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BETA Protecting
Residual Current Protective Devices
Additional components
2/14
Siemens ET B1 · 10/2008
2
*
You can order this quantity or a multiple thereof.
■
Overview
Auxiliary switches (AS) signal the contact position of the RCCB.
Remote controlled mechanisms are used for the remote ON/OFF
switching of RCCBs. They also enable local manual switching.
A blocking function permits maintenance work. A tripped RCCB
must be acknowledged prior to switching back on.
The leakage current measurement device detects the leakage
currents – like the circuit breaker – thus providing a direct statement
as to the current loading of the RCCB. It is used to measure leakage
currents up to 300 mA. This requires a voltmeter with an internal
resistance more than 1 M /V and a measuring range for AC
voltages of U
rms
= 1 mV to 2 V V. For the fault-free operation of
an RCCB, the measured leakage current should be no greater
than 1/3 of the rated residual current.
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Benefits
•
Using captive brackets, the remote controlled mechanism can
be attached (or retrofitted) to the right-hand side of the basic
device without the need for tools
•
Bus systems, such as instabus KNX, AS-Interface bus or
PROFIBUS, can be integrated in the communication over
binary inputs
•
The leakage current measurement device enables the systematic
selection of the rated residual current, thus preventing the
inadvertent tripping of RCCBs.
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Technical specifications
Auxiliary switches (AS)
Auxiliary switches (AS)
5
SW3 30.
5
SW3 330
Standards
IEC/EN 62019 (VDE 0640)
Approved acc. to
IEC 62019; EN 62019
Terminals
•
Conductor cross-section
mm
2
0.75 ... 2.5
•
Tightening torques
Nm 0.6 ... 0.8
Short-circuit protection
B6 or C6 or gL/gG 6 A fuse
Min. contact load
50
mA/24 V
Max. contact load
• 230
V AC, AC-12
A
6
5
• 230
V AC, AC-14
A
3.6
--
• 220
V DC, DC-12
A
1
0.5
© Siemens AG 2008