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4 Operations on switch disconnector
4.1
Types of operating mechanisms
QMT switches can be provided with four kind of operating mechanisms:
FOR LOAD BREAK SWITCHES
- LT: operator independent operating mechanism which operates under load
- 3D: operator independent, energy stored operating mechanism which operates under load
FOR A VACUUM SWITCHES
- NL: operator dependent manual operating mechanism which operates in the absence of load
In the following table it is possible to see a standard operating mechanism that is provided for
each module type. See the pages 56, 57, 58, 59 for the use of the various operating mechanisms.
* With modified mimic diagram
Module
Type
Standard
operating
mechanism
Optional
operating
mechanism
DS1
LT
3D
DSS/DS
LT
3D
RS
--
--
RC
--
--
CCST
E
--
DL, DLM
3D
--
BM1/ BMS
NL
3D
BMR
LT*
3D
BMC
LT
--
MU
--
--
MUR
--
--
MUTV
NL
LT
CCT
-
-
CCL
-
-
FF
NL
3D
BMSL
NL
3D
Summary of Contents for QMT Series
Page 1: ...Y4419D 01GF 18W12 QMT Manuale installatore Installation manual ...
Page 2: ...2 IT UK ITALIANO 3 ENGLISH 45 QMT ...
Page 15: ...Quadri Media Tensione QMT Manuale installatore 15 Tipo 2 Tipo 3 Tipo 4 ...
Page 44: ......
Page 57: ...Medium voltage switchgear QMT 57 Installation manual Type 2 Type 3 Type 4 ...
Page 86: ...86 Notes ...
Page 87: ...87 ...