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3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
GWA 4NEB 430 0999-02b
4-47
4.7.3 3RB12 electronic overload relays
Type
3RB12 46
3RB12 53
3RB12 57
3RB12 62
Width
70 mm
120 mm
145 mm
230 mm
General specifications
Tripped at
Overload, phase loss, phase imbalance (>40% in acc. with NEMA),
ground fault, and operation of thermistor motor protection
1
)
Tripping class
In acc. with IEC 60 947-4-1
CLASS 5, 10, 15, 20, 25, and 30; adjustable by means of a 6-way rotary
switch
Phase loss sensitivity
Yes
Overload warning
Yes, as of 1.5 x
I
e
given a symmetric load, and as of 0.85 x
I
e
given an
asymmetric load
Resetting and recovery
Resetting options after tripping
Manual, remote, and automatic resetting
1
)
Recovery time
With automatic reset
min
When tripped by overcurrent: 5 (stored permanently)
When tripped by thermistor: time until the motor temperature 5K
sinks under the operating temperature
When tripped by ground fault: no automatic reset
With manual reset
min
When tripped by overcurrent: 5 (stored permanently)
When tripped by thermistor: time until the motor temperature 5K
sinks under the operating temperature
When tripped by ground fault: immediate
With remote reset
min
When tripped by overcurrent: 5 (stored permanently)
When tripped by thermistor: time until the motor temperature 5K
sinks under the operating temperature
When tripped by ground fault: immediate
Configuration
Indication of operating status on device
Yes, with 3 LEDs; green "Ready" LED, red "Overload" LED, and red
"Ground fault" LED
2
)
Test function
Yes, with combined TEST/RESET button
2
)
Reset button
Yes, with combined TEST/RESET button
2
)
Stop button
Yes, with combined TEST/RESET button
2
)
For the safe operation of motors with
increased safety protection
EC special test certificate number in
compliance with directive 94/9/EC
PTB 01 ATEX 3220
Ambient temperatures
Storage/transportation
°C
-40 to +80
Operation
°C
-25 to +70
Temperature compensation
°C
Up to 70
Permissible rated current at
Internal cubicle temperature of 60 °C
%
100 (current reduction is not required at above +60 °C)
Internal cubicle temperature of 70 °C
%
100 (current reduction is not required at above +60 °C)
Repetition terminals
Terminal for contactor coil
Not required
Auxiliary switch repetition terminal
Not required
Degree of protection
In acc. with IEC 60 529/DIN VDE 0470
Part 1
IP 20 (
≤
100 A max. set current
I
e
IP 00 (
≤
100 A max. set current
I
e
Shock protection
In acc. with DIN VDE 0106 Part 100
Protected
against finger
touch
Protected against finger touch with cover
Sinus shock resistance
In acc. with IEC 68 Part 2-27
g
/ms
15/11
EMC noise immunity
Conducted
disturbance neutralization - burst
In acc. with IEC 61 000-4-4:
(corresponds to severity grade 3)
kV
2
Conducted
disturbance neutralization - surge
In acc. with IEC 61 000-4-5:
(corresponds to severity grade 3)
kV
2
Electrostatic discharge
In acc. with IEC 61 000-4-2:
(corresponds to severity grade 3)
kV
8
Field-related disturbance neutralization
In acc. with IEC 61 000-4-3:
(corresponds to severity grade 3)
V/m
10
EMC emitted interference
Limit value class B in acc. with EN 55 011
Resistance to extreme climates
(atmospheric humidity)
%
100
Dimensions
See dimensioned drawings
Site altitude
m
Up to 2000 above sea level
Construction type/mounting
Stand-alone
installation
3
)
Direct mounting/stand-alone installation without addi-
tional terminal bracket
4
)
1) Tripped at ground fault only in the case of devices with the order number suffi-
xes 20 and 30 or in conjunction with the external summation current transformer
3) Snap-on attachment to 35 mm rail or screw-on attachment with
accessories
2) For a detailed explanation, see "Description".
4) For screw-on attachment