Siemens Instrumentation
Selector Switch (Ammeter Selector Switch) – 3LD4001-4DC20-0RC0
The Siemens 3LD4001-4DC20-0RC0
is an instrumentation cam-operated rotary switch, commonly used as an Ammeter
Selector Switch (ASS) in 3-phase electrical systems. It is designed
to allow a single ammeter to measure current from different phases (R-Y-B)
by switching between inputs, making it a compact and cost-effective solution
for panel metering applications.
This switch is widely used in MCC panels, PCC panels, distribution boards, and control panels, where phase-wise current monitoring is required without installing multiple meters.
Key Features
|
Parameter |
Specification |
|
Product Series |
Siemens SENTRON 3LD4 |
|
Part Number |
3LD4001-4DC20-0RC0 |
|
Product Type |
Ammeter Selector Switch |
|
Function |
Phase current selection (RYB) |
|
Positions |
4 (R–Y–B–OFF) |
|
Rated Operational Current |
6A / 10A (instrumentation duty) |
|
Switching Angle |
90° rotary operation |
|
Application |
Current measurement switching |
|
Mounting Type |
Panel mount (front operated) |
|
Standard Compliance |
IEC instrumentation switch
standards |
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