mm
–
2
mm
1 × (0.5 ... 2.5), 2 × (0.5 ... 1.5)
2
mm
–
AWG 2 × (20 ... 14)
2
mm
2 × (0.25 ... 1.5)
2
mm
--
2
mm
2 × (0.25 ... 1.5)
2
mm
2 × (0.25 ... 1.5)
AWG 2 × (24 ... 16)
3RB2 Solid-State Overload Relays
3RB20, 3RB21 for standard applications
3RB20 26,
3RB20 36,
3RB21 23
3RB21 33
S0
S2
45 mm
55 mm
I
motor
I
< 3.5 × upper current setting value
motor
Screw terminals
Spring-type terminals
3) U
= 500 V.
e
4) Contactor cannot be mounted.
5) Please ensure that the maximum AC-3 operational current has sufficient
safety clearance from the rated current of the fuses.
6) With 3UF18 68-3GA00 current transformer.
Overload Relays
3RB20 46,
3RB20 56,
3RB20 66,
3RB21 43
3RB21 53
3RB21 63
S3
S6
S10/S12
70 mm
120 mm
145 mm
Siemens · 2011
23