Instruction For Accessories - Mitsubishi Electric C Series Handling And Maintenance

3.6.9 Instruction for accessories

(1) Internal accessories
The following devices are installed into the circuit breakers.
For the accessories with lead wires, allow at least 8 mm spacing when circuit breakers are installed side by side.
Alarm switch
AL
This switch is for electrically indi-
cate tripping of the circuit break-
ers.
Auxiliary switch
AX
This is for indicating ON/OFF
state of the circuit breakers elec-
trically.
Shunt trip
SHT
The device to electrically trip
the circuit breakers from a
remote position.
The allowable operation volt-
age range is 70 to 110% of
rated voltage.
Under voltage trip
UVT
The device for tripping the circuit
breakers automatically when
supply voltage comes down. The
operating voltage is 70 to 35% of
the UVT rated voltage.
At 85% and above of the rated
voltage the circuit breaker can be
cosed.
Lead wire terminal block
LT, SLT
This is connection with internal auxiliary devices, and
can be prepared according to your designation.
(Dimensions of LT or SLT differs somewhat accord-
ing to number of pieces attached and model of aux-
iliary devices.)
41
EAL
95
The switch for electrically indicat-
98
ing trip state of the earth leakage
Buzzer
circuit breaker by ground fault.
96 Lamp
Smaller frame than 225A are pro-
vided with SLT as the standard
arrangement.
(It is attached to the back of the
11
circuit breaker of built-in type.)
Lamp 1
14
12 Lamp 2
TBM
This device is for remotely test-
ing by applying voltage. The
same control sequence as SHT
of NF can be assembled, and
parallel connection of TBMs is
possible. (SLT is attached as
the standard.)
MG
Attaching insulation switch en-
ables measurement of interpole
meg at the load side simply by
turning off the earth leakage
circuit breaker.
Earth leakage alarm switch
Test button module
Insulation switch
EALa
EALb
EALc